Multi-unit assembly type seat framework structure

Abstract

The utility model relates to the technical field of sofa manufacturing, in particular to a multi-unit assembly type seat framework structure which is characterized in that armrest frames are vertically arranged on two sides of a cushion frame and fixedly connected with the cushion frame, and telescopic frames of supporting leg assemblies are arranged on the armrest frames and driven by a power device to drive a leg leaning plate to move. The chair back frame is connected with the armrest frame through a movable frame, the movable frame is connected with the telescopic frame through a first transmission rod, and the power device synchronously drives the movable frame to swing when driving the telescopic frame. The sofa frame is formed by assembling a plurality of support units, the armrest frame, the cushion frame, the chair back frame and the supporting leg assembly can be independently packaged and are convenient to transport, the sofa frame structure is modularly arranged, if a certain support unit is damaged, only the support unit needs to be replaced, and the whole sofa frame does not need to be replaced, so that the maintenance cost is reduced; the supporting angle of the chair back frame and the leg leaning plate of the sofa frame can be adjusted under the driving of the power device, so that a user can experience a lying posture besides a sitting posture, and the practicability and comfort of the sofa frame are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sofa manufacturing, in particular to a multi-unit assembled seat frame structure. Background Art

[0002] Traditional sofas adopt a fixed integral structure, that is, the bottom frame, backrest, armrests, and the seat cushion and back cushion thereon are all an integral whole, which is not only large in volume but also very heavy. With the increasing demand for sofas, the functional requirements for sofas also increase accordingly. The support components of some sofas adopt a fixed frame, and a leg component that can be extended and retracted is added to improve its practicality and comfort.

[0003] Currently, when the leg component of the sofa is not in use, it is accommodated in the space below the seat cushion bracket in cooperation with the adjustment mechanism and is integrally provided with the seat cushion bracket; therefore, when the sofa leaves the factory, the armrests, seat cushion, and bottom frame are all assembled, and only the backrest part is provided as loose parts, resulting in a large volume of the sofa when leaving the factory, which is not conducive to packaging and transportation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a multi-unit assembled seat frame structure aiming at the defects existing in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A multi-unit assembled seat frame structure, comprising: an armrest frame, a seat cushion frame, a backrest frame, and a leg component. The armrest frame is vertically arranged on both sides of the seat cushion frame and is fixedly connected thereto. The leg component is connected to the armrest frame and is located below the seat cushion frame;

[0007] The leg component includes a leg plate, a telescopic frame, and a power device. The telescopic frame is arranged on the armrest frame and is connected to the leg plate. The power device is connected to the two armrest frames through a support beam and drives the leg plate to move through the telescopic frame;

[0008] The backrest frame is connected to the armrest frame through a movable frame. The movable frame includes a first connection part, a second connection part, and a support plate. The first connection part is rotatably connected to the armrest frame. The second connection part is connected to the telescopic frame through a first transmission rod. The backrest frame is fixedly connected to the support plate.

[0009] Furthermore, a first connection seat and a second connection seat are respectively arranged at both ends of the length of the armrest frame. The first connection part and the telescopic frame are respectively rotatably connected to the first connection seat and the second connection seat;

[0010] The first transmission rod is connected to the telescopic frame through a linkage rod. The first transmission rod and the linkage rod are respectively rotatably connected at one end of their lengths, and the other ends are respectively rotatably connected to the movable frame and the second connection seat. A limiting chute is formed in the linkage rod, and the telescopic frame is slidably connected to the limiting chute through a connecting rod;

[0011] The connecting rod is arranged on the first driving link of the telescopic frame close to the linkage rod. The limiting chute includes an arc portion and a straight portion. The straight portion is located at one end of the arc portion away from the second connection seat. The arc portion is correspondingly arranged with the swinging path of the connecting rod, and the straight portion extends along the radial direction of the arc portion towards the direction away from its center.

[0012] Further, the first driving link and the second driving link of the telescopic frame are respectively rotatably connected to the first driven link and the second driven link. The second driving link and the first driven link are cross - arranged and rotatably connected through a pin;

[0013] Both the first driving link and the second driving link are rotatably connected to the second connection seat. Both the first driven link and the second driven link are connected to the leg support plate through a third connection seat.

[0014] Further, the power device includes an electric cylinder vertically arranged on the support beam. The support beam is fixedly connected to the two armrest frames respectively through fourth connection seats arranged at both ends thereof;

[0015] The output shaft of the electric cylinder is connected to the telescopic frame through a second transmission rod. The two ends of the second transmission rod are respectively connected to the two first driving links on the two telescopic frames, and the first transmission rod is connected to the first driving link.

[0016] Further, fifth connection seats are arranged on both sides of the bottom of the backrest frame close to the armrest frame. The backrest frame is connected to the support plate through the fifth connection seats, and a card slot is formed in the fifth connection seat corresponding to the support plate.

[0017] Further, the width of the support plate gradually becomes narrower in the direction away from the first connection portion. The support plate is arranged between the first connection portion and the second connection portion and is located above them;

[0018] A first through - hole is formed in the support plate, and a second through - hole is formed in the bottom of the card slot corresponding to the first through - hole.

[0019] Further, a sixth connection seat is arranged at the horizontal end of the armrest frame away from the first connection seat. The seat cushion frame is fixedly connected to the first connection seats and the sixth connection seats on the two armrest frames on both sides.

[0020] Furthermore, a plurality of hooks are oppositely arranged on both sides of the seat cushion frame, and the two oppositely arranged hooks are respectively connected to both ends of a serpentine spring.

[0021] Furthermore, a limiting block and a baffle are arranged on the first driving link corresponding to the end of the second transmission rod, and the limiting blocks are oppositely arranged on the upper and lower sides of the second transmission rod;

[0022] The baffle is located on the side of the second transmission rod facing away from the power device, and the second transmission rod is fixedly connected thereto through a bolt arranged on the baffle.

[0023] Furthermore, a U-shaped support is arranged on the second transmission rod corresponding to the power device, and the output shaft of the electric cylinder is rotatably connected to the U-shaped support through a pin shaft.

[0024] The beneficial effects of the present utility model are as follows:

[0025] In the present application, the sofa frame is assembled and formed by a plurality of bracket units, wherein the armrest frame, the seat cushion frame, the backrest frame and the leg support assembly can all be independently packaged, which is convenient for transportation. Moreover, the structure of the sofa frame is modularized. If a certain bracket unit is damaged, only this bracket unit needs to be replaced instead of the entire sofa frame, reducing the maintenance cost; the backrest frame and the leg support plate of the sofa frame can adjust the support angle under the drive of the power device, enabling the user to experience a lying posture in addition to the sitting posture, improving the practicability and comfort of the sofa frame. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a structural schematic diagram of the multi-unit assembled seat frame structure in Embodiment 1;

[0028] Figure 2 It is an exploded schematic diagram of the multi-unit assembled seat frame structure in Embodiment 1;

[0029] Figure 3 It is a structural schematic diagram of the armrest frame in Embodiment 1;

[0030] Figure 4 It is a structural schematic diagram of the connection between the backrest frame and the armrest frame in Embodiment 1;

[0031] Figure 5 For Figure 4Enlarged view of the local structure at A in [the figure];

[0032] Figure 6 is Figure 2 Enlarged view of the local structure at B in [the figure];

[0033] Figure 7 Schematic diagram of the structure of the seat cushion frame in Embodiment 1;

[0034] Figure 8 Schematic diagram of the unfolded state of the multi - unit assembled seat skeleton structure in Embodiment 1;

[0035] Figure 9 Schematic diagram of the structure of the multi - unit assembled seat skeleton structure in Embodiment 2;

[0036] Figure 10 Schematic diagram of the connection structure of the linkage rod in Embodiment 2;

[0037] Figure 11 Schematic diagram of the semi - reclined posture sofa frame structure in Embodiment 2;

[0038] Figure 12 Schematic diagram of the fully reclined posture sofa frame structure in Embodiment 2.

[0039] Reference numerals: 1, armrest frame; 11, first connection seat; 12, second connection seat; 13, movable frame; 131, first connection part; 132, second connection part; 133, support plate; 133a, first through - hole; 14, first transmission rod; 15, fourth connection seat; 16, sixth connection seat; 2, seat cushion frame; 21, hook; 22, serpentine spring; 3, backrest frame; 31, fifth connection seat; 311, card slot; 312, second through - hole; 4, leg support assembly; 41, leg - resting plate; 42, telescopic frame; 421, first driving link; 421a, limit block; 421b, baffle; 422, second driving link; 423, first driven link; 424, second driven link; 425, pin; 426, third connection seat; 43, power device; 431, electric cylinder; 432, support beam; 433, second transmission rod; 434, U - shaped support; 435, pin shaft; 5, linkage rod; 51, limit chute; 511, arc part; 512, straight part; 52, connecting rod. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0041] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] A multi-unit assembled seat frame structure disclosed by the present invention includes an armrest frame 1, a seat cushion frame 2, a backrest frame 3 and a leg support assembly 4. The armrest frame 1 is vertically arranged on both sides of the seat cushion frame 2 and fixedly connected thereto. The leg support assembly 4 is connected to the armrest frame 1 and is located below the seat cushion frame 2. The leg support assembly 4 includes a leg rest plate 41, a telescopic frame 42 and a power device 43. The telescopic frame 42 is arranged on the armrest frame 1 and connected to the leg rest plate 41. The power device 43 is connected to the two armrest frames 1 through a support beam 432 and drives the leg rest plate 41 to move through the telescopic frame 42. The backrest frame 3 is connected to the armrest frame 1 through a movable frame 13. The movable frame 13 includes a first connection portion 131, a second connection portion 132 and a support plate 133. The first connection portion 131 is rotatably connected to the armrest frame 1. The second connection portion 132 is connected to the telescopic frame 42 through a first transmission rod 14. The backrest frame 3 is fixedly connected to the support plate 133.

[0044] Embodiment 1

[0045] As Figures 1 to 8 shown, the sofa frame is assembled and formed by a plurality of bracket units. Among them, the armrest frame 1, the seat cushion frame 2, the backrest frame 3 and the leg support assembly 4 can all be independently packaged, which is convenient for transportation. And the sofa frame structure is modularly arranged. If a certain bracket unit is damaged, only this bracket unit needs to be replaced without replacing the whole sofa frame, which reduces the maintenance cost. The backrest frame 3 and the leg rest plate 41 of the sofa frame can adjust the support angle under the drive of the power device 43, enabling users to experience a lying position in addition to the sitting position, improving the practicality and comfort of the sofa frame.

[0046] In this embodiment, as Figure 3As shown in the figure, a first connecting seat 11 and a second connecting seat 12 are respectively arranged at both ends of the armrest frame 1 in terms of length. The first connecting portion 131 and the telescopic frame 42 are respectively rotatably connected to the first connecting seat 11 and the second connecting seat 12. The two telescopic frames 42 are respectively arranged inside the two armrest frames 1, and the movable frame 13 is arranged inside the two armrest frames 1 in cooperation with the telescopic frames 42.

[0047] Further, the first driving link 421 and the second driving link 422 of the telescopic frame 42 are respectively rotatably connected to the first driven link 423 and the second driven link 424. The second driving link 422 and the first driven link 423 are arranged in a crossed manner and are rotatably connected through a pin 425. Both the first driving link 421 and the second driving link 422 are rotatably connected to the second connecting seat 12. Both the first driven link 423 and the second driven link 424 are connected to the legrest plate 41 through a third connecting seat 426.

[0048] The power device 43 includes an electric cylinder 431 vertically arranged on the support beam 432. The support beam 432 is respectively fixedly connected to the two armrest frames 1 through fourth connecting seats 15 arranged at both ends thereof. The output shaft of the electric cylinder 431 is connected to the telescopic frame 42 through a second transmission rod 433. The two ends of the second transmission rod 433 are respectively connected to the two first driving links 421 on the two telescopic frames 42, and the first transmission rod 14 is connected to the first driving link 421.

[0049] The telescopic frame 42 realizes a telescopic action under the drive of the output shaft of the electric cylinder 431. When the electric cylinder 431 works, its output shaft drives the first driven link 423 to swing through the first driving link 421. The first driven link 423 and the second driving link 422 are arranged in a crossed manner and are rotatably connected through a pin 425, so that the first driven link 423 drives the second driving link 422 to move synchronously, and further drives the first driven link 423 and the second driven link 424 to complete a telescopic movement under the cooperation of its limiting effect, realizing the unfolding or retracting of the legrest plate 41.

[0050] The first driving link 421 drives the movable frame 13 to swing through the first transmission rod 14, so that the support plate 133 on the movable frame 13 moves around its rotation axis. The backrest frame 3 is fixed on the support plate 133, so that during the process of the electric cylinder 431 driving the legrest plate 41 to unfold or retract, the backrest frame 3 is synchronously driven to recline or prop up.

[0051] In this embodiment, as Figure 4 and Figure 5 shown, fifth connecting seats 31 are arranged on both sides of the bottom of the backrest frame 3 close to the armrest frame 1. The backrest frame 3 is connected to the support plate 133 through the fifth connecting seats 31, and clamping grooves 311 corresponding to the support plate 133 are formed on the fifth connecting seats 31.

[0052] The width of the support plate 133 gradually narrows in the direction away from the first connecting portion 131. The support plate 133 is disposed between the first connecting portion 131 and the second connecting portion 132 and is located above them. A first through hole 133a is formed in the support plate 133, and a second through hole 312 is formed at the bottom of the card slot 311 corresponding to the first through hole 133a.

[0053] The backrest frame 3 is engaged with the support plate 133 on the movable frame 13 through the card slot 311 on the fifth connecting seat 31 provided at its bottom, completing the movable connection with the two side armrest frames 1. Specifically, after the two relatively arranged armrest frames 1 are fixedly connected by the seat cushion frame 2, the distance between the two movable frames 1 relatively arranged on the two armrest frames 1 is fixed at this time, ensuring that the two fifth connecting seats 31 on both sides of the backrest frame 3 can be mutually engaged with the two support plates 133 on the two movable frames 1.

[0054] The support plate 133 is inclined upward and its width gradually narrows, facilitating the engagement of the backrest frame 3 with the movable frame 13 from top to bottom. Finally, the bottom end of the fifth connecting seat 31 abuts against the first connecting portion 131 and the second connecting portion 132, and finally, it is fixedly connected by a bolt passing through the first through hole 133a and the second through hole 312, realizing the fixed connection between the backrest frame 3 and the armrest frame 1.

[0055] In this embodiment, as Figure 2 and Figure 3 shown, a sixth connecting seat 16 is provided at the horizontal end of the armrest frame 1 away from the first connecting seat 11, and the seat cushion frame 2 is fixedly connected to the first connecting seat 11 and the sixth connecting seat 16 on the two side armrest frames 1. Through a set of first connecting seats 11 and a set of sixth connecting seats 16 relatively arranged on the two armrest frames 1, the four corners of the seat cushion frame 2 are fixedly connected to the two side armrest frames 1.

[0056] Furthermore, as Figure 7 shown, a plurality of hooks 21 are relatively arranged on both sides of the seat cushion frame 2, and the two relatively arranged hooks 21 are respectively connected to both ends of the serpentine spring 22. A plurality of serpentine springs 22 are juxtaposed on the seat cushion frame 2 through the hooks 21 at both ends, which are used to fix the seat cushion, improving the stability and comfort of the seat cushion.

[0057] As Figure 2 shown, a limiting block 421a and a baffle 421b are provided at the end of the first driving link 421 corresponding to the end of the second transmission link 433. The limiting block 421a is relatively arranged on the upper and lower sides of the second transmission link 433; the baffle 421b is located on the side of the second transmission link 433 facing away from the power device 43, and the second transmission link 433 is fixedly connected to it through a bolt provided on the baffle 421b. The two relatively arranged limiting blocks 421a facilitate the fixed connection between the end of the second transmission link 433 and the first driving link 421.

[0058] As Figure 6 shown, a U-shaped support 434 is provided on the second transmission rod 433 corresponding to the power device 43. The output shaft of the electric cylinder 431 is rotatably connected to the U-shaped support 434 through a pin shaft 435. The electric cylinder 431 is rotatably connected to the support beam 432. The rotation axis of the pin shaft 435 on the output shaft of the electric cylinder 431 is arranged along the length direction of the second transmission rod 433, which is convenient for the electric cylinder 431 to adaptively adjust its own installation angle during the process of driving the telescopic frame 42 to move, and avoid interfering with the normal telescopic movement of the telescopic frame 42.

[0059] Embodiment 2

[0060] As Figures 9 to 12 shown, the first transmission rod 14 is connected to the telescopic frame 42 through the linkage rod 5. The first transmission rod 14 and the linkage rod 5 are respectively rotatably connected at one end of their lengths, and the other ends are respectively rotatably connected to the movable frame 13 and the second connecting seat 12. A limiting sliding groove 51 is formed on the linkage rod 5. The telescopic frame 42 is slidably connected to the limiting sliding groove 51 through the connecting rod 52. The connecting rod 52 is arranged on the first driving link 421 of the telescopic frame 42 close to the linkage rod 5. The limiting sliding groove 51 includes an arc portion 511 and a straight portion 512. The straight portion 512 is located at one end of the arc portion 511 away from the second connecting seat 12. The arc portion 511 is arranged corresponding to the swinging path of the connecting rod 52. The straight portion 512 extends along the radial direction of the arc portion 511 towards the direction away from its center.

[0061] In the specific implementation process, the electric cylinder 431 adjusts the support angle of the leg rest plate 41 through the telescopic frame 42, and the telescopic clamp further drives the movable frame 13 to swing through the linkage rod 5, so as to realize the adjustment of the support angle of the backrest frame 3 on the movable frame 13. By using the same electric cylinder 431 in cooperation with the linkage rod 5, the adjustment of the leg rest plate 41 and the backrest frame 3 in the sofa frame structure can be realized respectively, so that the sofa frame structure can adapt to the sitting and lying postures of users. The adjustment structure is simple and the operation is convenient, which greatly improves the practicability and comfort of the sofa.

[0062] Specifically, when the sofa frame is in a semi-reclined posture, refer to Figure 11 shown. At this time, the position of the backrest frame 3 is kept unchanged. During the process of driving the leg rest plate 41 to rise, the electric cylinder 431 is started to drive the telescopic frame 42 to extend. The connecting rod 52 slides along the arc portion 511 of the limiting sliding groove 51. At this time, both the first transmission rod 14 and the linkage rod 5 maintain their positions unchanged until the connecting rod 52 slides to one end of the arc portion 511 close to the straight portion 512. At this time, the leg rest plate 41 is completely lifted and the angle adjustment is completed.

[0063] Further start the adjustment of the fully reclined posture of the sofa frame. Refer to Figure 12As shown, on the basis of the semi-reclined posture, the telescopic frame 42 is further extended by the electric cylinder 431 to further support the leg rest 41. At the same time, the connecting rod 52 slides to the straight portion 512 of the limit chute 51. During the further extension of the telescopic frame 42, the connecting rod 52 pulls the linkage rod 5 to swing through the limit chute 51, and further drives the movable frame 13 to swing through the first transmission rod 14, driving the backrest frame 3 to recline and adjust until the connecting rod 52 slides to one end of the straight portion 512 away from the arc portion 511, completing the adjustment of the support angle of the backrest frame 3 and adjusting the sofa frame to a flat posture.

[0064] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-unit assembled seat frame structure, characterized in that, Comprising: An armrest frame, a seat cushion frame, a backrest frame and a leg support assembly. The armrest frame is vertically arranged on both sides of the seat cushion frame and fixedly connected thereto. The leg support assembly is connected to the armrest frame and located below the seat cushion frame; The leg support assembly includes a leg rest plate, a telescopic frame and a power device. The telescopic frame is arranged on the armrest frame and connected to the leg rest plate. The power device is connected to the two armrest frames through a support beam and drives the leg rest plate to move through the telescopic frame; The backrest frame is connected to the armrest frame through a movable frame. The movable frame includes a first connection portion, a second connection portion and a support plate. The first connection portion is rotatably connected to the armrest frame. The second connection portion is connected to the telescopic frame through a first transmission rod. The backrest frame is fixedly connected to the support plate.

2. The multi-unit assembled seat frame structure according to claim 1, characterized in that, A first connection seat and a second connection seat are respectively arranged at both ends of the length of the armrest frame. The first connection portion and the telescopic frame are respectively rotatably connected to the first connection seat and the second connection seat; The first transmission rod is connected to the telescopic frame through a linkage rod. The first transmission rod and the linkage rod are respectively rotatably connected through one end of their lengths, and the other ends are respectively rotatably connected to the movable frame and the second connection seat. A limiting chute is formed in the linkage rod. The telescopic frame is slidably connected to the limiting chute through a connecting rod; The connecting rod is arranged on a first driving link of the telescopic frame close to the linkage rod. The limiting chute includes an arc portion and a straight portion. The straight portion is located at one end of the arc portion away from the second connection seat. The arc portion is arranged corresponding to the swinging path of the connecting rod. The straight portion extends along the radial direction of the arc portion towards a direction away from its center; 3. The multi-unit assembled seat frame structure according to claim 2, characterized in that, The first driving link and the second driving link of the telescopic frame are respectively rotatably connected to a first driven link and a second driven link. The second driving link and the first driven link are cross - arranged and rotatably connected through a pin; The first driving link and the second driving link are both rotatably connected to the second connection seat. The first driven link and the second driven link are both connected to the leg rest plate through a third connection seat.

4. The multi-unit assembled seat frame structure according to claim 3, wherein The power device includes an electric cylinder vertically arranged on the support beam. The support beam is fixedly connected to the two armrest frames respectively through fourth connection seats arranged at both ends thereof; The output shaft of the electric cylinder is connected to the telescopic frame through a second transmission rod. The two ends of the second transmission rod are respectively connected to two first driving links on the two telescopic frames. The first transmission rod is connected to the first driving link.

5. The multi-unit assembled seat frame structure according to claim 1, wherein Fifth connection seats are respectively arranged on both sides of the bottom of the backrest frame close to the armrest frame. The backrest frame is connected to the support plate through the fifth connection seats. Corresponding to the support plate, a card slot is formed in the fifth connection seat.

6. The multi-unit assembled seat frame structure according to claim 5, characterized in that The width of the support plate gradually becomes narrower in the direction away from the first connection portion. The support plate is arranged between the first connection portion and the second connection portion and is located above the two; A first through - hole is formed in the support plate. A second through - hole is formed in the bottom of the card slot corresponding to the first through - hole.

7. The multi-unit assembled seat frame structure according to claim 2, wherein, A sixth connecting seat is provided at the horizontal end of the armrest frame away from the first connecting seat, and the seat cushion frame is fixedly connected to the first connecting seat and the sixth connecting seat on the two side armrest frames.

8. The multi-unit assembled seat frame structure according to claim 1, characterized in that, A plurality of hooks are oppositely arranged on both sides of the seat cushion frame, and the two oppositely arranged hooks are respectively connected to both ends of a serpentine spring.

9. The multi-unit assembled seat frame structure according to claim 4, wherein, A limiting block and a baffle are provided at the end of the first driving link corresponding to the second transmission rod, and the limiting blocks are oppositely arranged on the upper and lower sides of the second transmission rod; The baffle is located on the side of the second transmission rod facing away from the power device, and the second transmission rod is fixedly connected thereto by bolts provided on the baffle.

10. The multi-unit assembled seat frame structure according to claim 4, characterized in that, A U-shaped support is provided on the second transmission rod corresponding to the power device, and the output shaft of the electric cylinder is rotatably connected to the U-shaped support by a pin shaft.

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