Seat frame with split footrest and multifunctional seat

Abstract

This application discloses a seat frame with split footrests and a multi-functional seat. The seat frame has an unfolded state and a folded state and includes: a seating frame with a front side and a rear side, the seating frame having a receiving space; a first footrest assembly including a first pedal and a first folding mechanism, the first folding mechanism being a multi-link mechanism with at least two links respectively hinged to the first pedal, the two links being a front link and a rear link; and a second footrest assembly including a second pedal and a second folding mechanism. The rear link acts as a linkage with the second folding mechanism. In the unfolded state, the first folding mechanism and the second folding mechanism extend forward accordingly; in the folded state, the second pedal is located within the receiving space, and the first pedal is located in front of the second pedal. This application optimizes the structure and linkage relationship, achieving both a spacious and comfortable seating experience and an aesthetically pleasing and compact spatial layout.

Description

Technical Field

[0001] This application relates to the field of furniture, and in particular to a chair frame with a separate footrest and a multifunctional chair. Background Technology

[0002] The multi-functional chair offers three usage positions: sitting, relaxing, and reclining. These positions allow users to sit down, raise their legs to relax, and lie down to rest, respectively. The chair provides the seat surface through its seat frame. When a user intends to recline, extending the footrest relative to the seat frame allows them to switch from a sitting to a relaxing position; further, reclining the backrest relative to the seat frame allows them to switch from a relaxing to a reclining position. After resting, the chair first returns to a relaxed position by retracting the backrest, and then retracts the footrest to return to a sitting position, allowing the user to get up and leave the chair.

[0003] To ensure ample leg support and extension for users in relaxed and reclining positions, some existing multi-functional chairs incorporate multiple footrest components, each including a footrest pedal to increase the support area. However, with the increasing number of footrest components, the interrelationship between the footrest components and the seating frame becomes more complex. Balancing a spacious and comfortable seating experience when the chair frame is unfolded with an aesthetically pleasing and compact layout when folded has become a pressing issue. Utility Model Content

[0004] To address the aforementioned technical problems, this application discloses a seat frame with separate footrests, the seat frame having an unfolded state and a folded state and including:

[0005] A seating frame has opposing front and rear sides, and a receiving space is provided within the seating frame;

[0006] The first footrest assembly includes a first pedal and a first folding mechanism connecting the first pedal and the seating frame. The first folding mechanism is a multi-link mechanism. The first folding structure has at least two rods that are respectively hinged to the first pedal. The two rods are divided into a front rod and a opposite rear rod according to their hinge positions with the first pedal.

[0007] The second footrest assembly includes a second pedal and a second folding mechanism connecting the second pedal and the first footrest assembly;

[0008] The rear rod serves as a linkage rod connected to the second folding mechanism to link the various folding mechanisms. In the unfolded state, the first folding mechanism extends forward from the seating frame, and the second folding mechanism follows the first folding mechanism and extends forward from the first pedal. In the folded state, the second pedal is located within the receiving space, and the first pedal is located in front of the second pedal.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] In one embodiment, the first folding mechanism is a multi-link mechanism with at least two links respectively hinged to the first pedal. The two links are divided into a front link and a rear link according to their hinge position with the first pedal. The rear link serves as a linkage link and is connected to the second folding mechanism to link the various folding mechanisms.

[0011] In one embodiment, the seating frame includes:

[0012] Base;

[0013] A hip assembly is mounted on the base, and the receiving space is located below the hip assembly;

[0014] A drive assembly, mounted on the base, drives the first folding structure to move, causing the seat frame to switch between the unfolded state and the folded state.

[0015] In one embodiment, the driving component includes:

[0016] The drive track extends along the front-to-back direction of the seating frame;

[0017] The drive block slides in a controlled manner on the drive track;

[0018] The drive link is hinged at both ends to the drive block and the first folding mechanism, respectively.

[0019] In one embodiment, the second folding mechanism includes a first link, a second link, and a third link, wherein:

[0020] The first link is hinged to the second pedal and the third link;

[0021] The second link is hinged to the first pedal and the second pedal;

[0022] The third link is hinged to the second link and the first folding mechanism;

[0023] The second folding mechanism is linked to the first folding mechanism and controls the movement of the second pedal relative to the first pedal.

[0024] In one embodiment, the second link is connected to the second pedal via hinge point A, to the first pedal via hinge point G, and to the third link via hinge point C; the first link is connected to the second pedal via hinge point B and to the third link via hinge point D.

[0025] Along the extension direction of the second link, hinge point A and hinge point C are located on both sides of hinge point G.

[0026] In one embodiment, the second link is connected to the first pedal via hinge point G and to the third link via hinge point C;

[0027] In the unfolded state, the hinge point C is located behind the hinge point G.

[0028] In one embodiment, one end of the linkage is connected to the first pedal via hinge point E, and the other end of the linkage is connected to an adjacent member in the multi-link mechanism via hinge point K.

[0029] The linkage rod is also connected to the third linkage rod via hinge point F to link the various folding mechanisms, wherein hinge point E and hinge point K are located on both sides of hinge point F along the extension direction of the linkage rod.

[0030] In one embodiment, the first folding mechanism includes a fourth link, a fifth link, a sixth link, and a seventh link, wherein:

[0031] The fourth link and the sixth link are sequentially hinged between the first pedal and the seating frame, and the fourth link is connected to the first pedal through hinge point H;

[0032] The fifth link and the seventh link are sequentially hinged between the first pedal and the seating frame. The fifth link is connected to the first pedal through hinge point E. In the unfolded state, hinge point E is located behind hinge point H.

[0033] The fifth link is hinged to the sixth link as a connecting link.

[0034] In one embodiment, the linkage rod is connected to the second folding mechanism via hinge point F to link the folding mechanisms.

[0035] In the unfolded state, the hinge point F is closer to the rear side of the first pedal than to the front and rear sides of the first pedal.

[0036] This application also discloses a multifunctional seat, including the seat frame with separate footrests as described in the above technical solution of this application.

[0037] The technical solution disclosed in this application optimizes the structure and linkage of the footrest component and the seat frame, enabling the seat frame to provide a spacious and comfortable riding experience when unfolded, and to achieve a beautiful and compact spatial layout when folded.

[0038] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with specific structures or steps. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the unfolded state of a seat frame with separate feet in one embodiment of this application;

[0040] Figure 2 for Figure 1 A side view of the seat frame with separate footrests;

[0041] Figure 3 This is a partially enlarged schematic diagram of the first and second foot supports.

[0042] Figure 4 This is a schematic diagram of the structure of the first deformation pair;

[0043] Figure 5 This is a schematic diagram of the structure of the second deformation pair;

[0044] Figure 6 This is a schematic diagram of the structure of the third deformation pair;

[0045] Figure 7 This is a schematic diagram of the structure of the fourth deformation pair;

[0046] Figure 8 This is a schematic diagram of the seat frame with separate legs in its folded state.

[0047] Figure 9 for Figure 8 A side view of the seat frame with separate footrests;

[0048] Figure 10 A schematic diagram of the drive assembly for a seat frame with separate footrests.

[0049] The annotations in the figure are explained as follows:

[0050] 100. Seating frame; 101. Front side; 102. Rear side; 103. Reception space; 110. Base; 120. Hip assembly; 130. Drive assembly; 131. Drive rail; 132. Drive block; 133. Drive linkage; 134. Drive motor; 135. Synchronizing rod; 136. Transmission linkage;

[0051] 200. First footrest assembly; 210. First pedal; 220. First folding mechanism; 221. Fourth link; 222. Fifth link; 223. Sixth link; 224. Seventh link; 225. Second limiting pin;

[0052] 300. Second footrest assembly; 310. Second pedal; 311. Clearance groove; 320. Second folding mechanism; 321. First link; 322. Second link; 323. Third link; 324. First limit pin;

[0053] 400. Backrest assembly;

[0054] 901, First deformation pair; 902, Second deformation pair; 903, Third deformation pair; 904, Fourth deformation pair. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] The seat frame establishes a spatial support structure to achieve the function of a multi-functional seat. The seating frame 100 of the seat frame provides a seat surface, and the movement of the footrest assembly relative to the seating frame 100 can provide different sitting postures. For example, see attached... Figure 1 and attached Figure 2 The relaxed postures shown, as well as further reclining postures, and for example, the attached... Figure 8 To be continued Figure 9 The sitting posture shown.

[0059] To balance the spacious and comfortable seating experience when the seat frame is unfolded with the aesthetically pleasing and compact layout when folded, this application discloses a seat frame with separate footrests, including a seating frame 100, a first footrest assembly 200, and a second footrest assembly 300. In this embodiment, the seating frame 100 has opposing front sides 101 and rear sides 102, and a receiving space 103 is provided within the seating frame 100. In the description of other components or positional relationships, reference can also be made to the directions pointed to by the front sides 101 and rear sides 102.

[0060] The first footrest assembly 200 includes a first pedal 210 and a first folding mechanism 220 connecting the first pedal 210 and the seating frame 100. The first pedal 210 can be divided into a first surface for stepping on and a first step for connecting the first folding mechanism 220. During seat frame state switching, the first surface and the first step move synchronously and can therefore be understood as an integral structure. Unless otherwise specified, the cooperation relationships mentioned below with the first pedal can be applied to the first surface and / or the first step. The movement of the first pedal 210 relative to the seating frame 100 is achieved by the deformation of the first folding mechanism 220.

[0061] The second footrest assembly 300 includes a second pedal 310 and a second folding mechanism 320 connecting the second pedal 310 and the first footrest assembly 200. Similar to the first pedal 210, the second pedal 310 can be divided into a second surface for stepping on and a second step for connecting the second folding mechanism 320. During seat frame state switching, the second surface and the second step move synchronously and can therefore be understood as an integral structure. Unless otherwise specified, the cooperation relationship with the second pedal mentioned below can be applied to the second surface and / or the second step. Through the linkage between the second folding mechanism 320 and the first footrest assembly 200, the spatial position of the second pedal 310 relative to the first pedal 210 can be adjusted accordingly during the movement of the first footrest assembly 200.

[0062] When the seat frame is in the unfolded state, the first folding mechanism 220 extends forward from the seating frame 100, and the second folding mechanism 320 follows the first folding mechanism 220 and extends further forward from the first pedal 210. The second pedal 310 and the first pedal 210 form a footrest structure for resting the feet. Compared with the prior art, the footrest structure composed of the two pedals can provide a more comfortable sitting and lying experience.

[0063] When the seat frame is folded down, the second pedal 310 is located within the receiving space 103, and the first surface of the first pedal 210 is located in front of the second pedal 310. Furthermore, the first surface of the first pedal 210 covers the second pedal 310. When discussing the covering relationship between the first pedal 210 and the second pedal 310, the surface of the first pedal 210 and the pedal frame are functionally different and are no longer considered as a single structure. The first surface of the first pedal 210 may only cover the second surface of the second pedal 310, or it may cover the receiving space 103 from the front to cover both the second surface of the second pedal 310 and the second pedal frame. Furthermore, the pedal surface of the first pedal 210 may also cover the first folding mechanism 220 and the second folding mechanism 320 housed within the receiving space 103. The overall first pedal 210 provides a more regular appearance, improves the seat's texture, and achieves a beautiful and compact spatial layout.

[0064] Regarding the linkage between the first folding structure and the second folding structure, one embodiment can be referenced. The first folding mechanism 220 is a multi-link mechanism with at least two links respectively hinged to the first pedal 210. The two links are divided into a front link and a corresponding rear link according to their hinge positions with the first pedal 210. The rear link serves as a linkage rod connected to the second folding mechanism 320 to link the various folding mechanisms. (See attached diagram.) Figure 3 and attached Figure 4 As shown, the links that are hinged to the first pedal 210 in the first folding mechanism 220 are the fourth link 221 and the fifth link 222, respectively. The hinge point H between the fourth link 221 and the first pedal 210 is located in front of the hinge point E between the fifth link 222 and the first pedal 210. Therefore, in this embodiment, the front link is the fourth link 221 and the rear link is the fifth link 222. The fifth link 222 is connected to the second folding mechanism 320 as a linkage rod to link the various folding mechanisms.

[0065] The terms "hinge point A" and "hinge point B" (specifically including hinge points A to N) used in this application are for ease of description, i.e., the names contain letters to distinguish them from each other, and each letter also corresponds to the reference numerals in the attached drawings.

[0066] Furthermore, the linkage (e.g., the fifth linkage 222 in the above embodiment) enables the linkage between the first folding mechanism 220 and the second folding mechanism 320 through its hinge point F with the third linkage 323 in the second folding mechanism 320. When the seat frame is in the unfolded state, the hinge point F is closer to the rear side of the first pedal 210 relative to the front and rear sides of the first pedal 210. Preferably, the hinge point F is located behind the hinge point E and / or the hinge point H.

[0067] Based on the above concept, the embodiments in this application also provide a preferred arrangement of the second folding mechanism 320, see attached figure. Figure 3 and attached Figure 4 As shown, the second folding mechanism 320 includes a first link 321, a second link 322, and a third link 323, wherein:

[0068] The first link 321 is hinged to the second pedal 310 and the third link 323;

[0069] The second link 322 is hinged to the first pedal 210 and the second pedal 310;

[0070] The third link 323 is hinged to the second link 322 and the first folding mechanism 220;

[0071] The second folding mechanism 320 is linked with the first folding mechanism 220 and controls the movement of the second pedal 310 relative to the first pedal 210.

[0072] Furthermore, the aforementioned links can also be configured as follows:

[0073] The second link 322 is connected to the second pedal 310 via hinge point A, to the first pedal 210 via hinge point G, and to the third link 323 via hinge point C.

[0074] The first link 321 is connected to the second pedal 310 via hinge point B, and to the third link 323 via hinge point D.

[0075] The aforementioned hinge relationship, combined with the first pedal 210 and the linkage rod, realizes two interconnected deformation mechanisms. See the appendix for details. Figure 4 The first deformation pair 901 shown and the attached Figure 5 The second deformation pair 902 shown, the first deformation pair 901 and the second deformation pair 902 achieve linkage between the first folding mechanism 220 and the second folding mechanism 320 through the shared use of the third link 323. In terms of hinge relationship, hinge points A and C are located on opposite sides of hinge point G along the extension direction of the second link 322. In terms of engagement configuration, when the seat frame is in the unfolded state, hinge point C is located behind hinge point G.

[0076] The embodiments in this application also provide a preferred configuration of the first folding mechanism 220, see attached figure. Figure 3 and appendix Figure 5 To be continued Figure 7 As shown, the first folding mechanism 220 includes a fourth link 221, a fifth link 222, a sixth link 223, and a seventh link 224, wherein:

[0077] The fourth link 221 and the sixth link 223 are hinged between the first pedal 210 and the seat frame 100 in sequence. The fourth link 221 is connected to the first pedal 210 through hinge point H and to the sixth link 223 through hinge point J.

[0078] The fifth link 222 and the seventh link 224 are hinged sequentially between the first pedal 210 and the seat frame 100. The fifth link 222 is connected to the first pedal 210 through hinge point E and to the sixth link 223 through hinge point K. The fifth link 222 is also connected to the seventh link 224 through hinge point L.

[0079] As can be seen from the above, in the unfolded state, hinge point E is located behind hinge point H, that is, the fifth link 222 acts as a linkage, one end of the linkage is connected to the first pedal 210 through hinge point E, and the other end of the linkage is connected to the adjacent link in the multi-link mechanism (i.e., the sixth link 223) through hinge point K.

[0080] The linkage rod is also connected to the third link 323 via hinge point F to link the various folding mechanisms. Hinge points E and K are located on either side of hinge point F along the extension direction of the linkage rod. One end of the first folding mechanism 220 is connected to the first pedal 210, and the other end is connected to the seating frame 100. The sixth link 223 is connected to the seating frame 100 via hinge point M, and hinge point K is located between hinge points J and M. The seventh link 224 is connected to the seating frame 100 via hinge point N. In this embodiment, hinge points M and N are located on the hip assembly 120.

[0081] The aforementioned hinge relationship creates an interconnected deformation mechanism within the first folding mechanism 220, as detailed in the appendix. Figure 6 The third deformation pair 903 and the attached Figure 7 The fourth deformation pair 904 is shown. The first folding mechanism 220 described above can move away from each other around the hinge point K to achieve the seat frame entering the unfolded state, or move closer together to achieve the seat frame entering the folded state.

[0082] To limit the travel of the first folding mechanism 220 and the second folding mechanism 320, a limiting member can be provided. The limiting member can be located at the hinge point to optimize the layout. See also the attached diagram. Figure 3 and attached Figure 6As shown, the limiting components include a first limiting pin 324 and a second limiting pin 225. The first limiting pin 324 is disposed on the second folding mechanism 320. Specifically, the first limiting pin 324 is fixed to the second connecting rod 322 and is used to cooperate with the second pedal 310 to limit the movement limit position of the second folding mechanism 320. The second limiting pin 225 is disposed on the first folding mechanism 220. Specifically, the second limiting pin 225 is fixed to the sixth connecting rod 223 and is used to cooperate with the fifth connecting rod 222 to limit the movement limit position of the first folding mechanism 220.

[0083] To achieve a compact layout, the chair frame's members are positioned close together. To facilitate the placement of hinge points, clearance structures can be incorporated into the corresponding members. For example, see attached... Figure 3 and attached Figure 5 As shown, the first pedal 210 is provided with a clearance groove 311 or clearance step that is arranged in an arc relative to the hinge point G. The hinge shaft of the hinge point C is movably fitted within the clearance groove 311. The extension length of the clearance groove 311 can be matched with the range of motion of the hinge shaft to realize the limiting function mentioned above; the extension length of the clearance groove 311 can also be greater than the range of motion of the hinge shaft to avoid repeated limiting.

[0084] The seating frame 100 provides the structural basis for the operation of the first footrest assembly 200 and the second footrest assembly 300. The seating frame 100 may consist only of the hip assembly 120 for providing the seat surface, or refer to the appendix... Figure 1 and appendix Figure 8 To be continued Figure 10 As shown, the seating frame 100 includes a base 110 and a hip assembly 120, with the hip assembly 120 mounted on the base 110. A receiving space 103 is located below the hip assembly 120. When the seat frame is covered with seat components such as a seat board and flexible parts, the receiving space 103 is enclosed below the hip assembly 120 to conceal the second pedal 310, the first folding mechanism 220, and the second folding structure.

[0085] This application also provides preferred methods for setting the drive source of each folding mechanism, see appendix. Figure 8 To be continued Figure 10 As shown, the seating frame 100 also includes a drive assembly 130, which is mounted on the base 110 and drives the first folding structure to switch the seat frame between an unfolded state and a folded state. Further, the drive assembly 130 includes:

[0086] Drive track 131 extends along the front-rear direction of seating frame 100;

[0087] Drive block 132 slides controlled on drive track 131;

[0088] The drive link 133 is hinged at both ends to the drive block 132 and the first folding mechanism 220, respectively.

[0089] The control of the drive block 132 can be implemented in various ways, such as manual control, electric actuator control, and additional control. Figure 10 The drive motor 134 shown is controlled. In this embodiment, the drive motor 134 is motion-coupled with the drive block 132 through a transmission component. When the drive block 132 moves relative to the drive track 131 (i.e., the seating frame 100), the drive linkage 133 drives the first folding mechanism 220 to move.

[0090] Furthermore, the seat frame in this embodiment includes opposing side frames, each side frame being equipped with the rods mentioned above. A synchronizing rod 135 is provided between each side frame, and both ends of the synchronizing rod 135 are connected to a transmission link 136 that links to the first folding mechanism 220 of the corresponding side frame. The transmission link 136 drives the first folding mechanism 220 to move relative to the seating frame 100. The transmission link 136 is a multi-link mechanism and is hinged to the middle of the seventh link 224. The transmission link 136 is located on the opposite side of the two side frames. Both ends of the synchronizing rod 135 pass through each side frame and connect to the corresponding transmission link 136. The middle of the synchronizing rod 135 is connected to the driving link 133. In the height direction, a drive rail 131 is located at the bottom of the seating frame 100, and the driving link 133 extends upward from the seating frame 100 to the seating frame 100 and connects to the synchronizing rod 135. The synchronizing rod 135 is a square tube and rotates circumferentially during movement to control the movement relationship of the rods.

[0091] Independent of the embodiments described above, the seat frame in this application may further include a backrest assembly 400 mounted on the seating frame 100. The backrest assembly 400 moves relative to the seating frame 100 to form a sitting support structure, a relaxing support structure, or a reclining support mechanism. The backrest assembly 400 can be controlled independently or linked with any of the mechanisms mentioned above.

[0092] In conjunction with the foregoing, embodiments of this application also disclose a multifunctional chair, including the chair frame with separate footrests as described in the above-described technical solution. The operation of the multifunctional chair can be achieved by combining the operation of the chair frame described above, and the remaining parts can be implemented by combining existing technology, which will not be repeated here.

[0093] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0094] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A seat frame with separate footrests, characterized in that, The seat frame has an unfolded state and a folded state, and includes: A seating frame has opposing front and rear sides, and a receiving space is provided within the seating frame; The first footrest assembly includes a first pedal and a first folding mechanism connecting the first pedal and the seating frame. The first folding mechanism is a multi-link mechanism, and the first folding mechanism has at least two links that are respectively hinged to the first pedal. The two links are divided into a front link and a opposite rear link according to their hinge positions with the first pedal. The second footrest assembly includes a second pedal and a second folding mechanism connecting the second pedal and the first footrest assembly; The rear rod serves as a linkage rod connected to the second folding mechanism to link the various folding mechanisms. In the unfolded state, the first folding mechanism extends forward from the seating frame, and the second folding mechanism follows the first folding mechanism and extends forward from the first pedal. In the folded state, the second pedal is located within the receiving space, and the first pedal is located in front of the second pedal.

2. The seat frame with separate footrests according to claim 1, characterized in that, The seating frame includes: Base; A hip assembly is mounted on the base, and the receiving space is located below the hip assembly; A drive assembly, mounted on the base, drives the first folding mechanism to switch the seat frame between the unfolded state and the folded state.

3. The seat frame with separate footrests according to claim 2, characterized in that, The driving component includes: The drive track extends along the front-to-back direction of the seating frame; The drive block slides in a controlled manner on the drive track; The drive link is hinged at both ends to the drive block and the first folding mechanism, respectively.

4. The seat frame with separate footrests according to claim 1, characterized in that, The second folding mechanism includes a first link, a second link, and a third link, wherein: The first link is hinged to the second pedal and the third link; The second link is hinged to the first pedal and the second pedal; The third link is hinged to the second link and the first folding mechanism; The second folding mechanism is linked to the first folding mechanism and controls the movement of the second pedal relative to the first pedal.

5. The seat frame with separate footrests according to claim 4, characterized in that, The second link is connected to the second pedal via hinge point A, to the first pedal via hinge point G, and to the third link via hinge point C; the first link is connected to the second pedal via hinge point B and to the third link via hinge point D. Along the extension direction of the second link, hinge point A and hinge point C are located on both sides of hinge point G.

6. The seat frame with separate footrests according to claim 4, characterized in that, The second link is connected to the first pedal via hinge point G, and to the third link via hinge point C; In the unfolded state, the hinge point C is located behind the hinge point G.

7. The seat frame with separate footrests according to claim 4, characterized in that, One end of the linkage is connected to the first pedal via hinge point E, and the other end of the linkage is connected to an adjacent member in the multi-link mechanism via hinge point K. The linkage rod is also connected to the third linkage rod via hinge point F to link the various folding mechanisms, wherein hinge point E and hinge point K are located on both sides of hinge point F along the extension direction of the linkage rod.

8. The seat frame with separate footrests according to claim 7, characterized in that, The first folding mechanism includes a fourth link, a fifth link, a sixth link, and a seventh link, wherein: The fourth link and the sixth link are sequentially hinged between the first pedal and the seating frame, and the fourth link is connected to the first pedal through hinge point H; The fifth link and the seventh link are sequentially hinged between the first pedal and the seating frame. The fifth link is connected to the first pedal through hinge point E. In the unfolded state, hinge point E is located behind hinge point H. The fifth link is hinged to the sixth link as a connecting link.

9. The seat frame with separate footrests according to claim 1, characterized in that, The linkage rod is connected to the second folding mechanism through hinge point F to link the various folding mechanisms. In the unfolded state, the hinge point F is closer to the rear side of the first pedal than to the front and rear sides of the first pedal.

10. A multi-functional seat, characterized in that, Includes a seat frame with separate footrests as described in any one of claims 1 to 9.

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