A reclining backrest armrest rotation conversion structure

Abstract

This application discloses a slanted backrest and armrest rotation conversion structure, relating to the technical field of sofas. It includes a seat cushion fixing frame and a backrest frame. The seat cushion fixing frame is provided with a connector, and one end of the backrest frame is provided with a rotating component that rotatably engages with the connector. A limiting component is provided between the seat cushion fixing frame and the backrest frame to restrict the rotation angle of the rotating component. The seat cushion fixing frame is vertically mounted at one corner of the seat cushion frame. The backrest frame is rotatably connected to the seat cushion fixing frame through the rotational engagement of the rotating component and the connector. Under the restriction of the limiting component, the backrest frame can rotate from the rear side of the seat cushion frame towards one side, thereby achieving the conversion between the backrest and armrest. This restricts the rotation of the backrest frame within a certain angle range, allowing it to adjust according to changes in the user's sitting posture and providing comfortable support.

Description

Technical Field

[0001] This application relates to the technical field of sofas, and in particular to a slanted backrest and armrest rotation conversion structure. Background Technology

[0002] Current upholstered sofas have relatively simple backrest and armrest structures with conventional symmetrical designs. The backrest frame, armrest frame, and seat cushion frame are often fixedly connected, unable to be converted into different functions, which limits the sofa's usage scenarios and ergonomic design. Furthermore, as people's sitting posture changes over time, the backrest and armrests cannot adjust accordingly, failing to provide comfortable support for users and thus needing improvement. Summary of the Invention

[0003] The purpose of this application is to provide a tilting backrest armrest rotation conversion structure to solve the problem that the backrest armrest cannot be adjusted according to the sitting posture.

[0004] The technical solution for the tilt-back armrest rotation conversion structure provided in this application is as follows:

[0005] A slanted backrest armrest rotation conversion structure includes a seat cushion fixing frame and a backrest frame. The seat cushion fixing frame is provided with a connector, and one end of the backrest frame is provided with a rotating component that rotatably engages with the connector. A limiting component for limiting the rotation angle of the rotating component is provided between the seat cushion fixing frame and the backrest frame.

[0006] By adopting the above technical solution, the seat cushion fixing frame is installed vertically at one corner of the seat cushion frame. The backrest frame is rotatably connected to the seat cushion fixing frame through the rotational cooperation of the rotating part and the connecting part. Under the restriction of the limiting component, the backrest frame can rotate from the rear side of the seat cushion frame to one side of the seat cushion frame to realize the conversion between the backrest and the armrest. The backrest frame is restricted to rotate within a certain angle range, so as to adjust at any time according to the user's sitting posture, provide comfortable support for the user, meet the humanized design requirements, and improve the humanized design of the product.

[0007] Optionally, the backrest frame includes a rotating rod, and the limiting assembly includes a limiting member disposed on the seat cushion fixing frame and a limiting rod disposed at one end of the rotating rod. The limiting member is provided with a limiting groove extending along the rotation direction of the backrest frame, and the limiting rod is slidably connected to the limiting groove.

[0008] By adopting the above technical solution, the sliding connection between the limiting rod and the limiting groove can guide and limit the rotation of the backrest frame, restricting the rotation of the backrest frame within a certain angle range, while improving the stability of the backrest frame rotation.

[0009] Optionally, the connecting member is a bushing fixedly connected to the seat cushion fixing frame, the bushing being inclined in stages along its own length towards the direction away from the seat cushion fixing frame, and the rotating member is a rotating shaft fixedly connected to one end of the rotating rod at an incline, the rotating shaft being rotatably connected to the bushing.

[0010] By adopting the above technical solution, the bushing and the seat cushion fixing frame are set at an angle, and the rotating shaft and the rotating rod are set at an angle. During the process of the backrest frame changing from a backrest to an armrest, the rotating rod rotates around the axis of the rotating shaft and moves away from the upper end of the seat cushion frame step by step. After rotating to a certain angle, the rotating rod moves towards the seat cushion frame until it is parallel to the upper end of the seat cushion frame again. The same process occurs during the process of the backrest frame changing from an armrest to a backrest.

[0011] Therefore, after the seat cushion frame and backrest frame are covered with materials such as leather, the wear between the covering materials on the backrest frame and seat cushion frame is effectively reduced during the rotation of the backrest frame, improving the smoothness of rotation, increasing the service life of the covering materials, and also increasing the service life of the sofa.

[0012] Optionally, the bushing is provided with a rotating hole extending along its own length direction, the rotating shaft is rotatably connected in the rotating hole, and a positioning structure is provided between the bushing and the rotating shaft to restrict the rotating shaft from moving out of the rotating hole.

[0013] By adopting the above technical solution, the rotating rod is inserted and rotatably connected in the rotating hole, and the positioning structure restricts the rotating rod in the rotating hole, thereby achieving a fixed connection between the rotating shaft and the bushing.

[0014] Optionally, the rotating shaft includes a head fixedly connected to one end of the rotating rod and a rod fixedly connected to the head. The rod passes through and is rotatably connected to the rotating hole. The head is provided with an inclined surface corresponding to the rotating hole, and one end of the rod is fixedly connected to the inclined surface.

[0015] By adopting the above technical solution, the rod is set on the inclined surface of the head, and the rod is rotatably connected to the rotating hole, so that the backrest frame can be converted into an armrest or an armrest into a backrest. It moves from being parallel to the upper end of the seat cushion frame to moving away from the seat cushion frame step by step. After rotating to a certain angle, the backrest frame moves towards the seat cushion frame until it is parallel to the upper end of the seat cushion frame again.

[0016] Optionally, the positioning structure includes a positioning groove disposed on the bushing, an annular groove disposed on the rotating shaft and corresponding to the positioning groove, and an elastic element sleeved on the bushing, wherein the elastic element includes a positioning part that cooperates with the positioning groove and the annular groove.

[0017] By adopting the above technical solution, the positioning part is embedded in the positioning groove, which can restrict the movement of the elastic element along the length direction of the bushing and improve the stability of the elastic element and the bushing.

[0018] The rotating shaft is inserted into the rotating hole from one end of the bushing. When the circumferential sidewall of the rotating shaft passes through the positioning groove, the circumferential sidewall of the rotating shaft abuts against the positioning part, causing the positioning part to be subjected to force and undergo elastic deformation and move in the direction outside the positioning groove.

[0019] When the positioning groove and the annular groove are aligned, the positioning part elastically resets and moves in the direction of the positioning groove until it is embedded in the annular groove, so as to restrict the rotating shaft from moving out of the rotating hole. At the same time, when the rotating shaft rotates, the positioning part moves along the extension direction of the annular groove to realize the rotational connection between the rotating shaft and the bushing.

[0020] When the rotating shaft needs to be disassembled, the rotating shaft is pulled out of the rotating hole from one end of the bushing by external force. This causes the positioning part to undergo elastic deformation under force, move out of the annular groove and move out of the positioning groove, thereby realizing the quick disassembly and assembly of the rotating shaft and bushing. This facilitates the disassembly and packaging of the backrest and seat cushion, achieving flat packaging and saving packaging volume.

[0021] Optionally, the rod is fitted with at least two lubrication sleeves, the inner circumferential wall of the lubrication sleeves being fitted with the circumferential sidewall of the rod, and the outer circumferential wall being fitted with the wall of the rotating hole.

[0022] By adopting the above technical solution, the lubricating sleeve lubricates the rotation of the rod, improving the smoothness of the rod's rotation within the rotating hole.

[0023] Optionally, the rotating bushing is provided with a gasket, the gasket including a contact portion located between the head and the bushing.

[0024] By adopting the above technical solution, the gasket can seal the gap between the head and one end of the bushing. Simultaneously, being positioned between the bushing and the head, it effectively reduces contact between the head and bushing during the rotation of the shaft, reducing frictional damage and extending service life. Furthermore, it provides dust prevention, reducing dust entry between the rod and the wall of the rotating hole, thus improving the smoothness of the shaft's rotation.

[0025] Optionally, the gasket may further include a filling portion disposed on the side of the contact portion opposite to the head, the filling portion filling the gap between the circumferential outer wall of the rod portion and the hole wall of the rotating hole.

[0026] By adopting the above technical solution, the filling part can further reduce the amount of dust entering between the rod and the hole wall of the rotating hole, thereby improving the dustproof effect.

[0027] Optionally, the backrest frame further includes a backrest bracket disposed on the rotating rod, the rotating rod being provided with a fixing rod, the backrest bracket being provided with a fixing groove that engages with the fixing rod, and the backrest bracket being connected to the rotating rod by fasteners.

[0028] By adopting the above technical solution, the fixing rod is first connected to the fixing slot, and then the backrest frame and the rotating rod are detachably connected by fasteners, so as to realize the disassembly and packaging of the backrest frame and the rotating rod, and further save packaging volume.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The seat cushion fixing frame is installed vertically at one corner of the seat cushion frame. The backrest frame is rotatably connected to the seat cushion fixing frame through the rotational engagement of the rotating parts and the connecting parts. Under the restriction of the limiting components, the backrest frame can rotate from the rear side of the seat cushion frame to one side of the seat cushion frame to realize the conversion between the backrest and the armrest. The backrest frame is restricted to rotate within a certain angle range, so as to adjust at any time according to the user's sitting posture, provide comfortable support for the user, meet the human design requirements, and improve the humanized design of the product.

[0031] 2. During the process of the backrest frame transforming into an armrest, the rotating rod rotates around the axis of rotation while gradually moving away from the upper part of the seat cushion frame from a parallel position. After rotating to a certain angle, the rotating rod moves closer to the seat cushion frame until it is parallel to the upper part of the seat cushion frame again. After the seat cushion frame and backrest frame are covered with materials such as leather, the wear between the covering materials on the backrest frame and seat cushion frame is effectively reduced during the rotation of the backrest frame, improving the smoothness of rotation, increasing the service life of the covering materials, and also increasing the service life of the sofa.

[0032] 3. Enables quick assembly and disassembly of the rotating shaft and bushing, facilitating the disassembly and packaging of the backrest and seat cushion, achieving flat packaging, and saving packaging volume;

[0033] 4. It achieves better ergonomic design, with angled backrests and armrests, bringing a novel visual experience. Compared to the fixed design, the convertible backrest has a new visual effect and variability, making it more eye-catching and improving the comfort and added value of the product. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0035] Figure 2 This is an exploded view of the backrest frame according to an embodiment of this application;

[0036] Figure 3This is a schematic diagram of the rotation process of the backrest frame according to an embodiment of this application;

[0037] Figure 4 This is a partial structural diagram of an embodiment of this application;

[0038] Figure 5 This is a partial exploded view of an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the structure of the connector and the rotating component according to an embodiment of this application;

[0040] Figure 7 This is a schematic diagram of the rotating component according to an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Seat cushion fixing frame; 2. Backrest frame; 21. Rotating rod; 211. Fixing rod; 22. Backrest frame; 221. Fixing groove; 3. Connecting part; 31. Bushing; 311. Rotating hole; 4. Rotating part; 41. Rotating shaft; 411. Head; 412. Rod part; 413. Inclined surface; 5. Limiting assembly; 51. Limiting part; 511. Limiting groove; 512. Inclined hole; 52. Limiting rod; 6. Positioning structure; 61. Positioning groove; 62. Annular groove; 63. Elastic part; 631. Positioning part; 7. Lubricating sleeve; 8. Gasket; 81. Contact part; 82. Filling part. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail.

[0043] This application discloses a tilting backrest armrest rotation conversion structure.

[0044] Reference Figure 1 A slanted backrest armrest rotation conversion structure includes a seat cushion fixing frame 1 installed vertically at one corner of a seat cushion frame, a backrest frame 2 installed on the fixing frame, a connecting member 3 installed on the seat cushion fixing frame 1, a rotating member 4 that rotatably engages with the connecting member 3 installed at one end of the backrest frame 2 near the seat cushion fixing frame 1, and a limiting component 5 for limiting the rotation angle of the rotating member 4 installed between the seat cushion fixing frame 1 and the backrest frame 2.

[0045] Reference Figure 2 The backrest frame 2 includes a rotating rod 21 and a backrest bracket 22 mounted on the rotating rod 21. Two fixing rods 211 are fixedly connected to the side of the rotating rod 21 facing the backrest bracket 22. The fixing rods 211 are square rods. The backrest bracket 22 has a fixing groove 221 that is inserted and matched with the fixing rods 211. The fixing groove 221 is a square groove. The side of the backrest bracket 22 closest to the rotating rod 21 is fixedly connected to the rotating rod 21 by fasteners, which are conventional bolts.

[0046] Reference Figure 3 , Figure 4 The limiting component 5 includes a limiting member 51 installed on the seat cushion fixing frame 1 and a limiting rod 52 installed on the end of the rotating rod 21 near the seat cushion fixing frame 1. The limiting member 51 is a metal cover fixedly connected to the upper end of the seat cushion fixing frame 1. The upper end of the limiting member 51 is provided with a limiting groove 511 extending along the rotation direction of the backrest frame 2. The limiting rod 52 is slidably connected in the limiting groove 511.

[0047] Reference Figure 4 , Figure 5 The connecting member 3 is a bushing 31 fixedly connected to the seat cushion fixing frame 1 in the vertical direction. The limiting member 51 has an oblique hole 512 for the bushing 31 to pass through. The bushing 31 is inclined in a stepwise direction away from the seat cushion fixing frame 1 along its own length. The rotating member 4 is a rotating shaft 41 that is fixedly connected to the end of the rotating rod 21 near the seat cushion fixing frame 1 in an oblique direction. The upper end of the bushing 31 has a rotating hole 311 extending along its own length. The rotating shaft 41 is rotatably connected in the rotating hole 311 around its own axis. A positioning structure 6 is installed between the bushing 31 and the rotating shaft 41 to prevent the rotating shaft 41 from moving out of the rotating hole 311.

[0048] Reference Figure 4 , Figure 5 The rotating shaft 41 includes a head 411 fixedly connected to one end of the rotating rod 21 and a rod 412 fixedly connected to the head 411. The rod 412 passes through and is rotatably connected in the rotating hole 311. The head 411 has an inclined surface 413 corresponding to the rotating hole 311 on the side near the seat cushion fixing frame 1. The end of the rod 412 near the head 411 is fixedly connected to the inclined surface 413.

[0049] Reference Figure 6 , Figure 7 The positioning structure 6 includes a positioning groove 61 formed on the circumferential outer wall of the bushing 31, an annular groove 62 formed on the circumferential side wall of the rotating shaft 41 and corresponding to the positioning groove 61, and an elastic element 63 sleeved on the circumferential outer wall of the bushing 31. The elastic element 63 is an R-shaped elastic joint made of elastic materials such as elastic metal or elastic plastic. The elastic element 63 includes a positioning part 631 that is embedded and cooperates with the positioning groove 61 and the annular groove 62. The positioning part 631 is rod-shaped.

[0050] Reference Figure 6 , Figure 7The rod 412 is fitted with two lubrication sleeves 7, which are made of metallurgical copper. Metallurgical copper sleeves have better durability than nylon, thus improving service life. The two lubrication sleeves 7 are respectively fitted at both ends of the rod 412. The inner circumferential wall of the lubrication sleeve 7 fits against the circumferential side wall of the rod 412, and the outer circumferential wall fits against the wall of the rotating hole 311. The rotating shaft 41 is also fitted with a gasket 8, which includes a contact portion 81 located between the head 411 and the bushing 31, and a filling portion 82 integrally formed on the side of the contact portion 81 facing away from the head 411. The filling portion 82 fills the gap between the outer circumferential wall of the rod 412 and the wall of the rotating hole 311.

[0051] The implementation principle of the inclined backrest armrest rotation conversion structure in this application embodiment is as follows:

[0052] The seat cushion fixing frame 1 is installed vertically at one corner of the seat cushion frame. The backrest frame 2 is rotatably connected to the seat cushion fixing frame 1 through the rotatable engagement of the rotating part 4 and the connecting part 3. Under the restriction of the limiting component 5, the backrest frame 2 can rotate from the rear side of the seat cushion frame toward one side of the seat cushion frame to realize the conversion between the backrest and the armrest, and restrict the rotation of the backrest frame 2 within a certain angle range, so as to adjust it at any time according to the user's sitting posture.

[0053] During the process of the backrest frame 2 transforming into an armrest, the rotating rod 21 rotates around the axis of rotation 41 while gradually moving away from the upper end of the seat cushion frame from a parallel state. After rotating to a certain angle, the rotating rod 21 moves towards the seat cushion frame until it is parallel to the upper end of the seat cushion frame again. After the seat cushion frame and backrest frame 2 are covered with materials such as leather, the wear between the covering materials on the backrest frame 2 and the seat cushion frame is effectively reduced during the rotation of the backrest frame 2, thus improving the smoothness of the rotation.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tilting backrest armrest rotation conversion structure, characterized in that: It includes a seat cushion fixing frame (1) and a backrest frame (2). The seat cushion fixing frame (1) is provided with a connector (3). One end of the backrest frame (2) is provided with a rotating component (4) that rotatably engages with the connector (3). A limiting component (5) for limiting the rotation angle of the rotating component (4) is provided between the seat cushion fixing frame (1) and the backrest frame (2). The backrest frame (2) includes a rotating rod (21); The connecting member (3) is a bushing (31) fixedly connected to the seat cushion fixing frame (1). The bushing (31) is inclined in a direction away from the seat cushion fixing frame (1) along its own length. The rotating member (4) is a rotating shaft (41) fixedly connected to one end of the rotating rod (21) at an incline. The rotating shaft (41) is rotatably connected to the bushing (31).

2. The tilting backrest armrest rotation conversion structure according to claim 1, characterized in that: The limiting component (5) includes a limiting member (51) disposed on the seat cushion fixing frame (1) and a limiting rod (52) disposed at one end of the rotating rod (21). The limiting member (51) is provided with a limiting groove (511) extending along the rotation direction of the backrest frame (2). The limiting rod (52) is slidably connected in the limiting groove (511).

3. The tilting backrest armrest rotation conversion structure according to claim 2, characterized in that: The bushing (31) is provided with a rotating hole (311) extending along its own length direction. The rotating shaft (41) is rotatably connected in the rotating hole (311). A positioning structure (6) is provided between the bushing (31) and the rotating shaft (41) to restrict the rotating shaft (41) from moving out of the rotating hole (311).

4. The tilting backrest armrest rotation conversion structure according to claim 3, characterized in that: The rotating shaft (41) includes a head (411) fixedly connected to one end of the rotating rod (21) and a rod (412) fixedly connected to the head (411). The rod (412) passes through and is rotatably connected to the rotating hole (311). The head (411) is provided with an inclined surface (413) corresponding to the rotating hole (311). One end of the rod (412) is fixedly connected to the inclined surface (413).

5. The tilting backrest armrest rotation conversion structure according to claim 3, characterized in that: The positioning structure (6) includes a positioning groove (61) disposed on the bushing (31), an annular groove (62) disposed on the rotating shaft (41) and corresponding to the positioning groove (61), and an elastic member (63) sleeved on the bushing (31). The elastic member (63) includes a positioning part (631) that cooperates with the positioning groove (61) and the annular groove (62).

6. The tilting backrest armrest rotation conversion structure according to claim 4, characterized in that: The rod (412) is fitted with at least two lubrication sleeves (7), the inner circumferential wall of the lubrication sleeve (7) is in contact with the circumferential side wall of the rod (412), and the outer circumferential wall is in contact with the hole wall of the rotating hole (311).

7. The tilting backrest armrest rotation conversion structure according to claim 4, characterized in that: The rotating shaft (41) is fitted with a gasket (8), the gasket (8) including a contact portion (81) located between the head (411) and the bushing (31).

8. The tilting backrest armrest rotation conversion structure according to claim 7, characterized in that: The gasket (8) also includes a filling portion (82) disposed on the side of the contact portion (81) opposite to the head (411), the filling portion (82) filling the gap between the circumferential outer wall of the rod portion (412) and the hole wall of the rotating hole (311).

9. The tilting backrest armrest rotation conversion structure according to claim 2, characterized in that: The backrest frame (2) also includes a backrest bracket (22) disposed on the rotating rod (21). The rotating rod (21) is provided with a fixing rod (211), and the backrest bracket (22) is provided with a fixing groove (221) that is inserted and engaged with the fixing rod (211). The backrest bracket (22) and the rotating rod (21) are connected by fasteners.

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