Leg stretching device and low-leg sofa

Abstract

The utility model provides a leg stretching device and a low-leg sofa. The leg stretching device comprises a connecting rod assembly which can be stretched or contracted; at least one part of the movable assembly is arranged in an extensible or retractable manner; one end of the connecting rod assembly is connected with the first footrest assembly, the second footrest assembly is connected with the first footrest assembly through the movable assembly, and at least the other part of the movable assembly is fixedly connected with the connecting rod assembly, so that the first footrest assembly is driven to move to a first preset position when the connecting rod assembly stretches or retracts; and at least one part of the movable assembly is stretched or contracted to drive the second footrest assembly to move to a second preset position, so that the problem that the leg stretching device in the prior art is poor in overall structural stability, and consequently the legs of the user are unstably supported is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of extension structures of functional furniture, in particular to a leg extension device and a low-leg sofa. Background Art

[0002] At present, functional sofas can smoothly transform between sitting, leisure and lying positions to meet the requirements of sitting, leisure and sleeping. Usually, functional sofas have structures such as backrest, seat and footrest. When the functional sofa changes from sitting to leisure position, its footrest mechanism slowly stretches forward and upward to support and relax the legs of the person; when the functional sofa changes from leisure position to lying position, the footrest mechanism remains in the extended state, the backrest moves backward, and the functional sofa is fully extended to meet the requirements of lying.

[0003] In response to the requirements of consumers and the market, functional sofas have different styles. One of the differences in their styles is the height of the feet. High-legged sofas and low-legged sofas (also called short-legged sofas) each have their own unique advantages and disadvantages; high-legged sofas have a good visual sense of space and are easy to clean and sweep, while low-legged sofas are more stable, comfortable and easy to integrate into the environment. Another difference in their styles is the size of the footrest on the footrest mechanism. Common footrests include single footrests and multiple footrests. As the name suggests, a single footrest is a single large footrest, and a multiple footrest usually includes a single large footrest and several small footrests, thereby increasing the overall footrest area to enhance the comfort of the sofa.

[0004] However, most of the existing footrest mechanisms use a single footrest, in which the single footrest and multiple connecting rods of the connecting rod mechanism are rotatably connected to each other, so that when the footrest mechanism switches from a retracted state to an extended state, the multiple connecting rods of the connecting rod mechanism are unfolded and connected to each other. Since the connection points of the multiple connecting rods are all rotatable connections, it is easy to cause the stability of the overall structure to be difficult to support the user's legs when the footrest mechanism is retracted and extended to the extreme state. Utility Model Content

[0005] The main purpose of the utility model is to provide a leg stretching device and a low-leg sofa, so as to solve the problem that the overall structural stability of the leg stretching device in the prior art is poor, resulting in unstable support for the user's legs.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a leg extension device is provided, including: a connecting rod assembly, which can be extended or contracted; a movable assembly, at least a part of which can be extended or contracted; a first footrest assembly and a second footrest assembly, one end of the connecting rod assembly is connected to the first footrest assembly, the second footrest assembly is connected to the first footrest assembly through the movable assembly, and at least another part of the movable assembly is fixedly connected to the connecting rod assembly, so that when the connecting rod assembly is extended or contracted, the first footrest assembly is driven to move to a first preset position, and at least a part of the movable assembly is extended or contracted to drive the second footrest assembly to move to a second preset position.

[0007] Furthermore, when the first footrest assembly and the second footrest assembly move from an extended state to a retracted state, a first angle L1 is formed between the first preset position and the second preset position; wherein the first angle L1 satisfies: 20°≤L1≤40°.

[0008] Furthermore, the movable component includes: a fixed part, one end of which is fixedly connected to the connecting rod assembly; a movable part, which is movably connected to the other end of the fixed part, and one end of the movable part away from the fixed part is connected to the second footrest assembly, so that the second footrest assembly can be movably arranged relative to the connecting rod assembly.

[0009] Furthermore, a slide groove is provided on the fixed part, and a guide portion is provided on the relatively distant end of the movable part. The guide portion extends into the slide groove and is movably arranged along the extension direction of the slide groove. The movable part is rotatably connected to the first footrest assembly near the guide portion, so that when the movable part moves to the retracted state, it drives the second footrest assembly to move.

[0010] Furthermore, the fixing member includes a first fixing plate segment and a second fixing plate segment, the first fixing plate segment and the second fixing plate segment are arranged at a second angle, the slide groove is arranged on the first fixing plate segment, and the second fixing plate segment is fixedly connected to the connecting rod assembly; wherein the second angle L2 satisfies: 110°≤L2≤120°.

[0011] Furthermore, the movable component also includes a linkage, the two ends of which are respectively connected to the first footrest assembly and the second footrest assembly, so that when the second footrest assembly is extended or contracted, the second footrest assembly moves relative to the first footrest assembly within a fixed position range.

[0012] Furthermore, the connecting rod assembly includes two groups of staggered connecting rod members, one group of connecting rod members includes a first connecting rod and a second connecting rod connected to each other, and the other group of connecting rod members includes a third connecting rod and a fourth connecting rod connected to each other, the first connecting rod and the second connecting rod are arranged at a third angle with the third connecting rod and the fourth connecting rod, one end of the first connecting rod and the third connecting rod are respectively connected to the first footrest assembly, and the second connecting rod and the third connecting rod are rotatably connected.

[0013] Furthermore, the first footrest assembly includes a first main body connected to the connecting rod assembly; the second footrest assembly includes a second main body connected to the movable assembly; the connecting rod assembly and the movable assembly are detachably connected.

[0014] Furthermore, the first main body member includes a first main body plate segment and a second main body plate segment detachably connected to each other, at least a portion of the movable assembly is connected to the first main body plate segment, and the connecting rod assembly is connected to the second main body plate segment.

[0015] According to another aspect of the utility model, a low-legged sofa is provided, comprising: the leg stretching device mentioned above; a base frame connected to the leg stretching device, a second connecting rod and a fourth connecting rod respectively rotatably connected to the base frame, so that when the first footrest assembly is in a retracted state, a fourth angle is formed between the end surface of the base frame facing the user's legs and the end surface of the first footrest assembly facing the user's legs.

[0016] By applying the technical solution of the utility model, the leg extension device includes a connecting rod assembly, a movable assembly, a first footrest assembly and a second footrest assembly; the connecting rod assembly can be extended or contracted; at least a part of the movable assembly can be extended or contracted; one end of the connecting rod assembly is connected to the first footrest assembly, the second footrest assembly is connected to the first footrest assembly through the movable assembly, and at least another part of the movable assembly is fixedly connected to the connecting rod assembly, so that when the connecting rod assembly is extended or contracted, the first footrest assembly is driven to move to the first preset position, and at least a part of the movable assembly is extended or contracted to drive the second footrest assembly to move to the second preset position. In this way, when the connecting rod assembly is extended or contracted after a driving force is applied to the connecting rod assembly by an external driver, the first footrest assembly is driven to move to the first preset position. At the same time, since at least another part of the movable assembly is fixedly connected to the connecting rod assembly, when the connecting rod assembly is extended or contracted, at least a part of the movable assembly is extended or contracted to drive the second footrest assembly to move to the second preset position, so that the connection of the overall structure of the leg extension device is more stable, and the operation is smoother when switching between the extended state and the contracted state, and the support force for the user's legs in the extended state is better and the tightening force in the contracted state is tighter, so as to achieve stable support for the user's legs, thereby solving the problem of poor overall structural stability of the leg extension device in the prior art, resulting in unstable support for the user's legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1The figure shows the overall structure of the leg stretching device provided in the embodiment of the utility model in the stretching state;

[0019] Figure 2 The figure shows the overall structure of the leg stretching device provided in the embodiment of the utility model during the process of switching from the stretching state to the contracting state;

[0020] Figure 3 The figure shows the overall structure of the leg stretching device in the contracted state according to the embodiment of the utility model.

[0021] The above drawings include the following reference numerals:

[0022] 10. Connecting rod assembly; 11. First connecting rod; 12. Second connecting rod; 13. Third connecting rod; 14. Fourth connecting rod; 20. Movable assembly; 21. Fixing member; 210. Slide groove; 211. First fixing plate section; 212. Second fixing plate section; 22. Movable member; 221. Guide portion; 23. Connecting member; 30. First footrest assembly; 31. First main body member; 310. First main body plate section; 311. Second main body plate section; 32. First footrest member; 40. Second footrest assembly; 41. Second main body member; 42. Second footrest member; 50. Base frame. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to solve the problem that the overall structural stability of the leg stretching device in the prior art is poor, resulting in unstable support for the user's legs, the utility model provides a leg stretching device and a low-leg sofa.

[0025] Please refer to Figures 1 to 3 As shown, one aspect of the technical solution of the utility model is applied, the leg extension device includes a connecting rod assembly 10, a movable assembly 20, a first footrest assembly 30 and a second footrest assembly 40; the connecting rod assembly 10 is configured to be extendable or retractable; at least a part of the movable assembly 20 is configured to be extendable or retractable; one end of the connecting rod assembly 10 is connected to the first footrest assembly 30, the second footrest assembly 40 is connected to the first footrest assembly 30 through the movable assembly 20, and at least another part of the movable assembly 20 is fixedly connected to the connecting rod assembly 10, so that when the connecting rod assembly 10 is extended or retracted, it drives the first footrest assembly 30 to move to the first preset position, and at least a part of the movable assembly 20 is extended or retracted to drive the second footrest assembly 40 to move to the second preset position.

[0026] By applying the technical solution of this embodiment, when the connecting rod assembly 10 is extended or contracted after a driving force is applied to the connecting rod assembly 10 by an external driver, the first footrest assembly 30 is driven to move to the first preset position. At the same time, since at least another part of the movable assembly 20 is fixedly connected to the connecting rod assembly 10, when the connecting rod assembly 10 is extended or contracted, at least a part of the movable assembly 20 is extended or contracted to drive the second footrest assembly 40 to move to the second preset position, so that the connection of the overall structure of the leg extension device is more stable, and the operation is smoother when switching between the extended state and the contracted state, and the support force for the user's legs in the extended state is better and the tightening force in the contracted state is tighter, so as to achieve stable support for the user's legs, thereby solving the problem of poor overall structural stability of the leg extension device in the prior art, resulting in unstable support for the user's legs.

[0027] Specifically, the movable assembly 20 includes a fixed member 21 and a movable member 22; wherein one end of the fixed member 21 is fixedly connected to the connecting rod assembly 10; the movable member 22 is movably connected to the other end of the fixed member 21, and one end of the movable member 22 away from the fixed member 21 is connected to the second footrest assembly 40, so that the second footrest assembly 40 is movably arranged relative to the connecting rod assembly 10. In this way, when the connecting rod assembly 10 is extended or retracted after the driving force is applied to the connecting rod assembly 10 by an external driver, the first footrest assembly 30 moves to the first preset position, and the connecting rod assembly 10 simultaneously drives the fixed member 21 to move, thereby causing the movable member 22 to extend or retract, thereby driving the second footrest assembly 40 to move to the second preset position, and the connection between the connecting rod assembly 10 and the fixed member 21 of the movable assembly 20 is more stable, and the user's legs can be stably supported, and the overall structure operates smoothly during the extension and retraction process.

[0028] In this embodiment, when the first footrest assembly and the second footrest assembly move from the extended state to the retracted state, the first preset position and the second preset position are set at a first angle; wherein the first angle L1 satisfies: 20°≤L1≤40°. Preferably, the first footrest assembly 30 and the second footrest assembly 40 are set at 30°, so that when the first footrest assembly 30 and the second footrest assembly 40 are both in the extreme retracted state, the first footrest assembly 30 or the second footrest assembly 40 can be prevented from rubbing against the ground.

[0029] In order to make the movable member 22 extendable or retractable relative to the fixed member 21, a slide groove 210 is provided on the fixed member 21, and a guide portion 221 is provided on the relatively far end of the movable member 22, and the guide portion 221 extends into the slide groove 210 and is movably provided along the extension direction of the slide groove 210. The movable member 22 is rotatably connected to the first footrest assembly 30 near the guide portion 221, so that when the movable member 22 moves to the retracted state, it drives the second footrest assembly 40 to move. In this way, after the driving force is applied to the connecting rod assembly 10 by the external driver, the connecting rod assembly 10 is extended or retracted to the limit state, and at the same time, the connecting rod assembly 10 drives the fixed member 21 to move to the third preset position, and the guide portion 221 on the movable member 22 of the movable assembly 20 slides in the slide groove 210 on the fixed member 21 and rotates at the same time to extend or retract, thereby driving the second footrest assembly 40 to move to the second preset position, and the overall structure operates smoothly and is stable.

[0030] In this embodiment, when the movable part 22 moves relative to the fixed part 21, the force-bearing part between the movable part 22 and the fixed part 21 is on the contact surface between the guide portion 221 and the slide groove 210. As the guide portion 221 continuously slides and rotates in the slide groove 210, the force-bearing position continuously changes, so that the wear position between the movable part 22 and the fixed part 21 also continuously changes, thereby greatly improving the service life of the movable component 20.

[0031] Specifically, the fixing member 21 includes a first fixing plate segment 211 and a second fixing plate segment 212, the first fixing plate segment 211 and the second fixing plate segment 212 are arranged at a second angle, the slide groove 210 is arranged on the first fixing plate segment 211, and the second fixing plate segment 212 is fixedly connected to the connecting rod assembly 10; wherein, the second angle L2 satisfies: 110°≤L2≤120°. With the above arrangement, in this embodiment, the fixing member 21 is in a V-shaped structure, and the first fixing plate segment 211 and the second fixing plate segment 212 are arranged at a second angle, so that when the connecting rod assembly 10 is extended or contracted to the limit state, it is convenient for the movable member 22 to move to the limit extension state or contraction state relative to the fixing member 21.

[0032] like Figures 1 to 3As shown, the movable assembly 20 further includes a linkage 23, and the two ends of the linkage 23 are respectively connected to the first footrest assembly 30 and the second footrest assembly 40, so that when the second footrest assembly 40 is extended or contracted, the second footrest assembly 40 moves relative to the first footrest assembly 30 within a fixed position range. In this way, when the connecting rod assembly 10 is extended or contracted, the movable member 22 is extended or contracted relative to the fixed member 21, and because the linkage 23 is respectively connected to the first footrest assembly 30 and the second footrest assembly 40, and a planar four-bar linkage structure is formed between the movable member 22, the second main body 41, the linkage 23 and the first main body 31, the second footrest assembly 40 is moved relative to the first footrest assembly 30 within a fixed position range and moves to the second preset position.

[0033] Specifically, the connecting rod assembly 10 includes two groups of staggered connecting rod members, one group of connecting rod members includes a first connecting rod 11 and a second connecting rod 12 connected to each other, and the other group of connecting rod members includes a third connecting rod 13 and a fourth connecting rod 14 connected to each other. The first connecting rod 11 and the second connecting rod 12 are arranged at a third angle with the third connecting rod 13 and the fourth connecting rod 14. One end of the first connecting rod 11 and the third connecting rod 13 are respectively connected to the first footrest assembly 30, and the second connecting rod 12 and the third connecting rod 13 are rotatably connected. In the above arrangement, the third angle L3 satisfies: 30°≤L3≤120°, and both sets of connecting rods are planar four-bar structures. In this way, when the connecting rod assembly 10 is extended or contracted after a driving force is applied to the connecting rod assembly 10 by an external driver, the first connecting rod 11 and the third connecting rod 13 are infinitely close to being parallel to the second connecting rod 12 and the fourth connecting rod 14 respectively, and when the connecting rod assembly 10 moves to an extended state, the first footrest assembly 30 and the second footrest assembly 40 are infinitely close to being parallel, and the overall structure is stable, and drives the fixing member 21 to operate smoothly.

[0034] In this embodiment, the first connecting rod 11 is hinged to the second connecting rod 12, the second connecting rod 12 is hinged to the base frame 50, the third connecting rod 13 is hinged to the fourth connecting rod 14, and the fourth connecting rod 14 is hinged to the base frame 50; the fixing member 21 is fixedly connected to the first connecting rod 11, and the connection method is not limited, and can be riveted, bolted, welded, etc.

[0035] It should be noted that, in this embodiment, the number of connecting rod groups is not limited thereto, and can be selected accordingly according to usage requirements and actual working conditions. Optionally, the connecting rod groups are one group, two groups, three groups, four groups, five groups, or more groups.

[0036] Specifically, the first footrest assembly 30 includes a first main body 31, which is connected to the connecting rod assembly 10; the second footrest assembly 40 includes a second main body 41, which is connected to the movable assembly 20; wherein the connecting rod assembly 10 and the movable assembly 20 are detachably connected. In the above configuration, the first main body 31 is provided with a first footrest 32, and the second main body 41 is provided with a second footrest 42. Both the first footrest 32 and the second footrest 42 are soft-covered boards and are respectively used to contact and support the user's legs, so that after the first footrest 32 and the second footrest 42 are respectively contracted to the limit state, the first footrest 32 and the second footrest 42 are arranged at a first angle to prevent the first footrest 32 or the second footrest 42 from rubbing against the ground.

[0037] In this embodiment, the connecting rod assembly 10 and the first footrest assembly 30 are detachably connected by bolts, self-tapping screws or other means.

[0038] Optionally, the fixed part 21 and the first connecting rod 11 of the connecting rod assembly 10, the connecting part 23 and the first main part 31, and the movable part 22 and the first main part 31 are detachably connected by bolts or self-tapping screws, so that the fixed part 21 can be removed and replaced or repaired after being worn for a long time. At the same time, the connecting part 23 and the movable part 22 can also be removed and replaced or repaired. A detachable connection is achieved between the movable component 20 and the second footrest component 40 to facilitate function selection when installing the leg extension device. Specifically, when multiple footrests need to be installed, the movable component 20 and the second footrest component 40 are installed; when a single footrest is needed, the movable component 20 and the second footrest component 40 are both removed.

[0039] Optionally, the first main body member 31 includes a first main body plate section 310 and a second main body plate section 311 which are detachably connected to each other, at least a portion of the movable assembly 20 is connected to the first main body plate section 310, and the connecting rod assembly 10 is connected to the second main body plate section 311. In the above arrangement, the fixing member 21 is detachably connected to the first connecting rod 11 of the connecting rod assembly 10, and the hinge point between the movable member 22 and the first main body member 31 is located on the first main body plate section. In this way, by disassembling the first main body plate section 310 and the second main body plate section 311, the movable member 22, the connecting member 23, and the second footrest assembly 40 can be disassembled to facilitate subsequent replacement or repair thereof.

[0040] Specifically, the leg extension device further includes a base frame 50, and the second connecting rod 12 and the fourth connecting rod 14 are rotatably connected to the base frame 50, so that when the first footrest assembly 30 is in the retracted state, the end surface of the base frame 50 facing the user's legs and the end surface of the first footrest assembly 30 facing the user's legs form a fourth angle; wherein the fourth angle L4 satisfies: 80°≤L4≤90°. In this way, when the first footrest assembly 30 is retracted to the limit state, the fourth angle is infinitely close to 80°, and when the first footrest assembly 30 is extended to the limit state, the fourth angle is infinitely close to 180°.

[0041] Another aspect of the technical solution of the utility model provides a low-legged sofa, including the leg stretching device and a base frame 50 mentioned above, the base frame 50 is connected to the leg stretching device, and the second connecting rod and the fourth connecting rod are rotatably connected to the base frame respectively, so that when the first footrest assembly is in a retracted state, the end face of the base frame facing the user's legs and the end face of the first footrest assembly facing the user's legs are arranged at a fourth angle. In the above arrangement, the fourth angle L4 satisfies: 80°≤L4≤90°, so that when the first footrest assembly 30 is retracted to the limit state, the fourth angle is infinitely close to 80°, and when the first footrest assembly 30 is extended to the limit state, the fourth angle is infinitely close to 180°.

[0042] In this embodiment, when the first footrest assembly is in the retracted state, the minimum distance between the first footrest member 32 and the ground is 50 mm, and the distance from the ground to 120 mm is generally a medium-high sofa, and any component of the leg extension device will not rub the ground during the extension or retraction process, and the space occupied during the entire transformation process is small, and the overall structure is more compact and compact; at the same time, it can be referred to Figures 1 to 3 As shown, when the first footrest assembly 30 and the second footrest assembly 40 are both in the retracted state, the second footrest member 42 is folded behind the first footrest member 32, and the lowest point of the first footrest member 32 is lower than the lowest point of the second footrest member 42, and then the second footrest member 42 is completely hidden after it is retracted to the extreme state, which is more beautiful and practical to use.

[0043] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0044] The leg extension device includes a connecting rod assembly, a movable assembly, a first footrest assembly and a second footrest assembly; the connecting rod assembly is extendable or retractable; at least a part of the movable assembly is extendable or retractable; one end of the connecting rod assembly is connected to the first footrest assembly, the second footrest assembly is connected to the first footrest assembly through the movable assembly, and at least another part of the movable assembly is fixedly connected to the connecting rod assembly, so that when the connecting rod assembly is extended or retracted, the first footrest assembly is driven to move to a first preset position, and at least a part of the movable assembly is extended or retracted to drive the second footrest assembly to move to a second preset position. In this way, when the connecting rod assembly is extended or contracted after a driving force is applied to the connecting rod assembly by an external driver, the first footrest assembly is driven to move to the first preset position. At the same time, since at least another part of the movable assembly is fixedly connected to the connecting rod assembly, when the connecting rod assembly is extended or contracted, at least a part of the movable assembly is extended or contracted to drive the second footrest assembly to move to the second preset position, so that the connection of the overall structure of the leg extension device is more stable, and the operation is smoother when switching between the extended state and the contracted state, and the support force for the user's legs in the extended state is better and the tightening force in the contracted state is tighter, so as to achieve stable support for the user's legs, thereby solving the problem of poor overall structural stability of the leg extension device in the prior art, resulting in unstable support for the user's legs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A leg stretching device, characterized in that: include: A connecting rod assembly (10) is arranged to be extendable or retractable; A movable component (20), at least a portion of which is arranged to be extendable or retractable; A first footrest assembly (30) and a second footrest assembly (40), one end of the connecting rod assembly (10) is connected to the first footrest assembly (30), the second footrest assembly (40) is connected to the first footrest assembly (30) via the movable assembly (20), at least another part of the movable assembly (20) is fixedly connected to the connecting rod assembly (10), so that when the connecting rod assembly (10) is extended or contracted, it drives the first footrest assembly (30) to move to a first preset position, and at least a part of the movable assembly (20) is extended or contracted to drive the second footrest assembly (40) to move to a second preset position.

2. The leg stretching device according to claim 1, characterized in that: When the first footrest assembly (30) and the second footrest assembly (40) move from an extended state to a retracted state, the first preset position and the second preset position are arranged at a first angle; wherein the first angle L1 satisfies: 20°≤L1≤40°.

3. The leg stretching device according to claim 1, characterized in that: The movable component (20) comprises: A fixing member (21), one end of which is fixedly connected to the connecting rod assembly (10); The movable member (22) is movably connected to the other end of the fixed member (21), and one end of the movable member (22) away from the fixed member (21) is connected to the second footrest assembly (40), so that the second footrest assembly (40) can be movably arranged relative to the connecting rod assembly (10).

4. The leg stretching device according to claim 3, characterized in that: The fixing member (21) is provided with a slide groove (210), and a guide portion (221) is provided on the relatively distant end of the movable member (22). The guide portion (221) extends into the slide groove (210) and is movably arranged along the extension direction of the slide groove (210). The movable member (22) is rotatably connected to the first footrest assembly (30) near the guide portion (221), so that the second footrest assembly (40) can be movably arranged relative to the connecting rod assembly (10).

5. The leg stretching device according to claim 4, characterized in that: The fixing member (21) comprises a first fixing plate segment (211) and a second fixing plate segment (212); the first fixing plate segment (211) and the second fixing plate segment (212) are arranged at a second angle; the sliding groove (210) is arranged on the first fixing plate segment (211); and the second fixing plate segment (212) is fixedly connected to the connecting rod assembly (10); wherein the second angle L2 satisfies: 110°≤L2≤120°.

6. The leg stretching device according to claim 3, characterized in that: The movable component (20) further comprises a linkage (23), the two ends of which are respectively connected to the first footrest component (30) and the second footrest component (40), so that when the second footrest component (40) is extended or contracted, the second footrest component (40) moves relative to the first footrest component (30) within a fixed position range.

7. The leg stretching device according to claim 1, characterized in that: The connecting rod assembly (10) comprises two groups of connecting rod members arranged in an alternating manner, one group of the connecting rod members comprises a first connecting rod (11) and a second connecting rod (12) connected to each other, and the other group of the connecting rod members comprises a third connecting rod (13) and a fourth connecting rod (14) connected to each other, the first connecting rod (11) and the second connecting rod (12) are arranged at a third angle with the third connecting rod (13) and the fourth connecting rod (14), one end of the first connecting rod (11) and the third connecting rod (13) are respectively connected to the first footrest assembly (30), and the second connecting rod (12) and the third connecting rod (13) are rotatably connected.

8. The leg stretching device according to claim 1, characterized in that: The first footrest assembly (30) comprises a first main body (31), and the first main body (31) is connected to the connecting rod assembly (10); The second footrest assembly (40) comprises a second main body (41), and the second main body (41) is connected to the movable assembly (20); wherein the connecting rod assembly (10) and the movable assembly (20) are detachably connected.

9. The leg stretching device according to claim 8, characterized in that: The first main body member (31) includes a first main body plate segment (310) and a second main body plate segment (311) which are detachably connected to each other, at least a portion of the movable component (20) is connected to the first main body plate segment (310), and the connecting rod component (10) is connected to the second main body plate segment (311).

10. A low-leg sofa, characterized in that: include: The leg extension device according to any one of claims 1 to 9; A base frame (50) is connected to the leg extension device, and the second connecting rod (12) and the fourth connecting rod (14) are respectively rotatably connected to the base frame (50), so that when the first footrest assembly (30) is in a retracted state, the end surface of the base frame (50) facing the user's legs and the end surface of the first footrest assembly (30) facing the user's legs are arranged at a fourth angle.

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