Self-gravity multi-angle control mechanism and sofa

Abstract

The utility model discloses a kind of self-gravity multi-angle control mechanism and sofa.The mechanism includes the upper swing plate, lower swing plate connected by swing shaft rotation, and upper swing plate is equipped with base;Multi-angle limiting component includes ratchet plate fixed in lower swing plate, ratchet pawl rotationally arranged in upper swing plate and conversion spring;Angle control component is adjusted the pulling direction of conversion spring to ratchet pawl by driving connecting piece, driving follower and driving piece, so that it is engaged or separated with ratchet tooth.Ratchet pawl is engaged with ratchet tooth, upper swing plate can be unidirectionally rotated and realized multi-angle stepless regulation and self locking under the action of user gravity;When ratchet pawl is separated with ratchet tooth, upper swing plate can be freely rotated and automatically reset by reset spring.The mechanism can also integrate backrest component, and linkage sequence control of backrest angle adjustment and base swing is realized by the sitting posture limiting plate and driving connecting piece coaxially arranged.The utility model has gravity self-adaption, labor-saving operation, angle adjustment flexible, locking reliable and compact structure and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a self-gravity multi-angle control mechanism and a sofa. Background Technology

[0002] Currently, with increasing work pressure, especially for those who sit for long periods, taking a break on a sofa or chair to relax has become the norm.

[0003] Existing sofas and chairs typically have an internal electric or manual mechanical extension mechanism that allows for adjustment and switching between different states.

[0004] Manual reclining sofas typically open the leg rests by pulling a cable or handle on the side of the armrest, then lean the upper body against the sofa back to recline and achieve a lying position. The entire process is instantaneous, but only one reclining angle is available, which cannot meet the diverse adjustment needs of different users. Utility Model Content

[0005] This utility model provides a gravity-based multi-angle control mechanism and sofa, aiming to solve the problem that in the existing technology, when manually adjusting the backrest of a sofa, there is only one reclining posture, which cannot meet the user's needs for adjusting to different angles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, embodiments of the present invention provide a gravity-based multi-angle control mechanism, comprising: A rocking assembly, comprising a lower rocking plate and an upper rocking plate rotatably connected to each other, the upper rocking plate being provided with a base; A multi-angle limiting assembly includes a ratchet plate, a ratchet pawl, and a conversion spring; the ratchet plate is fixedly connected to the lower swing plate, and the ratchet plate is provided with a plurality of ratchet teeth that cooperate with the ratchet pawl; the ratchet pawl is rotatably mounted on the upper swing plate; the conversion spring is used to pull the ratchet pawl, so that the ratchet pawl engages or disengages from the ratchet teeth; An angle control component is provided to control the angle at which the conversion spring pulls the ratchet pawl, causing the conversion spring to engage or disengage the ratchet pawl with the ratchet teeth. When the ratchet pawl disengages from the ratchet teeth, the upper swing plate can rotate freely relative to the lower swing plate. When the ratchet pawl engages with the ratchet teeth, the upper swing plate rotates unidirectionally relative to the lower swing plate, and the ratchet pawl engages with several ratchet teeth in sequence.

[0007] In one embodiment, the angle control component includes a drive connector, a drive follower, and a drive member; The drive connector is rotatably mounted on the base; The two ends of the driven driven member are respectively connected to the driven connecting member and the driven member; The driving component is provided with a rotating structure, and the driving component rotates around the rotating structure; one end of the conversion spring is connected to the driving component, and the other end is connected to the ratchet pawl.

[0008] In one embodiment, an upper limit pin and a lower limit pin are respectively provided on both sides of the ratchet pawl; the ratchet pawl rotates between the upper limit pin and the lower limit pin.

[0009] In one embodiment, the ratchet pawl and the drive member rotate about the same center.

[0010] In one embodiment, it further includes a backrest assembly and a backrest control assembly, the backrest assembly including a backrest panel, a mounting member, and a support member; The backrest is rotatably connected to the base. The support member is rotatably connected to the end of the base away from the backrest. The base is provided with a limit groove, and the support member is provided with a sitting posture limit pin that cooperates with the limit groove. One end of the mounting component is rotatably connected to the end of the support component away from the base, and the other end of the mounting component is rotatably connected to the backrest panel; The backrest control assembly includes a posture limiting plate for pushing the posture limiting pin to slide along the limiting groove.

[0011] In one embodiment, a buffer spring is connected between the support member and the base.

[0012] In one embodiment, the sitting posture limiting plate and the drive connector are coaxially arranged.

[0013] In one embodiment, the mounting component is provided with an auxiliary limiting pin, and the base is provided with an auxiliary limiting groove that cooperates with the auxiliary limiting pin; When the backrest panel rotates relative to the base, the backrest panel stops rotating when the auxiliary limiting pin engages with the auxiliary limiting groove.

[0014] In one embodiment, the upper swing plate and the lower swing plate are rotatably connected by a swing shaft; Two return springs are abutted between the upper swing plate and the lower swing plate, and the two return springs are arranged on both sides of the swing shaft.

[0015] In a second aspect, this utility model embodiment also provides a sofa, including a sofa body, wherein the above-mentioned self-weight multi-angle control mechanism is provided on both sides of the sofa body.

[0016] In one embodiment, a sofa includes a sofa body, and the aforementioned gravity multi-angle control mechanism is provided on both sides of the sofa body; the drive connectors of the gravity multi-angle control mechanisms on both sides of the sofa body are fixedly connected by the same drive rod; rotating the drive connector of the gravity multi-angle control mechanism on one side can drive the drive connector of the gravity multi-angle control mechanism on the other side to rotate via the drive rod.

[0017] In one embodiment, the drive connector of the gravity multi-angle control mechanism on one side is connected to the control handle.

[0018] The beneficial effects of this utility model compared with the prior art are as follows: In the non-working state, the angle control component controls the angle of the ratchet pawl pulled by the conversion spring, so that the ratchet pawl and the ratchet plate are separated, and the upper swing plate can swing relative to the lower swing plate. Therefore, within a certain angle range, the base can swing with the upper swing plate within a certain range to adjust the tilt angle of the sofa body.

[0019] In operation, the angle control component adjusts the angle of the ratchet pawl pulled by the conversion spring, causing the ratchet pawl to engage with the ratchet teeth. At this time, with the cooperation of the ratchet pawl and ratchet teeth, the ratchet pawl can only move unidirectionally along a number of ratchet teeth, and the upper swing plate can only rotate in one direction relative to the lower swing plate. When the user sits on the sofa body, by adjusting their center of gravity, the upper swing plate rotates unidirectionally relative to the lower swing plate under the action of their own gravity. The ratchet pawl slowly engages with a number of ratchet teeth in one direction. After adjusting to a suitable angle, the user adjusts their center of gravity again, causing the ratchet pawl to stop moving along a number of ratchet teeth. At this time, the ratchet pawl is locked in the ratchet teeth, and the upper swing plate stops rotating relative to the lower swing plate.

[0020] Therefore, by sequentially engaging the ratchet pawl with multiple ratchet teeth, the backrest angle can be flexibly and stably fixed between multiple positions, meeting the diverse comfort needs of users.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of a sofa provided for an embodiment of this utility model; Figure 2A front view of a gravity multi-angle control mechanism in its initial state, provided for an embodiment of this utility model; Figure 3 A rear view of a gravity multi-angle control mechanism in its initial state, provided for an embodiment of this utility model; Figure 4 for Figure 3 A magnified view of a portion of the image; Figure 5 A front view of a gravity multi-angle control mechanism in a backrest adjustment state, provided by an embodiment of this utility model; Figure 6 A rear view of a self-gravity multi-angle control mechanism in a backrest adjustment state, provided for an embodiment of this utility model; Figure 7 A front view of a first state diagram of a gravity multi-angle control mechanism in a lying posture adjustment state, provided for an embodiment of this utility model; Figure 8 A rear view of the first state diagram of a gravity multi-angle control mechanism in a lying posture adjustment state, provided for an embodiment of this utility model; Figure 9 A front view of the second state diagram of a gravity multi-angle control mechanism in a lying posture adjustment state, provided by an embodiment of this utility model; Figure 10 A rear view of the second state diagram of a gravity multi-angle control mechanism in a lying posture adjustment state, provided for an embodiment of this utility model; Figure 11 A three-dimensional structural diagram of a swing component of a self-gravity multi-angle control mechanism provided for an embodiment of this utility model; Figure 12 This is a three-dimensional structural diagram of a self-gravity multi-angle control mechanism swing assembly after removing the upper swing plate, provided for an embodiment of this utility model.

[0023] Figure label: 1. Swing assembly; 11. Lower swing plate; 12. Upper swing plate; 13. Swing shaft; 14. Forward swing limit; 15. Backward swing limit; 16. Return spring. 2. Base; 21. Limiting groove; 22. Auxiliary limiting groove; 3. Multi-angle limiting assembly, 31. Ratchet plate, 311. Ratchet tooth, 32. Ratchet pawl, 33. Conversion spring; 4. Angle control assembly; 41. Drive connector; 411. Drive connector piece; 42. Drive follower; 421. Second hinge hole; 422. Third hinge hole; 43. Drive component; 44. First rotating shaft; 441. Step screw; 45. Upper limit pin; 46. Lower limit pin. 5. Backrest assembly; 51. Backrest panel; 52. Mounting component; 521. Auxiliary limiting pin; 53. Support component; 531. Seating posture limiting pin; 54. Buffer spring. 6. Backrest control assembly; 61. Seating posture limit plate; 611. Locking part; 7. Drive lever; 8. Control handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model embodiment provides a gravity multi-angle control mechanism, including: A rocking assembly 1, comprising a lower rocking plate 11 and an upper rocking plate 12 rotatably connected to each other, wherein the upper rocking plate 12 is provided with a base 2; the base 2 is fixedly connected to the upper rocking plate 12. The multi-angle limiting component 3 includes a ratchet plate 31, a ratchet pawl 32, and a conversion spring 33; the ratchet plate 31 is fixedly connected to the lower swing plate 11, and the ratchet plate 31 is provided with a plurality of ratchet teeth 311 that cooperate with the ratchet pawl 32; the ratchet pawl 32 is rotatably mounted on the upper swing plate 12; the conversion spring 33 is used to pull the ratchet pawl 32, so that the ratchet pawl 32 engages or disengages from the ratchet teeth 311; An angle control component 4 is used to control the angle at which the conversion spring 33 pulls the ratchet pawl 32, so that the conversion spring 33 pulls the ratchet pawl 32 to engage or disengage with the ratchet teeth 311; when the ratchet pawl 32 disengages from the ratchet teeth 311, the upper swing plate 12 can rotate freely relative to the lower swing plate 11; when the ratchet pawl 32 engages with the ratchet teeth 311, the upper swing plate 12 can rotate unidirectionally relative to the lower swing plate 11, and the ratchet pawl 32 engages with a plurality of ratchet teeth 311 in sequence.

[0029] The gravity-driven multi-angle control mechanism in this embodiment can be installed on many types of furniture. When the gravity-driven multi-angle control mechanism is installed on a sofa, the sofa body is installed on the base 2. The ratchet pawl 32 and the ratchet plate 31 are respectively set on the upper swing plate 12 and the lower swing plate 11. Through the cooperation of the ratchet pawl 32 and the ratchet plate 31, the relative fixation between the upper swing plate 12 and the lower swing plate 11 can be achieved, thereby controlling the swing angle of the base 2, and thus automatically adjusting the tilt angle of the sofa.

[0030] Specifically, in the non-working state, the angle control component 4 controls the conversion spring 33 to pull the angle of the ratchet pawl 32, so that the ratchet pawl 32 and the ratchet plate 31 are separated, and the upper swing plate 12 can swing relative to the lower swing plate 11. Therefore, within a certain angle range, the base 2 can swing with the upper swing plate 12 within a certain range to adjust the tilt angle of the sofa body.

[0031] In operation, the angle control component 4 adjusts the angle of the ratchet pawl 32 by the conversion spring 33, causing the ratchet pawl 32 to engage with the ratchet teeth 311. At this time, with the cooperation of the ratchet pawl 32 and the ratchet teeth 311, the ratchet pawl 32 can only move unidirectionally along several ratchet teeth 311, and the upper swing plate 12 can only rotate in one direction relative to the lower swing plate 11. When the user sits on the sofa body, by adjusting their center of gravity, the upper swing plate 12 rotates unidirectionally relative to the lower swing plate 11 under the action of their own weight. The ratchet pawl 32 slowly engages with several ratchet teeth 311 in one direction. After adjusting to a suitable angle, the user adjusts their center of gravity again, causing the ratchet pawl 32 to stop moving along the ratchet teeth 311. At this point, the ratchet pawl 32 is locked within the ratchet teeth 311, and the upper swing plate 12 stops rotating relative to the lower swing plate 11.

[0032] In other words, when the ratchet pawl 32 and ratchet teeth 311 are engaged in this embodiment, although they can move in one direction, when the center of gravity of the human body falls within a certain range, the ratchet pawl 32 can maintain engagement with the ratchet teeth 311 at that time, thus fixing the upper swing plate 12 and stopping its rotation. When the center of gravity of the human body exceeds a certain range, the ratchet pawl 32 can slide along the ratchet teeth 311. Therefore, during the manufacturing process, the depth of each ratchet tooth 311 can be set to increase the resistance when the ratchet pawl 32 slides past the current ratchet tooth 311 to the adjacent ratchet tooth 311, so that the user is less likely to trigger the sliding of the ratchet pawl 32 within a certain range.

[0033] In this embodiment, as Figure 3 and Figure 4 As shown, the angle control component 4 includes a drive connector 41, a drive follower 42, and a drive component 43; The drive connector 41 is rotatably mounted on the base 2; The two ends of the driven follower 42 are respectively connected to the driven connector 41 and the driving member 43; The driving component 43 is provided with a rotating structure, and the driving component 43 rotates around the rotating structure; one end of the conversion spring 33 is connected to the driving component 43, and the other end is connected to the ratchet pawl 32, and the conversion spring 33 is always in a tensile state.

[0034] In this embodiment, a first through hole is provided on the base 2, and a drive connecting shaft is fixedly provided on the drive connector 41. The drive connecting shaft cooperates with the first through hole, so that the drive connector 41 rotates on the base 2.

[0035] A drive connecting piece 411 is provided on the drive connector 41, and a first hinge hole is provided on the drive connecting piece 411.

[0036] The driven follower 42 is provided with a second hinge hole 421 and a third hinge hole 422 at both ends.

[0037] The drive component 43 is also provided with a fourth hinge hole and a fifth hinge hole.

[0038] The first hinge hole and the second hinge hole 421 are coaxially connected by a hinge shaft, so that the drive connector 41 and the drive follower 42 are rotatably connected.

[0039] The third hinge hole 422 and the fourth hinge hole are coaxially connected by a connecting shaft, so that the driven follower 42 and the driving member 43 are rotatably connected.

[0040] In this embodiment, a first rotating shaft 44 is provided on the upper swing plate 12, and a fifth hinge hole is rotatably disposed on the first rotating shaft 44. The first rotating shaft 44 and the fifth hinge hole cooperate to form a rotating structure, so that the driving member 43 can rotate around the first rotating shaft 44.

[0041] In this embodiment, the ratchet pawl 32 is also rotatably mounted on the first rotating shaft 44, allowing the ratchet pawl 32 to rotate around the first rotating shaft 44. This enables the ratchet pawl 32 and the driving member 43 to rotate around the same center (the first rotating shaft 44). The coaxial arrangement of the ratchet pawl 32 and the driving member 43 makes the overall structure more compact.

[0042] In this embodiment, in order to ensure that the rotation of the ratchet pawl 32 and the rotation of the drive member 43 do not interfere with each other, the first rotating shaft 44 is set as a stepped screw 441, and the drive member 43 and the ratchet pawl 32 respectively cooperate with different steps of the stepped screw 441.

[0043] Therefore, when the drive connector 41 rotates, it can drive the driven follower 42 to move, and the driven follower 42 in turn drives the drive member 43 to rotate. This allows the drive member 43 to adjust the angle at which the conversion spring 33 pulls the ratchet pawl 32, so that the conversion spring 33 can engage or disengage with the ratchet teeth 311.

[0044] In addition, in order to limit the rotation angle of the ratchet pawl 32, an upper limit pin 45 and a lower limit pin 46 are respectively provided on both sides of the ratchet pawl 32, and the upper limit pin 45 and the lower limit pin 46 are fixedly mounted on the upper swing plate 12; so that the ratchet pawl 32 swings between the upper limit pin 45 and the lower limit pin 46.

[0045] In a further embodiment, a backrest assembly 5 and a backrest control assembly 6 are also provided. The backrest control assembly 6 allows adjustment of the angle of the backrest assembly 5, improving the user's comfort and enhancing the user experience.

[0046] In this embodiment, specifically, as follows: Figure 2 As shown, the backrest assembly 5 includes a backrest panel 51, a mounting component 52, and a support component 53; The backrest panel 51 is rotatably connected to the base 2; The support member 53 is rotatably connected to the end of the base 2 away from the backrest 51. The base 2 is provided with a limiting groove 21, and the support member 53 is provided with a sitting posture limiting pin 531 that cooperates with the limiting groove 21. One end of the mounting component 52 is rotatably connected to the end of the support component 53 away from the base 2, and the other end of the mounting component 52 is rotatably connected to the backrest plate 51; The backrest control assembly 6 includes a sitting posture limiting plate 61 for pushing the sitting posture limiting pin 531 to slide along the limiting groove 21.

[0047] In this embodiment, the support member 53 is rotatably connected to the base 2 via a hinge shaft. The limiting groove 21 is an arc shape set around the rotation center of the support member 53, so that when the support member 53 rotates, the sitting posture limiting pin 531 can slide within the limiting groove 21. At the same time, the limiting groove 21 restricts the rotation angle of the sitting posture limiting pin 531, so that the sitting posture limiting pin 531 can only rotate within the limiting groove 21.

[0048] A latching portion 611 is provided on the sitting posture limiting plate 61 to cooperate with the sitting posture limiting pin 531, such as Figure 2 As shown, when the latch 611 engages with the sitting posture limiting pin 531, the sitting posture limiting pin 531 is restricted to the end of the limiting groove 21. At this time, the support member 53 cannot rotate around the base 2, and the support member 53 is in a limited position. At the same time, the backrest 51, the mounting member 52 and the support member 53 are all in a fixed state.

[0049] When the posture of the backrest 51 needs to be adjusted, such as Figure 5 and Figure 6 As shown, rotating the sitting posture limiting plate 61 separates the latch 611 from the sitting posture limiting pin 531. At this time, the sitting posture limiting pin 531 loses the limiting function of the sitting posture limiting plate 61 and can slide in the limiting groove 21. The support member 53 rotates, and the mounting member 52 moves towards the backrest plate 51. At this time, the backrest plate 51 can rotate backward relative to the base 2, thereby adjusting the angle of the backrest plate 51.

[0050] In a further embodiment, a buffer spring 54 is connected between the support member 53 and the base 2.

[0051] The two ends of the buffer spring 54 are connected to the support member 53 and the base 2, so that when the backrest 51 leans back, the buffer spring 54 can provide traction to the support member 53 to prevent the backrest 51 from leaning back too quickly.

[0052] In a further embodiment, the sitting posture limiting plate 61 is coaxially arranged with the drive connector 41.

[0053] In this embodiment, the drive connector 41 is coaxially arranged with the seating position limiting plate 61, and the seating position limiting plate 61 is fixedly connected to the drive connecting shaft on the drive connector 41. The seating position limiting plate 61 and the drive connector 41 are respectively arranged on both sides of the base 2.

[0054] In other words, when one of the components, the drive connector 41 or the seating position limiting plate 61, rotates, the other component will also rotate at the same time, making the overall structure more compact.

[0055] It should be noted that the seating position limiting plate 61 is used to control the rotation of the backrest 51, while the drive connector 41 is used to control the engagement and disengagement of the ratchet pawl 32 and the ratchet tooth 311. To prevent the seating position limiting plate 61 and the drive connector 41 from simultaneously controlling the backrest 51 and the ratchet pawl 32, in this embodiment, the seating position limiting plate 61 and the drive connector 41 are staggered, resulting in a time difference between the control of the backrest 51 and the ratchet pawl 32. That is, in the initial position, the seating position limiting plate 61 limits the seating position limiting pin 531, at which time the backrest 51 is in the initial position, and the conversion spring 33 pulls the ratchet pawl 32, causing the ratchet pawl 32 to disengage from the ratchet tooth 311. Then, rotating the seating position limiting plate 61 causes the seating position limiting pin 531 to lose its limiting position, and the backrest 51 rotates backward, reclining. At this time, although the drive connector 41 pulls the drive component 43, and the direction of the pulling force of the conversion spring 33 on the ratchet pawl 32 changes, the ratchet pawl 32 and the ratchet tooth 311 are not yet engaged. Continuing to rotate the seating position limiting plate 61, the drive connector 41 drives the drive component 43 to rotate via the drive driven component 42, changing the angle at which the conversion spring 33 pulls the ratchet pawl 32, causing the ratchet pawl 32 to engage with the ratchet tooth 311. In other words, during use, the backrest 51 is adjusted first, and then the ratchet pawl 32 is adjusted.

[0056] The mounting component 52 is provided with an auxiliary limiting pin 521, and the base 2 is provided with an auxiliary limiting groove 22 that cooperates with the auxiliary limiting pin 521. When the backrest 51 rotates relative to the base 2, the backrest 51 stops rotating when the auxiliary limiting pin 521 engages with the auxiliary limiting groove 22.

[0057] In this embodiment, by setting the auxiliary limiting pin 521 to cooperate with the auxiliary limiting groove 22, the mounting part 52 can be positioned in an auxiliary manner. This can share the force on the sitting posture limiting pin 531, reduce the force on the sitting posture limiting pin 531, and improve the service life of the sitting posture limiting pin 531.

[0058] In a further embodiment, such as Figure 11 and Figure 12 As shown, the upper swing plate 12 and the lower swing plate 11 are rotatably connected by a swing shaft 13; Two return springs 16 are abutted between the upper swing plate 12 and the lower swing plate 11, and the two return springs 16 are arranged on both sides of the swing shaft 13.

[0059] Two return springs 16 are supported on both sides of the swing shaft 13, so that when the upper swing plate 12 is not subjected to external force, the forces acting on both sides of the swing shaft 13 by the two return springs 16 are balanced, allowing the upper swing plate 12 and the lower swing plate 11 to remain parallel. Thus, when the ratchet pawl 32 separates from the ratchet tooth 311, the base 2 can automatically return to its initial state under the action of the two return springs 16.

[0060] In addition, forward rocking limit 14 and backward rocking limit 15 are respectively provided at both ends of the lower swing plate 11, so as to limit the rotation angle of the upper swing plate 12, and thus limit the rotation angle of the base 2.

[0061] In another embodiment, such as Figure 1 As shown, this embodiment of the utility model also provides a sofa, including a sofa body, on both sides of which are provided the aforementioned multi-angle gravity control mechanism. The sofa armrests are mounted on the mounting bracket 52, and the sofa back is mounted on the backrest panel 51.

[0062] The drive connectors 41 of the gravity-based multi-angle control mechanisms on both sides of the sofa body are fixedly connected by the same drive rod 7; specifically, the drive connectors 41 of the gravity-based multi-angle control mechanisms on both sides are fixedly connected by the drive rod 7. Therefore, when one drive connector 41 of the gravity-based multi-angle control mechanism is rotated, the drive rod 7 can drive the drive connector 41 of the gravity-based multi-angle control mechanism on the other side to rotate, enabling the gravity-based multi-angle control mechanisms on both sides to achieve synchronized operation.

[0063] In a further embodiment, such as Figure 1 As shown, the drive connector 41 of the gravity multi-angle control mechanism on one side is connected to the control handle 8.

[0064] The control handle 8 is provided so that the drive connector 41 can be easily operated, and the backrest assembly 5 and the angle control assembly 4 can be easily operated.

[0065] The working principle of this utility model is as follows: it is divided into an initial state, a backrest adjustment state, a reclining adjustment state, and a reset state.

[0066] Initial state: such as Figure 2 As shown, the upper swing plate 12 and the lower swing plate 11 are in a parallel state at this time. The latch 611 engages with the sitting posture limiting pin 531, and the sitting posture limiting pin 531 is located at one end of the limiting groove 21 under the action of the latch 611. At this time, the support member 53, the mounting member 52, and the backrest plate 51 cannot move. Figure 3 and Figure 4 As shown, at this time, the conversion spring 33 pulls the ratchet pawl 32, the ratchet pawl 32 separates from the ratchet tooth 311, the ratchet pawl 32 abuts against the lower limit pin 46, and the upper swing plate 12 and the lower swing plate 11 can swing freely.

[0067] Backrest adjustment state: such as Figure 5 As shown, pulling the control handle 8 towards the backrest 51 causes the control handle 8 to simultaneously rotate the seating position limiting plate 61 and the drive connector 41. At this time, the latch 611 separates from the seating position limiting pin 531, and the seating position limiting plate 61 loses its limiting effect on the seating position limiting pin 531. The user's back then acts on the backrest 51, allowing the backrest 51 to rotate backward. During this rotation, the backrest 51 pulls the mounting piece 52, which in turn pulls the support piece 53, causing the support piece 53 to rotate. The seating position limiting pin 531 slides within the limiting groove 21. When the seating position limiting pin 531 slides to the other end of the limiting groove 21, the backrest 51 stops rotating. At this point, the auxiliary limiting pin 521 engages with the auxiliary limiting groove 22.

[0068] like Figure 6 As shown, at this time, the ratchet pawl 32 remains separated from the ratchet tooth 311, while the ratchet pawl 32 still abuts against the lower limit pin 46. It should be noted that during the rearward rotation of the backrest 51, the buffer spring 54 pulls the support member 53. The buffer spring 54 can provide traction to the support member 53, preventing the backrest 51 from reclining too quickly.

[0069] Adjusting your lying position: such as Figure 7 and Figure 8 As shown, continue rotating the control handle 8 towards the backrest panel 51. The control handle 8 drives the drive connector 41 to rotate. The drive connector 41 drives the drive component 43 to rotate via the drive driven component 42. During the rotation of the drive component 43, the adjustment spring 33 pulls the ratchet pawl 32 in the direction of rotation, causing the ratchet pawl 32 to rotate. This causes the ratchet pawl 32 to mesh with the ratchet teeth 311 on the ratchet plate 31 (as shown). Figure 8As shown), at this time, the ratchet pawl 32 abuts against the upper limit pin 45; at this time, the ratchet pawl 32 can only move in one direction along the ratchet teeth 311. Figure 8 and Figure 10 As shown, the user adjusts their center of gravity to shift backward, allowing the base 2 to swing backward in one direction. During this backward swing, the ratchet pawl 32 slides sequentially from bottom to top along several ratchet teeth 311. Once the base 2 has swung to the desired position, the user adjusts their center of gravity again, stopping the base 2 from swinging. The base 2 is then fixed at the current angle.

[0070] Reset State: When it is necessary to reset the angle of the base 2 and the backrest 51, rotate the control handle 8 away from the backrest 51. The control handle 8 simultaneously drives the drive connector 41 and the seating position limiting plate 61 to rotate. The drive connector 41 drives the drive component 43 to rotate through the drive driven component 42, adjusting the angle of the pull ratchet pawl 32 of the conversion spring 33, so that the ratchet pawl 32 separates from the ratchet tooth 311. At this time, under the action of the two reset springs 16, the upper swing plate 12 returns to the parallel posture of the upper swing plate 12 and the lower swing plate 11. At the same time, the latch 611 of the seating position limiting plate 61 pushes the seating position limiting pin 531, so that the seating position limiting pin 531 returns to the initial state, thereby driving the support component 53 to return to the initial state. The support component 53 pulls the mounting component 52, and the mounting component 52 pulls the backrest 51, so that the backrest 51 resets and returns to the original position. Figure 2 , Figure 3 and Figure 4 The initial state is shown.

[0071] Therefore, compared with the prior art, this application has the following advantages.

[0072] 1. Gravity adaptive, effortless operation: Users only need to adjust their own center of gravity to steplessly and smoothly adjust the sofa's reclining position under the action of gravity, without using brute force or complicated operations, and experience natural comfort.

[0073] 2. Multi-angle stepless adjustment: Through the sequential engagement of the ratchet pawl 32 with multiple ratchet teeth 311, the angle of the backrest 51 can be flexibly and stably fixed between multiple positions, which can meet the diverse comfort needs of users.

[0074] 3. Automatic locking and safety protection: After adjustment to any angle, the ratchet pawl 32 automatically locks to prevent accidental rebound and ensure safe use. Simultaneously, the depth design of each ratchet tooth 311 increases switching resistance, preventing accidental triggering due to slight changes in the center of gravity and enhancing stability.

[0075] 4. One-button linkage control: The backrest panel 51 adjustment and base rocking function can be controlled sequentially through a single control handle 8. The operation logic is clear, simple and intuitive.

[0076] 5. Compact structure and ingenious design: The ratchet pawl 32 and the drive component 43 are set coaxially, and the drive connector 41 is coaxially integrated with the sitting posture limiting plate 61, which optimizes the spatial layout and makes the overall mechanism more compact.

[0077] 6. Reliable action sequence: Through clever staggered design, the fixed action sequence of "backrest 51 adjusts first, base 2 swings later" is ensured, avoiding functional interference and making the action process reasonable and reliable.

[0078] 7. Multiple limits and protections: The ratchet pawl 32 is equipped with an upper limit pin 45 and a lower limit pin 46 to prevent it from swinging excessively; the backrest assembly 5 is equipped with a sitting limit pin 531 and a limit groove 21, and an auxiliary limit pin 521 and an auxiliary limit groove 22 to share the force and improve the structural strength and durability; the rocking assembly 1 is equipped with a forward rocking limit 14 and a backward rocking limit 15 to define a safe swing range.

[0079] 8. Automatic reset and buffer: The reset springs 16 located on both sides of the swing axis 13 can automatically restore the sofa to a horizontal position when it is not locked, which is convenient and quick; the buffer springs 54 between the support 53 and the base 2 can effectively slow down the speed of the backrest, improving the gentleness and safety of the movement.

[0080] 9. Good synchronization and high stability: The mechanism is installed on both sides of the sofa and connected by a drive rod 7, which ensures perfect synchronization of the left and right sides, avoids jamming, and improves overall stability and service life.

[0081] 10. High versatility: This mechanism is not only suitable for sofas, but its design principle can also be widely applied to other furniture that needs to achieve gravity self-adaptation and multi-angle adjustment.

[0082] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A gravity-based multi-angle control mechanism, characterized in that, include: A rocking assembly, comprising a lower rocking plate and an upper rocking plate rotatably connected to each other, the upper rocking plate being provided with a base; A multi-angle limiting assembly includes a ratchet plate, a ratchet pawl, and a conversion spring; the ratchet plate is fixedly connected to the lower swing plate, and the ratchet plate is provided with a plurality of ratchet teeth that cooperate with the ratchet pawl; the ratchet pawl is rotatably mounted on the upper swing plate; the conversion spring is used to pull the ratchet pawl, so that the ratchet pawl engages or disengages from the ratchet teeth; An angle control component is provided to control the angle at which the conversion spring pulls the ratchet pawl, causing the conversion spring to engage or disengage the ratchet pawl with the ratchet teeth. When the ratchet pawl disengages from the ratchet teeth, the upper swing plate can rotate freely relative to the lower swing plate. When the ratchet pawl engages with the ratchet teeth, the upper swing plate rotates unidirectionally relative to the lower swing plate, and the ratchet pawl engages with several ratchet teeth in sequence.

2. The self-gravity multi-angle control mechanism according to claim 1, characterized in that, The angle control component includes a drive connector, a drive slave, and a drive component; The drive connector is rotatably mounted on the base; The two ends of the driven driven member are respectively connected to the driven connecting member and the driven member; The driving component is provided with a rotating structure, and the driving component rotates around the rotating structure; one end of the conversion spring is connected to the driving component, and the other end is connected to the ratchet pawl.

3. The self-gravity multi-angle control mechanism according to claim 2, characterized in that, The ratchet pawl is provided with an upper limit pin and a lower limit pin on both sides; the ratchet pawl rotates between the upper limit pin and the lower limit pin.

4. The self-gravity multi-angle control mechanism according to claim 2, characterized in that, The ratchet pawl and the drive member rotate around the same center.

5. The self-gravity multi-angle control mechanism according to claim 2, characterized in that, It also includes a backrest assembly and a backrest control assembly, wherein the backrest assembly includes a backrest panel, a mounting component, and a support component; The backrest is rotatably connected to the base. The support member is rotatably connected to the end of the base away from the backrest. The base is provided with a limit groove, and the support member is provided with a sitting posture limit pin that cooperates with the limit groove. One end of the mounting component is rotatably connected to the end of the support component away from the base, and the other end of the mounting component is rotatably connected to the backrest panel; The backrest control assembly includes a posture limiting plate for pushing the posture limiting pin to slide along the limiting groove.

6. The self-gravity multi-angle control mechanism according to claim 5, characterized in that, A buffer spring connects the support member to the base.

7. The self-gravity multi-angle control mechanism according to claim 5, characterized in that, The sitting posture limiting plate is coaxially arranged with the drive connector.

8. The self-gravity multi-angle control mechanism according to claim 5, characterized in that, The mounting component is provided with an auxiliary limiting pin, and the base is provided with an auxiliary limiting groove that cooperates with the auxiliary limiting pin; When the backrest panel rotates relative to the base, the backrest panel stops rotating when the auxiliary limiting pin engages with the auxiliary limiting groove.

9. The self-gravity multi-angle control mechanism according to any one of claims 1 to 8, characterized in that, The upper swing plate and the lower swing plate are rotatably connected by a swing shaft; Two return springs are abutted between the upper swing plate and the lower swing plate, and the two return springs are arranged on both sides of the swing shaft.

10. A sofa, characterized in that, The sofa body includes a multi-angle gravity control mechanism as described in any one of claims 1 to 9, which is provided on both sides of the sofa body.

11. A sofa, characterized in that, The sofa body includes a multi-angle gravity control mechanism as described in any one of claims 2 to 9 on both sides of the sofa body; the drive connectors of the multi-angle gravity control mechanisms on both sides of the sofa body are fixedly connected by the same drive rod; rotating the drive connector of the multi-angle gravity control mechanism on one side can drive the drive connector of the multi-angle gravity control mechanism on the other side to rotate via the drive rod.

12. The sofa according to claim 11, characterized in that, The drive connector of the gravity multi-angle control mechanism on one side is connected to the control handle.

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