Electric sofa iron stand and electric sofa

Abstract

The utility model belongs to electric sofa technical field, concretely relates to an electric sofa iron stand and electric sofa, and the electric sofa iron stand includes: base, iron stand side plate is hinged on the base through first, second transmission rod, backrest iron stand is driven connection with iron stand side plate through connecting rod assembly, the connecting rod assembly includes a plurality of mutually hinged connecting rods, wherein, TV posture changes into lying posture, backrest iron stand is turned over to the rear relative to iron stand side plate, the connecting rod assembly generates synchronous contraction movement in the direction close to iron stand side plate, to drive backrest iron stand generates the compression displacement of leaning forward simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of electric sofa technology, and in particular relates to an electric sofa frame and an electric sofa. Background Technology

[0002] Electric sofas are an important piece of furniture in modern homes, and their comfort directly impacts the user experience. For more complex electric sofas, the internal metal frame serves as the core support and movement structure, making its design crucial.

[0003] Currently, most traditional electric sofa frames on the market use a simple flipping mechanism to adjust the backrest angle. When a user switches from a sitting to a reclining position, they pass through a TV position, and the backrest frame mainly performs a single backward flipping motion. This results in significant relative sliding friction between the user's back and the backrest surface, creating a strong "back-rubbing" sensation. This defect not only reduces comfort but also directly causes the user's clothing to be pulled upwards and rolled up by the backrest, seriously affecting the user experience.

[0004] Therefore, how to solve the problem of clothes being rolled up by the backrest friction during the flipping process of an electric sofa frame is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one electric sofa frame and an electric sofa.

[0007] In a first aspect, embodiments of this disclosure provide an electric sofa frame, including: a base; The iron frame side plate is hinged to the base via a first transmission rod and a second transmission rod; The backrest iron frame is connected to the side plate of the iron frame via a linkage assembly; The linkage assembly includes multiple hinged links; when the TV position changes to a reclining position, the backrest frame flips backward relative to the side plate of the frame, and the linkage assembly generates a synchronous contraction movement to drive the backrest frame to generate a forward tilting compression displacement.

[0008] In one optional embodiment, the lower part of the backrest frame is provided with a first hinge point and a second hinge point, and the fifth link and the fourth link in the linkage assembly are respectively hinged to the first hinge point and the second hinge point; wherein, when the linkage assembly retracts, it drives the first hinge point to rotate to below the second hinge point, so that the backrest frame forms an angle α with the horizontal plane and tilts forward in a compression displacement.

[0009] In one optional embodiment, the side panel frame includes a first mounting portion and a second mounting portion hinged to each other at their bottoms; a first link and a second link in the link assembly are respectively hinged to the first mounting portion and the second mounting portion; and the shafts of the first link and the second link are hinged to each other; wherein, when the first mounting portion rotates toward the backrest side about its hinge point C with the second mounting portion, the first link and the second link rotate about their shaft hinge point D, thereby causing the backrest frame to tilt forward and compress.

[0010] In one alternative embodiment, the linkage assembly includes a first link, a second link, a third link, a fourth link, and a fifth link; One end of the first connecting rod is hinged to the first mounting part, and the other end is hinged to one end of the third connecting rod. The other end of the third connecting rod is hinged to the rod body of the fourth connecting rod. One end of the second connecting rod is hinged to the second mounting portion, and its other end is hinged to one end of the fifth connecting rod, the other end of which is hinged to the first hinge point of the backrest frame; and, One end of the fourth link is hinged to the second hinge point of the backrest frame, and the other end is hinged to the body of the second link. When the first mounting part rotates around the hinge point C toward the backrest side, the hinge point between the second link and the fifth link rotates to below the hinge point between the second link and the second mounting part. The hinge point between the third and fourth links rotates to below the hinge point between the first and third links; This allows the linkage assembly to complete its retraction motion and synchronously drive the backrest frame to tilt forward and compress.

[0011] In one alternative implementation, when the linkage assembly moves, the first link and the second link intersect and form a scissor-like motion trajectory.

[0012] In one optional embodiment, the first mounting part is further provided with hinge point E, hinge point F and hinge point G; wherein, hinge point E is used to hinge the third transmission rod, hinge point F is used to hinge the first transmission rod and hinge point G is used to hinge the first connecting rod.

[0013] In one alternative implementation, during the transition from a sitting to a lying position, the horizontal relative displacement between a reference point A on the backrest frame and a reference point B on the base is not less than 255 mm.

[0014] In one optional implementation, the reference point A is the apex of the backrest frame; The reference point B is the hinge axis between the second transmission rod and the base.

[0015] In one optional implementation, in the lying position, the tilt angle α of the backrest frame is 15°~20°.

[0016] Secondly, this disclosure also provides an electric sofa, including: an electric sofa frame as described above, and a sofa cover covering the outside of the frame.

[0017] The beneficial effect of this utility model is that, through the specific design of the linkage assembly, the backrest frame of this electric sofa can simultaneously generate a forward compensating displacement when it flips back relative to the side panel, thereby eliminating relative sliding with the user's back. This not only eliminates the discomfort of back rubbing but also avoids the problem of clothing being rolled up.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A side view of an electric sofa frame in a seated position, provided in an embodiment of this disclosure; Figure 2 A side view of an electric sofa frame in a TV posture provided in an embodiment of this disclosure; Figure 3 A side view of an electric sofa frame in a reclining position, provided in an embodiment of this disclosure; Figure 4 This is a perspective view of the inner side of an electric sofa frame in a seated position, as provided in an embodiment of this disclosure.

[0022] In the picture: 100. Base; 110. First transmission rod; 120. Second transmission rod; 130. Third transmission rod; 200. Iron frame side plate; 210. First mounting part; 220. Second mounting part; 300. Link assembly; 310. First connecting rod; 320. Second connecting rod; 330. Third connecting rod; 340. Fourth connecting rod; 350. Fifth connecting rod; 400. Backrest iron frame; 410. First hinge point; 420. Second hinge point. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0026] Research has revealed shortcomings in existing technologies: Currently, most traditional electric sofa frames on the market use a simple flipping mechanism to adjust the backrest angle. When a user switches from a sitting or TV-like position to a reclining position, the backrest frame primarily performs a single backward flipping motion. During this process, the backrest only performs a single arc-shaped backward flipping motion around a fixed fulcrum, lacking effective horizontal forward displacement compensation. This results in significant relative sliding friction between the user's back and the backrest surface, creating a strong "back-rubbing" sensation. This defect not only reduces comfort but also directly causes the user's clothing to be pulled upwards and rolled up by the backrest, severely impacting the user experience.

[0027] Based on the above research, this disclosure provides an electric sofa frame that uses a hinged linkage mechanism between the side panel and the backrest to convert the backrest's backward tilting motion into the linkage mechanism's own retraction motion, thereby driving the backrest to generate a coordinated forward displacement while tilting backward, thus solving the aforementioned problem.

[0028] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] See Figure 1This disclosure provides an electric sofa frame, including: a base 100; a side plate 200, serving as the basic support structure for the entire frame, with the side plate 200 hinged to the base 100 via a first transmission rod 110 and a second transmission rod 120, allowing relative movement between the side plate and the base 100. A backrest frame 400 is connected to the side plate 200 via a linkage assembly 300. The linkage assembly 300 includes multiple hinged links, forming a multi-degree-of-freedom linkage mechanism; when the frame transitions from a TV position to a reclining position, the linkage assembly 300 generates a synchronous contraction movement. This kinematic characteristic allows the backrest frame 400 to simultaneously generate a significant forward horizontal compensation displacement relative to the fixed base 100 while flipping backward. This composite motion trajectory ensures that the user's back remains in close contact with the sofa backrest, thereby eliminating relative slippage between them. This not only completely solves the discomfort caused by "back rubbing", but also avoids the problem of clothes being rolled up, greatly improving the comfort of lying down.

[0032] See also Figure 1 In some embodiments, the lower part of the backrest frame 400 is provided with a first hinge point 410 and a second hinge point 420. One end of the first link 310 in the linkage assembly 300 is hinged to the first hinge point 410, and one end of the second link 320 is hinged to the second hinge point 420. This double hinge point design enables linkage between the backrest frame 400 and the linkage assembly 300. When an external drive is applied to the linkage assembly 300, the power is transmitted through the linkage assembly 300 and drives the backrest frame 400 via the first hinge point 410 and the second hinge point 420. Specifically, when the linkage assembly 300 retracts, it causes the first hinge point 410 to rotate below the second hinge point 420, so that the backrest frame 400 forms an angle α with the horizontal plane and tilts forward in a compressive displacement.

[0033] See Figure 1 , Figure 2 and Figure 3In some embodiments, the iron frame side plate 200 includes a first mounting portion 210 and a second mounting portion 220 hinged to each other at their bottom, the first mounting portion 210 being rotatable relative to the second mounting portion 220. The linkage assembly 300 includes a first link 310, a second link 320, a third link 330, a fourth link 340, and a fifth link 350. The connection relationships between the links are as follows: one end of the first link 310 is hinged to the first mounting part 210, and the other end is hinged to one end of the third link 330, the other end of the third link 330 is hinged to the body of the fourth link 340; one end of the second link 320 is hinged to the second mounting part 220, and the other end is hinged to one end of the fifth link 350, the other end of the fifth link 350 is hinged to the first hinge point 410 of the backrest frame 400; one end of the fourth link 340 is hinged to the second hinge point 420 of the backrest frame 400, and the other end is hinged to the body of the second link 320; and the bodies of the first link 310 and the second link 320 are hinged to each other in the middle to form a core linkage pivot. During the process of the frame transitioning from a TV position to a reclining position, as the first mounting part 210 and the second mounting part 220 move, the first mounting part 210 rotates around hinge point C toward the backrest side, gradually increasing the distance between hinge point C and hinge point D. This change in distance is transmitted and converted through the linkage assembly 300: on the one hand, when the linkage assembly 300 retracts, the hinge point between the second link 320 and the fifth link 350 rotates to below the hinge point between the second link 320 and the second mounting part 220, so as to... The fifth link 350 pushes the backrest frame 400 to flip backward around the first hinge point 410, achieving a reclining posture. Simultaneously, through the coordinated action of the third link 330 and the fourth link 340, when the hinge point of the third link 330 and the fourth link 340 rotates below the hinge point of the first link 310 and the third link 330, the link assembly 300 completes a retraction motion. This allows the backrest frame 400 to generate a forward tilting horizontal displacement (i.e., compensating displacement) while flipping backward. During the transition from the TV posture to the reclining posture, the movement trajectory of the backrest frame 400 is a synthesis of backward flipping and forward translation. This unique kinematic design effectively eliminates the "back-rubbing" discomfort common in traditional reclining mechanisms and avoids the problem of clothing being rolled up, greatly improving user comfort.

[0034] See Figure 4In some embodiments, the first mounting portion 210 is located inside the iron frame side plate 200, while the second mounting portion 220 is located outside. The outline of the first mounting portion 210 is approximately triangular, forming a power transmission hub. The first mounting portion 210 is also provided with hinge points E, F, and G; wherein, hinge point E is used to hinge the third transmission rod 130, thereby receiving power from the transmission rod. Hinge point F is used to hinge the first transmission rod 110, and hinge point G is used to hinge the corner of the first connecting rod 310 located on one side of the triangle to the third transmission rod 130, thereby receiving power from the transmission rod.

[0035] See Figure 1 and Figure 3 In some embodiments, during the transition from a sitting to a reclining position, the horizontal relative displacement between a reference point A on the backrest frame 400 and a reference point B on the base 100 is not less than 255 mm. Specifically, reference point A is the apex of the backrest frame 400; reference point B is the hinge axis between the second transmission rod 120 and the base 100. This displacement distance is a direct result of comprehensive optimization of the lengths of the members and the hinge point positions in the linkage assembly 300. It ensures that even when the backrest frame 400 is reclined at a large angle, the backrest can produce a significant forward compensating displacement, creating a spacious and comfortable reclining experience for the user.

[0036] See Figure 3 In some embodiments, when the mechanism is in a reclining position, the backrest frame 400 forms an angle α with the horizontal direction. Preferably, the angle α is controlled between 15° and 20°. This ergonomically optimized angle range, in conjunction with the forward compensating displacement generated by the linkage assembly 300, works together to moderately shift the user's center of gravity backward, providing even support for the waist and back, effectively eliminating chest pressure and improving user comfort.

[0037] Some embodiments also provide an electric sofa. The electric sofa includes the electric sofa frame described in detail in any of the above embodiments as its core support and motion skeleton, and a soft sofa cover (such as sponge, fabric or leather) covering the outside of the frame.

[0038] In summary, the electric sofa frame and electric sofa provided in this disclosure, through the design of a linkage assembly 300 with a specific structure, cleverly achieve a significant forward compensating displacement simultaneously when the backrest frame 400 tilts backward, thereby eliminating the relative sliding between the backrest and the user's back. This composite motion track solves the "back rubbing" and "clothes rolling" problems existing in traditional electric sofas. Furthermore, by optimizing the installation structure, quantifying key motion parameters (minimum compensating displacement not less than 255mm), and setting the optimal reclining angle range (15°~20°), the comfort of the product is further improved.

[0039] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0041] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0042] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric sofa frame, characterized in that, include: Base (100); The iron frame side plate (200) is hinged to the base (100) via the first transmission rod (110) and the second transmission rod (120); The backrest frame (400) is connected to the side plate (200) of the frame via a linkage assembly (300); The linkage assembly (300) includes a plurality of links that are hinged to each other; When the TV posture changes to a reclining posture, the backrest frame (400) flips backward relative to the side plate (200), and the linkage assembly (300) generates a synchronous contraction movement in the direction closer to the side plate (200) to drive the backrest frame (400) to generate a forward tilting compression displacement.

2. The electric sofa frame as described in claim 1, characterized in that, The lower part of the backrest frame (400) is provided with a first hinge point (410) and a second hinge point (420). The fifth link (350) and the fourth link (340) in the link assembly (300) are respectively hinged to the first hinge point (410) and the second hinge point (420). When the link assembly (300) retracts, it drives the first hinge point (410) to rotate below the second hinge point (420), so that the backrest frame (400) forms an angle α with the horizontal plane and tilts forward to compress displacement.

3. The electric sofa frame as described in claim 2, characterized in that, The iron frame side plate (200) includes a first mounting part (210) and a second mounting part (220) that are hinged to each other at the bottom. The first connecting rod (310) and the second connecting rod (320) in the connecting rod assembly (300) are respectively hinged to the first mounting part (210) and the second mounting part (220), and the rod bodies of the first connecting rod (310) and the second connecting rod (320) are hinged to each other. When the first mounting part (210) rotates toward the backrest side around the hinge point C between itself and the second mounting part (220), the first connecting rod (310) and the second connecting rod (320) rotate around the hinge point D of their rod bodies, thereby causing the backrest iron frame (400) to tilt and compress forward.

4. The electric sofa frame as described in claim 3, characterized in that, The link assembly (300) includes a first link (310), a second link (320), a third link (330), a fourth link (340), and a fifth link (350). One end of the first connecting rod (310) is hinged to the first mounting part (210), and the other end is hinged to one end of the third connecting rod (330). The other end of the third connecting rod (330) is hinged to the rod body of the fourth connecting rod (340). One end of the second connecting rod (320) is hinged to the second mounting part (220), and the other end is hinged to one end of the fifth connecting rod (350), the other end of which is hinged to the first hinge point (410) of the backrest frame (400); and, One end of the fourth link (340) is hinged to the second hinge point (420) of the backrest frame (400), and the other end is hinged to the body of the second link (320). When the first mounting part (210) rotates around the hinge point C toward the backrest side, the hinge point of the second link (320) and the fifth link (350) rotates to below the hinge point of the second link (320) and the second mounting part (220); The hinge point of the third link (330) and the fourth link (340) rotates to below the hinge point of the first link (310) and the third link (330); This causes the linkage assembly (300) to complete the retraction motion and synchronously drive the backrest frame (400) to tilt forward and compress.

5. The electric sofa frame as described in claim 4, characterized in that, When the linkage assembly (300) moves, the first link (310) and the second link (320) are hinged to form a scissor-like motion trajectory.

6. The electric sofa frame as described in claim 4, characterized in that, The first mounting part (210) is also provided with hinge point E, hinge point F and hinge point G; wherein, hinge point E is used to hinge the third transmission rod (130), hinge point F is used to hinge the first transmission rod (110) and hinge point G is used to hinge the first connecting rod (310).

7. The electric sofa frame as described in claim 1, characterized in that, During the transition from a sitting to a lying position, the horizontal relative displacement between a reference point A on the backrest frame (400) and a reference point B on the base (100) is not less than 255 mm.

8. The electric sofa frame as described in claim 7, characterized in that, The reference point A is the apex of the backrest frame (400); The reference point B is the hinge axis between the second transmission rod (120) and the base (100).

9. The electric sofa frame as described in claim 2, characterized in that, In the lying position, the tilt angle α formed by the backrest iron frame (400) and the horizontal plane is 15°~20°.

10. An electric sofa, characterized in that, Includes the electric sofa frame as described in any one of claims 1 to 9, and a sofa cover covering the outside of the frame.

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