A manual graduated footrest mechanism and sofa

Abstract

This utility model relates to a manually adjustable footrest mechanism and a sofa. The mechanism includes a base, an adjustable control component, a footrest assembly, and a transmission component. The adjustable control component consists of a ratchet pawl, a ratchet plate, a limiting pin, and a conversion spring. The ratchet plate has multiple adjustable slots. By rotating the ratchet plate, the ratchet pawl engages sequentially with each adjustable slot under the limitation of the limiting pin, achieving unidirectional rotation of the ratchet plate. This rotation, via the transmission component, drives the footrest assembly to adjust the extension angle in different positions. The mechanism has multiple positions and a maximum extension state. The ratchet pawl's state transition and overall reset are achieved through a position conversion flange and a reset flange. The footrest assembly is equipped with a footrest retaining spring to stabilize each position.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, and in particular to a manually adjustable leg rest mechanism and a sofa. Background Technology

[0002] Existing adjustable sofas have built-in extension mechanisms, which generally include a footrest mechanism, a seat cushion mechanism, and a backrest mechanism. These three components are connected by a series of mechanical links to adjust the relative positions and angles of the sofa's footrest, seat cushion, and backrest, thereby enabling the switching between sitting, relaxing, and fully reclining positions. Currently, extension mechanisms on the market can generally be divided into two types: electric and manual.

[0003] Currently available manual leg extension devices typically use a cable-spring mechanism to open the footrest. Pulling the cable activates the spring force, which instantly opens the footrest from a seated, vertical position to a horizontal position. This process presents two problems. First, the footrest opens very quickly, which can easily cause discomfort to the user. Second, the footrest can only extend directly from a vertical to a horizontal position, failing to meet the user's need for various leg angle adjustments. Utility Model Content

[0004] This utility model provides a manual split control mechanism for sofa footrests, which aims to solve the problem that existing footrest mechanisms can only be extended directly from a vertical state to a horizontal state, and cannot meet the user's needs for adjusting the leg angle in multiple ways.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In one aspect, this utility model embodiment provides a manually adjustable footrest mechanism, comprising: A base, on which a gear control component, a foot support component, and a transmission component are provided; The transmission assembly is used to transmit the power of the gear control assembly to the footrest assembly. The gearing control component includes a ratchet pawl and a ratchet plate rotatably mounted on the base; the base is provided with a limit pin and a conversion spring, the limit pin is used to limit the rotation angle of the ratchet pawl, and the conversion spring is used to pull the ratchet pawl to keep it in a state of contact or separation from the limit pin; the ratchet plate is provided with a plurality of gearing slots arranged in sequence. When the ratchet plate is rotated, the ratchet pawl remains in contact with the limiting pin. The ratchet plate rotates in one direction, and the ratchet pawl engages with several of the dividing slots in sequence. The transmission component drives the foot rest component to move, thereby realizing the dividing adjustment of the foot rest component.

[0006] In one embodiment, the ratchet plate is provided with a position switching flange, and the ratchet pawl is provided with a reset flange; The ratchet pawl is provided with a first limiting edge; During the sequential engagement of the ratchet pawl with the plurality of the dividing slots, the first limiting edge abuts against the limiting pin. As the ratchet plate continues to rotate, the position switching flange acts on the ratchet pawl, causing the ratchet pawl to separate from the first limiting edge. Afterward, the ratchet plate rotates in the opposite direction to reset, and the position switching flange acts on the reset flange, causing the ratchet pawl to abut against the first limiting edge again.

[0007] In one embodiment, the footrest assembly includes a footrest plate, a first drive rod assembly and a second drive rod assembly connecting the footrest plate and the base; The second drive lever assembly is connected to the gear shifting control assembly via the transmission assembly.

[0008] In one embodiment, the first drive rod assembly includes a first rod and a second rod rotatably connected to each other; the end of the first rod away from the second rod is rotatably connected to the base; and the end of the second rod away from the first rod is rotatably connected to the footrest. The second drive rod assembly includes a third rod and a fourth rod; the end of the third rod away from the fourth rod is rotatably connected to the base, and the end of the fourth rod away from the third rod is rotatably connected to the footrest.

[0009] In one embodiment, the transmission assembly includes a first transmission member and a second transmission member that are rotatably connected to each other; The first transmission component is coaxially connected to the ratchet plate; The end of the second transmission component away from the first transmission component is rotatably connected to the third rod; The connection positions of the second transmission component and the third rod, and the connection positions of the fourth rod and the third rod, are located on both sides of the connection position between the third rod and the base.

[0010] In one embodiment, a leg limiting pin is provided on the fourth rod, and when the footrest assembly is extended to its maximum extent, the leg limiting pin abuts against the first rod.

[0011] In one embodiment, the foot rest assembly further includes a foot rest retaining spring, one end of which is fixedly connected to the base, and the other end of which is fixedly connected to the first drive rod assembly or the second drive rod assembly.

[0012] In one embodiment, the foot-holding spring is fixedly connected to the third rod; When the footrest assembly is in the extended state, the footrest retaining spring is located on one side of the connection position between the third rod and the base, providing tension to keep the footrest assembly in the extended state; When the foot rest assembly is in the retracted state, the foot rest retaining spring is located on the other side of the connection position between the third rod and the base, providing tension to keep the foot rest assembly in the retracted state.

[0013] In one embodiment, the foot rest assembly further includes a foot rest plate, the foot rest plate and the foot rest plate being rotatably connected to both ends of the connecting rod, respectively; An extension rod is provided on the footrest plate, and the end of the extension rod is rotatably connected to the end of the second rod away from the first rod; The connection points between the extension rod and the second rod, and between the first rod and the second rod, are located on either side of the connection point between the second rod and the footrest.

[0014] On the other hand, this utility model embodiment also provides a sofa, including a sofa body, wherein the above-mentioned manual split footrest mechanism is provided on both sides of the sofa body. A drive rod is provided at the bottom of the sofa body. The two ends of the drive rod are fixedly connected to the partition control components of the two sets of manual partition footrest mechanisms. Rotating the ratchet plate of one set of manual partition footrest mechanisms can simultaneously drive the ratchet plate of the other set of manual partition footrest mechanisms to rotate synchronously through the drive rod.

[0015] In one embodiment, the ratchet plate of one set of the manual shifting foot rest mechanisms is fixedly connected to a control handle.

[0016] In one embodiment, the base is integrally formed with the sofa body.

[0017] In a third aspect, this utility model embodiment also provides a sofa, including a sofa body, wherein the above-mentioned manual split footrest mechanism is provided on both sides of the sofa body. The foot plates of the two sets of manual foot rest mechanisms are fixedly connected to the same foot support plate.

[0018] The advantages of this invention compared to existing technologies are as follows: By combining a gear-grading control component, a footrest component, and a transmission component, this invention enables gear-grading adjustment of the footrest component. During the gear-grading adjustment of the footrest component, the ratchet plate rotates, and the gear-grading slots on the ratchet plate sequentially engage with the ratchet pawls. Because the ratchet pawls abut against the limiting pins, when the ratchet plate rotates in the opposite direction, the ratchet pawls are limited by the limiting pins and cannot rotate. This allows the ratchet plate to rotate only in the same direction, and the ratchet pawls can only sequentially engage with several gear-grading slots on the ratchet plate, thus achieving gear-grading adjustment of the footrest component.

[0019] Therefore, this application achieves multi-positional adjustment of the footrest assembly by using a ratchet plate and ratchet pawl, which can meet the user's footrest needs in different sitting postures and provides a clear sense of the different positions. During normal adjustment, the mechanism design ensures that the ratchet plate can only rotate in one direction, effectively preventing accidental retraction of the position due to reverse operation, thus improving the safety and reliability of use.

[0020] 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

[0021] Figure 1 A three-dimensional structural diagram of a manual divider footrest mechanism provided for an embodiment of this utility model; Figure 2 A front view of a manual divider footrest mechanism in its initial state, provided by an embodiment of this utility model; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 A rear view of a manual divider footrest mechanism in its initial state, provided in an embodiment of this utility model; Figure 5 A front view of a manual shifting foot rest mechanism in the first shift position, provided for an embodiment of this utility model; Figure 6 A rear view of a manual shifting foot rest mechanism in the first gear position, provided for an embodiment of this utility model; Figure 7 A front view of a manual shifting foot rest mechanism in the second shift position, provided for an embodiment of this utility model; Figure 8 A rear view of a manual shifting foot rest mechanism in the second position, provided for an embodiment of this utility model; Figure 9 A front view of a manual divider footrest mechanism at its maximum extension, provided in an embodiment of this utility model; Figure 10 A rear view of a manual divider footrest mechanism at its maximum extension, provided in an embodiment of this utility model; Figure 11 A first state diagram of a manual shifting foot rest mechanism in the reset state provided in an embodiment of this utility model; Figure 12A second state diagram of a manual shifting foot rest mechanism in the reset state provided in an embodiment of this utility model; Figure 13 A third state diagram of a manual shifting foot rest mechanism in the reset state provided in an embodiment of this utility model; Figure 14 This is a three-dimensional structural diagram of a sofa provided for an embodiment of the present utility model.

[0022] Figure label: 1. Base; 2. Gear control assembly, 21. Ratchet pawl, 211. First limiting edge, 212. Second limiting edge, 213. Reset flange, 22. Ratchet plate, 221. Gear slot, 222. Position conversion flange, 23. Limit pin, 24. Conversion spring; 3. Footrest assembly; 31. First rod; 32. Second rod; 33. Third rod; 34. Fourth rod; 341. Leg limiting pin; 35. Footrest plate; 36. Footrest retaining spring; 361. First connection point; 362. Second connection point; 363. Third connection point; 37. Connecting rod. 4. Transmission assembly; 41. First transmission component; 42. Second transmission component; 5. Footrest board; 51. Extension rod; 6. Drive lever; 7. Control handle. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Please see Figure 1-4 A manual step rest mechanism, comprising: Base 1, on which a gear control component 2, a foot support component 3 and a transmission component 4 are provided; The transmission component 4 is used to transmit the power of the gear control component 2 to the footrest component 3; The gear-separation control assembly 2 includes a ratchet pawl 21 and a ratchet plate 22 rotatably mounted on the base 1; the base 1 is provided with a limit pin 23 and a conversion spring 24, the limit pin 23 is used to limit the rotation angle of the ratchet pawl 21, and the conversion spring 24 is used to pull the ratchet pawl 21 to keep it in a state of contact or separation with the limit pin 23; the ratchet plate 22 is provided with a plurality of sequentially arranged gear-separation slots 221; When the ratchet plate 22 is rotated, the ratchet pawl 21 and the limiting pin 23 remain in contact. The ratchet plate 22 rotates in one direction, and the ratchet pawl 21 engages with several of the dividing slots 221 in sequence. The transmission component 4 drives the foot rest component 3 to move, thereby realizing the dividing adjustment of the foot rest component 3.

[0028] In this embodiment, by setting up the gear control component 2, the footrest component 3, and the transmission component 4 in cooperation, the gear adjustment of the footrest component 3 can be realized. Specifically, during the gear adjustment of the footrest component 3, the ratchet plate 22 rotates, and the gear grooves 221 on the ratchet plate 22 engage with the ratchet pawls 21 in sequence. Since the ratchet pawls 21 abut against the limiting pins 23, when the ratchet plate 22 rotates in the opposite direction, the ratchet pawls 21 are limited by the limiting pins 23 and cannot rotate. This allows the ratchet plate 22 to rotate only in the same direction, and the ratchet pawls 21 can only engage with a number of gear grooves 221 on the ratchet plate 22 in sequence, thereby realizing the gear adjustment of the footrest component 3.

[0029] In this embodiment, the number of slots 221 is related to the number of positions of the foot support assembly 3. For example, in this embodiment, there are three slots 221. The first one is the initial position, so there are two positions corresponding to the slots 221. In addition to the position of the maximum extension state, the foot support assembly 3 in this embodiment has a total of three states, namely the first state, the second state, and the maximum extension (third state).

[0030] In this embodiment, as Figure 3As shown, a first limiting edge 211 and a second limiting edge 212 are provided on the ratchet pawl 21. The first limiting edge 211 and the second limiting edge 212 form a "V"-shaped opening, allowing the ratchet pawl 21 to rotate within the range of the V-shaped opening. When the ratchet pawl 21 slides in the dividing groove 221, the limiting pin 23 abuts against the first limiting edge 211 under the action of the conversion spring 24. When the foot rest assembly 3 extends to its maximum extent, the limiting pin 23 abuts against the second limiting edge 212.

[0031] In a further embodiment, such as Figure 3 As shown, the ratchet plate 22 is provided with a position conversion flange 222, and the ratchet pawl 21 is provided with a reset flange 213.

[0032] During the sequential engagement of the ratchet pawl 21 with the plurality of the dividing slots 221, the first limiting edge 211 abuts against the limiting pin 23. As the ratchet plate 22 continues to rotate, the position switching flange 222 acts on the ratchet pawl 21, causing the first limiting edge 211 to separate from the limiting pin 23, and the second limiting edge 212 to abut against the ratchet pawl 21. Afterward, the ratchet plate 22 rotates in the opposite direction to reset, and the position switching flange 222 acts on the reset flange 213, causing the first limiting edge 211 of the ratchet pawl 21 to abut against the limiting pin 23 again.

[0033] In this embodiment, the reset flange 213 is located above the ratchet pawl 21, and the overall structure is arc-shaped. The position conversion flange 222 is also located above the ratchet plate 22. When the foot rest assembly 3 is adjusted in stages, the ratchet pawl 21 can sequentially engage with several stage slots 221. After the ratchet pawl 21 engages with the last stage slot 221, the ratchet plate 22 continues to rotate, causing the position conversion flange 222 to act on the ratchet pawl 21. Under the action of the position conversion flange 222, the first limiting edge 211 of the ratchet pawl 21 separates from the limiting pin 23, and the second limiting edge 212 of the ratchet pawl 21 abuts against the limiting pin 23. Figure 9 and Figure 10 As shown, the foot support assembly 3 is extended to its maximum extent at this time. When a reset is required, as... Figure 11 , Figure 12 and Figure 13 As shown, the ratchet plate 22 rotates in the opposite direction. At this time, the ratchet pawl 21 is completely separated from the dividing groove 221, and the ratchet plate 22 can rotate in the opposite direction. When the ratchet plate 22 is about to rotate back to the initial position, the position conversion flange 222 and the reset flange 213 act together to reset the ratchet pawl 21. The first limiting edge 211 of the ratchet pawl 21 abuts against the limiting pin 23 again, realizing the reset of the ratchet pawl 21 and the ratchet plate 22.

[0034] In a further embodiment, such as Figure 6 As shown, the foot support assembly 3 includes a foot support plate 35, a first drive rod group and a second drive rod group connecting the foot support plate 35 and the base 1; The second drive lever assembly is connected to the gear shifting control assembly 2 via the transmission assembly 4.

[0035] In this embodiment, the footrest 35 is rotatably connected to the base 1 via a first drive rod assembly and a second drive rod assembly. The first drive rod assembly and the second drive rod assembly have similar structures.

[0036] Specifically, the first drive rod assembly includes a first rod 31 and a second rod 32 that are rotatably connected to each other; the end of the first rod 31 away from the second rod 32 is rotatably connected to the base 1; the end of the second rod 32 away from the first rod 31 is rotatably connected to the footrest 35. The second drive rod assembly includes a third rod 33 and a fourth rod 34; the end of the third rod 33 away from the fourth rod 34 is rotatably connected to the base 1, and the end of the fourth rod 34 away from the third rod 33 is rotatably connected to the footrest 35.

[0037] The transmission assembly 4 includes a first transmission component 41 and a second transmission component 42 that are rotatably connected to each other. The first transmission component 41 is coaxially connected to the ratchet plate 22; The end of the second transmission member 42 away from the first transmission member 41 is rotatably connected to the third rod 33; The connection positions of the second transmission component 42 and the third rod 33 and the fourth rod 34 and the third rod 33 are respectively located on both sides of the connection position between the third rod 33 and the base 1.

[0038] In this embodiment, both the fourth rod 34 and the second rod 32 are rotatably connected to the footrest 35, so that the first rod 31, the second rod 32, the third rod 33, and the fourth rod 34 form an integral linkage drive mechanism. Thus, when the ratchet plate 22 rotates, it drives the first transmission member 41 to rotate, which in turn drives the second transmission member 42 to move. The second transmission member 42 then drives the third rod 33 to rotate, and the third rod 33 rotates around its rotatably connected position to the base 1. This causes the fourth rod 34, the third rod 33, and the second rod 32 to rotate synchronously, achieving the extension and retraction of the footrest 35.

[0039] In this embodiment, a leg limiting pin 341 is provided on the fourth rod 34. When the foot rest assembly 3 is extended to its maximum extent, the leg limiting pin 341 abuts against the first rod 31.

[0040] In this embodiment, a leg limiting pin 341 is provided so that when the footrest assembly 3 is extended to its maximum extent, the leg limiting pin 341 can abut against the side wall of the first rod 31, thereby allowing the footrest plate 35 to be restricted to a suitable position and preventing the first drive rod group and the second drive rod group from being over-deformed.

[0041] In a further embodiment, the foot rest assembly 3 further includes a foot rest retaining spring 36, one end of which is fixedly connected to the base 1, and the other end of which is fixedly connected to the first drive rod assembly or the second drive rod assembly.

[0042] The footrest retaining spring 36 helps keep the footrest assembly 3 in either extended or retracted state. When the footrest assembly 3 is in the retracted state, the footrest retaining spring 36 provides tension, allowing the footrest assembly 3 to retract more stably and occupy less space. When the footrest assembly 3 is in the extended state, the footrest retaining spring 36 provides tension, allowing the footrest assembly 3 to better maintain the extended state. When the user's foot rests on the footrest plate 35, it provides support to the footrest plate 35, reduces the force between the ratchet plate 22 and the ratchet pawl 21, reduces the force on the footrest assembly 3, the transmission assembly 4, and the gear shifting control assembly 2, and improves the service life of the entire mechanism.

[0043] In a further embodiment, the foot-holding spring 36 is fixedly connected to the third rod 33; When the footrest assembly 3 is in the extended state, the footrest retaining spring 36 is located on one side of the connection position between the third rod 33 and the base 1, providing tension to keep the footrest assembly 3 in the extended state; When the foot rest assembly 3 is in the retracted state, the foot rest retaining spring 36 is located on the other side of the connection position between the third rod 33 and the base 1, providing tension to keep the foot rest assembly 3 in the retracted state.

[0044] like Figure 2 As shown, the foot-holding spring 36 is connected to the base 1 at the first connection point 361, the foot-holding spring 36 is connected to the third rod 33 at the second connection point 362, and the third rod 33 is connected to the base 1 at the third connection point 363. This makes the first connection point 361, the second connection point 362, and the third connection point 363 form a triangle.

[0045] like Figure 9 and Figure 10 As shown, when the footrest assembly 3 is in its maximum extended state, the footrest retaining spring 36 is located on one side of the third connection point 363, providing tension to keep the footrest assembly 3 in its extended state.

[0046] like Figure 2As shown, when the foot rest assembly 3 is in the retracted state, the foot rest retaining spring 36 is located on the other side of the third connection point 363, providing tension to keep the foot rest assembly 3 in the retracted state.

[0047] In a further embodiment, in order to improve the user experience, the footrest assembly 3 in this embodiment also includes a footrest plate 5, and the footrest plate 5 and the footrest plate 35 are respectively rotatably connected to both ends of the connecting rod 37. An extension rod 51 is provided on the footrest plate 5, and the end of the extension rod 51 is rotatably connected to the end of the second rod 32 away from the first rod 31. The connection positions of the extension rod 51 and the second rod 32 and the connection positions of the first rod 31 and the second rod 32 are respectively located on both sides of the connection position of the second rod 32 and the footrest 35.

[0048] With the above structure, when the footrest assembly 3 extends, the second rod 32 and the footrest plate 35 rotate, causing the second rod 32 to drive the extension rod 51 to rotate, thereby causing the footrest plate 5 to gradually extend as well. Similarly, when the footrest assembly 3 retracts, the footrest plate 5 can retract under the action of the second rod 32.

[0049] In another embodiment, such as Figure 14 As shown, this embodiment also provides a sofa, including a sofa body, and the above-mentioned manual split-leg rest mechanism is provided on both sides of the sofa body. A drive rod 6 is provided at the bottom of the sofa body. The two ends of the drive rod 6 are fixedly connected to the partition control components 2 of the two sets of manual partition footrest mechanisms. Rotating the ratchet plate 22 of one set of manual partition footrest mechanisms can simultaneously drive the ratchet plate 22 of the other set of manual partition footrest mechanisms to rotate synchronously through the drive rod 6.

[0050] Specifically, in this embodiment, the drive rod 6 is fixedly connected to the first transmission member 41, and the first transmission member 41 and the ratchet plate 22 are fixedly connected to the same rotating shaft. The rotating shaft passes through the base 1, and the first transmission member 41 and the ratchet plate 22 are respectively fixed at both ends of the rotating shaft. Thus, when the ratchet plate 22 rotates, it can drive the first transmission member 41 to rotate through the rotating shaft. The first transmission member 41 drives the drive rod 6 to rotate synchronously, so that the drive rod 6 can synchronously drive the other set of manual shifting foot rest mechanisms to move, thereby enabling the two sets of manual shifting foot rest mechanisms to achieve synchronous extension and retraction.

[0051] Therefore, to facilitate the rotation of the ratchet plate 22, a control handle 7 is fixedly connected to the ratchet plate 22 of one of the manual shifting foot rest mechanisms. Thus, by manipulating the control handle 7, the two sets of manual shifting foot rest mechanisms can be operated synchronously.

[0052] In a further embodiment, the base 1 is integrally formed with the sofa body. That is, the base 1 can be set separately, or the partition control component 2, the footrest component 3, and the transmission component 4 can be directly fixed to the sofa body.

[0053] In a further embodiment, the foot rests 35 of the two sets of manual foot rest mechanisms are fixedly connected to the same foot support plate.

[0054] In this embodiment, the footrest 35 is fixedly connected to the same footrest support plate, so that the footrests 35 of the two sets of manual footrest mechanisms can be connected together, making the overall structure more robust. At the same time, the footrest support plate can increase the area for users to rest their feet, improving user comfort.

[0055] The working principle of this embodiment is as follows, mainly including the initial state, the first gear state, the second gear state, the maximum extension (third gear) state, and the reset state.

[0056] (1) Initial state: such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, at this time, the ratchet pawl 21 abuts against the bottommost gear slot 221, and the transmission assembly 4, the foot rest assembly 3, and the gear control assembly 2 are all in their initial state; as Figure 3 As shown, at this time, the limiting pin 23 abuts against the first limiting edge 211 of the ratchet pawl 21, and the ratchet plate 22 can only rotate counterclockwise in one direction; as Figure 2 As shown, the foot rest retaining spring 36 is located on one side of the third connection point 363, providing tension to keep the foot rest assembly 3 in the retracted state.

[0057] (2) First gear status: such as Figure 5 and Figure 6 As shown, at this time, the ratchet pawl 21 abuts against the second stop slot 221, and the transmission component 4 drives the foot rest component 3 to extend to a certain extent; as Figure 5 As shown, at this time, the limiting pin 23 abuts against the first limiting edge 211 of the ratchet pawl 21, and the ratchet plate 22 can only rotate counterclockwise in one direction; at this time, the foot rest retaining spring 36 is still located on one side of the third connection point 363, providing tension for the foot rest assembly 3 to remain in the retracted state.

[0058] (3) Second gear: such as Figure 7 and Figure 8 As shown, at this time, the ratchet pawl 21 abuts against the third stop slot 221, and the transmission assembly 4 drives the foot rest assembly 3 to extend to a greater extent; as Figure 7As shown, at this time, the limiting pin 23 abuts against the first limiting edge 211 of the ratchet pawl 21, and the ratchet plate 22 can only rotate counterclockwise in one direction; at this time, the position of the foot holding spring 36 coincides with the position of the third connection point 363.

[0059] (4) Maximum extension (third position) state: such as Figure 9 and Figure 10 As shown, the ratchet plate 22 rotates further at this time, and the position switching flange 222 acts on the ratchet pawl 21, as... Figure 9 As shown, the limiting pin 23 abuts against the second limiting edge 212 of the ratchet pawl 21; at this time, the transmission component 4 drives the foot rest component 3 to extend to the maximum extent; at this time, the foot rest retaining spring 36 is located on the other side of the third connection point 363, providing tension to keep the foot rest component 3 in the maximum extended state.

[0060] (5) Reset state: such as Figure 11 , Figure 12 and Figure 13 As shown, under the tension of the conversion spring 24, the second limiting edge 212 of the ratchet pawl 21 abuts against the limiting pin 23, at which time the ratchet plate 22 can be rotated clockwise. During the reverse rotation of the ratchet plate 22, the position conversion flange 222 acts on the reset flange 213, so that the first limiting edge 211 of the ratchet pawl 21 abuts against the limiting pin 23 again, so that the entire structure returns to the initial state.

[0061] In summary, this application has the following advantages compared with the prior art: (1) Gradual adjustment and precise positioning: Through the cooperation of ratchet plate 22 and ratchet pawl 21, the footrest assembly 3 can be adjusted in multiple fixed angles, which can meet the footrest needs of users in different sitting postures and the operation has a clear sense of gear.

[0062] (2) Unidirectional rotation, preventing misoperation: During normal adjustment, the mechanism design ensures that the ratchet plate 22 can only rotate in one direction, effectively preventing the gear from falling back due to reverse operation, and improving the safety and reliability of use.

[0063] (3) One-click reset, easy operation: Through the unique design of “position conversion flange 222” and “reset flange 213”, a fast and smooth reset from the maximum extension state to the initial state is achieved, and the user does not need complicated operation.

[0064] (4) Double-sided synchronous linkage: In sofa applications, the manual split footrest mechanism on both sides can be controlled synchronously by a single drive rod 6, ensuring the synchronicity and stability of the foot support, and only one control handle 7 is needed, making operation very convenient.

[0065] (5) Add footrest 5 to improve comfort: The design of footrest 5 further extends and optimizes the foot support point, and can move in conjunction with footrest 35 to better fit the leg curve and improve the comfort of use.

[0066] (6) Stable mechanism and good load-bearing capacity: The multi-link (first drive rod group, second drive rod group) transmission structure is adopted, and the structure is stable. In the maximum extension state, a leg limit pin 341 is provided to prevent the foot rest assembly from over-extension, ensuring the structural strength and stability of the mechanism under load.

[0067] (7) Efficient and reliable force transmission: The transmission component 4 efficiently converts the rotational motion of the gear control component 2 into the extension / contraction motion of the foot support component 3. The mechanical principle is simple and the power transmission is reliable.

[0068] (8) Self-locking and state holding: Utilizing the self-locking characteristics of the ratchet mechanism, combined with the assistance of the foot holding spring 36, the mechanism can be stably held in any position (including the retracted and extended states) without the need for continuous external force.

[0069] (9) Overload protection and long service life: When the foot rest spring 36 is in the extended state, it can provide support force, share the pressure of the user's weight on the core control components (ratchet plate 22, ratchet pawl 21), reduce wear, and improve the service life of the entire mechanism.

[0070] 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 manually operated, spaced-out foot rest mechanism, characterized in that, include: A base, on which a gear control component, a foot support component, and a transmission component are provided; The transmission assembly is used to transmit the power of the gear control assembly to the footrest assembly. The gearing control component includes a ratchet pawl and a ratchet plate rotatably mounted on the base; the base is provided with a limit pin and a conversion spring, the limit pin is used to limit the rotation angle of the ratchet pawl, and the conversion spring is used to pull the ratchet pawl to keep it in a state of contact or separation from the limit pin; the ratchet plate is provided with a plurality of gearing slots arranged in sequence. When the ratchet plate is rotated, the ratchet pawl remains in contact with the limiting pin. The ratchet plate rotates in one direction, and the ratchet pawl engages with several of the dividing slots in sequence. The transmission component drives the foot rest component to move, thereby realizing the dividing adjustment of the foot rest component.

2. The manual shifting foot rest mechanism according to claim 1, characterized in that, The ratchet plate is provided with a position conversion flange, and the ratchet pawl is provided with a reset flange; The ratchet pawl is provided with a first limiting edge; During the sequential engagement of the ratchet pawl with the plurality of the dividing slots, the first limiting edge abuts against the limiting pin. As the ratchet plate continues to rotate, the position switching flange acts on the ratchet pawl, causing the ratchet pawl to separate from the first limiting edge. Afterward, the ratchet plate rotates in the opposite direction to reset, and the position switching flange acts on the reset flange, causing the ratchet pawl to abut against the first limiting edge again.

3. The manual shifting foot rest mechanism according to claim 1 or 2, characterized in that, The footrest assembly includes a footrest plate, a first drive rod assembly and a second drive rod assembly connecting the footrest plate and the base; The second drive lever assembly is connected to the gear shifting control assembly via the transmission assembly.

4. The manual shifting foot rest mechanism according to claim 3, characterized in that, The first drive rod assembly includes a first rod and a second rod that are rotatably connected to each other; the end of the first rod away from the second rod is rotatably connected to the base; the end of the second rod away from the first rod is rotatably connected to the footrest. The second drive rod assembly includes a third rod and a fourth rod; the end of the third rod away from the fourth rod is rotatably connected to the base, and the end of the fourth rod away from the third rod is rotatably connected to the footrest.

5. The manual shifting foot rest mechanism according to claim 4, characterized in that, The transmission assembly includes a first transmission component and a second transmission component that are rotatably connected to each other. The first transmission component is coaxially connected to the ratchet plate; The end of the second transmission component away from the first transmission component is rotatably connected to the third rod; The connection positions of the second transmission component and the third rod, and the connection positions of the fourth rod and the third rod, are located on both sides of the connection position between the third rod and the base.

6. The manual shifting foot rest mechanism according to claim 4, characterized in that, The fourth rod is provided with a leg limiting pin. When the footrest assembly is extended to its maximum extent, the leg limiting pin abuts against the first rod.

7. The manual shifting foot rest mechanism according to claim 4, characterized in that, The footrest assembly also includes a footrest retaining spring, one end of which is fixedly connected to the base, and the other end of which is fixedly connected to the first drive rod assembly or the second drive rod assembly.

8. The manual shifting foot rest mechanism according to claim 7, characterized in that, The foot rest retaining spring is fixedly connected to the third rod; When the footrest assembly is in the extended state, the footrest retaining spring is located on one side of the connection position between the third rod and the base, providing tension to keep the footrest assembly in the extended state; When the foot rest assembly is in the retracted state, the foot rest retaining spring is located on the other side of the connection position between the third rod and the base, providing tension to keep the foot rest assembly in the retracted state.

9. The manual shifting foot rest mechanism according to claim 4, characterized in that, The foot rest assembly also includes a foot rest plate, which and the foot rest plate are respectively rotatably connected to both ends of the connecting rod; An extension rod is provided on the footrest plate, and the end of the extension rod is rotatably connected to the end of the second rod away from the first rod; The connection points between the extension rod and the second rod, and between the first rod and the second rod, are located on either side of the connection point between the second rod and the footrest.

10. A sofa, characterized in that, Includes a sofa body, and both sides of the sofa body are provided with a manual split footrest mechanism as described in any one of claims 1 to 9; A drive rod is provided at the bottom of the sofa body. The two ends of the drive rod are fixedly connected to the partition control components of the two sets of manual partition footrest mechanisms. Rotating the ratchet plate of one set of manual partition footrest mechanisms can simultaneously drive the ratchet plate of the other set of manual partition footrest mechanisms to rotate synchronously through the drive rod.

11. The sofa according to claim 10, characterized in that, One set of the manual shifting foot rest mechanisms has a ratchet plate fixedly connected to a control handle.

12. The sofa according to claim 10, characterized in that, The base is integrally formed with the sofa body.

13. A sofa, characterized in that, Includes a sofa body, and both sides of the sofa body are provided with a manual split-leg footrest mechanism as described in claim 4; The foot plates of the two sets of manual foot rest mechanisms are fixedly connected to the same foot support plate.

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