Automatic opening and closing structure of the armrests of functional sofas

Abstract

The present invention discloses an automatic armrest opening and closing structure for a functional sofa, comprising a base, a seat assembly, a backrest assembly, and an armrest assembly; the base having a base plate and front and rear support rods; the seat assembly comprising a seat mounting plate, a front connecting rod, and a rear crank, wherein the two ends of the front connecting rod are respectively pivotally connected to the seat mounting plate and the front support rod; the rear crank has a lower end, a rear end, and a front inflection point, and the lower end and rear end are respectively pivotally connected to the seat mounting plate and the rear support rod; the backrest assembly comprises a backrest frame and a backrest connecting rod, wherein the front end of the backrest frame is pivotally connected to the seat mounting plate and the rear end is pivotally connected to the backrest connecting rod, and the lower end of the backrest connecting rod is pivotally connected to the lower end; the armrest assembly comprises an armrest, a first connecting rod, and a second connecting rod, wherein the rear end of the first connecting rod is pivotally connected to the backrest frame and the front end is connected to the armrest; the lower end of the second connecting rod is pivotally connected to the front inflection point of the rear crank, and the upper end is pivotally connected to the first connecting rod. The present invention can significantly improve the convenience and comfort of using a functional sofa.

Description

Technical Field

[0001] The invention relates to the field of sofas, and in particular to an automatic opening and closing structure of an armrest of a functional sofa. Background Art

[0002] With the development of society, sofas with adjustable functions have become increasingly common in people's daily lives. These adjustable sofas are equipped with an internal mechanical support frame, also known as a functional iron frame. This mechanical support frame generally includes a footrest mechanism, a seat mechanism, and a backrest mechanism. A series of mechanical linkages between the three mechanisms adjust the relative positions and angles of the footrest, seat, and backrest, enabling switching between sitting, relaxing, and fully reclining positions.

[0003] In the prior art, when a functional sofa switches from a lying position to a fully lying position, the user's body will move backward, that is, the arms will also move backward, while the armrests are in the front, resulting in the user's arms being unable to be effectively supported, significantly reducing the user's comfort. Therefore, further improvement is needed. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic opening and closing structure for the armrests of a functional sofa, which can significantly improve the convenience and comfort of using the functional sofa.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An automatic opening and closing structure for armrests of a functional sofa is characterized by comprising a base, a seat assembly, a backrest assembly and an armrest assembly;

[0007] The base comprises a base plate and a front support rod and a rear support rod pivotally connected to the front and rear ends of the base plate;

[0008] The seat assembly includes a seat mounting plate, a front connecting rod and a rear crank, wherein both ends of the front connecting rod are pivotally connected to the front portion of the seat mounting plate and the upper end portion of the front support rod, respectively; the rear crank has a lower end, a rear end and a front inflection point, and the lower end and the rear end are pivotally connected to the rear portion of the seat mounting plate and the upper end portion of the rear support rod, respectively;

[0009] The backrest assembly includes a backrest frame and a backrest connecting rod, wherein the front end of the backrest frame is pivotally connected to the upper end of the rear side of the seat mounting plate, the rear end is pivotally connected to the upper end of the backrest connecting rod, and the lower end of the backrest connecting rod is pivotally connected to the lower end of the rear crank;

[0010] The armrest assembly includes an armrest, a first connecting rod and a second connecting rod. The rear end of the first connecting rod is pivotally connected to the backrest bracket, and the front end is connected to the armrest. The lower end of the second connecting rod is pivotally connected to the front inflection point of the rear crank, and the upper end is pivotally connected to the first connecting rod.

[0011] Preferably, the armrest has at least two groups of connection holes for mounting on the first connecting rod, and each group of connection holes includes a plurality of connection holes for facilitating height adjustment of the armrest.

[0012] Preferably, a bridging rod is provided between the front connecting rod and the rear bell crank.

[0013] Preferably, the lower end portion of the rear crank is widened to reserve a front pivoting position for the seat mounting plate to be pivoted and a rear pivoting position for the backrest connecting rod to be pivoted.

[0014] Preferably, the rear end of the seat mounting plate has a connecting portion extending upward and for pivotally connecting the backrest frame.

[0015] The advantages of this invention are as follows: when the functional sofa switches from a reclining position to a fully reclining position, the seat mounting plate moves forward, driving the rear crank to rotate counterclockwise, pushing the second connecting rod upward, and simultaneously driving the front end of the first connecting rod to swing upward, raising the armrests and automatically deploying them to facilitate arm support. Conversely, the seat mounting plate moves backward, and the armrest assembly closes. This significantly improves the convenience and comfort of use of this invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the functional sofa provided in this embodiment in a fully reclining position;

[0017] Figure 2 This is a schematic diagram of the functional sofa provided in this embodiment in a lying position;

[0018] Figure 3 Another schematic diagram of the functional sofa provided in this embodiment in a fully reclining position;

[0019] Figure 4 This is a schematic diagram of the armrest assembly provided in this embodiment in a closed state. DETAILED DESCRIPTION

[0020] Combine Figures 1 to 4 The automatic opening and closing structure of the armrests of the functional sofa of the present invention is further described.

[0021] A functional sofa armrest automatic opening and closing structure is characterized by comprising a base 1, a seat assembly 2, a backrest assembly 4, and an armrest assembly 5. The base 1 comprises a base plate 12 and a front support rod 11 and a rear support rod 13 pivotally connected to the front and rear ends of the base plate 12, the upper ends of the front support rod 11 and the rear support rod 13 being able to swing freely. The seat assembly 2 comprises a seat mounting plate 21, a front connecting rod 22, and a rear crank 23. The two ends of the front connecting rod 22 are pivotally connected to the front portion of the seat mounting plate 21 and the upper end of the front support rod 11, respectively. The rear crank 23 comprises a lower end 231, a rear end 232, and a front inflection point 233. The lower end 231 and the rear end 232 are pivotally connected to the rear portion of the seat mounting plate 21 and the upper end of the rear support rod 13, respectively. The backrest assembly 4 includes a backrest frame 41 and a backrest connecting rod 42. The front end of the backrest frame 41 is pivotally connected to the upper rear end of the seat mounting plate 21, and the rear end is pivotally connected to the upper end of the backrest connecting rod 42. The lower end of the backrest connecting rod 42 is pivotally connected to the lower end 231 of the rear crank 23. The armrest assembly 5 includes an armrest 53, a first connecting rod 51, and a second connecting rod 52. The rear end of the first connecting rod 51 is pivotally connected to the middle part of the backrest frame 41, and the front end is connected to the armrest 53. The lower end of the second connecting rod 52 is pivotally connected to the front inflection point 233 of the rear crank 23, and the upper end is pivotally connected to the middle or front part of the first connecting rod 51.

[0022] Specifically, the armrest 53 has at least two sets of connection holes 531 for mounting on the first connecting rod 51. This embodiment employs two sets, each of which includes multiple connection holes that facilitate height adjustment of the armrest 53. In other words, the first connecting rod 51 has two mounting holes for the two connection holes 531 to mate with. When the different connection holes are aligned with the mounting holes via connecting bolts, the height of the armrest 53 can be adjusted to suit the needs of different users.

[0023] The multiple connection holes in each connection hole group 531 are connected to each other and have overlapping parts to reduce the adjustment distance.

[0024] A bridging rod 3 is provided between the front connecting rod 22 and the rear bell crank 23 to ensure the linkage and stability of the entire mechanism.

[0025] The lower end portion 231 of the rear crank 23 is widened to reserve a front pivoting position for the seat mounting plate 21 to be pivoted and a rear pivoting position for the backrest connecting rod 42 to be pivoted. The pivoting positions are pivoting holes.

[0026] A limit pin 234 is provided at the lower end portion 231 of the rear crank 23 for supporting the rear end of the seat mounting plate 21 in a lying position. The limit pin 234 also serves as a support for the front side of the backrest connecting rod 42 in a fully lying position to enhance the stability of the functional iron frame in various postures.

[0027] The rear end of the seat mounting plate 21 has a connecting portion 211 extending upward and pivotally connected to the backrest frame 41 to increase the installation height of the backrest frame 41. A telescopic leg rest assembly is provided at the front side of the seat mounting plate 21.

[0028] Based on the above structure, the motor pipe in the functional sofa is connected to the seat mounting plate 21. Figure 2 Switch the lying position shown to Figure 1 During the fully reclining position, the motor drives the seat mounting plate 21 to move forward and upward, driving the lower end 231 of the rear crank 23 forward. Under the pull of the rear support rod 13, the rear crank 23 moves forward appropriately and rotates counterclockwise. After the rear crank 23 rotates counterclockwise, it pulls the backrest connecting rod 42 downward, causing the rear end of the backrest frame 41 to swing downward, achieving the fully reclining position. At the same time, the rear crank drives the second connecting rod 52 upward, pushing up the front end of the first connecting rod 51, and realizing the deployment of the armrest 53 to provide support for the user's arms in the fully reclining position. Conversely, when switching from the fully reclining position to the reclining position, the motor drives the seat mounting plate 21 backward to realize the closure of the armrest assembly 5. During this process, the armrest assembly 5 can automatically open and close, significantly improving the convenience and comfort of use.

[0029] In this embodiment, the pivot structure is realized by a pivot shaft and a corresponding pivot shaft.

[0030] Unless otherwise specified, in the present invention, if there are terms such as "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationships in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the accompanying drawings and according to specific circumstances.

[0031] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this disclosure should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An automatic opening and closing structure for the armrests of a functional sofa, characterized by: Includes a base, a seat assembly, a backrest assembly, and an armrest assembly; The base comprises a base plate and a front support rod and a rear support rod pivotally connected to the front and rear ends of the base plate; The seat assembly includes a seat mounting plate, a front connecting rod and a rear crank, wherein both ends of the front connecting rod are pivotally connected to the front portion of the seat mounting plate and the upper end portion of the front support rod, respectively; the rear crank has a lower end, a rear end and a front inflection point, and the lower end and the rear end are pivotally connected to the rear portion of the seat mounting plate and the upper end portion of the rear support rod, respectively; The backrest assembly includes a backrest frame and a backrest connecting rod, wherein the front end of the backrest frame is pivotally connected to the upper end of the rear side of the seat mounting plate, the rear end is pivotally connected to the upper end of the backrest connecting rod, and the lower end of the backrest connecting rod is pivotally connected to the lower end of the rear crank; The armrest assembly includes an armrest, a first connecting rod and a second connecting rod, wherein the rear end of the first connecting rod is pivotally connected to the backrest frame, and the front end is connected to the armrest, the lower end of the second connecting rod is pivotally connected to the front inflection point of the rear crank, and the upper end is pivotally connected to the first connecting rod; The armrest has at least two groups of connection holes for mounting on the first connecting rod, each group of connection holes including a plurality of connection holes for facilitating height adjustment of the armrest; the plurality of connection holes in each group of connection holes are interconnected and have overlapping portions; A bridge rod is provided between the front connecting rod and the rear bell crank.

2. The automatic opening and closing structure of the armrest of the functional sofa according to claim 1 is characterized by: The lower end portion of the rear crank is widened to reserve a front pivoting position for the seat mounting plate to be pivoted and a rear pivoting position for the backrest connecting rod to be pivoted.

3. The automatic opening and closing structure of the armrest of the functional sofa according to claim 1 is characterized by: The rear end of the seat mounting plate is provided with a connecting portion extending upward and for pivotally connecting the backrest frame.

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