Seat frame and seat with rising and forward tilting function

Abstract

The present invention relates to a seat frame with a lifting and forward tilting function, comprising a base frame, a lifting assembly, a driving assembly and a telescopic connecting rod assembly; the telescopic connecting rod assembly is connected with a foot connecting member and a backrest connecting member; the driving assembly is used to drive the telescopic connecting rod assembly to change the relative position of the foot connecting member and the backrest connecting member, and the driving assembly is used to drive the lifting of the lifting assembly; the lifting assembly comprises a lifting connecting plate, a first lifting connecting rod, a second lifting connecting rod and a support seat, one end of the first lifting connecting rod and the second lifting connecting rod are respectively rotatably connected to the support seat, the other ends of the first lifting connecting rod and the second lifting connecting rod are respectively rotatably connected to the lifting connecting plate, and the lifting connecting plate is also respectively connected to the driving assembly and the telescopic connecting rod assembly. By replacing the original complex frame structure with a lifting connecting plate, not only the weight of the original seat frame is reduced, but also the assembly error is reduced at the same time, the overall structure is stable and the manufacturing cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of furniture, and in particular to a chair frame and a chair with a rising and forward tilting function. Background Art

[0002] With the development of science and technology and the improvement of people's living standards, people have higher and higher requirements for the versatility of seating units. The function of the elderly chair is mainly to help the elderly with inconvenient legs and feet and poor waist strength to stand up from the sofa, making it easier for the elderly to move.

[0003] In the prior art, in order to stabilize the lifting structure and increase the comfort, the elderly chair adopts the installation of the overall frame. For example, the application number 201510965955.5 discloses a mechanical device of the elderly chair, including a left part, a right part and a lifting base. The left part and the right part are both provided with an elderly chair armrest mounting plate, a second lifting connector, a leg conversion part, a first lifting connector, a front and rear conversion connector, a backrest conversion connector, an elderly chair seat frame mounting plate, a rear mounting bracket, an elderly chair foot rod 1, an elderly chair foot rod 2, an elderly chair foot rod 3, an elderly chair foot rod 4, an elderly chair foot board, an elderly chair connecting rod, a third lifting connector, a front mounting part, a rear mounting part, and a bolt connector; the lifting base includes a chassis, a lifting box, a lifting frame, a lifting connecting rod, a welding connector, and an adjustable connector; an electric device is also provided, and the electric device includes a motor and a motor push rod, the motor is rotatably mounted on the chassis, and the motor push rod is rotatably connected with the welding connector. It is safe and stable, has a firm structure, high installation efficiency, saves materials, and improves the design of the elderly chair.

[0004] However, in order to stabilize the structure of the elderly chair in the prior art, the overall frame used in the lifting mechanism must be welded, which leads to large assembly errors and bulky structure, and the lifting process requires a large driving force to be realized.

[0005] Therefore, it is necessary to provide a seat frame structure that can ensure structural stability while reducing the weight and assembly error of the lifting mechanism. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a seat frame and seat with a rising and tilting function, which replaces the original complex frame structure with a lifting connecting plate, which not only reduces the weight of the original seat frame, but also reduces the assembly error. The overall structure is stable and the production cost is greatly reduced.

[0007] The technical effects of the present invention are achieved as follows:

[0008] The present invention provides a seat frame with a lifting and forward tilting function, comprising a base frame, a lifting assembly, a driving assembly and a telescopic connecting rod assembly; the telescopic connecting rod assembly is connected with a foot connecting piece and a backrest connecting piece; the driving assembly is used to drive the telescopic connecting rod assembly to change the relative position of the foot connecting piece and the backrest connecting piece, and the driving assembly is used to drive the lifting and lowering of the lifting assembly;

[0009] The lifting assembly comprises a lifting connection plate, a first lifting link, a second lifting link and a support seat, wherein the support seat is fixedly connected to the base frame, one end of the first lifting link and the second lifting link are respectively rotatably connected to the support seat, the other ends of the first lifting link and the second lifting link are respectively rotatably connected to the lifting connection plate, and the lifting connection plate is also respectively connected to the driving assembly and the telescopic link assembly;

[0010] The telescopic link assembly comprises a foot link assembly, a back link assembly and an intermediate link assembly, wherein one end of a first intermediate link of the intermediate link assembly is rotatably connected to the backrest connector, and the other end is rotatably connected to the foot link assembly.

[0011] The foot link assembly includes a first foot link, a second foot link, a third foot link and a fourth foot link, one end of the first foot link and the second foot link are both rotatably connected to the foot connecting piece, the other end of the first foot link is rotatably connected to one end of the third foot link, and the other end of the third foot link is connected to the first intermediate link; the other end of the second foot link is rotatably connected to one end of the fourth foot link, the other end of the fourth foot link is rotatably connected to one end of the second intermediate link of the intermediate link assembly, and the other end of the second intermediate link is rotatably connected to the lifting connecting plate.

[0012] Furthermore, the lifting connection plate is an integrated plate-shaped structure, and the driving assembly and the telescopic connecting rod assembly are both riveted to the lifting connection plate.

[0013] Furthermore, the other ends of the first lifting link and the second lifting link are rotatably riveted to the lifting connection plate respectively.

[0014] Furthermore, the lifting assembly and the telescopic link assembly are both in two groups and are symmetrically arranged along the center plane of the base frame. The first lifting link is located below the second lifting link, and a first stabilizing link is provided between the two first lifting links.

[0015] Furthermore, the two support seats are arranged on the outer side of the longitudinal bottom frame of the base frame, the first lifting link is arranged on the outer side of the support seat, and the longitudinal bottom frame is used to limit the lowest descending position of the first stabilizing link.

[0016] Furthermore, a second stabilizing link is connected between the two lifting connecting plates, and the upper end of the supporting seat is used to limit the lowest descending position of the second stabilizing link.

[0017] Furthermore, the driving assembly includes a driving rod, a push rod connecting piece, a lifting connecting piece and a telescopic driving connecting rod assembly; a push rod connecting piece is provided in the middle of the driving rod, and the push rod connecting piece is used to connect with the push rod of the driving source, and the two ends of the driving rod are respectively connected to the lifting connecting pieces, and the lifting connecting pieces are connected to the lifting connecting plate, and the two ends of the driving rod are also connected to the telescopic connecting rod assembly.

[0018] Furthermore, both ends of the driving rod are provided with driving rod rivet plates, the driving rod rivet plates are riveted to the lifting connecting plates, and the telescopic driving connecting rod assembly is connected to the lifting connecting plates.

[0019] Furthermore, the driving end of the telescopic driving connecting rod assembly is riveted to the telescopic connecting rod assembly.

[0020] In addition, the present application also provides a seat, comprising a backrest support portion, a foot support portion and a seat frame, wherein the seat frame comprises a base frame, a lifting assembly, a driving assembly and a telescopic connecting rod assembly;

[0021] The telescopic link assembly is connected with a foot connection piece and a backrest connection piece; the driving assembly is used to drive the telescopic link assembly to change the relative position of the foot connection piece and the backrest connection piece, and the driving assembly is used to drive the lifting and lowering of the lifting assembly; the backrest support part is connected with the backrest connection piece, and the foot support part is connected with the foot connection piece;

[0022] The lifting assembly includes a lifting connection plate, a first lifting link, a second lifting link and a support seat, the support seat is fixedly connected to the base frame, one end of the first lifting link and the second lifting link are respectively rotatably connected to the support seat, the other end of the first lifting link and the second lifting link are respectively rotatably connected to the lifting connection plate, and the lifting connection plate is also respectively connected to the driving assembly and the telescopic link assembly.

[0023] As described above, the present invention has the following beneficial effects:

[0024] (1) A lifting connecting plate is used to replace the original complex frame structure, which not only reduces the weight of the original seat frame, but also reduces the assembly error. The overall structure is stable and the assembly process is simplified, which reduces the production cost and improves the production efficiency.

[0025] (2) The components connected to the lifting connecting plate are riveted, so the positioning is more accurate, the installation error is smaller, and the overall structure is more accurate; all the movements of the seat frame are integrated on the lifting connecting plate used for riveting. As a separate module, the pipe fittings are also used separately, which makes it easier to match with other different bases;

[0026] (3) By directly connecting the two ends of the driving rod to the driven mechanism, the force points are evenly distributed on both sides, the force is more uniform, the drive is more stable, and the shaking of the structure is reduced during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of the seat frame in a sitting position according to an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a portion of a seat frame in a sitting position according to an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of a part of the seat frame in the TV posture state according to an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of a part of the seat frame in a lying state according to an embodiment of the present invention;

[0032] Figure 5 It is a schematic structural diagram of a portion of the seat frame in a standing position according to an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the lifting assembly in a sitting position according to an embodiment of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the lifting assembly in the embodiment of the present invention when it is in a standing position;

[0035] Figure 8 It is a front view of the lifting connecting plate in the embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] In this embodiment, a seat frame with a rising and tilting function is provided, which can be used for a seat unit, specifically for an elderly chair. In this embodiment, the elderly chair is a seat with a changeable posture that can realize the lifting and tilting of the seat part, so as to facilitate users with inconvenient legs or weak bodies to stand up. Accordingly, in this embodiment, the seat frame can change into four postures, corresponding to the sitting posture, TV posture, lying posture and standing posture of the seat, wherein the sitting posture is the state of daily use of the seat, with the legs retracted and the backrest close to vertical, which is suitable for the user to sit down and rest daily, the TV posture is the state of the seat legs extended, and accordingly, the inclination angle of the backrest remains unchanged or slightly tilted backward, which is suitable for the user to relax when watching TV, and the lying posture is that the seat legs are further raised, the backrest is further tilted backward and then dropped, which is suitable for the user to lie flat and rest.

[0039] in, Figure 1 It is a structural schematic diagram of the seat frame in the sitting position according to the embodiment of the present invention. Figure 3 It is a schematic diagram of the structure of a part of the seat frame in the TV posture state according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of a part of the seat frame in a lying state according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a portion of the seat frame in a standing position according to an embodiment of the present invention;

[0040] Specifically, Figure 1-8 As shown, in this embodiment, the seat frame includes a base frame 1, a lifting assembly 2, a driving assembly 3 and a telescopic connecting rod assembly 4; the telescopic connecting rod assembly 4 is connected to a foot connecting member 5 and a backrest connecting member 6; the driving assembly 3 is used to drive the telescopic connecting rod assembly 4 to change the relative position of the foot connecting member 5 and the backrest connecting member 6, and the driving assembly 3 is used to drive the lifting and lowering of the lifting assembly 2;

[0041] The lifting assembly 2 includes a lifting connection plate 21, a first lifting link 22, a second lifting link 23 and a support seat 25. The support seat 25 is fixedly connected to the base frame 1. One end of the first lifting link 22 and the second lifting link 23 are respectively rotatably connected to the support seat 25. The other ends of the first lifting link 22 and the second lifting link 23 are respectively rotatably connected to the lifting connection plate 21. The lifting connection plate 21 is also respectively connected to the driving assembly 3 and the telescopic link assembly 4. By replacing the original complex frame structure with a lifting connection plate, not only the weight of the original seat frame is reduced, but also the assembly error is reduced. The overall structure is stable and the manufacturing cost is greatly reduced.

[0042] Among them, the driving assembly 3 includes a driving rod 31, a push rod connecting piece 32, a lifting connecting piece 33 and a telescopic driving connecting rod assembly 34; a push rod connecting piece 32 is provided in the middle of the driving rod of the telescopic driving connecting rod assembly 34, and the push rod connecting piece 32 is used to connect with the push rod of the driving source, and the two ends of the driving rod 31 are respectively connected to the lifting connecting piece 33, and the lifting connecting piece 33 is connected to the lifting connecting plate 21, and the two ends of the driving rod 31 are also connected to the telescopic connecting rod assembly 4; the driving end of the telescopic driving connecting rod assembly 34 is riveted to the telescopic connecting rod assembly 4.

[0043] Specifically, the telescopic link assembly 4 includes a foot link assembly 41, a back link assembly 42 and an intermediate link assembly 43. One end of a first intermediate link 431 of the intermediate link assembly 43 is rotatably connected to the backrest connector 6, and the other end is rotatably connected to the foot link assembly 41.

[0044] The back connecting rod assembly 42 includes a first backrest connecting rod 421, one end of which is rotatably connected to the backrest connecting member 6, and the other end of which is rotatably connected to the lifting connecting plate 21.

[0045] The foot link assembly 41 includes a first foot link 411, a second foot link 412, a third foot link 413 and a fourth foot link 414. One end of the first foot link 411 and the second foot link 412 are both rotatably connected to the foot connector 5, the other end of the first foot link 411 is rotatably connected to one end of the third foot link 413, and the other end of the third foot link 413 is connected to the first intermediate link 431; the other end of the second foot link 412 is rotatably connected to one end of the fourth foot link 414, the other end of the fourth foot link 414 is rotatably connected to one end of the second intermediate link 432 of the intermediate link assembly 43, and the other end of the second intermediate link 432 is rotatably connected to the lifting connection plate 21;

[0046] The telescopic drive link assembly 34 includes a telescopic drive link 341 and a telescopic drive connecting piece 342, wherein the lifting connecting piece 33 is rotatably connected to one end of the telescopic drive link 341, and the other end of the telescopic drive link 341 is rotatably connected to the telescopic drive connecting piece 342, and at the same time, the telescopic drive connecting piece 342 is fixedly connected to the first intermediate link 431, and in this embodiment is fixed by riveting. The rotational connection mode of the above-mentioned components can be riveted rotation, or can be realized by the cooperation of a pin shaft, a step bolt, etc.

[0047] Furthermore, the lifting connection plate 21 is an integrated plate-shaped structure, and the driving assembly 3 and the telescopic connecting rod assembly 4 are riveted to the lifting connection plate 21;

[0048] The other ends of the first lifting link 22 and the second lifting link 23 are rotatably riveted to the lifting connection plate 21 respectively.

[0049] As described above, the components connected to the lifting connecting plate are riveted, so the positioning is more accurate, the installation error is smaller, and the overall structure is more accurately matched.

[0050] Specifically, in this embodiment, the seat frame is a bilaterally symmetrical structure, the lifting assembly 2 and the telescopic link assembly 4 are both two groups and are symmetrically arranged along the center plane of the base frame 1, the first lifting link 22 is located below the second lifting link, and a first stabilizing link 24 is provided between the two first lifting links 22. The transmission methods on both sides are the same, and stable driving without error can be achieved. Specifically, in order to achieve the stability of the transmission mechanism on both sides, two support seats 25 are provided on the outer side of the longitudinal bottom frame 11 of the base frame 1, the first lifting link 22 is provided on the outer side of the support seat 25, and the longitudinal bottom frame 11 is used to limit the lowest descending position of the first stabilizing link 24.

[0051] When the seat switches from a standing position to a sitting position, during the descent of the first lifting link 22, the first stabilizing link 24 stops descending after hitting the longitudinal bottom frame 11. Therefore, the first stabilizing link 24 not only increases the stability of the first lifting link 22, so that the two first lifting links 22 will not shake relative to each other during movement, and have higher strength, but also plays a limiting and supporting role at the same time, limiting the lowest position of its descent, so that the structure below can provide stable support during the switching of the seat between a sitting position, a TV position and a lying position.

[0052] Furthermore, a second stabilizing link 35 is connected between the two lifting connecting plates 21. In the present embodiment, the upper end of the support seat 25 is used to limit the lowest descending position of the second stabilizing link 35. In other embodiments, a limiting mechanism may be further provided on the base frame to cooperate with the second stabilizing link 35 for limiting. The second stabilizing link 35 not only strengthens the stability of the two lifting connecting plates 21, but also further ensures the limitation of the lowest descending point, and serves as a double insurance with the first stabilizing link 24.

[0053] In addition, the seat frame in this embodiment is specifically driven by a driving motor. Figure 1-6 The push rod connector 32 is rotatably connected to one end of the motor push rod 71 of the drive motor 7 , and the housing 72 of the drive motor 7 is rotatably connected to the base frame 1 .

[0054] The motor push rod 71 can be divided into a first position, a second position, a third position and a fourth position according to its extension degree, which respectively correspond to the four postures of the seat, namely, lying posture, TV posture, sitting posture and standing posture.

[0055] When the motor push rod 71 is in the third position, that is, the sofa is in a sitting position, the foot link assembly 41 is in a retracted state. At this time, the motor push rod 71 is driven to retract, and the drive rod 31 is driven to move toward the motor housing through the push rod connector 32. The drive rod 31 drives the telescopic drive link 341 by driving the lifting connection piece 33 to rotate, thereby further driving the telescopic drive connection piece 342 to drive the first intermediate link 431 to move toward the backrest connector. The foot link assembly 41 is thus changed from a retracted state to an extended state, and finally the motor push rod 71 moves to the second position, so that it is adjusted to the TV position.

[0056] When the motor push rod 71 is in the second position, the motor push rod 71 is further retracted, and the foot connecting rod assembly 41 is further lifted. The backrest connecting member 6 is tilted backward under the drive of the first intermediate connecting rod 431. When the motor push rod 71 finally moves from the second position to the first position, the foot connecting member 5 is higher than the backrest connecting member 6 to form a lying position.

[0057] The process of switching the sofa from a lying position to a TV position and from a TV position to a sitting position is to move the motor push rod 71 from the first position to the second position and from the second position to the third position. The specific transmission relationship is opposite to the aforementioned stretching and opening process and will not be repeated here.

[0058] In addition, when the motor push rod 71 is further pushed forward from the third position to the fourth position, the seat will switch from the sitting position to the standing position. At this time, the specific process is that the motor push rod 71 drives the driving rod 31 to move forward and upward through the push rod connecting piece 32, and the driving rod 31 drives the upper end of the lifting connecting plate 21 to move through the lifting connecting piece 33. Since the lifting connecting plate 21 is rotatably connected with the first lifting connecting rod 22 and the second lifting connecting rod 23 at the same time, combined with the attached Figure 7-8 It can be seen that the first lifting link 22, the second lifting link 23 and the support seat 25 fixed on the base frame 1 are rotatably connected, so that the lifting connecting plate 21 rises with a predetermined arc, and drives the telescopic link assembly 4 connected to the lifting connecting plate 21 to rise together, and the telescopic link assembly 4 is in a forward tilting state, and the motor push rod 71 reaches the fourth position, thereby forming a final standing posture, so that people such as the elderly with weaker physical strength can stand up more effortlessly.

[0059] Embodiment 2:

[0060] In this embodiment, a chair is provided, comprising a backrest support, a foot support and a chair frame, wherein the chair frame comprises a base frame 1, a lifting assembly 2, a driving assembly 3 and a telescopic connecting rod assembly 4; the backrest support is fixedly connected to the backrest connector 6 to achieve posture change, and the foot support is connected to the foot connector 5 to achieve posture change. Specifically, the chair in this embodiment can realize a chair with a changeable posture with the seat part lifted and tilted forward, which is convenient for users with inconvenient legs or weak bodies to assist in standing up. Accordingly, in this embodiment, the chair frame can change four postures, corresponding to the sitting posture, TV posture, lying posture and standing posture of the chair, wherein the sitting posture is the state of daily use of the chair, and the legs are retracted and the backrest is close to vertical, which is suitable for the user to sit down and rest in daily life. The TV posture is the state of the seat legs being extended, and accordingly, the inclination angle of the backrest remains unchanged or slightly tilted backward, which is suitable for the user to be in a relaxed state when watching TV, and the lying posture is that the legs of the seat are further raised, the backrest is further tilted backward and then dropped, which is suitable for the user to lie flat and rest.

[0061] The telescopic link assembly 4 is connected with a foot connection piece 5 and a backrest connection piece 6; the driving assembly 3 is used to drive the telescopic link assembly 4 to change the relative position of the foot connection piece 5 and the backrest connection piece 6, and the driving assembly 3 is used to drive the lifting assembly 2 to rise and fall; the backrest support part is connected to the backrest connection piece 6, and the foot support part is connected to the foot connection piece 5;

[0062] The lifting assembly 2 includes a lifting connection plate 21, a first lifting link 22, a second lifting link 23 and a support seat 25. The support seat 25 is fixedly connected to the base frame 1. One end of the first lifting link 22 and the second lifting link 23 are respectively rotatably connected to the support seat 25. The other ends of the first lifting link 22 and the second lifting link 23 are respectively rotatably connected to the lifting connection plate 21. The lifting connection plate 21 is also respectively connected to the driving assembly 3 and the telescopic link assembly 4. By replacing the original complex frame structure with a lifting connection plate, not only the weight of the original seat frame is reduced, but also the assembly error is reduced. The overall structure is stable and the manufacturing cost is greatly reduced.

[0063] Specifically, the connection method of its related components can refer to the connection method of the seat frame in Example 1, and will not be repeated again.

[0064] As described above, the present invention has the following beneficial effects:

[0065] (1) A lifting connecting plate is used to replace the original complex frame structure, which not only reduces the weight of the original seat frame, but also reduces assembly errors. The overall structure is stable and the production cost is greatly reduced;

[0066] (2) The components connected to the lifting connecting plate are riveted, so the positioning is more accurate, the installation error is smaller, and the overall structure is more accurate;

[0067] (3) By directly connecting the two ends of the driving rod to the driven mechanism, the force points are evenly distributed on both sides, the force is more uniform, the drive is more stable, and the shaking of the structure is reduced during the lifting process.

[0068] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0069] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0070] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A seat frame with a rising and forward tilting function, characterized in that: The invention comprises a base frame (1), a lifting assembly (2), a driving assembly (3) and a telescopic connecting rod assembly (4); the telescopic connecting rod assembly (4) is connected to a foot connecting member (5) and a backrest connecting member (6); the driving assembly (3) is used to drive the telescopic connecting rod assembly (4) to change the relative position of the foot connecting member (5) and the backrest connecting member (6), and the driving assembly (3) is used to drive the lifting assembly (2) to move upward and downward; The lifting assembly (2) comprises a lifting connection plate (21), a first lifting link (22), a second lifting link (23) and a support seat (25); the support seat (25) is fixedly connected to the base frame (1); one end of the first lifting link (22) and the second lifting link (23) are respectively rotatably connected to the support seat (25); the other ends of the first lifting link (22) and the second lifting link (23) are respectively rotatably connected to the lifting connection plate (21); and the lifting connection plate (21) is also respectively connected to the driving assembly (3) and the telescopic link assembly (4); The telescopic link assembly (4) comprises a foot link assembly (41), a back link assembly (42) and an intermediate link assembly (43); one end of a first intermediate link (431) of the intermediate link assembly (43) is rotatably connected to the backrest connecting member (6), and one end is rotatably connected to the foot link assembly (41); the foot link assembly (41) comprises a first foot link (411), a second foot link (412), a third foot link (413) and a fourth foot link (414); one end of each of the first foot link (411) and the second foot link (412) is rotatably connected to the footrest connecting member (6). The first foot connecting rod (411) is rotatably connected to one end of the third foot connecting rod (413), and the other end of the third foot connecting rod (413) is connected to the first intermediate connecting rod (431); the other end of the second foot connecting rod (412) is rotatably connected to one end of the fourth foot connecting rod (414), and the other end of the fourth foot connecting rod (414) is rotatably connected to one end of the second intermediate connecting rod (432) of the intermediate connecting rod assembly (43), and the other end of the second intermediate connecting rod (432) is rotatably connected to the lifting connecting plate (21); The lifting connection plate (21) is an integrated plate-shaped structure, and the driving assembly (3) and the telescopic connecting rod assembly (4) are both riveted to the lifting connection plate (21); The lifting assembly (2) and the telescopic connecting rod assembly (4) are each comprised of two groups and are symmetrically arranged along the center plane of the base frame (1); the first lifting connecting rod (22) is located below the second lifting connecting rod; and a first stabilizing connecting rod (24) is provided between the two first lifting connecting rods (22).

2. A seat frame with a rising and forward tilting function according to claim 1, characterized in that: The other ends of the first lifting link (22) and the second lifting link (23) are rotatably riveted to the lifting connection plate (21) respectively.

3. A seat frame with a rising and forward tilting function according to claim 1, characterized in that: The two support seats (25) are arranged on the outer side surface of the longitudinal bottom frame (11) of the base frame (1), the first lifting connecting rod (22) is arranged on the outer side surface of the support seat (25), and the longitudinal bottom frame (11) is used to limit the lowest descending position of the first stabilizing connecting rod (24).

4. The seat frame with the function of ascending and tilting forward according to claim 1, characterized in that: A second stabilizing link (35) is connected between the two lifting connection plates (21), and the upper end of the support seat (25) is used to limit the lowest descending position of the second stabilizing link (35).

5. A seat frame with a rising and forward tilting function according to any one of claims 1 to 4, characterized in that: The driving assembly (3) comprises a driving rod (31), a push rod connecting piece (32), a lifting connecting piece (33) and a telescopic driving connecting rod assembly (34); a push rod connecting piece (32) is provided in the middle of the driving rod, the push rod connecting piece (32) is used to be connected to a push rod of a driving source, the two ends of the driving rod (31) are respectively connected to the lifting connecting piece (33), the lifting connecting piece (33) is connected to the lifting connecting plate (21), and the two ends of the driving rod (31) are also connected to the telescopic connecting rod assembly (4).

6. A seat frame with a rising and forward tilting function according to claim 5, characterized in that: Both ends of the driving rod (31) are provided with driving rod riveting plates (311), the driving rod riveting plates (311) are riveted to the lifting connection plates (33), and the telescopic driving connecting rod assembly (34) is connected to the lifting connection plates (33).

7. The seat frame with the function of ascending and tilting forward according to claim 5, characterized in that: The driving end of the telescopic driving connecting rod assembly (34) is riveted to the telescopic connecting rod assembly (4).

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