Forward inclination prevention structure of sofa

Abstract

The invention relates to the field of sofas, and discloses an anti-forward-leaning structure of a sofa, the anti-forward-leaning structure comprises a sofa body, a seat frame assembly, an anti-forward-leaning assembly and a leg telescopic structure are arranged in the sofa body, the anti-forward-leaning assembly comprises two supporting groups which are located on the front side of the seat frame assembly and are distributed left and right, and each supporting group comprises a supporting rod and a spring; the upper end of the supporting rod is hinged to the seat frame assembly, the lower end of the supporting rod can rotate, so that the supporting rod has a supporting state and a folded state, and the spring is arranged between the seat frame assembly and the supporting rod and pulls the supporting rod to the supporting state. When the leg telescopic structure is unfolded, the spring pulls the supporting rod to be kept in the supporting state, the forward leaning prevention function is achieved, when the leg telescopic structure is folded, the front leg placing plate in the leg telescopic structure abuts against the supporting rod to rotate backwards to be folded, the forward leaning prevention assembly in the structure is simple in structure, and no linkage assembly is arranged between the forward leaning prevention assembly and the leg telescopic structure; and the whole structure is simpler, so that the cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the field of sofas, and particularly to an anti-tipping-forward structure for a sofa. Background Art

[0002] A sofa is one of the commonly used furniture in people's daily life. There are certain safety hazards in the use of traditional sofas. When a user gets up or makes large movements on the sofa, especially when sitting at the front end of the sofa and exerting a large force, the sofa may tip forward, causing the user to fall and get injured. This safety risk is particularly prominent for the elderly, children, and people with limited mobility.

[0003] To solve this problem, some sofas with anti-tipping functions have emerged on the market. The anti-tipping structures of these sofas are linked with the telescopic leg structures of the sofas. The linkage structure is generally a connecting rod or a gear arranged between the anti-tipping structure and the leg structure. When the leg structure expands or retracts, the anti-tipping structure is driven to open or retract synchronously through the linkage structure. In actual installation and use, the setting of the linkage structure and its connection with the anti-tilting structure and the leg structure increase the overall complexity and cost of the sofa, and further improvement is needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an anti-tipping-forward structure for a sofa, which solves the problems of complex structure and high cost of the existing anti-tipping-forward structure of sofas.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An anti-tipping-forward structure for a sofa, including a sofa body. A seat frame assembly, an anti-tipping-forward assembly, and a leg telescopic structure are arranged inside the sofa body. The anti-tipping-forward assembly includes two groups of support groups distributed left and right on the front side of the seat frame assembly. Each support group includes a support rod and a spring. The upper end of the support rod is hinged to the seat frame assembly, and the lower end can rotate, enabling the support rod to have a support state and a retracted state. The spring is arranged between the seat frame assembly and the support rod, pulling the support rod to the support state. The leg telescopic structure is arranged on the front side of the seat frame assembly. When the leg telescopic structure retracts, it can abut against the support rod, causing the support rod to rotate inward to the retracted position.

[0006] Preferably, a connecting seat is arranged on the lower surface of the seat frame assembly. The connecting seat includes two side plates and a front plate. The upper end of the support rod is hinged between the two side plates. When the spring pulls the support rod to the support state, the support rod abuts against the front plate.

[0007] Preferably, a guide groove is provided on the side plate, and a guide pin is provided at a position near the upper end of the support rod. The guide pin is fitted in the guide groove.

[0008] Preferably, the middle part of the support rod is bent forward, and both ends of the spring are respectively connected to the front plate and the middle part of the support rod.

[0009] Preferably, a connecting rod is arranged between the two support groups.

[0010] Preferably, the leg telescopic structure includes a connecting group, a front leg rest plate and a rear leg rest plate. There are two sets of the connecting group, each including a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a fifth connecting rod. Among them, the rear end of the first connecting rod is hinged to the seat frame assembly, the front end of the first connecting rod is hinged to the rear end of the second connecting rod, the front end of the second connecting rod is hinged to the front leg rest plate, both ends of the fifth connecting rod are respectively hinged between the second connecting rod and the front leg rest plate, the rear end of the third connecting rod is hinged to the seat frame assembly, the front end of the third connecting rod is hinged to the rear end of the fourth connecting rod, and the front end of the fourth connecting rod is hinged to the rear leg rest plate. When the leg telescopic structure is retracted, the front leg rest plate abuts against the support rod and rotates backward to the retracted position.

[0011] Preferably, a sofa backrest is arranged on the outer wall of the sofa body, an armrest is slidably connected to the outer wall of the sofa backrest, and the outer wall of the armrest is fixedly connected to the outer wall of the sofa body.

[0012] Preferably, a support frame is arranged inside the sofa backrest, a motor is fixedly connected to the outer wall of the support frame, a threaded rod is fixedly arranged at the output end of the motor, and the outer wall of the threaded rod is rotatably connected inside the support frame.

[0013] Preferably, a connecting frame is threadedly connected to the outer wall of the threaded rod, the outer wall of the connecting frame is slidably connected inside the support frame, a chute is opened inside the support frame, and the outer wall of the connecting frame is slidably connected to the inner wall of the chute.

[0014] Preferably, a connecting column is rotatably connected inside the connecting frame, a massage roller and a gear are fixedly connected to the outer wall of the connecting column, the tooth end of the gear is meshed with a rack, the outer wall of the rack is fixedly connected to a support plate, the outer wall of the support plate is fixedly connected to the inner wall of the support frame, and the lower surface of the support plate is slidably connected to the outer wall of the connecting frame.

[0015] Working principle: when the structure is needed, when the leg telescopic structure is folded, the front legrest plate is pressed against the support rod and rotated backward to the folded position, wherein the spring is arranged between the seat frame assembly and the support rod, and the support rod is pulled to the supporting state when the support rod is not subjected to other forces, wherein the leg telescopic structure is arranged on the front side of the seat frame assembly, and when the leg telescopic structure is folded, it can press against the support rod to make the support rod rotate inward to the folded position, that is, when the connecting group is folded, the front legrest plate and the rear legrest plate are driven to fold backward, and at the same time, the front legrest plate rotates relatively with respect to the rear legrest plate, and the front legrest plate is pressed against the support rod and folded backward synchronously, when the connecting group is completely folded, the front legrest plate and the rear legrest plate form an angle of nearly 90°, and the front legrest plate pushes the support rod upward, so that the support rod is folded and pressed against the lower side position of the seat frame assembly; When the connection group switches from the folded state to the expanded state, the connection group drives the front leg rest and the rear leg rest to turn outward and move forward. After the support rod loses the pressure of the front leg rest, it rotates outward to the supporting position under the action of the spring, thereby preventing the forward tilting effect. In this structure, the anti-forward tilting component itself has a simple structure, and secondly, no linkage component is arranged between the leg telescopic structure, which makes the entire structure simpler and further reduces the cost.

[0016] When a person lies on the sofa body, his back will be tightly pressed against the sofa back, and then the motor is started, the motor drives the threaded rod to rotate in the support frame, and the threaded rod drives the connecting frame to slide in the slide groove, and then the connecting frame can drive the gear to rotate on the rack during the sliding process, so that under the meshing connection of the gear and the rack, the connecting column can be driven to rotate in the connecting frame, and then driven by the connecting column, the massage roller can be driven to rotate, and then the back of the person on the seat frame assembly can be rolled and massaged, thereby achieving the effect of massaging various parts of the user's back.

[0017] The present invention provides a sofa anti-tilt structure, which has the following beneficial effects: 1. In the present invention, when the telescopic leg structure is unfolded, the spring pulls the support rod to remain in the supporting state, thereby realizing the anti-tilt function. When the telescopic leg structure is folded, the front legrest in the telescopic leg structure rotates backward against the support rod and folds. In this structure, the anti-tilt component itself has a simple structure, and secondly, no linkage component is provided between the telescopic leg structure, which makes the entire structure simpler, thereby further reducing the cost.

[0018] 2. When the connection group of the present invention switches from the folded state to the unfolded state, the connection group drives the front legrest and the rear legrest to turn outward and move forward. After the support rod loses the pressure of the front legrest, it rotates outward to the supporting position under the action of the spring, thereby achieving the effect of preventing forward tilt.

[0019] 3. In the present invention, the motor drives the threaded rod to rotate in the support frame, thereby driving the connection frame to slide in the chute and driving the gear to rotate on the rack at the same time. Driven by the connecting column, the massage roller can be driven to rotate, so as to roll and massage the back of the person on the seat frame assembly, thereby achieving the effect of massaging various parts of the user's back. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a schematic diagram of the sofa backrest of the present invention; Figure 3 is a schematic diagram of the seat frame assembly of the present invention; Figure 4 is another schematic diagram of the anti-tipping structure of the sofa of the present invention; Figure 5 is a schematic diagram of the support rod in the retracted state in the anti-tipping structure of the sofa of the present invention; Figure 6 is a schematic diagram of the massage roller of the present invention; Figure 7 is a schematic diagram of the support frame of the present invention; Figure 8 is a schematic diagram of the connection frame of the present invention.

[0021] Among them, 1. Seat frame assembly; 2. Leg telescopic structure; 21. Connection group; 211. First connecting rod; 212. Second connecting rod; 213. Third connecting rod; 214. Fourth connecting rod; 215. Fifth connecting rod; 22. Rear leg rest plate; 23. Front leg rest plate; 3. Support group; 31. Support rod; 311. Intermediate part; 32. Spring; 33. Connecting rod; 4. Connection seat; 41. Side plate; 42. Front plate; 411. Guide groove; 5. Sofa body; 6. Sofa backrest; 7. Armrest; 8. Support frame; 9. Motor; 10. Threaded rod; 11. Connection frame; 12. Connecting column; 13. Massage roller; 14. Gear; 15. Rack; 16. Support plate; 17. Chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to the attached Figure 1 - attached Figure 5, An anti-tipping forward structure for a sofa is provided in an embodiment of the present invention, which includes a sofa body 5. Inside the sofa body 5, a seat frame assembly 1, an anti-tipping forward assembly, and a leg telescopic structure 2 are provided. The anti-tipping forward assembly includes two sets of support groups 3 that are distributed left and right on the front side of the seat frame assembly 1. Each set of support groups 3 includes a support rod 31 and a spring 32. The upper end of the support rod 31 is hinged to the seat frame assembly 1, and the lower end is rotatable, enabling the support rod 31 to have a supporting state and a retracted state. The spring 32 is arranged between the seat frame assembly 1 and the support rod 31, pulling the support rod 31 to the supporting state. The leg telescopic structure 2 is arranged on the front side of the seat frame assembly 1. When the leg telescopic structure 2 is retracted, it can abut against the support rod 31, causing the support rod 31 to rotate inwards to the retracted position.

[0024] Specifically, the anti-tipping forward assembly includes two sets of support groups 3 that are distributed left and right on the front side of the seat frame assembly 1. Each set of support groups 3 includes a support rod 31 and a spring 32. The upper end of the support rod 31 is hinged to the seat frame assembly 1, and the lower end, i.e., the end facing away from the seat frame assembly 1, is rotatable. After rotation, the support rod 31 can form a supporting state and a retracted state. In the supporting state, the end of the support rod 31 facing away from the seat frame assembly 1 extends downwards. When the sofa tips forward, the lower end of the support rod 31 can support on the ground, achieving the effect of preventing forward tipping. In the retracted state, the end of the support rod 31 facing away from the seat frame assembly 1 rotates backwards and retracts on the lower surface of the seat frame assembly 1. The spring 32 is arranged between the seat frame assembly 1 and the support rod 31, pulling the support rod 31 to the supporting state when the support rod 31 is not subjected to other forces. The leg telescopic structure 2 is arranged on the front side of the seat frame assembly 1. When the leg telescopic structure 2 is retracted, it can abut against the support rod 31, causing the support rod 31 to rotate inwards to the retracted position.

[0025] Please refer to the attached Figure 3 - attached Figure 5 , a connecting seat 4 is arranged on the lower surface of the seat frame assembly 1. The connecting seat 4 includes two side plates 41 and a front plate 42. The upper end of the support rod 31 is hinged between the two side plates 41. When the spring 32 pulls the support rod 31 to the supporting state, the support rod 31 abuts against the front plate 42.

[0026] Specifically, the seat frame assembly 1 is a prior art, and its structure is not introduced in detail in this embodiment. The connecting seat 4 is fixed on the lower surfaces of the left and right sides on the front side of the seat frame assembly 1 by welding or bolt connection. The connecting seat 4 includes two side plates 41 and a front plate 42. The upper end of the support rod 31 is inserted between the two side plates 41 and is hinged to the two side plates 41 through a pin shaft to achieve the rotation function. When the spring 32 pulls the support rod 31 to the supporting state, the support rod 31 abuts against the front plate 42 to maintain stability and play a role in preventing forward tipping.

[0027] Please refer to the attached Figure 3 - attached Figure 5, a guide groove 411 is provided on the side plate 41, and a guide pin is provided at a position near the upper end of the support rod 31. The guide pin is fitted in the guide groove 411; the middle part 311 of the support rod 31 is bent forward; both ends of the spring 32 are respectively connected to the front plate 42 and the middle part 311 of the support rod 31; a connecting rod 33 is provided between the two support groups 3; the leg telescopic structure 2 includes a connecting group 21, a front leg rest plate 23 and a rear leg rest plate 22. There are two sets of connecting groups 21, each including a first connecting rod 211, a second connecting rod 212, a third connecting rod 213, a fourth connecting rod 214 and a fifth connecting rod 215. Among them, the rear end of the first connecting rod 211 is hinged to the seat frame assembly 1, the front end of the first connecting rod 211 is hinged to the rear end of the second connecting rod 212, the front end of the second connecting rod 212 is hinged to the front leg rest plate 23, both ends of the fifth connecting rod 215 are respectively hinged between the second connecting rod 212 and the front leg rest plate 23, the rear end of the third connecting rod 213 is hinged to the seat frame assembly 1, the front end of the third connecting rod 213 is hinged to the rear end of the fourth connecting rod 214, and the front end of the fourth connecting rod 214 is hinged to the rear leg rest plate 22. When the leg telescopic structure 2 is retracted, the front leg rest plate 23 abuts against the support rod 31 and rotates backward to the retracted position.

[0028] Specifically, when the leg telescopic structure 2 is retracted, the front leg rest plate 23 abuts against the support rod 31 and rotates backward to the retracted position, that is, when the connecting group 21 is retracted, it drives the front leg rest plate 23 and the rear leg rest plate 22 to retract backward. At the same time, the front leg rest plate 23 rotates relative to the rear leg rest plate 22, and the front leg rest plate 23 abuts against the support rod 31 and retracts backward synchronously. When the connecting group 21 is completely retracted, the front leg rest plate 23 and the rear leg rest plate 22 form an angle close to 90°, and the front leg rest plate 23 pushes the support rod 31 upward, so that the support rod 31 retracts and abuts against the lower side position of the seat frame assembly 1; when the connecting group 21 switches from the retracted state to the unfolded state, the connecting group 21 drives the front leg rest plate 23 and the rear leg rest plate 22 to turn outwards and move forward. After the support rod 31 loses the pressing force of the front leg rest plate 23, it rotates outward to the support position under the action of the spring 32, playing an anti-tipping effect. In this structure, the anti-tipping component itself has a simple structure. Secondly, no linkage component is provided between the anti-tipping component and the leg telescopic structure 2, making the whole structure simpler, and further reducing the cost. Among them, through the guide groove 411 and the guide pin, the stability of the support rod 31 during rotation and in the support state can be improved. The middle part 311 of the support rod 31 is bent forward, which can play an avoidance role in the retracted state. The spring 32 provides a pulling force for the support rod 31 to rotate forward. A connecting rod 33 is provided between the support rods 31 of the two support groups 3 to ensure the synchronous movement of the two support groups 3 and improve the stability.

[0029] Please refer to the appendix Figure 1 and the appendix Figure 2, an outer wall of the sofa body 5 is provided with a sofa backrest 6, an outer wall of the sofa backrest 6 is slidably connected with an armrest 7, and an outer wall of the armrest 7 is fixedly connected to the outer wall of the sofa body 5.

[0030] Specifically, the sofa backrest 6 is hinged to the seat frame assembly 1, and the armrest 7 is used to enhance the overall stability. The armrest 7 can also improve the comfort and convenience of the overall use of the sofa body 5. The sofa backrest 6 can rotate around the sofa body 5, enhancing the flexibility of the overall use.

[0031] Please refer to the appendix Figure 2 , appendix Figure 6 , appendix Figure 7 and appendix Figure 8 , a support frame 8 is arranged inside the sofa backrest 6, a motor 9 is fixedly connected to an outer wall of the support frame 8, an output end of the motor 9 is fixedly provided with a threaded rod 10, and an outer wall of the threaded rod 10 is rotatably connected inside the support frame 8; a connecting frame 11 is threadedly connected to the outer wall of the threaded rod 10, an outer wall of the connecting frame 11 is slidably connected inside the support frame 8, a chute 17 is formed inside the support frame 8, and an outer wall of the connecting frame 11 is slidably connected to an inner wall of the chute 17; a connecting column 12 is rotatably connected inside the connecting frame 11, a massage roller 13 and a gear 14 are fixedly connected to an outer wall of the connecting column 12, a tooth end of the gear 14 is meshed with a rack 15, an outer wall of the rack 15 is fixedly connected to a support plate 16, an outer wall of the support plate 16 is fixedly connected to an inner wall of the support frame 8, and a lower surface of the support plate 16 is slidably connected to an outer wall of the connecting frame 11.

[0032] Specifically, the sofa backrest 6 is used to support and limit the support frame 8, the support frame 8 is used to support and fix the motor 9, the motor 9 is used to drive the threaded rod 10 to rotate in the support frame 8, and the support frame 8 also plays a role in supporting and limiting the rotation of the threaded rod 10, so as to ensure the stability of the threaded rod 10 during the process. The threaded rod 10 is used to drive the connecting frame 11 to slide in the chute 17. The chute 17 in the support frame 8 plays a role in limiting the connecting frame 11 and provides a track for the movement of the connecting frame 11, ensuring the stability of the connecting frame 11 during the sliding process. During the sliding process of the connecting frame 11, the connecting frame 11 can drive the gear 14 to rotate on the rack 15. Under the meshing connection of the gear 14 and the rack 15, the connecting column 12 can be driven to rotate in the connecting frame 11. Driven by the connecting column 12, the massage roller 13 can be driven to rotate, and then the back of the person on the seat frame assembly 1 can be massaged by rolling.

[0033] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sofa anti-tilt structure, comprising a sofa body (5), characterized in that: The sofa body (5) is provided with a seat frame assembly (1), an anti-tilt assembly and a leg telescopic structure (2) inside. The anti-tilt assembly comprises two support groups (3) located on the front side of the seat frame assembly (1) and distributed on the left and right sides. Each support group (3) comprises a support rod (31) and a spring (32). The upper end of the support rod (31) is hinged to the seat frame assembly (1), and the lower end can rotate so that the support rod (31) has a supporting state and a retracted state. The spring (32) is arranged between the seat frame assembly (1) and the support rod (31) to pull the support rod (31) to the supporting state. The leg telescopic structure (2) is arranged on the front side of the seat frame assembly (1). When the leg telescopic structure (2) is retracted, it can press against the support rod (31) to make the support rod (31) rotate inward to the retracted position.

2. The anti-tilt structure of a sofa according to claim 1, characterized in that: A connecting seat (4) is provided on the lower surface of the seat frame assembly (1), the connecting seat (4) comprising two side plates (41) and a front plate (42), the upper end of the support rod (31) is hinged between the two side plates (41), and when the spring (32) pulls the support rod (31) to a supporting state, the support rod (31) abuts against the front plate (42).

3. The anti-forward tilt structure of a sofa according to claim 2, characterized in that: A guide groove (411) is provided on the side plate (41), and a guide pin is provided at a position close to the upper end of the support rod (31), wherein the guide pin is fitted in the guide groove (411).

4. The anti-forward tilt structure of a sofa according to claim 2, characterized in that: The middle portion (311) of the support rod (31) is bent forward, and two ends of the spring (32) are respectively connected to the front plate (42) and the middle portion (311) of the support rod (31).

5. The anti-forward tilt structure of a sofa according to claim 1, characterized in that: A connecting rod (33) is provided between the two support groups (3).

6. The anti-forward tilt structure of a sofa according to claim 1, characterized in that: The leg telescopic structure (2) comprises a connection group (21), a front legrest plate (23) and a rear legrest plate (22); the connection group (21) comprises two groups, each group comprising a first connecting rod (211), a second connecting rod (212), a third connecting rod (213), a fourth connecting rod (214) and a fifth connecting rod (215); wherein the rear end of the first connecting rod (211) is hinged to the seat frame assembly (1); the front end of the first connecting rod (211) is hinged to the rear end of the second connecting rod (212); and the second connecting rod (212) is hinged to the rear end of the second connecting rod (212). The front end of the fifth connecting rod (215) is hinged to the front legrest plate (23), the two ends of the fifth connecting rod (215) are respectively hinged between the second connecting rod (212) and the front legrest plate (23), the rear end of the third connecting rod (213) is hinged to the seat frame assembly (1), the front end of the third connecting rod (213) is hinged to the rear end of the fourth connecting rod (214), the front end of the fourth connecting rod (214) is hinged to the rear legrest plate (22), and when the leg telescopic structure (2) is folded, the front legrest plate (23) is pressed against the support rod (31) and rotated backward to the folded position.

7. The anti-forward tilt structure of a sofa according to claim 1, characterized in that: The outer wall of the sofa body (5) is provided with a sofa backrest (6), the outer wall of the sofa backrest (6) is slidably connected to an armrest (7), and the outer wall of the armrest (7) is fixedly connected to the outer wall of the sofa body (5).

8. The anti-forward tilt structure of a sofa according to claim 7, characterized in that: A support frame (8) is arranged inside the sofa backrest (6); a motor (9) is fixedly connected to the outer wall of the support frame (8); a threaded rod (10) is fixedly arranged at the output end of the motor (9); and the outer wall of the threaded rod (10) is rotatably connected to the inside of the support frame (8).

9. The anti-forward tilt structure of a sofa according to claim 8, characterized in that: The outer wall of the threaded rod (10) is threadedly connected to a connecting frame (11), the outer wall of the connecting frame (11) is slidably connected to the inside of the supporting frame (8), a sliding groove (17) is provided inside the supporting frame (8), and the outer wall of the connecting frame (11) is slidably connected to the inner wall of the sliding groove (17).

10. The anti-forward tilt structure of a sofa according to claim 9, characterized in that: The connection frame (11) is rotatably connected to a connection column (12) inside, the outer wall of the connection column (12) is fixedly connected to a massage roller (13) and a gear (14), the tooth end of the gear (14) is meshingly connected to a rack (15), the outer wall of the rack (15) is fixedly connected to a support plate (16), the outer wall of the support plate (16) is fixedly connected to the inner wall of the support frame (8), and the lower surface of the support plate (16) is slidably connected to the outer wall of the connection frame (11).

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