Footrest mechanism and sofa

Abstract

This invention discloses a footrest mechanism and a sofa: It includes a footrest support frame connected to a leg support frame via a multi-link mechanism. The leg support frame has a folded position and an extended position, while the footrest support frame has a folded position close to the leg support frame and a supporting position away from the leg support frame. When the leg support frame is in the folded position, the footrest support frame can rotate 85-95 degrees from the folded position to the first supporting position; when the leg support frame is in the extended position, the footrest support frame can rotate 170-185 degrees from the folded position to the second supporting position. Because the sofa uses the aforementioned footrest support frame, when the leg support frame is rotated upwards to a reclining position, the footrest can further adjust according to the user's leg posture, thereby providing better support for the user's feet.

Description

Technical Field

[0001] This application relates to the field of sofa technology, specifically to a footrest mechanism and a sofa. Background Technology

[0002] Sofas help people relax and relieve physical fatigue. Common sofas, such as lounge sofas or electric sofas, generally have two usage modes: sitting and reclining. In the sitting mode, both feet are on the ground with the lower legs bent and roughly perpendicular to the ground; in the reclining mode, the legs are roughly horizontal, allowing the user to be in a more comfortable position and get better rest.

[0003] The sofa in this technology includes a seat support frame, armrests connected to both sides of the seat support frame, a backrest support frame located at the rear end of the seat support frame, and a leg support frame connected to the front end of the seat support frame. The sofa also includes a footrest with a sheet metal plate fixedly connected to it. The sheet metal plate is rotatably connected to a pivot on the leg support frame. The footrest rotates relative to the leg support frame and has a folded position and an unfolded position relative to the leg support frame. In the folded position, the footrest rotates to fit against the surface of the leg support frame to avoid accidental contact; in the unfolded position, the footrest rotates so that the bearing surface faces vertically upwards to provide a place for the user's feet to rest.

[0004] The footrests mentioned above have the following drawbacks in actual use: When the leg support bracket is rotated upwards to a reclining position, the footrest cannot be further adjusted according to the user's leg posture, resulting in the footrest being roughly perpendicular to the leg support bracket. The user's feet can only partially contact the footrest, making it difficult to provide better support. Secondly, since the leg support bracket of a sofa is usually covered with a soft padding made of sponge material, in order for the footrest to be fully retracted and close to the surface of the sofa leg support bracket, the rotation center of the footrest must be higher than the surface of the soft padding. Otherwise, the footrest will squeeze the soft padding when flipped and folded, preventing the footrest from being fully retracted. Furthermore, if the rotation center of the footrest is placed on the outside of the soft padding, when the footrest is in the unfolded position, the metal sheet metal connecting the footrest will protrude above the surface of the soft padding and be exposed, posing a safety hazard of accidental injury to the user. Furthermore, when the footrest is rotated to the unfolded position, it relies solely on the friction between itself and the pivot or the limiting block to maintain the angle. When the user places both feet on the footrest, especially when the feet are under pressure or heavy objects are placed on the thighs, the footrest is prone to rotating downwards, resulting in insufficient support stability and thus affecting the user's experience. Summary of the Invention

[0005] This application aims to address or at least partially alleviate the deficiencies of related technologies by providing a footrest mechanism that allows the footrest to be further adjusted according to the user's leg posture when the leg support is rotated upwards to a lying position, thereby providing better support for the user's feet.

[0006] The technical solution of this application is to provide a footrest mechanism having the following structure: including... A footrest bracket is connected to a leg support bracket via a multi-link mechanism. The leg support bracket has a folded position and an extended position, while the footrest bracket has a folded position close to the leg support bracket and a supporting position away from the leg support bracket. When the leg support bracket is in the folded position, the foot support bracket can rotate 85 to 95 degrees from the folded position to the first support position; when the leg support bracket is in the extended position, the foot support bracket can rotate 170 to 185 degrees from the folded position to the second support position.

[0007] In some embodiments, including The first connecting plate is fixedly connected to the leg support bracket; The second connecting plate is fixedly connected to the footrest bracket; The rotating assembly includes a first link and a second link. One end of the first link is rotatably connected to the first connecting plate and the other end is rotatably connected to the second connecting plate. Similarly, one end of the second link is rotatably connected to the first connecting plate and the other end is rotatably connected to the second connecting plate. The first link, the second link, the first connecting plate, and the second connecting plate together constitute the multi-link mechanism, which allows the footrest bracket to flip relative to the leg support bracket, enabling the footrest bracket to switch between a folded position, a first support position, and a second support position. A locking element is slidably connected to the first connecting plate and has a locked position and an unlocked position. In the locked position, it can abut against the rotating component to restrict the rotation of the rotating component and keep the footrest bracket in the first support position. In the unlocked position, the footrest bracket can continue to rotate from the first support position to the second support position. It also includes an elastic element for ensuring that the footrest support always tends to remain in the folded position.

[0008] In some embodiments, one end of the elastic element is connected to the first connecting rod and the other end is connected to the second connecting plate; or one end of the elastic element is connected to the second connecting rod and the other end is connected to the first connecting plate; or one end of the elastic element is connected to the first connecting rod and the other end is connected to the first connecting plate; or one end of the elastic element is connected to the second connecting rod and the other end is connected to the second connecting plate.

[0009] In some embodiments, the first connecting plate is provided with a groove along the height direction, the locking member is slidably engaged in the groove, and the locking member has an abutment portion extending out of the groove; when the footrest is rotated to the first support position, the second connecting rod abuts against the abutment portion to limit its movement.

[0010] In some embodiments, an elastomer is connected to the first connecting plate, the elastomer being connected to the locking member to ensure that the locking member always has a tendency to slide toward the locking position.

[0011] In some embodiments, the slide groove is provided with a hanging hole communicating with the slide groove. When the locking member slides along the length direction of the slide groove into the hanging hole, the locking member is in the unlocked position.

[0012] In some embodiments, the first connecting plate is provided with a protruding stop plate. When the footrest rotates to the second support position, the first connecting rod abuts against the stop plate to limit the movement, so that the footrest is kept in the second support position.

[0013] In some embodiments, the leg support bracket has a first notch on its side wall and the foot support has a second notch on its side wall. The first notch and the second notch are connected to form an installation space, and the rotating component is disposed within the installation space.

[0014] In some embodiments, a fixing plate is fixedly connected to the leg support bracket. The fixing plate has a first elongated hole along the width direction of the leg support bracket, and the first connecting plate has a second elongated hole along the length direction of the leg support bracket. The first connecting plate is fastened by fasteners passing through the first elongated hole and the second elongated hole.

[0015] Another technical solution of this application is to provide a sofa with the following structure, including a seat frame, a backrest support, a leg support support, and a footrest, wherein the footrest is connected by the footrest mechanism described in any of the above embodiments.

[0016] In summary, the footrest mechanism of this application has the following advantages compared with related technologies: When the leg support bracket is in the extended position, the footrest bracket can rotate 170 to 185 degrees from the folded position to the second support position. Therefore, when the leg support bracket is rotated upward to the lying position, the footrest bracket can be further adjusted according to the user's leg posture, that is, it can rotate 170 to 185 degrees from the folded position to the second support position. When the footrest bracket is in the second support position, it is roughly aligned with the leg support bracket along the length direction, which not only extends the length of the leg support bracket, but also allows it to fully contact the feet, thereby providing better support for the user's feet.

[0017] In addition, the footrest mechanism, together with the first connecting plate, the second connecting plate, the first link, and the second link, forms a multi-link mechanism, which allows the footrest bracket to rotate relative to the leg support bracket. That is, the footrest bracket is rotatably connected to the leg support bracket through the multi-link mechanism. Since the multi-link mechanism has a compact overall structure, requires little space for rotation, and has a small rotation range, the rotating components can be integrally set inside the side walls of the leg support bracket and the footrest bracket. This effectively prevents the connecting parts of the footrest bracket from protruding from the soft surface of the leg support bracket when the footrest bracket is in the first or second support position, eliminating the safety hazard of users being accidentally scratched or pinched.

[0018] Furthermore, when the locking element is in the locked position, it rigidly abuts against the rotating component, restricting its rotation and reliably maintaining the footrest bracket in the first support position. Even when both feet are pressing down hard or heavy objects are placed on the thighs, the footrest bracket will not rotate downwards, providing good support stability and improving the user experience. Moreover, when the footrest bracket rotates from the first support position to the second support position, simply sliding the locking element to the unlock position allows it to continue rotating, making operation simple and convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a footrest bracket in a folded position according to some embodiments of this application.

[0020] Figure 2 This is a schematic diagram of a footrest mechanism according to some embodiments of this application.

[0021] Figure 3 This is a side view of a footrest mechanism according to some embodiments of this application.

[0022] Figure 4 This is a schematic diagram of a footrest bracket in a first support position according to some embodiments of this application.

[0023] Figure 5 This is a front structural diagram of a footrest bracket in a first support position according to some embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the back structure of a footrest bracket in a first support position according to some embodiments of this application.

[0025] Figure 7 This is a side view of the footrest bracket in the first support position according to some embodiments of this application.

[0026] Figure 8 This is a schematic diagram of a footrest bracket in a second support position according to some embodiments of this application.

[0027] Figure 9 This is a side view of the footrest bracket in the second support position according to some embodiments of this application.

[0028] Figure 10 This is a schematic diagram of a footrest bracket in a folded position according to some embodiments of this application.

[0029] Figure 11 This is a side view of the footrest bracket in a folded position according to some embodiments of this application.

[0030] Explanation of reference numerals in the attached figures: 1. Seat frame; 2. Backrest support; 3. Leg rest support; 300. First notch; 301. Fixing plate; 302. First elongated hole; 303. Fastener; 4. Footrest support; 400. Second notch; 5. First connecting plate; 500. Slide groove; 501. Hanging hole; 502. Second elongated hole; 503. Stop plate; 6. Second connecting plate; 600. First connecting post; 7. Rotating assembly; 700. First connecting rod; 701. Second connecting rod; 702. Second connecting post; 703. First pivot; 704. Second pivot; 705. Third pivot; 706. Fourth pivot; 8. Elastic element; 9. Locking element; 900. Elastic body; 901. Abutment part. Detailed Implementation

[0031] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0032] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0033] In the embodiments of this application, unless otherwise expressly 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 that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 11 As shown in the figure, this application discloses a footrest mechanism for mounting a footrest bracket 4, which is applicable to furniture such as sofas, lounge chairs, recliners, and electric folding chairs.

[0036] This embodiment uses a sofa as an example. See Figure 1As shown, the footrest mechanism is used to rotatably connect the footrest bracket 4 to the lower end of the leg support bracket 3 of the sofa. When the leg support bracket 3 is in the folded position and the footrest bracket 4 is in the first support position, users who are shorter or have shorter legs can place their feet on the footrest bracket 4 when sitting on the sofa, avoiding the feeling of their legs and feet being unsupported. Ordinary users can place tablets or laptops on their knees and thighs for computer operation. When the leg support bracket 3 is in the extended position and the footrest bracket 4 is in the second support position, users who are taller or have longer legs can lie on the sofa. The footrest bracket 4 extends the length of the leg support bracket 3 to support their heels. Similarly, when the footrest bracket 4 is not in use or during transportation, it can be folded up to avoid accidental contact.

[0037] For example, see Figure 1 , Figure 2 and Figure 3 As shown, the sofa's seat frame 1 has a backrest support 2 at its rear end and a leg support support 3 connected to its front end. The lower end of the leg support support 3 is rotatably connected to a footrest support 4. When the leg support support 3 is in the folded position, it is approximately perpendicular to the ground or the top of the seat frame 1. At this time, the footrest support 4 can be rotated approximately 90° from its folded position to the first support position. In this position, the footrest support 4 is approximately horizontal with its top bearing surface facing upwards, allowing the user to place their feet on it. When the leg support support 3 is in the extended position, the footrest support 4 can be rotated approximately 180° from its folded position to the second support position, making the inclination angle of the footrest support 4 the same as or approximately the same as the inclination angle of the leg support support 3. This provides foot support and extends the length of the leg support support 3. Similarly, the footrest support 4 can be rotated upwards to a folded position where its bearing surface aligns with the surface of the leg support support 3, saving space and preventing accidental contact.

[0038] In this embodiment, when the leg support bracket 3 is in the extended position, the foot support bracket 4 can be rotated 170 to 185 degrees from the folded position to the second support position. Therefore, when the leg support bracket 3 is rotated upward to the lying position, the foot support bracket 4 can be further adjusted according to the user's leg posture, that is, it can be rotated 170 to 185 degrees from the folded position to the second support position. When the foot support bracket 4 is in the second support position, it is roughly aligned with the leg support bracket 3 along the length direction, which not only extends the length of the leg support bracket 3, but also allows it to fully contact the feet, thereby providing better support for the user's feet.

[0039] It is easy to understand that the footrest bracket 4 rotates relative to the leg support bracket 3, and switches between a folded position, a first support position, and a second support position, thereby meeting the usage needs of the sofa in different postures. Furthermore, to improve the comfort of the sofa, both the leg support bracket 3 and the footrest bracket 4 are covered with a soft padded structure made of sponge.

[0040] In this embodiment, the footrest bracket 4 is rotatably connected to the leg support bracket 3 via a footrest mechanism. Specifically, see 4. Figure 5 , Figure 6 and Figure 7 As shown, there are two sets of foot support mechanisms, located on both sides of the foot support bracket 4. Each set of foot support mechanisms includes a first connecting plate 5, a second connecting plate 6, and a rotating component 7. The first connecting plate 5, the second connecting plate 6, and the rotating component 7 are all metal sheet metal parts. The first connecting plate 5 is fixedly connected to the leg support bracket 3 by fastening screws, and the second connecting plate 6 is fixedly connected to the foot support bracket 4 by fastening screws. The first connecting plate 5 is set on the side wall of the leg support bracket 3, and the second connecting plate 6 is set on the side wall of the foot support bracket 4 on the same side as the leg support bracket 3. The first connecting plate 5 and the second connecting plate 6 are arranged opposite to each other. The rotating assembly 7 includes two links: a first link 700 and a second link 701. One end of the first link 700 is rotatably connected to the first connecting plate 5 and the other end is rotatably connected to the second connecting plate 6. Similarly, one end of the second link 701 is rotatably connected to the first connecting plate 5 and the other end is rotatably connected to the second connecting plate 6. The first link 700, the second link 701, the first connecting plate 5, and the second connecting plate 6 together constitute a multi-link mechanism, which allows the foot support bracket 4 to rotate relative to the leg support bracket 3, and allows the foot support bracket 4 to rotate and switch between a folded position, a first support position, and a second support position.

[0041] In this embodiment, the leg support bracket 3 has a first notch 300 on its side wall, and the foot support bracket 4 has a second notch 400 on its side wall. The first notch 300 and the second notch 400 are connected to form an installation space, and the rotating component 7 is disposed within the installation space. That is, the first connecting rod 700 and the second connecting rod 701 of the rotating component 7 are disposed within the notches on the side walls of the leg support bracket 3 and the foot support bracket 4, so as to prevent the rotating component 7 from protruding above the outer surface of the leg support bracket 3 and the foot support bracket 4.

[0042] It is easy to understand that the footrest bracket 4 is rotatably connected to the leg support bracket 3 through a multi-link mechanism consisting of the first link 700, the second link 701, the first connecting plate 5, and the second connecting plate 6. Since the multi-link mechanism has a compact overall structure, requires little space for rotation, and has a small range of rotation, the rotating component 7 can be integrally set inside the side wall of the leg support bracket 3 and the footrest bracket 4. This effectively prevents the connecting parts of the footrest bracket 4 from protruding from the soft surface of the leg support bracket 3 when the footrest bracket 4 is in the first support position or the second support position, thus eliminating the safety hazard of the user being accidentally scratched or pinched.

[0043] For example, see Figure 7As shown, the first connecting plate 5 is connected to the first rotating shaft 703 and the second rotating shaft 704 from top to bottom, and the second connecting plate 6 is connected to the third rotating shaft 705 and the fourth rotating shaft 706 from top to bottom. The length of the first connecting rod 700 is less than the length of the second connecting rod 701. The first connecting rod 700 is L-shaped, and the second connecting rod 701 is “〕”-shaped. The two ends of the first connecting rod 700 are rotatably connected to the second rotating shaft 704 and the third rotating shaft 705, respectively, and the two ends of the second connecting rod 701 are rotatably connected to the first rotating shaft 703 and the fourth rotating shaft 706, respectively. In this embodiment, in the same projection plane, the connecting line between the center of the axial projection of the second rotating shaft 704 and the center of the axial projection of the third rotating shaft 705 intersects with the connecting line between the center of the axial projection of the first rotating shaft 703 and the center of the axial projection of the fourth rotating shaft 706. Similarly, these two connecting lines always intersect throughout the entire rotation path of the foot support bracket 4. This configuration makes the multi-link mechanism consisting of the first link 700, the second link 701, the first connecting plate 5, and the second connecting plate 6 more compact, and requires less space for rotation, thus making the joint between the foot support bracket 4 and the leg support bracket 3 smaller.

[0044] See also Figure 7 As shown, when the footrest bracket 4 rotates to the first support position relative to the leg support bracket 3, the angle between the footrest bracket 4 and the leg support bracket 3 is 85 to 95 degrees. This angle is preferably set to 88 degrees, so that when the user sits on the sofa and places both feet on the footrest bracket 4, the footrest bracket 4 can provide better support for the feet.

[0045] In some embodiments, see Figure 4 , Figure 5 and Figure 7 As shown, the footrest mechanism also includes an elastic element 8, which is a cylindrical helical spring. One end of the elastic element 8 is connected to the first connecting rod 700, and the other end is connected to the second connecting plate 6. The elastic element 8 is used to ensure that the footrest bracket 4 always has a tendency to rotate towards the folded position. Specifically, a first connecting post 600 is fixedly connected to the second connecting plate 6, and a second connecting post 702 is fixedly connected to the first connecting rod 700. The two ends of the elastic element 8 are respectively connected to the first connecting post 600 and the second connecting post 702. When the footrest bracket 4 rotates relative to the leg support bracket 3 to the folded position, see... Figure 10 and Figure 11 As shown, the elastic force of the elastic element 8 keeps the footrest bracket 4 in the folded position and makes the bearing surface of the footrest bracket 4 fit against the surface of the leg support bracket 3. During the process of the footrest bracket 4 rotating relative to the leg support bracket 3 from the folded position to the first support position, the elastic element 8 stretches to store elastic potential energy. When the user places both feet on the footrest bracket 4, the elastic force of the elastic element 8 makes the footrest bracket 4 fit tightly against the user's feet and allows the footrest bracket 4 to rotate synchronously with the rotation of the feet to provide foot support.

[0046] In other embodiments, the elastic element 8 may also be connected in the following ways: one end of the elastic element 8 is connected to the second connecting rod 701 and the other end is connected to the first connecting plate 5; or one end of the elastic element 8 is connected to the first connecting rod 700 and the other end is connected to the first connecting plate 5; or one end of the elastic element 8 is connected to the second connecting rod 701 and the other end is connected to the second connecting plate 6; or one end of the elastic element 8 is connected to the first connecting plate 5 and the other end is connected to the second connecting plate 6; or the elastic element 8 may also be configured as a torsion spring, which is sleeved on one of the first rotating shaft 703, the second rotating shaft 704, the third rotating shaft 705 and the fourth rotating shaft 706, so that the foot support bracket 4 always has a tendency to rotate towards the folding position, and can automatically rotate from the first support position or the second support position to the folding position.

[0047] It is easy to understand that when the footrest bracket 4 rotates to the first support position and the user places both feet on it, if pressure is applied by the feet or heavy objects such as laptops are placed on the thighs, and the elastic force of the elastic element 8 is insufficient to provide effective support, the footrest bracket 4 is prone to rotate downwards around the rotation axis, resulting in insufficient support stability. Therefore, in this embodiment, see... Figure 4 and Figure 7 As shown, the footrest mechanism also includes a locking member 9, which is slidably connected to the first connecting plate 5. The locking member 9 has a locked position and an unlocked position, and can switch between the locked and unlocked positions. In the locked position, the locking member 9 can abut against the rotating component 7 to restrict the rotation of the rotating component 7, keeping the footrest bracket 4 in the first support position. When the locking member 9 slides to the unlocked position, the rotation of the rotating component 7 is released, and the footrest bracket 4 can continue to rotate downward from the first support position to the second support position. Therefore, when the locking member 9 is in the locked position, it can rigidly abut against the rotating component 7 to restrict the rotation of the first link 700 and the second link 701 of the rotating component 7, so that the footrest bracket 4 can be reliably kept in the first support position. Even when both feet are forcefully stepping on the footrest bracket 4 or heavy objects are placed on the thighs, the footrest bracket 4 will not rotate downward, providing good support stability and improving the user experience. Moreover, when the footrest bracket 4 rotates from the first support position to the second support position, it is only necessary to slide the locking member 9 to the unlocked position to continue rotating, making the operation simple and convenient.

[0048] Specifically, in this embodiment, the first connecting plate 5 is provided with a groove 500 along the height direction, the locking member 9 is slidably engaged in the groove 500, and the locking member 9 has an abutment portion 901 extending out of the groove 500; when the foot support bracket 4 rotates to the first support position, the second connecting rod 701 abuts against the abutment portion 901 and is limited. Specifically, see Figure 4 and Figure 7As shown, the locking member 9 is cylindrical, and the slide groove 500 is located outside the first rotating shaft 703 and the second rotating shaft 704 and extends along the height direction of the first connecting plate 5. The locking member 9 is slidably fitted in the slide groove 500, and the locking member 9 protrudes outward along the first connecting plate 5 along the axial direction, forming abutment 901. When the locking member 9 slides along the length direction of the slide groove 500 to the locking position, the abutment 901 of the locking member 9 can provide support when the foot support bracket 4 rotates to the first support position. Specifically, when the foot support bracket 4 rotates to the first support position and both feet are placed on the foot support bracket 4, the second connecting rod 701 of the rotating component 7 abuts against and limits the abutment 901 of the locking member 9, thereby restricting the downward rotation of the rotating component 7 and providing stable support for the foot support bracket 4.

[0049] Furthermore, when the locking member 9 is slid from the locked position to the unlocked position of the slide groove 500, the abutment portion 901 of the locking member 9 no longer abuts against the second link 701 of the rotating assembly 7. Therefore, the footrest bracket 4 can continue to rotate downward from the first support position to the second support position. This second support position refers to the position where the footrest bracket 4 is rotated to approximately flush with the leg support bracket 3, or the extreme downward rotation position of the rotating assembly 7. See [reference needed]. Figure 8 and Figure 9 As shown, the foot support bracket 4 is rotated to be roughly flush with the leg support bracket 3. The foot support bracket 4 serves to extend the length of the leg support bracket 3, thereby providing better support for the human body.

[0050] In some embodiments, see Figure 7 As shown, an elastic body 900, which is a spring, is connected to the first connecting plate 5. The upper end of the elastic body 900 is connected to the locking member 9, and the lower end is connected to the fixing post on the first connecting plate 5. The elastic body 900 is used to ensure that the locking member 9 always has a tendency to slide towards the locking position and to keep the locking member 9 in the locked position. When the locking member is unlocked, the user only needs to grasp the abutment part 901 of the locking member 9 with his hand to overcome the elastic force of the elastic body 900 and pull the locking member 9 upward, so that the locking member 9 slides in the slide groove 500 to the unlocked position, thereby allowing the foot support bracket 4 to rotate from the first support position to the second support position.

[0051] To facilitate keeping the locking element 9 in the locked position and to prevent it from interfering with the rotation of the rotating assembly 7, the footrest bracket 4 can be rotated directly from the folded position to the second support position. See [reference needed]. Figure 6 As shown, a hanging hole 501 communicating with the slide groove 500 is provided on one side of the top of the slide groove 500. When the locking member 9 slides into the hanging hole 501 along the length of the slide groove 500, the locking member 9 can be kept in the unlocked position. When the locking member 9 slides out of the hanging hole 501, under the elastic force of the elastic body 900, the locking member 9 can automatically slide to the locked position.

[0052] See Figure 8 and Figure 9 As shown, the first connecting plate 5 is provided with a protruding stop plate 503. When the foot support bracket 4 is rotated 170 to 185 degrees to the second support position, the first connecting rod 700 abuts against the stop plate 503 to limit its movement, thus keeping the foot support bracket 4 in the second support position. The limiting cooperation between the stop plate 503 and the first connecting rod 700 not only ensures that the foot support bracket 4 is stably kept in the second support position, but also prevents the foot support bracket 4 from rotating excessively, which would cause the first connecting rod 700 and the second connecting rod 701 to be squeezed and bent.

[0053] In some embodiments, see Figure 6 As shown, a fixing plate 301 is fixedly connected to the back of the leg support bracket 3. The fixing plate 301 has a first elongated hole 302 along the width direction of the leg support bracket 3, and a first connecting plate 5 has a second elongated hole 502 along the length direction of the leg support bracket 3. The first connecting plate 5 is fastened by fasteners 303 passing through the first elongated hole 302 and the second elongated hole 502. With the fasteners 303 loosened, the position of the first connecting plate 5 in the width direction of the leg support bracket 3 can be adjusted through the first elongated hole 302, and the position of the first connecting plate 5 in the length direction of the leg support bracket 3 can be adjusted through the second elongated hole 502. This allows the height and extension length of the first connecting plate 5 to be adjusted, facilitating the installation of the first connecting plate 5 and enabling the first connecting plate 5 to better adapt to the position of the second connecting plate 6.

[0054] See Figure 1 , Figure 2 and Figure 3 As shown, another embodiment of this application discloses a sofa, which includes a seat frame 1, a backrest support 2, a leg support support 3, and a footrest. The footrest adopts the footrest mechanism of any of the above embodiments. When the leg support support 3 of the sofa is rotated upward to a reclining position, the footrest support 4 can be further adjusted according to the user's leg posture, that is, it can be rotated 170 to 185 degrees from the folded position to the second support position. When the footrest support 4 is in the second support position, it is roughly aligned with the leg support support 3 along the length direction, which not only extends the length of the leg support support 3, but also allows it to fully contact the feet, thereby providing better support for the user's feet. In addition, the footrest support 4 of this sofa is rotatably connected to the leg support support 3 through a multi-link mechanism. Since the multi-link mechanism has a compact overall structure, requires little space for rotation, and has a small rotation range, the rotating component 7 can be integrally set inside the side wall of the leg support support 3 and the footrest support 4, effectively preventing the connecting parts of the footrest support 4 from protruding from the soft surface of the leg support support 3 when the footrest is in the first or second support position, eliminating the safety hazard of the user being accidentally scratched or pinched. Furthermore, the locking element 9 provides better support and stability to the footrest bracket 4 in the first support position.

[0055] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0056] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "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 this application. 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 a suitable manner in any 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.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A footrest mechanism, characterized in that: The device includes a footrest bracket, which is connected to a leg support bracket via a multi-link mechanism. The leg support bracket has a folded position and an extended position, and the footrest bracket has a folded position close to the leg support bracket and a supporting position away from the leg support bracket. When the leg support bracket is in the folded position, the foot support bracket can be rotated 85 to 95 degrees from the folded position to the first support position; When the leg support bracket is in the extended position, the foot support bracket can be rotated 170 to 185 degrees from the folded position to the second support position.

2. The footrest mechanism according to claim 1, characterized in that: include The first connecting plate is fixedly connected to the leg support bracket; The second connecting plate is fixedly connected to the footrest bracket; The rotating assembly includes a first link and a second link. One end of the first link is rotatably connected to the first connecting plate and the other end is rotatably connected to the second connecting plate. Similarly, one end of the second link is rotatably connected to the first connecting plate and the other end is rotatably connected to the second connecting plate. The first link, the second link, the first connecting plate, and the second connecting plate together constitute the multi-link mechanism, which allows the footrest bracket to flip relative to the leg support bracket, enabling the footrest bracket to switch between a folded position, a first support position, and a second support position. The locking element is slidably connected to the first connecting plate and has a locked position and an unlocked position. In the locked position, it can abut against the rotating component to restrict the rotation of the rotating component and keep the foot support bracket in the first support position. When in the unlocked position, the footrest bracket can continue to rotate from the first support position to the second support position; It also includes an elastic element for ensuring that the footrest support always tends to remain in the folded position.

3. The footrest mechanism according to claim 2, characterized in that: One end of the elastic element is connected to the first connecting rod and the other end is connected to the second connecting plate; or one end of the elastic element is connected to the second connecting rod and the other end is connected to the first connecting plate; or one end of the elastic element is connected to the first connecting rod and the other end is connected to the first connecting plate; or one end of the elastic element is connected to the second connecting rod and the other end is connected to the second connecting plate.

4. The footrest mechanism according to claim 2, characterized in that: The first connecting plate is provided with a groove along the height direction, the locking member is slidably engaged in the groove, and the locking member has an abutting part that extends out of the groove; when the footrest rotates to the first support position, the second connecting rod abuts against the abutting part and limits its movement.

5. The footrest mechanism according to claim 4, characterized in that: An elastic body is connected to the first connecting plate, and the elastic body is connected to the locking member to make the locking member always have a tendency to slide towards the locking position.

6. The footrest mechanism according to claim 5, characterized in that: The slide is provided with a hanging hole that communicates with the slide. When the locking member slides along the length of the slide into the hanging hole, the locking member is in the unlocked position.

7. The footrest mechanism according to claim 2, characterized in that: The first connecting plate is provided with a protruding stop plate. When the footrest rotates to the second support position, the first connecting rod abuts against the stop plate to limit the movement, so that the footrest is kept in the second support position.

8. The footrest mechanism according to claim 2, characterized in that: The leg support bracket has a first notch on its side wall, and the foot support has a second notch on its side wall. The first notch and the second notch are connected to form an installation space, and the rotating component is disposed within the installation space.

9. The footrest mechanism according to claim 2, characterized in that: A fixing plate is fixedly connected to the leg support bracket. The fixing plate has a first elongated hole along the width direction of the leg support bracket. The first connecting plate has a second elongated hole along the length direction of the leg support bracket. The first connecting plate is fastened by fasteners passing through the first elongated hole and the second elongated hole.

10. A sofa, comprising a seat frame, a backrest support, a leg support support, and a footrest, characterized in that: The footrest adopts the footrest mechanism described in any one of claims 1 to 9.

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