A sofa frame structure
By introducing adjustment and extension components into the single sofa, the problem of the backrest not being adjustable has been solved, enabling flexible adjustment of the backrest angle and seat length, thus improving the sofa's comfort and versatility, making it especially suitable for pregnant women and people with back problems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAINING JIUZHOU FURNITURE CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-06-30
AI Technical Summary
The backrests of existing single sofas are not adjustable, making it difficult to accommodate the different heights and body types of different users, resulting in poor comfort. Furthermore, the fixed angle of the backrest cannot meet the needs of multi-functionality, and is particularly unfriendly to pregnant women and people with back problems.
A sofa frame structure was designed, including an adjustment component, a support component, and an extension component. The backrest angle is adjusted through a transmission worm gear mechanism, and the seat length is extended through insert plates and support springs, enhancing comfort and versatility.
It allows for flexible adjustment of the backrest angle and extension of the seat length, improving the sofa's applicability and comfort, especially meeting the needs of different scenarios and enhancing the overall user experience.
Smart Images
Figure CN224420518U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of home furnishings, and specifically relates to a sofa frame structure. Background Technology
[0002] A single sofa is a type of sofa designed specifically for single-person use. It is typically smaller than a multi-seater sofa, taking up less space and making it suitable for smaller rooms or corners. It provides a comfortable resting space without taking up too much room area. Single sofas come in a variety of styles to suit different decorating styles and personal preferences, including minimalist modern, European classical, and country styles.
[0003] Chinese Patent No. CN222217550U discloses a single sofa frame structure, relating to the furniture field. This single sofa frame structure includes a counterweight base and a circular metal seat fixedly mounted on top of the counterweight base. A rotating sofa backrest frame is rotatably mounted on the outer bottom of the circular metal seat. The rotating sofa backrest frame includes [details omitted]. In this single sofa frame structure, the sofa backrest is movably sleeved onto the outer surface of a mounting metal column on top of a rotating support plate. The sofa's soft base is mounted on top of the circular metal seat. When rotation is required, a T-shaped pin is pulled outwards, causing a retaining ring to compress a locking spring. At this time, the end of the T-shaped pin moves out of a fixing hole on the side wall of the support column. Rotating the sofa backrest allows for turning. Then, the T-shaped pin is released, allowing it to retract into the fixing hole under the action of the locking spring for fixation. This facilitates adjusting the sofa's orientation and prevents the sofa from rotating uncontrollably during use.
[0004] As can be seen from the above structure, its backrest is not adjustable, making it difficult to adapt to the different heights and body shapes of different users, and unable to meet the personalized backrest angle requirements. This can easily lead to back pain after sitting for a long time, reducing comfort. At the same time, the fixed backrest angle cannot flexibly adapt to different scenarios such as watching TV, working, and taking a lunch break, limiting the sofa's versatility. It is especially unfriendly to special groups such as pregnant women and people with back problems, and it is difficult to provide support that fits the body's needs. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a sofa frame structure.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A sofa frame structure includes a seat board, an adjustment component on one side of the seat board, a backrest fixedly connected to the other end of the adjustment component, a support component fixedly connected to the lower end of the seat board, and an extension component on the other side of the seat board. The adjustment component includes an adjustment groove on one side of the seat board, a shaft rotatably connected inside the adjustment groove, a mounting bracket fixedly connected to the outer side of the seat board, a transmission worm gear fixedly connected to the other end of the shaft extending into the mounting bracket, a connecting shaft rotatably connected inside the mounting bracket, a transmission worm fixedly connected to the outer surface of the connecting shaft, the transmission worm and the transmission worm gear meshing with each other, and the backrest fixedly connected to the outer surface of the shaft.
[0008] As a preferred technical solution, an upper end plate is fixedly connected to the upper part of the support component, a lower end plate is fixedly connected to the lower part of the support component, dampers are fixedly connected to both sides of the upper end of the lower end plate, and the other end of the damper is fixedly connected to the upper end plate.
[0009] As a preferred technical solution, the support assembly includes fixed support rods disposed on both sides of the lower end of the seat plate, and the lower end of the fixed support rods is connected to movable support legs via plug rods. Buffer springs are fixedly connected to the opposite ends of the fixed support rods and the movable support legs.
[0010] As a preferred technical solution, handle bars are fixedly connected to both sides of the upper end of the seat, a reinforcing rod is fixedly connected to the upper end of the seat, and the other end of the reinforcing rod is fixedly connected to the lower end of the handle bar.
[0011] As a preferred technical solution, the extension component includes a slot on the other side of the seat, a plug plate is inserted into the slot, and a buckle groove is provided on the other side of the plug plate, the buckle groove penetrating the plug plate.
[0012] As a preferred technical solution, the upper end of the insert plate is provided with an installation groove, and a support spring is fixedly connected inside the installation groove. Multiple support springs are provided, and a support plate is fixedly connected to the other end of the support spring.
[0013] As a preferred technical solution, the other end of the connecting shaft is fixedly connected to a turntable through the mounting bracket, the other end of the turntable is fixedly connected to the outer ring of a bearing, the inner ring of the bearing is fixedly connected to a handle, and the surface of the handle is provided with an anti-slip pad.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] First, this utility model, through its adjustable component, allows the connecting shaft inside the mounting frame to rotate when the backrest angle needs to be adjusted. This rotation drives the transmission worm gear on its outer surface to rotate synchronously. Since the transmission worm gear meshes with the transmission worm wheel at one end of the shaft that extends into the frame, the rotation of the transmission worm gear is converted into the rotation of the transmission worm wheel. This, in turn, drives the shaft that is fixedly connected to the transmission worm wheel to rotate in the adjustment groove on one side of the seat. Because the backrest is fixedly connected to the outer surface of the shaft, it will adjust its angle as the shaft rotates. This allows the backrest to remain stable at any adjusted angle, preventing wobbling. At the same time, the entire transmission structure is compact and hidden inside the seat and mounting frame, without affecting the appearance of the sofa.
[0016] Secondly, this utility model, through its extension component, allows the insert plate to be pulled out from the slot on the other side of the seat when the seat length needs to be extended. At this time, the slot on the insert plate allows for easy hand operation. During the pulling process, the support spring in the mounting slot will unfold synchronously with the movement of the insert plate, and the connected support plate will pop out under the elastic force of the support spring, providing effective support for the legs during use. Thus, the sofa not only meets the daily sitting needs, but also allows for reclining and resting through the seat extension, significantly increasing the sofa's practicality, allowing users to relax more comfortably, flexibly adapting to the needs of different scenarios, and improving the overall user experience. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the extension component of this utility model;
[0020] Figure 3 This is a side view of the structure of this utility model;
[0021] Figure 4 This is a utility model Figure 3 A magnified structural diagram of part A.
[0022] The components in the diagram are labeled as follows: 1. Seat; 2. Backrest; 3. Support assembly; 31. Fixed support rod; 32. Movable support leg; 33. Connecting rod; 34. Buffer spring; 4. Extension assembly; 41. Slot; 42. Insert plate; 43. Clip groove; 44. Mounting groove; 45. Support spring; 46. Support plate; 5. Adjustment assembly; 51. Adjustment groove; 52. Shaft; 53. Mounting bracket; 54. Drive worm gear; 55. Connecting shaft; 56. Drive worm; 6. Handle handle; 7. Reinforcing rod; 8. Upper end plate; 9. Lower end plate; 10. Damper; 11. Turntable; 12. Bearing; 13. Grip. Detailed Implementation
[0023] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.
[0025] Example
[0026] refer to Figures 1 to 4 This embodiment of a sofa frame structure includes a seat 1, an adjustment component 5 on one side of the seat 1, a backrest 2 fixedly connected to the other end of the adjustment component 5, a support component 3 fixedly connected to the lower end of the seat 1, and an extension component 4 on the other side of the seat 1. The adjustment component 5 includes an adjustment groove 51 on one side of the seat 1, a shaft 52 rotatably connected inside the adjustment groove 51, a mounting bracket 53 fixedly connected to the outer side of the seat 1, a transmission worm gear 54 fixedly connected to the other end of the shaft 52 extending into the mounting bracket 53, a connecting shaft 55 rotatably connected inside the mounting bracket 53, a transmission worm 56 fixedly connected to the outer surface of the connecting shaft 55, and the transmission worm 56 meshing with the transmission worm gear 54. The backrest 2 is fixedly connected to the outer surface of the shaft 52.
[0027] refer to Figure 2The upper end of the support assembly 3 is fixedly connected to an upper end plate 8, and the lower end of the support assembly 3 is fixedly connected to a lower end plate 9. Dampers 10 are fixedly connected to both sides of the upper end of the lower end plate 9, and the other end of the dampers 10 is fixedly connected to the upper end plate 8. The support assembly 3 includes fixed support rods 31 on both sides of the lower end of the seat 1. Movable support legs 32 are inserted into the lower ends of the fixed support rods 31 via insertion rods 33. Buffer springs 34 are fixedly connected to the opposite ends of the fixed support rods 31 and the movable support legs 32. When the sofa is subjected to pressure... When pressure is applied, the fixed support rods 31 and movable support legs 32 on both sides of the lower end of the seat 1 form a telescopic structure through the plug rod 33. Together with the buffer springs 34 at their opposite ends, they can initially buffer the pressure. At the same time, the damper 10 between the upper end plate 8 and the lower end plate 9 inside the support assembly 3 will play a damping role when the upper and lower end plates 9 are relatively displaced due to pressure, further absorbing and mitigating the impact. Through the elastic buffering of the spring and the shock absorption of the damper 10, stable support and vibration buffering of the sofa are achieved.
[0028] refer to Figure 1 Handlebars 6 are fixedly connected to both sides of the upper end of the seat 1. A reinforcing rod 7 is fixedly connected to the upper end of the seat 1. The other end of the reinforcing rod 7 is fixedly connected to the lower end of the handlebar 6. The handlebar 6 can prevent the sofa from falling off during use. At the same time, the pressure resistance of the handlebar 6 is increased by the action of multiple reinforcing rods 7.
[0029] refer to Figure 1 and Figure 2 The extension component 4 includes a slot 41 on the other side of the seat 1, into which a plate 42 is inserted. A groove 43 is provided on the other side of the plate 42, penetrating the plate 42. An installation groove 44 is provided at the upper end of the plate 42, and a support spring 45 is fixedly connected inside the installation groove 44. Multiple support springs 45 are provided, and a support plate 46 is fixedly connected to the other end of the support spring 45. When it is necessary to extend the length of the seat 1, the plate 42 can be pulled out from the slot 41 on the other side of the seat 1. At this time, the groove 43 on the plate 42 can be easily operated by hand. During the pulling process, the support spring 45 in the installation groove 44 will unfold synchronously with the movement of the plate 42. The support plate 46 connected to it will pop out under the elastic force of the support spring 45, which can effectively support the legs during use. Thus, the sofa can not only meet the daily sitting needs, but also achieve the function of lying down and resting by extending the seat 1.
[0030] refer to Figure 4The other end of the connecting shaft 55 passes through the mounting bracket 53 and is fixedly connected to the turntable 11. The other end of the turntable 11 is fixedly connected to the outer ring of the bearing 12. The inner ring of the bearing 12 is fixedly connected to the handle 13, and the surface of the handle 13 is provided with an anti-slip pad. By holding the handle 13, the turntable 11 is rotated, and the rotation of the turntable 11 can drive the connecting shaft 55 fixedly connected to it to rotate. Thus, with the arrangement of the handle 13 and the turntable 11, the connecting shaft 55 can be rotated easily.
[0031] Operating principle and advantages: When the sofa is subjected to pressure, the fixed support rods 31 and movable support legs 32 on both sides of the lower end of the seat 1 form a telescopic structure through the plug-in rods 33. Combined with the buffer springs 34 at their opposite ends, this structure initially buffers the pressure. Simultaneously, the damper 10 between the upper end plate 8 and the lower end plate 9 inside the support assembly 3 acts as a damper when the upper and lower end plates 9 experience relative displacement due to pressure, further absorbing and mitigating the impact. Through the elastic buffering of the springs and the shock absorption of the damper 10, stable support and vibration buffering of the sofa are achieved. When it is necessary to lie down and rest, the plug plate 42 can be pulled out from the slot 41 on the other side of the seat 1. At this time, the latch 43 on the plug plate 42 allows for easy hand operation. During the pulling process, the support spring 45 inside the mounting slot 44 moves with the plug plate 42. When unfolded synchronously, the support plate 46 connected to it pops out under the elastic force of the support spring 45, providing effective support for the legs during use. This allows the sofa to not only meet daily sitting needs but also extend to allow for reclining and resting via the seat 1. During adjustment, the connecting shaft 55 inside the drive mounting frame 53 rotates, causing the transmission worm gear 56 on its outer surface to rotate synchronously. Since the transmission worm gear 56 meshes with the transmission worm wheel 54 at one end of the shaft 52 that extends into the frame, the rotation of the transmission worm gear 56 is converted into the rotation of the transmission worm wheel 54. This, in turn, causes the shaft 52, which is fixedly connected to the transmission worm wheel 54, to rotate within the adjustment groove 51 on one side of the seat 1. The backrest 2, being fixedly connected to the outer surface of the shaft 52, adjusts its angle as the shaft 52 rotates, thereby increasing the comfort of the sofa.
[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A sofa frame structure, characterized by: The device includes a seat, an adjustment assembly on one side of the seat, a backrest fixedly connected to the other end of the adjustment assembly, a support assembly fixedly connected to the lower end of the seat, and an extension assembly on the other side of the seat. The adjustment assembly includes an adjustment groove on one side of the seat, a shaft rotatably connected inside the adjustment groove, a mounting bracket fixedly connected to the outer side of the seat, a transmission worm gear fixedly connected to the other end of the shaft extending into the mounting bracket, a connecting shaft rotatably connected inside the mounting bracket, a transmission worm fixedly connected to the outer surface of the connecting shaft, the transmission worm meshing with the transmission worm gear, and the backrest fixedly connected to the outer surface of the shaft.
2. A sofa frame structure according to claim 1, characterised in that: An upper end plate is fixedly connected to the upper part of the support assembly, and a lower end plate is fixedly connected to the lower part of the support assembly. Dampers are fixedly connected to both sides of the upper end of the lower end plate, and the other end of the damper is fixedly connected to the upper end plate.
3. A sofa frame structure according to claim 2, wherein: The support assembly includes fixed support rods on both sides of the lower end of the seat. The lower end of the fixed support rod is connected to a movable support leg via a plug rod. The opposite ends of the fixed support rod and the movable support leg are fixedly connected to a buffer spring.
4. The sofa frame structure of claim 1, wherein: Handlebars are fixedly connected to both sides of the upper end of the seat, and a reinforcing rod is fixedly connected to the upper end of the seat. The other end of the reinforcing rod is fixedly connected to the lower end of the handlebar.
5. The sofa frame structure of claim 1, wherein: The extension assembly includes a slot on the other side of the seat, into which a plate is inserted, and a buckle groove on the other side of the plate, the buckle groove penetrating the plate.
6. A sofa frame structure according to claim 5, wherein: The upper end of the insert plate is provided with an installation groove, and a support spring is fixedly connected inside the installation groove. Multiple support springs are provided, and a support plate is fixedly connected to the other end of the support spring.
7. The sofa frame structure of claim 1, wherein: The other end of the connecting shaft is fixedly connected to a turntable through the mounting bracket. The other end of the turntable is fixedly connected to the outer ring of a bearing. The inner ring of the bearing is fixedly connected to a handle, and the surface of the handle is provided with an anti-slip pad.