Electric vertical lifting device for furniture and sofa

Abstract

The utility model discloses a kind of furniture electric vertical lifting device and sofa.The device includes lifting mechanism and driving mechanism.Lifting mechanism is made of first and second parallelogram transmission mechanism sharing a vertical transmission connecting rod, simple structure, transmission stability.Driving mechanism includes take-up reel and pull rope driven by motor, and lifting is controlled by winding or releasing pull rope.Pull rope deforms first parallelogram mechanism, and second parallelogram mechanism is driven to move by transmission connecting rod, so as to realize the vertical lifting of its top support piece.One take-up reel can synchronously control multiple lifting mechanisms, realize linkage.Lifting rocker lever can be selected to further increase lifting height.The device has the advantages of stable structure, good synchronism and smooth operation, and is particularly suitable for lifting control of electric sofa armrest.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to an electric vertical lifting device for furniture and a sofa. Background Technology

[0002] Sofas are common pieces of furniture in daily life. They are multi-seat chairs with cushions, backrests made of springs or thick foam, and armrests on both sides. The armrests are a particularly important part, as they support the user's elbows, allowing for better relaxation and support, thus improving the user's experience. Therefore, existing technology has modified and upgraded sofas to include height-adjustable armrests.

[0003] For example, patent publication number CN222264844U, entitled "A Liftable Armrest for a Sofa," filed on March 25, 2024, discloses a sofa with liftable armrests, primarily achieved by using electric push rods. While this patent allows for vertical armrest lifting, the presence of armrests on both sides of the sofa necessitates the use of separate electric push rods on each side. This not only complicates the overall structure but also makes it difficult to ensure simultaneous lifting of both armrests. Utility Model Content

[0004] This utility model provides an electric vertical lifting device for furniture and a sofa, aiming to solve the problem that in the prior art, the sofa armrests are not only complex in overall structure during vertical lifting, but also difficult to ensure that the armrests on both sides can be lifted and lowered at the same time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an electric vertical lifting device for furniture, comprising: a plurality of lifting mechanisms and a drive mechanism for simultaneously driving the plurality of lifting mechanisms to lift. Several of the aforementioned lifting mechanisms include a first parallelogram transmission mechanism and a second parallelogram transmission mechanism that share a common transmission link. The drive mechanism includes a take-up turntable, several pull ropes, and a power device for driving the take-up turntable to rotate; one end of each of the pull ropes is connected to one of the lifting mechanisms, and the other end is connected to the take-up turntable.

[0006] In one embodiment, the transmission link has two first rotation centers in the same vertical direction; The first parallelogram transmission mechanism includes a first lifting link that is rotatably connected to the transmission link; The second parallelogram transmission mechanism includes a support member, on which two second rotation centers are arranged in the same vertical direction. The distance between the two first rotation centers is the same as the distance between the two second rotation centers.

[0007] In one embodiment, the first parallelogram transmission mechanism further includes a fixing member and a second lifting link; the fixing member is provided with a first fixing center and a second fixing center; The first lifting link is provided with a first lifting center and a second lifting center; the first lifting center is coaxially engaged with the first fixed center, and the second lifting center is coaxially engaged with one of the first rotation centers of the transmission link; The second lifting link is provided with a third lifting center and a fourth lifting center. The third lifting center and the second fixed center are coaxially engaged. The fourth lifting center is coaxially engaged with another first rotation center of the transmission link.

[0008] In one embodiment, the second parallelogram transmission mechanism further includes a first driven link and a second driven link; The first driven link is provided with a first driven center and a second driven center; the first driven center is coaxially engaged with one of the second rotation centers of the support member; the second driven center is coaxially engaged with one of the first rotation centers of the transmission link; The second driven link is provided with a third driven center and a fourth driven center. The third driven center is coaxially engaged with another second rotation center of the support member; the fourth driven center is coaxially engaged with another first rotation center of the transmission link.

[0009] In one embodiment, the end of the first lifting link away from the second lifting center extends outward to form an extension rod; The pull rope is fixedly connected to the end of the extension rod; In one embodiment, the lifting mechanism further includes a lifting rocker arm, on which a first rocker arm center and a second rocker arm center are provided; The second driven link extends away from the third driven center to form an auxiliary link, and the end of the auxiliary link is provided with an auxiliary center that is coaxially engaged with the center of the second rocker arm; The second lifting link is provided with a rocker arm connection center, which is located between the first lifting center and the second lifting center; the rocker arm connection center is coaxially engaged with the first rocker arm center.

[0010] In one embodiment, a return spring is connected between the first lifting link and the fixing member, and the connection position of the return spring and the first lifting link is located between the first lifting center and the second lifting center.

[0011] In one embodiment, a return spring is connected between the first lifting link and the fixing member. The connection position of the return spring and the first lifting link is located between the first lifting center and the second lifting center. The end of the return spring away from the first lifting link is connected to the end of the lifting rocker arm away from the center of the second rocker arm.

[0012] In one embodiment, the drive mechanism further includes several sets of pulley mechanisms that cooperate with several pull ropes. The several sets of pulley mechanisms include a first guide wheel and a second guide wheel. The pull rope passes through the first guide wheel and the second guide wheel in sequence and is then connected to the extension rod.

[0013] In one embodiment, the outer wall of the take-up turntable is provided with a ring groove for receiving the pull rope.

[0014] In a second aspect, this utility model embodiment also provides a sofa, including a sofa body and the aforementioned electric vertical lifting device for furniture. The lifting mechanism is provided in two sets, with the two sets of lifting mechanisms respectively located on both sides of the sofa body. The output ends of both sets of lifting mechanisms are provided with sofa armrests.

[0015] In one embodiment, the take-up turntable is positioned between the two sets of lifting mechanisms.

[0016] The advantages of this utility model compared with the prior art are: (1) Simple structure and stable transmission: The core transmission mechanism adopts a parallelogram structure, whose inherent characteristics (the opposite sides always remain parallel) ensure the stability and reliability of the movement during the lifting process.

[0017] (2) Synchronous control and linkage lifting: Multiple lifting mechanisms can be controlled simultaneously through a common drive mechanism (wind reel), which can realize the synchronous lifting of multiple output ends (such as the armrests on both sides of the sofa).

[0018] (3) Vertical lifting and precise positioning: The parallelogram mechanism is used to convert the rotational motion into vertical linear motion, which realizes the stable lifting and lowering of the support and its components (such as sofa armrests) in the vertical direction.

[0019] (4) Space optimization and flexible layout: By setting up pulley blocks to guide the ropes, interference with other furniture structures can be reduced, making the overall layout more reasonable and flexible.

[0020] (5) Smooth operation and orderly storage: The winding turntable is equipped with a ring groove so that the pull rope can be neatly wound and stored, ensuring the stability of the entire device during operation.

[0021] (5) Quick reset and reliable performance: The addition of a reset spring can assist the mechanism to quickly reset during the descent process and enhance the responsiveness and reliability of the downward movement.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a furniture electric vertical lifting device provided in an embodiment of this utility model; Figure 2 A three-dimensional structural diagram of the lifting mechanism of an electric vertical lifting device for furniture provided in this embodiment of the utility model; Figure 3 A three-dimensional structural view of a furniture electric vertical lifting device provided in an embodiment of this utility model from another angle; Figure 4 A three-dimensional structural diagram of a furniture electric vertical lifting device installed on a sofa body, provided for an embodiment of this utility model; Figure 5 A cross-sectional view of a furniture electric vertical lifting device installed on a sofa body and with the sofa armrests in a lowered state, provided for an embodiment of this utility model; Figure 6 for Figure 5 A magnified view of a portion of region I; Figure 7 A cross-sectional view of a furniture electric vertical lifting device installed on a sofa body and with the sofa armrests in the raised state, provided for an embodiment of this utility model; Figure 8 for Figure 7 A magnified view of a portion of region II.

[0024] Figure label: 1. First parallelogram transmission mechanism; 11. First lifting link; 111. First lifting center; 112. Second lifting center; 113. Extending rod; 114. First hanging pin; 12. Second lifting link; 121. Third lifting center; 122. Fourth lifting center; 123. Rocker arm connection center; 13. Fixing component; 131. First fixing center; 132. Second fixing center; 2. Second parallelogram transmission mechanism, 21. First driven link, 211. First driven center, 212. Second driven center, 22. Second driven link, 221. Third driven center, 222. Fourth driven center, 223. Auxiliary rod, 224. Auxiliary center, 23. Support member, 231. Second rotation center; 3. Transmission connecting rod; 31. First rotation center; 4. Drive mechanism; 41. Take-up turntable; 411. Ring groove; 42. Pull rope; 43. Power unit; 44. First guide wheel; 45. Second guide wheel; 5. Raise the rocker arm; 51. Center of the first rocker arm; 52. Center of the second rocker arm; 53. Second hanging pin; 6. Return spring; 7. Sofa body; A. First hinge point; B. Second hinge point; C. Third hinge point; D. Fourth hinge point; E, the fifth hinge point; F, the sixth hinge point. Detailed Implementation

[0025] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] Please see Figure 1-8 This utility model embodiment provides a furniture electric vertical lifting device, including: a plurality of lifting mechanisms and a drive mechanism 4 that simultaneously drives the plurality of lifting mechanisms to lift. Several of the aforementioned lifting mechanisms include a first parallelogram transmission mechanism 1 and a second parallelogram transmission mechanism 2 that share a common transmission link 3; The drive mechanism 4 includes a take-up turntable 41, several pull ropes 42, and a power device 43 for driving the take-up turntable 41 to rotate; one end of each of the pull ropes 42 is connected to one of the lifting mechanisms, and the other end is connected to the take-up turntable 41.

[0030] The lifting mechanism in this embodiment consists of two sets of parallelogram transmission mechanisms. The input end of the lifting mechanism is located on the first parallelogram transmission mechanism 1, and the second parallelogram transmission mechanism 2 serves as the output end. Specifically, when the take-up turntable 41 rotates, the pull rope 42 winds around it, causing it to contract. This contraction pulls the first parallelogram transmission mechanism 1, which in turn deforms the second parallelogram transmission mechanism 2 via the transmission link 3, thus raising the output end of the second parallelogram transmission mechanism 2. Conversely, when the take-up turntable 41 rotates in the opposite direction, the first and second parallelogram transmission mechanisms 1 fall under their own weight, causing the output end of the second parallelogram transmission mechanism 2 to descend. This achieves the lifting and lowering of the output end of the second parallelogram transmission mechanism 2, resulting in a simple structure and stable transmission mechanism. Furthermore, in this embodiment, several lifting mechanisms are controlled by the same take-up turntable 41, enabling simultaneous control of the lifting and lowering of multiple mechanisms.

[0031] In a further embodiment, the power unit 43 includes, but is not limited to, a motor, and the take-up turntable 41 is disposed at the output end of the motor. Driven by the motor, the take-up turntable 41 rotates clockwise and counterclockwise.

[0032] Specifically, the transmission link 3 has two first rotation centers 31 in the same vertical direction; The first parallelogram transmission mechanism 1 includes a first lifting link 11 that is rotatably connected to the transmission link 3; The second parallelogram transmission mechanism 2 includes a support member 23, on which two second rotation centers 231 are arranged in the same vertical direction. The distance between the two first rotation centers 31 is the same as the distance between the two second rotation centers 231.

[0033] This embodiment utilizes two sets of parallelogram transmission mechanisms to lift the support member 23 upwards. Due to the special structure of the parallelogram, the parallel sides always remain parallel. Therefore, in this embodiment, the transmission link 3 is set along the vertical direction. When the first lifting link 11 rotates, the first parallelogram transmission mechanism 1 can drive the transmission link 3 to move in the vertical direction. Similarly, the transmission link 3 drives the support member 23 to move in the vertical direction through the second parallelogram transmission mechanism 2, thereby realizing the movement of the support member 23 in the vertical direction.

[0034] When the sofa armrest is fixed to the support member 23, the first parallelogram transmission mechanism 1 can be deformed by pulling the first lifting link 11, which in turn drives the transmission link 3 to move upward in the vertical direction. The transmission link 3 drives the second parallelogram transmission mechanism 2 to deform, which in turn causes the support member 23 to move upward, thereby causing the sofa armrest fixed to the support member 23 to move upward.

[0035] In a further embodiment, the first parallelogram transmission mechanism 1 further includes a fixing member 13 and a second lifting link 12; the fixing member 13 is provided with a first fixing center 131 and a second fixing center 132; The first lifting link 11 is provided with a first lifting center 111 and a second lifting center 112; the first lifting center 111 is coaxially engaged with the first fixed center 131, and the second lifting center 112 is coaxially engaged with one of the first rotation centers 31 of the transmission link 3. The second lifting link 12 is provided with a third lifting center 121 and a fourth lifting center 122. The third lifting center 121 and the second fixed center 132 are coaxially engaged. The fourth lifting center 122 is coaxially engaged with another first rotation center 31 of the transmission link 3.

[0036] In this embodiment, the first lifting link 11, the second lifting link 12, the transmission link 3, and the fixing member 13 cooperate to form the first parallelogram transmission mechanism 1. Figure 6 and Figure 8 As shown, the first fixed center 131 and the first lifting center 111 cooperate to form the first hinge point A; the second fixed center 132 and the third lifting center 121 cooperate to form the second hinge point B; the fourth lifting center 122 and one of the first rotation centers 31 of the transmission link 3 cooperate to form the third hinge point C; and the other first transmission center 31 and the second lifting center 112 cooperate to form the fourth hinge point D. The first hinge point A, the second hinge point B, the third hinge point C, and the fourth hinge point D constitute the four hinge points of the first parallelogram transmission mechanism 1. The first hinge point A and the second hinge point B are arranged along the same vertical direction, and the third hinge point C and the fourth hinge point D are also arranged along the same vertical direction.

[0037] In this embodiment, for ease of assembly, the first lifting center 111, the second lifting center 112, the third lifting center 121, the fourth lifting center 122, the first fixing center 131, the second fixing center 132, and the two first rotation centers 31 are all configured as through holes on their respective components, and are coaxially rotated and connected to other components through rotating shafts.

[0038] In a further embodiment, the second parallelogram transmission mechanism 2 further includes a first driven link 21 and a second driven link 22; The first driven link 21 is provided with a first driven center 211 and a second driven center 212; the first driven center 211 is coaxially engaged with one of the second rotation centers 231 of the support member 23; the second driven center 212 is coaxially engaged with one of the first rotation centers 31 of the transmission link 3; The second driven link 22 is provided with a third driven center 221 and a fourth driven center 222. The third driven center 221 is coaxially engaged with another second rotation center 231 of the support member 23; the fourth driven center 222 is coaxially engaged with another first rotation center 31 of the transmission link 3.

[0039] In this embodiment, the first driven link 21, the second driven link 22, the support member 23, and the transmission link 3 cooperate to form the second parallelogram transmission mechanism 2. Figure 6 and Figure 8 As shown, the first driven center 211 cooperates with one of the rotation centers 231 of the support member 23 to form the fifth hinge point E; the third driven center 221 cooperates coaxially with the other second rotation center 231 of the support member 23 to form the sixth hinge point F; the second driven center 212, the fourth lifting center 122 cooperate with one of the first rotation centers 31 of the transmission link 3 to form the third hinge point C; the fourth driven center 222, the second lifting center 112 cooperate with the other first rotation center 31 of the transmission link 3 to form the fourth hinge point D. The third hinge point C, the fourth hinge point D, the fifth hinge point E, and the sixth hinge point F constitute the four hinge points of the second parallelogram transmission mechanism 2. The first hinge point A and the second hinge point B are set along the vertical direction, and the third hinge point C, the fourth hinge point D, the fifth hinge point E, and the sixth hinge point F are also set along the vertical direction.

[0040] In this embodiment, for ease of assembly, the first driven center 211, the second driven center 212, the third driven center 221, and the fourth driven center 222 are all configured as through holes on their respective components, and are coaxially rotatably connected to other components via rotating shafts.

[0041] In a further embodiment, the end of the first lifting link 11 away from the second lifting center 112 extends outward to form an extension rod 113; The pull rope 42 is fixedly connected to the end of the extension rod 113; In this embodiment, the pull rope 42 retracts under the drive of the take-up turntable 41, thereby pulling the first lifting link 11 to rotate around the first lifting center 111. This causes the first parallelogram transmission mechanism 1 to deform, and drives the transmission link 3 to move upward in the vertical direction. The transmission link 3 drives the second parallelogram transmission mechanism 2 to deform, and causes the support member 23 to move upward, thereby causing the sofa armrest fixed on the support member 23 to move upward. When the take-up turntable 41 rotates in the opposite direction, it falls under the weight of the first parallelogram transmission mechanism 1 and the second parallelogram transmission mechanism 2, causing the support member 23 of the second parallelogram transmission mechanism 2 to descend, thus lowering the sofa armrest.

[0042] In a further embodiment, the drive mechanism 4 further includes several sets of pulley mechanisms that cooperate with several pull ropes 42. In this embodiment, the several sets of pulley mechanisms include a first guide wheel 44 and a second guide wheel 45, and the pull ropes 42 pass through the first guide wheel 44 and the second guide wheel 45 in sequence before being connected to the extension rod 113.

[0043] In this embodiment, the pull rope 42 is equipped with a corresponding pulley mechanism. By arranging the pulley mechanism, the pull rope 42 can be routed according to the arrangement of the pulley mechanism, thereby minimizing interference with other structures of the furniture. In this embodiment, a first guide wheel 44 and a second guide wheel 45 are provided, so that the pull rope 42 can pull the extension rod 113 downward in the vertical direction.

[0044] In a further embodiment, the outer wall of the take-up turntable 41 is provided with an annular groove 411 for receiving the pull rope 42.

[0045] When the take-up turntable 41 rotates, the pull rope 42 can be stored in the annular groove 411, ensuring the stability of the overall structure during operation.

[0046] In a further embodiment, a return spring 6 is connected between the first lifting link 11 and the fixing member 13, and the connection position of the return spring 6 and the first lifting link 11 is located between the first lifting center 111 and the second lifting center 112.

[0047] In this embodiment, a reset spring 6 is provided so that when the take-up turntable 41 is releasing the wire, the reset spring 6 can pull the first lifting link 11 to reset, so that the first quadrilateral transmission mechanism 1 and the second quadrilateral transmission mechanism 2 can reset more quickly.

[0048] In another embodiment, such as Figure 2 As shown, the lifting mechanism also includes a lifting rocker arm 5, on which a first rocker arm center 51 and a second rocker arm center 52 are provided; The second driven link 22 extends away from the third driven center 221 to form an auxiliary link 223, and the end of the auxiliary link 223 is provided with an auxiliary center 224 that is coaxially engaged with the center 52 of the second rocker arm; The second lifting link 12 is provided with a rocker arm connection center 123, which is located between the first lifting center 111 and the second lifting center 112; the rocker arm connection center 123 is coaxially engaged with the first rocker arm center 51.

[0049] In this embodiment, the first rocker arm center 51, the second rocker arm center 52, the auxiliary center 224, and the rocker arm connection center 123 are all provided with through holes on their respective components, and are coaxially rotatably connected to other components through a rotating shaft.

[0050] In this embodiment, a lifting rocker arm 5 is provided, which allows the support member 23 to be further raised. Specifically, as shown... Figure 6 and Figure 8 As shown, as the support member 23 is lifted upward, the distance between the second hinge point B and the fourth hinge point D increases. The second driven link 22 is pulled by the lifting rocker arm 5. The second driven link 22 moves upward and rotates clockwise around the fourth hinge point D, which compresses the second parallelogram transmission mechanism 2. The distance between the third hinge point C and the sixth hinge point F increases, which further lifts the support member 23.

[0051] In this embodiment, the end of the return spring 6 away from the first lifting link 11 is connected to the end of the lifting rocker arm 5 away from the center 52 of the second rocker arm.

[0052] Specifically, a first hook 114 is provided on the first lifting link 11, and a second hook 53 is provided on the lifting rocker arm 5. The first hook 114 is located between the first lifting center 111 and the second lifting center 112, and the second hook 53 is located at the end of the lifting rocker arm 5 away from the second rocker arm center 52. The two ends of the return spring 6 are respectively attached to the first hook 114 and the second hook 53. Under the action of the tension of the return spring 6, the first lifting link 11 maintains the tendency to rotate around the first lifting center 111, and the lifting rocker arm 5 maintains the tendency to rotate around the second rocker arm center 52.

[0053] In another embodiment, such as Figure 4As shown in the figure, this utility model embodiment also discloses a sofa, including a sofa body 7 and the aforementioned electric vertical lifting device for furniture. Two sets of lifting mechanisms are provided, each set located on one side of the sofa body 7. Each set of lifting mechanisms has an armrest at its output end. The reel 41 is positioned in the middle of the two sets of lifting mechanisms.

[0054] The working principle of this utility model embodiment is as follows, refer to... Figure 5 As shown in the figure, this includes the process of the sofa armrests rising and the process of the sofa armrests falling.

[0055] (1) Sofa armrest lifting process: The take-up turntable 41 rotates, and at the same time pulls the two pull ropes 42 around the take-up turntable 41. The pull ropes 42 contract, thereby pulling the first lifting link 11 to rotate around the first lifting center 111 (first junction point A), causing the first parallelogram transmission mechanism 1 to deform. At this time, the distance between the second hinge point B and the fourth hinge point D gradually increases. The transmission link 3 moves upward along the vertical direction. The transmission link 3 drives the second parallelogram transmission mechanism 2 to deform, causing the distance between the third hinge point C and the sixth hinge point F to gradually increase, causing the support member 23 to move upward, thereby causing the sofa armrest fixed on the support member 23 to rise. During the above process, as the support member 23 is lifted upward, the distance between the second hinge point B and the fourth hinge point D becomes larger and larger. The second driven link 22 is pulled by the lifting rocker arm 5. The second driven link 22 moves upward and rotates clockwise around the fourth hinge point D, which compresses the second parallelogram transmission mechanism 2. The distance between the third hinge point C and the sixth hinge point F becomes larger and larger, which causes the support member 23 to be lifted further.

[0056] (2) Sofa armrest descent process: The take-up reel 41 rotates in the opposite direction, the pull rope 42 is released from the take-up reel 41, the pull rope 42 extends, and the support 23, the first parallelogram transmission mechanism 1, and the second parallelogram transmission mechanism 2 reset under their own gravity.

[0057] Furthermore, under the tension of the return spring 6, the first lifting link 11 maintains the tendency to rotate around the first lifting center 111, and the lifting rocker arm 5 maintains the tendency to rotate around the second rocker arm center 52, so that the support member 23, the first parallelogram transmission mechanism 1, and the second parallelogram transmission mechanism 2 can be quickly reset.

[0058] In summary, compared with the prior art, this utility model has the following advantages: (1) Simple structure and stable transmission: The core transmission mechanism adopts a parallelogram structure, whose inherent characteristics (the opposite sides always remain parallel) ensure the stability and reliability of the movement during the lifting process.

[0059] (2) Synchronous control and linkage lifting: Multiple lifting mechanisms can be controlled simultaneously through a common drive mechanism (wind reel turntable 41), which can realize the synchronous lifting of multiple output ends (such as the armrests on both sides of the sofa).

[0060] (3) Vertical lifting and precise positioning: The rotational motion is converted into vertical linear motion by using a parallelogram mechanism, which realizes the stable lifting and lowering of the support 23 and its components (such as sofa armrests) in the vertical direction.

[0061] (4) Space optimization and flexible layout: By setting up pulley blocks to guide the ropes, interference with other furniture structures can be reduced, making the overall layout more reasonable and flexible.

[0062] (5) Smooth operation and orderly storage: The winding turntable 41 is equipped with a ring groove 411 so that the pull rope 42 can be neatly wound and stored, ensuring the smooth operation of the entire device.

[0063] (5) Quick reset and reliable performance: The addition of a reset spring 6 can assist the mechanism to quickly reset during the descent process and enhance the responsiveness and reliability of the downward movement.

[0064] Extended range design for higher lifting: An optional lifting rocker arm mechanism can be added to further increase the lifting height on the basis of basic lifting, expanding the adjustment range of the device.

[0065] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A furniture electric vertical lifting device, characterized in that, include: A plurality of lifting mechanisms and a drive mechanism that simultaneously drives the plurality of lifting mechanisms to lift. Several of the aforementioned lifting mechanisms include a first parallelogram transmission mechanism and a second parallelogram transmission mechanism that share a common transmission link. The drive mechanism includes a take-up turntable, several pull ropes, and a power device for driving the take-up turntable to rotate; one end of each of the pull ropes is connected to one of the lifting mechanisms, and the other end is connected to the take-up turntable.

2. The furniture electric vertical lifting device according to claim 1, characterized in that, The transmission link has two first rotation centers in the same vertical direction; The first parallelogram transmission mechanism includes a first lifting link that is rotatably connected to the transmission link; The second parallelogram transmission mechanism includes a support member, on which two second rotation centers are arranged in the same vertical direction. The distance between the two first rotation centers is the same as the distance between the two second rotation centers.

3. The furniture electric vertical lifting device according to claim 2, characterized in that, The first parallelogram transmission mechanism further includes a fixing member and a second lifting link; the fixing member is provided with a first fixing center and a second fixing center; The first lifting link is provided with a first lifting center and a second lifting center; the first lifting center is coaxially engaged with the first fixed center, and the second lifting center is coaxially engaged with one of the first rotation centers of the transmission link; The second lifting link is provided with a third lifting center and a fourth lifting center. The third lifting center and the second fixed center are coaxially engaged. The fourth lifting center is coaxially engaged with another first rotation center of the transmission link.

4. The furniture electric vertical lifting device according to claim 3, characterized in that, The second parallelogram transmission mechanism also includes a first driven link and a second driven link; The first driven link is provided with a first driven center and a second driven center; the first driven center is coaxially engaged with one of the second rotation centers of the support member; the second driven center is coaxially engaged with one of the first rotation centers of the transmission link; The second driven link is provided with a third driven center and a fourth driven center. The third driven center is coaxially engaged with another second rotation center of the support member; the fourth driven center is coaxially engaged with another first rotation center of the transmission link.

5. The electric vertical lifting device for furniture according to claim 3, characterized in that, The end of the first lifting link that is away from the second lifting center extends outward to form an extension rod; The pull rope is fixedly connected to the end of the extension rod.

6. The electric vertical lifting device for furniture according to claim 4, characterized in that, The lifting mechanism also includes a lifting rocker arm, on which a first rocker arm center and a second rocker arm center are provided; The second driven link extends away from the third driven center to form an auxiliary link, and the end of the auxiliary link is provided with an auxiliary center that is coaxially engaged with the center of the second rocker arm; The second lifting link is provided with a rocker arm connection center, which is located between the first lifting center and the second lifting center; the rocker arm connection center is coaxially engaged with the first rocker arm center.

7. The electric vertical lifting device for furniture according to claim 5, characterized in that, A return spring is connected between the first lifting link and the fixing member, and the connection position of the return spring and the first lifting link is located between the first lifting center and the second lifting center.

8. The electric vertical lifting device for furniture according to claim 6, characterized in that, A return spring is connected between the first lifting link and the fixing member. The connection position of the return spring and the first lifting link is located between the first lifting center and the second lifting center. The end of the return spring away from the first lifting link is connected to the end of the lifting rocker arm away from the center of the second rocker arm.

9. The electric vertical lifting device for furniture according to claim 5, characterized in that, The drive mechanism also includes several sets of pulley mechanisms that cooperate with several pull ropes. The several sets of pulley mechanisms include a first guide wheel and a second guide wheel. The pull rope passes through the first guide wheel and the second guide wheel in sequence and is then connected to the extension rod.

10. The electric vertical lifting device for furniture according to claim 1, 5, or 9, characterized in that, The outer wall of the take-up turntable is provided with a ring groove for receiving the pull rope.

11. A sofa, characterized in that, The device includes a sofa body and an electric vertical lifting device for furniture as described in any one of claims 1 to 10. The lifting mechanism is provided in two sets, which are respectively located on both sides of the sofa body. The output ends of both sets of lifting mechanisms are provided with sofa armrests.

12. The sofa according to claim 11, characterized in that, The take-up turntable is positioned in the middle of the two sets of lifting mechanisms.

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