An electrically powered mechanism for adjusting the backrest of a sofa

Abstract

This utility model relates to an adjustable backrest mechanism for an electric sofa, comprising: a support body; a support seat slidably mounted on the support body along its height direction; a backrest slidably mounted on the support body along its height direction; and a linkage mechanism rotatably mounted on the support body, with the support seat and backrest respectively located at opposite ends of the linkage mechanism. When the support seat is subjected to downward pressure, it slides downward along the height direction of the support body. This downward movement of the support seat at one end of the linkage mechanism causes the linkage mechanism to rotate. Since the backrest is located at the other end of the linkage mechanism, the rotation of the linkage mechanism drives the backrest to move upward along the height direction of the support body, thereby changing the backrest from a first working position to a second working position.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to an adjustable backrest mechanism for an electric sofa. Background Technology

[0002] Currently, most sofas on the market have a relatively fixed structure between the backrest and seat. This traditional design reveals many shortcomings in actual use. When the sofa is not in use, the backrest maintains a fixed angle, making the sofa appear as a large, regular block that occupies a significant amount of indoor space. This results in a huge waste of space for users with limited living space, such as owners of small apartments or in space-constrained office environments, making the entire space appear cramped and affecting the flexibility and comfort of the interior layout.

[0003] In addition, during the process of moving a sofa, because the backrest cannot be changed and the overall shape and size of the sofa are fixed, it is difficult to pass through some narrow passages, doors or stairwells, making the moving process very difficult, and may even cause damage to the sofa itself and the surrounding environment (such as walls, doorways, etc.) due to impact.

[0004] To address these issues, the industry has undertaken several explorations and improvements. Some sofa products have attempted to adopt detachable backrest designs; however, while these designs can reduce the size of the sofa during storage to some extent, the assembly and disassembly processes are often cumbersome and inconvenient. Moreover, frequent disassembly and assembly may reduce the stability of the sofa structure, affecting its lifespan and safety. Therefore, an electrically adjustable sofa backrest mechanism is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an electric sofa backrest adjustable mechanism, which solves the technical problem that the existing sofa backrest and sofa seat are relatively fixed, and the sofa as a whole takes up too much space when not in use.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model embodiment provides an adjustable backrest mechanism for an electric sofa.

[0010] This utility model provides an adjustable backrest mechanism for an electric sofa, comprising:

[0011] Supporting entity;

[0012] The support base is slidably installed on the support body along the height direction of the support body;

[0013] The backrest is slidably mounted on the support body along the height direction of the support body;

[0014] The linkage mechanism is rotatably mounted on the support body, and the bearing seat and backrest are respectively located at both ends of the linkage mechanism;

[0015] When the support seat is subjected to downward pressure, the backrest moves upward along the height direction of the support body, changing the backrest from the first working position to the second working position. The first working position is when the upper surface of the support seat and the upper surface of the backrest are on the same plane, and the second working position is when the upper surface of the backrest is higher than the upper surface of the support seat.

[0016] Optionally, the electric sofa backrest adjustment mechanism also includes:

[0017] The electric telescopic rod is installed between the support body and the linkage mechanism to drive the backrest to change its working position.

[0018] Optionally, the support includes:

[0019] Sofa seat;

[0020] The first support frame is fixedly installed on the sofa seat, and the first support frame is slidably installed on the support body along the height direction of the support body.

[0021] Optionally, there may be at least two first support frames.

[0022] Optionally, the backrest includes:

[0023] Sofa back;

[0024] The second support frame is fixedly installed on the back of the sofa, and slides on the support body along the height direction of the support body.

[0025] Optionally, the linkage mechanism includes:

[0026] The support rod is rotatably mounted on the support body, and elongated holes are formed at both ends of the support rod. The first support frame and the second support frame are slidably mounted in the elongated holes respectively.

[0027] Optionally, the sofa back includes:

[0028] The first sofa back and the second support frame are fixedly installed on the first sofa back;

[0029] The second sofa back is installed on top of the first sofa back via a torsion spring, and the torsion direction of the second sofa back is away from the support seat.

[0030] Optionally, the backrest also includes:

[0031] The limiting block is fixedly installed on the second sofa back and is located on the side of the support body close to the bearing seat. When the limiting block is in contact with the support body, the second sofa back stops rotating relative to the first sofa back.

[0032] Optionally, when the backrest is used as the second function, the second sofa backrest is higher than the support seat along the height direction of the supporting body.

[0033] Optionally, the linkage mechanism may also include:

[0034] The lubricating surface is located inside the elongated hole.

[0035] (III) Beneficial Effects

[0036] The beneficial effects of this utility model are as follows: The adjustable backrest mechanism of the electric sofa of this utility model includes a support body, a support seat, a backrest, and a linkage mechanism. When the support seat is subjected to downward pressure, such as when someone sits on the sofa, the support seat will slide downward along the height direction of the support body. At this time, the downward movement of the support seat at one end of the linkage mechanism will drive the linkage mechanism to rotate. Since the backrest is located at the other end of the linkage mechanism, the rotation of the linkage mechanism will drive the backrest to move upward along the height direction of the support body, thereby changing the backrest from the first working position to the second working position. The first working position is when the upper surface of the support seat and the upper surface of the backrest are on the same plane. When the sofa is not in use, this state makes the overall shape of the sofa more flat and compact, greatly reducing the space occupied by the sofa in the horizontal direction. The second working position is when the upper surface of the backrest is higher than the upper surface of the support seat. This is the common position where the backrest provides support for the user when the sofa is in normal use. This application solves the problem that the relatively fixed backrest of existing sofas leads to excessive space occupation when not in use, and improves the space utilization efficiency and ease of use of the sofa in different usage scenarios. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of the first working position of the electric sofa backrest adjustment mechanism of this utility model.

[0038] Figure 2 This is a three-dimensional structural diagram of the second working position of the electric sofa backrest adjustable mechanism of this utility model;

[0039] Figure 3 This is a three-dimensional structural diagram of the supporting body of this utility model;

[0040] Figure 4 This is a cross-sectional view of the second working position of the adjustable backrest mechanism of the electric sofa of this utility model.

[0041] [Explanation of Labels in the Attached Image]

[0042] 100-Support body, 200-Bearing seat, 300-Backrest, 400-Linkage mechanism, 500-Electric telescopic rod;

[0043] 210 - Sofa seat; 220 - First support frame;

[0044] 310 - Sofa backrest, 320 - Second support frame, 330 - Restriction block;

[0045] 410 - Support rod, 420 - Lubrication surface;

[0046] 311 - First sofa back; 312 - Second sofa back;

[0047] 401 - Long hole. Detailed Implementation

[0048] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper" and "lower" are used interchangeably with... Figure 1 The orientation is used as a reference.

[0049] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0050] like Figures 1 to 4 As shown, this embodiment proposes an adjustable backrest mechanism for an electric sofa, including: a support body 100; a support seat 200, slidably mounted on the support body 100 along the height direction of the support body 100; a backrest 300, slidably mounted on the support body 100 along the height direction of the support body 100; and a linkage mechanism 400, rotatably mounted on the support body 100, with the support seat 200 and the backrest 300 respectively disposed at both ends of the linkage mechanism 400; wherein, when the support seat 200 is subjected to downward pressure, the backrest moves upward along the height direction of the support body 100, causing the backrest 300 to change from a first working position to a second working position. The first working position is when the upper surface of the support seat 200 and the upper surface of the backrest 300 are on the same plane, and the second working position is when the upper surface of the backrest 300 is higher than the upper surface of the support seat 200.

[0051] The adjustable backrest mechanism of the electric sofa provided in this embodiment includes a support body 100, a support seat 200, a backrest 300, and a linkage mechanism 400. The support body 100 is the basic support component of the entire mechanism, providing a stable mounting base and support for the sliding of the support seat 200 and the backrest 300, as well as the rotation of the linkage mechanism 400, ensuring the structural stability of the entire adjustment mechanism and enabling other components to operate normally on it. The support seat 200 is slidably mounted on the support body 100 along the height direction and is mainly used to support the weight of the human body, being the part that the user directly contacts. The backrest 300 is also slidably mounted on the support body 100 along the height direction and is the backrest of the sofa. The linkage mechanism 400 is rotatably mounted on the support body 100, with the support seat 200 and the backrest 300 respectively located at both ends of the linkage mechanism 400. By rotating, the displacement of the support seat 200 can be converted into a corresponding displacement of the backrest 300, thereby achieving a coordinated linkage effect between the two.

[0052] For example, when the support seat 200 is subjected to downward pressure, such as when someone sits on a sofa, the support seat 200 will slide downward along the height direction of the support body 100. At this time, the downward movement of the support seat 200 at one end of the linkage mechanism 400 will drive the linkage mechanism 400 to rotate. Since the backrest 300 is located at the other end of the linkage mechanism 400, the rotation of the linkage mechanism 400 will drive the backrest 300 to move upward along the height direction of the support body 100, thereby changing the backrest 300 from the first working position to the second working position.

[0053] The first working position is when the upper surface of the support seat 200 and the upper surface of the backrest 300 are on the same plane. When the sofa is not in use, this position makes the overall shape of the sofa more flat and compact, greatly reducing the space occupied by the sofa in the horizontal direction. The second working position is when the upper surface of the backrest 300 is higher than the upper surface of the support seat 200. This is the common position where the backrest provides support for the user when the sofa is in normal use. This solves the problem that the relatively fixed backrest of existing sofas causes excessive space occupation when not in use, and improves the space utilization efficiency and ease of use of the sofa in different usage scenarios.

[0054] like Figure 4 As shown, in some examples, the electric sofa backrest adjustment mechanism also includes an electric telescopic rod 500, which is disposed between the support body 100 and the linkage mechanism 400, for driving the backrest 300 to change its working position.

[0055] In this technical solution, the electric telescopic rod 500 is disposed between the support body 100 and the linkage mechanism 400. One end of the electric telescopic rod 500 is rotatably mounted on the support body 100 to ensure that it has a stable support point; the other end is rotatably connected to the linkage mechanism 400. The electric telescopic rod 500 can directly act on the linkage mechanism 400, thereby realizing the control of the working position of the backrest 300.

[0056] When the working position of the backrest 300 needs to be adjusted, the electric telescopic rod 500 converts electrical energy into mechanical energy to achieve the telescopic action. For example, when the backrest 300 needs to be changed from its current position to another working position, the electric telescopic rod 500 will extend or shorten according to the instruction. If the electric telescopic rod 500 extends, it will push the linkage mechanism 400 to rotate clockwise around its rotation point on the support body 100. Since the two ends of the linkage mechanism 400 are respectively connected to the bearing seat 200 and the backrest 300, the backrest 300 will move accordingly along the height direction of the support body 100, so that the backrest 300 changes from the initial working position to the target working position, completing the so-called working position switching. Conversely, when the electric telescopic rod 500 shortens, it will pull the linkage mechanism 400 to rotate in the opposite direction, which will also change the position of the backrest 300, thereby realizing the switching of the backrest between different working positions.

[0057] With the electric telescopic rod 500 installed, users can easily change the working position of the backrest 300 by simply operating the control device connected to the electric telescopic rod 500 (such as a remote control or a control panel on the sofa). This greatly improves the convenience and intelligent experience of using the sofa, and is especially attractive to users with limited mobility or those who pursue a comfortable and convenient lifestyle.

[0058] like Figures 1 to 4 As shown, the support base 200 includes: a sofa seat 210; a first support frame 220, which is fixedly installed on the sofa seat 210 and slides on the support body 100 along the height direction of the support body 100; there are at least two first support frames 220.

[0059] In this technical solution, the sofa seat 210 is the part of the support seat 200 that directly contacts the user and bears the weight of the human body; the first support frame 220 is fixedly installed on the sofa seat 210, ensuring the integration and stability of the entire support seat 200 structure. The first support frame 220 is slidably installed on the support body 100 along the height direction. When the support seat 200 is subjected to downward pressure such as the weight of the human body, the first support frame 220 slides downward along the height direction on the support body 100. This sliding action serves as the starting point for the linkage adjustment of the entire mechanism, providing displacement input for the linkage adjustment of the backrest 300, thereby driving the entire mechanism to change the working position of the backrest 300 through the operation of the linkage mechanism 400.

[0060] like Figures 1 to 4 As shown, the backrest 300 includes: a sofa back 310; and a second support frame 320, which is fixedly installed on the sofa back 310 and slidably installed on the support body 100 along the height direction of the support body 100.

[0061] In this technical solution, the sofa backrest 310 directly contacts the user's back, providing support and comfort when using the sofa; the second support frame 320 is fixedly installed on the sofa backrest 310, and the second support frame 320 extends along the support body 100. The second support frame 320 is slidably mounted on the support body 100 in the height direction. When the electric sofa backrest adjustment mechanism is working, the linkage mechanism 400 will rotate due to the corresponding movement of the support seat 200, thereby pushing or pulling the second support frame 320 to slide along the height direction of the support body 100. As the second support frame 320 slides, the sofa back 310 mounted on it will also move along with it, thereby realizing the movement of the backrest 300 from one working position to another working position, achieving the adjustment needs of the backrest angle and position under different usage scenarios. For example, when the sofa is initially not in use, the backrest 300 can be in the first working position. At this time, the upper surface of the support seat 200 and the upper surface of the backrest 300 are on the same plane. When it is driven by a related force (such as the linkage caused by the movement of the electric telescopic rod 500), the second support frame 320 slides upward along the support body 100, driving the sofa back 310 to rise, adjusting the backrest 300 to the second working position, so that the upper surface of the backrest 300 is higher than the upper surface of the support seat 200, meeting the support needs of the user when sitting.

[0062] like Figure 4 As shown, the linkage mechanism 400 includes: a support rod 410, which is rotatably mounted on the support body 100, with elongated holes 401 formed at both ends of the support rod 410, and the first support frame 220 and the second support frame 320 respectively slidably mounted in the elongated holes 401; and a lubricating surface 420, which is disposed in the elongated holes 401.

[0063] In this technical solution, the support rod 410 is rotatably mounted on the support body 100. Elongated holes 401 are formed at both ends of the support rod 410. The first support frame 220 and the second support frame 320 are slidably mounted within the elongated holes 401. The elongated holes 401 provide sliding tracks for the first support frame 220 and the second support frame 320. When the bearing seat 200 changes position due to external forces such as human weight (e.g., sliding down along the height direction of the support body 100), the first support frame 220 mounted on the bearing seat 200 will slide within the elongated holes 401. The sliding motion within the support rod 410 causes it to rotate around the support body 100. The rotation of the support rod 410, in turn, causes the second support frame 320 to slide within the elongated hole 401 at the other end, thereby changing the position of the backrest 300. Therefore, the elongated hole 401 is a key connection point for the linkage between the support seat 200 and the backrest 300. By constraining the sliding paths of the first support frame 220 and the second support frame 320, it converts the displacement of the support seat 200 into the adjustment action of the backrest 300, ensuring the accuracy and stability of the linkage process.

[0064] The function of the lubricating surface 420 is to reduce the friction generated when the first support frame 220 and the second support frame 320 slide within the elongated hole 401. During the frequent use of the adjustable backrest mechanism of the electric sofa, the first support frame 220 and the second support frame 320 will slide repeatedly within the elongated hole 401. The lubricating surface 420 can effectively reduce the frictional resistance, making the sliding of the first support frame 220 and the second support frame 320 within the elongated hole 401 smoother, and ensuring that the linkage mechanism 400 can respond quickly and accurately to the displacement changes of the support seat 200.

[0065] like Figure 1 , 2 and Figure 4 As shown, the sofa back 310 includes: a first sofa back 311, with a second support frame 320 fixedly mounted on the first sofa back 311; a second sofa back 312, mounted on the top of the first sofa back 311 via a torsion spring, the second sofa back 312 being twisted away from the support seat 200; a limiting block 330, fixedly mounted on the second sofa back 312 and located on the side of the support body 100 near the support seat 200, the second sofa back 312 stopping its rotation relative to the first sofa back 311 when the limiting block 330 is in contact with the support body 100; when the backrest 300 is in its second working state, the second sofa back 312 is higher than the support seat 200 along the height direction of the support body 100.

[0066] In this technical solution, the second support frame 320 is fixedly installed on the first sofa back 311. Since the second support frame 320 slides along the height direction of the support body 100, the first sofa back 311 can adjust its position by utilizing the sliding of the second support frame 320. Simultaneously, the first sofa back 311 also provides a mounting base for the second sofa back 312, bearing its weight. The second sofa back 312 is installed on top of the first sofa back 311 via a torsion spring. The torsion spring provides torsional elasticity to the second sofa back 312, causing its torsion direction to be away from the support seat 200. In actual use, the second sofa back 312 can naturally unfold at a certain angle away from the support seat 200 under the action of the torsion spring to adapt to the user's back support needs, providing a more comfortable back support form.

[0067] The limiting block 330 is fixedly installed on the second sofa back 312 and is located on the side of the support body 100 near the bearing seat 200. When the second sofa back 312 rotates to a certain position under the action of the torsion spring, the limiting block 330 will contact the support body 100. Once the two are in contact, the second sofa back 312 will be prevented from continuing to rotate relative to the first sofa back 311, which can ensure that the second sofa back 312 rotates within a suitable angle range and avoid excessive rotation that could cause structural damage or affect the user experience.

[0068] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electrically powered adjustable mechanism for a sofa backrest, characterized in that, include: Supporting main body (100); The support base (200) is slidably mounted on the support body (100) along the height direction of the support body (100); The backrest (300) is slidably mounted on the support body (100) along the height direction of the support body (100); The linkage mechanism (400) is rotatably mounted on the support body (100), and the bearing seat (200) and the backrest are respectively disposed at both ends of the linkage mechanism (400); When the support seat (200) is subjected to downward pressure, the backrest moves upward along the height direction of the support body (100), so that the backrest (300) changes from the first working position to the second working position. The first working position is when the upper end surface of the support seat (200) and the upper end surface of the backrest (300) are on the same plane, and the second working position is when the upper end surface of the backrest (300) is higher than the upper end surface of the support seat (200).

2. The motorized sofa backrest adjustment mechanism of claim 1, wherein, Also includes: An electric telescopic rod (500) is disposed between the support body (100) and the linkage mechanism (400) to drive the backrest (300) to change its working position.

3. The motorized sofa backrest adjustment mechanism of claim 1, wherein, The support (200) includes: Sofa seat (210); The first support frame (220) is fixedly installed on the sofa seat (210). The first support frame (220) is slidably installed on the support body (100) along the height direction of the support body (100).

4. The adjustable backrest mechanism of the electric sofa as described in claim 3, characterized in that: There are at least two first support frames (220).

5. The motorized sofa backrest adjustment mechanism of claim 3, wherein, The backrest (300) includes: Sofa back (310); The second support frame (320) is fixedly installed on the sofa back (310). The second support frame (320) is slidably installed on the support body (100) along the height direction of the support body (100).

6. The motorized sofa backrest adjustment mechanism of claim 5, wherein, The linkage mechanism (400) includes: A support rod (410) is rotatably mounted on the support body (100). The two ends of the support rod (410) are formed with elongated holes (401). The first support frame (220) and the second support frame (320) are slidably mounted in the elongated holes (401).

7. The motorized sofa backrest adjustment mechanism of claim 5, wherein, The sofa back (310) includes: The first sofa back (311) and the second support frame (320) are fixedly installed on the first sofa back (311); The second sofa back (312) is mounted on the top of the first sofa back (311) by a torsion spring, and the torsion direction of the second sofa back (312) is away from the support seat (200).

8. The adjustable backrest mechanism of the electric sofa as described in claim 7, characterized in that, The backrest (300) also includes: The limiting block (330) is fixedly installed on the second sofa back (312) and located on the side of the support body (100) near the bearing seat (200). When the limiting block (330) is in contact with the support body (100), the second sofa back (312) stops rotating relative to the first sofa back (311).

9. The adjustable backrest mechanism of the electric sofa as described in claim 7, characterized in that: When the backrest (300) is in its second working state, the second sofa back (312) is higher than the support seat (200) along the height direction of the support body (100).

10. The adjustable backrest mechanism of the electric sofa as described in claim 6, characterized in that, The linkage mechanism (400) also includes: A lubricating surface (420) is disposed within the elongated hole (401).

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