CN220966861U

CN220966861U - Integrated telescopic seat frame and seat

Info

Publication number: CN220966861U
Application number: CN202322456851.4U
Authority: CN
Inventors: 蔡赛军; 李晓鸿; 王海波; 王国建
Original assignee: Ruimai Technology Co ltd
Current assignee: Ruimai Technology Co ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-05-17
Anticipated expiration: 2033-09-11

Abstract

The utility model provides an integrated telescopic seat frame and a seat, wherein the integrated telescopic seat frame comprises: the base is provided with a front end and a rear end which are positioned in the telescopic direction of the telescopic seat frame; the adjusting frame is movably assembled on the base; the driving piece drives the adjusting frame to reciprocate between the front end and the rear end so as to enable the telescopic seat frame to be switched between an extending state and a containing state; the extension mechanism is adjustably arranged between the base and the adjusting frame and comprises a limiting connecting rod, a backrest fixing rod and an extension plate group which are sequentially hinged, wherein the limiting connecting rod is hinged to the base, and the extension plate group is hinged to the adjusting frame; when the telescopic seat frame is in an extending state from a storage state, the adjusting frame moves towards the front end, and the extension plate group pulls the backrest fixing rod and the limit connecting rod to turn towards the front end. The seat frame is stable in structure and convenient to adjust in posture, and can provide larger seat depth for the seat assembled with the integrated telescopic seat frame in an extending state.

Description

Integrated telescopic seat frame and seat

Technical Field

The utility model relates to the technical field of furniture, in particular to an integrated telescopic seat frame and a seat.

Background

The functional seat can be subjected to posture adjustment, so that different structural states can be presented under different postures to meet the use requirement of consumers. Common functional chairs generally have a sitting posture and a lying posture, in which the chair functions as a bed. In practice, to control the volume of the seat, leg extension structures are often employed to extend the length of the seat, with the leg extension structures being received rearwardly and downwardly to the underside of the seat frame when the seat is in a sitting position and forwardly and upwardly to the front side of the seat frame when the seat is in a lying position. However, the leg extension structure has limited effect on the extension of the seat length, and the leg extension structure with a large length is inconvenient to store and has poor structural stability in the extended state, so that the functional seat using the conventional leg extension structure cannot provide a real bed experience for consumers in the lying posture, and there is room for improvement.

Disclosure of utility model

In view of the shortcomings of the prior art, a first object of the present utility model is to provide an integrated telescopic seat frame, which has a stable structure and convenient posture adjustment, and can provide a larger seat depth for a seat assembled with the integrated telescopic seat frame in an extended state.

A second object of the present utility model is to provide a seat which is adjustable and which, in the extended condition, has a large seat depth, which can be converted from a seat to a bed in the true sense.

The embodiment of the utility model is realized by the following technical scheme:

An integrated telescoping seatpost comprising: the base is provided with a front end and a rear end which are positioned in the telescopic direction of the telescopic seat frame; an adjusting frame movably assembled to the base; the driving piece drives the adjusting frame to reciprocate between the front end and the rear end so as to enable the telescopic seat frame to be switched between an extending state and a containing state; the extension mechanism is adjustably arranged between the base and the adjusting frame and comprises a limiting connecting rod, a backrest fixing rod and an extension plate group which are sequentially hinged, wherein the limiting connecting rod is hinged to the base, and the extension plate group is hinged to the adjusting frame; when the telescopic seat frame is in the extending state from the storage state, the adjusting frame moves towards the front end, and the extension plate group pulls the backrest fixing rod and the limiting connecting rod to turn towards the front end.

According to a preferred embodiment, a hinge point between the backrest fixing rod and the limit connecting rod is defined as a first hinge point, a hinge point between the backrest fixing rod and the extension plate group is defined as a second hinge point, and a hinge point between the extension plate group and the adjusting frame is defined as a third hinge point; when the telescopic seat frame is in the stretching state, an included angle between a connecting line between the first hinge point and the second hinge point and a connecting line between the second hinge point and the third hinge point is 150-180 degrees.

According to a preferred embodiment, the extension panel set comprises at least one traction extension panel, one end of which is hinged to the backrest fixation rod and the other end of which is hinged to the adjustment frame.

According to a preferred embodiment, the adjusting frame is slidingly connected with the base.

According to a preferred embodiment, the base comprises a front beam, a middle beam and a sliding rail, wherein the sliding rail spans the front beam and the middle beam and is fixedly connected with the front beam and the middle beam respectively, and the extending direction of the sliding rail is parallel to the extending direction of the telescopic seat frame; the adjusting frame is in sliding connection with the sliding rail.

According to a preferred embodiment, the base further comprises a rear beam at the rear end, the front beam at the front end, and the center beam between the front beam and the rear beam; the limit connecting rod is hinged to the middle beam or the sliding rail; when the telescopic seat frame is in the storage state, the limit connecting rod extends towards the rear beam, and the backrest fixing rod and the extension plate group are positioned in an area between the middle beam and the rear beam.

According to a preferred embodiment, the base further comprises a longitudinal beam, and the front beam, the middle beam and the rear beam are fixedly connected to the longitudinal beam.

According to a preferred embodiment, the centre sill is provided with a fixing plate, and the limit link is hinged to the fixing plate.

According to a preferred embodiment, the longitudinal beams are provided with handrail beams.

According to a preferred embodiment, the adjusting frame is provided with a support frame rod which extends in the telescopic direction of the telescopic seat frame, and the front end of the support frame rod is provided with rollers which are in rolling connection with the ground.

According to a preferred embodiment, the adjusting frame comprises a front seat frame support and a front fixed transmission member which are connected with each other, and the support frame rod is fixedly connected with the front seat frame support; the front fixed transmission piece is hinged with the extension plate group.

According to a preferred embodiment, the front fixed transmission member is L-shaped, one section of the front fixed transmission member being fixedly connected to the front seat frame support member and the other section being hinged to the extension plate group.

According to a preferred embodiment, the extension board set comprises a traction extension board, and a first limiting shaft is arranged on the traction extension board; when the telescopic seat frame is in a storage state, the first limiting shaft is abutted to the backrest fixing rod.

According to a preferred embodiment, the extension board set comprises a traction extension board, and the front fixed transmission member is provided with a second limiting shaft; when the telescopic seat frame is in an extending state, the traction extension plate is abutted to the second limiting shaft.

A seat comprises a seat cushion, an extension cushion, a backrest cushion and the integrated telescopic seat frame, wherein: the seat cushion is assembled on the adjusting frame, the extension cushion is assembled on the backrest fixing rod, and the backrest cushion is positioned on the upper sides of the seat cushion and the extension cushion; defining a space behind the lower side of the backrest cushion as a storage area; when the telescopic seat frame is in a storage state, the extension pad is positioned in the storage area, and at least part of the seat pad is positioned in the storage area; when the telescopic seat frame is in an extending state, the extension pad and the seat pad are separated from the storage area, and the working surface of the extension pad and the working surface of the seat pad are flush.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

The adjusting frame can drive the backrest fixing rod more stably through the extending plate group, and meanwhile, the height of the adjusting frame can be reduced through the extending plate group, so that the height of the backrest fixing rod can be increased, the telescopic seat frame, namely the seat, can be more in depth in an extending state, and the function of changing the seat into a bed can be realized; meanwhile, when the telescopic seat frame is in an extending state, the traction extension plate can be matched with the backrest fixing rod to provide longitudinal supporting force for the extension pad, so that the structural stability of the seat is effectively ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a telescopic seat frame according to an embodiment of the present utility model in a storage state;

fig. 2 is a schematic front view of a telescopic seat frame according to an embodiment of the present utility model in a storage state;

fig. 3 is a schematic perspective view of a telescopic seat frame according to an embodiment of the present utility model in an extended state;

Fig. 4 is a schematic front view of a telescopic seat frame according to an embodiment of the present utility model in an extended state;

fig. 5 is a schematic structural diagram of an adjusting frame and an extending mechanism when a telescopic seat frame provided in an embodiment of the present utility model is in a storage state;

Fig. 6 is a schematic structural diagram of an adjusting frame and an extending mechanism when a telescopic seat frame provided by an embodiment of the present utility model is in an extended state;

fig. 7 is a schematic structural view of a seat according to an embodiment of the present utility model in a storage state;

fig. 8 is a schematic structural view of a seat according to an embodiment of the present utility model in an extended state.

Icon: 1. a base; 11. a longitudinal beam; 111. a handrail beam; 12. a front beam; 13. a center sill; 131. a fixing plate; 14. a rear beam; 15. a backrest beam; 16. a slide rail; 161. a chute; 2. a driving member; 21. a fixing part; 22. an operation unit; 3. an adjusting frame; 31. a front seat frame support; 311. a slide block; 32. a front fixed transmission member; 321. the second limiting shaft; 33. a support frame rod; 331. a roller; 4. an extension mechanism; 41. a limit connecting rod; 411. the third limiting shaft; 42. a backrest fixing rod; 43. an extension board set; 431. traction extension board; 4311. a first limiting shaft; 4312. a limit groove; 5. a linkage beam; a. a first hinge point; b. a second hinge point; c. a third hinge point; i, a seat cushion; II, an extension pad; III, a backrest cushion; A. and a storage area.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 to 8, an integrated telescopic seat frame is applied to a seat. Specifically, the integral telescopic seat frame forms a main body frame of the seat, and the posture adjustment of the integral telescopic seat frame corresponds to the posture adjustment of the seat. For convenience of description, the integrated telescopic seat frame will be hereinafter referred to as a telescopic seat frame.

The flexible seat frame includes base 1, alignment jig 3, driving piece 2 and extending mechanism 4, wherein: the base 1 is provided with a front end and a rear end which are positioned in the telescopic direction of the telescopic seat frame; the adjusting frame 3 is movably assembled on the base 1; the driving piece 2 drives the adjusting frame 3 to reciprocate between the front end and the rear end so as to switch the telescopic seat frame between an extending state and a containing state; the extension mechanism 4 is adjustably arranged between the base 1 and the adjusting frame 3, the extension mechanism 4 comprises a limiting connecting rod 41, a backrest fixing rod 42 and an extension plate group 43 which are hinged in sequence, the limiting connecting rod 41 is hinged to the base 1, and the extension plate group 43 is hinged to the adjusting frame 3; when the telescopic seat frame is switched from the storage state to the extension state, the adjusting frame 3 moves toward the front end, and the extension plate group 43 pulls the backrest fixing rod 42 and the limit link 41 to turn toward the front end.

As shown in fig. 7 and 8, the cushion is assembled to the telescopic seat frame in a schematic structure. Specifically, the base 1 provides a longitudinal supporting force for the telescopic seat frame or the seat formed by the telescopic seat frame, the adjusting frame 3 is provided with a seat cushion I, and the backrest fixing rod 42 is provided with an extension cushion II; when the seat, i.e., the telescopic seat frame, is in the storage state, the backrest fixing rod 42, the extension pad ii and part of the seat pad i are stored behind the backrest pad iii; when the seat, namely the telescopic seat frame, is in an extending state, the adjusting frame 3 drives the seat cushion I to move forwards, and meanwhile, the backrest fixing rod 42 drives the extension cushion II to turn forwards, so that the length of the seat is lengthened. It should be noted that, the seat in the extended state has a seat depth increased or a length equal to the sum of the length of the extension pad ii and the length of the partial seat pad i located behind the backrest pad iii as compared with the seat in the retracted state, so that the seat length can be greatly increased to realize the function of a bed in the true sense when the seat is in the extended state.

In this embodiment, in order to improve structural stability, the adjusting frame 3 has a support frame rod 33, the support frame rod 33 is extended in the front and rear directions, that is, in the extending and contracting direction of the telescopic seat frame, and the front end of the support frame rod 33 is equipped with a roller 331 in rolling connection with the ground, and the seat cushion i is overlapped with the support frame rod 33.

In the present embodiment, the extension plate group 43 includes at least one traction extension plate 431, one end of the traction extension plate 431 is hinged to the backrest fixing rod 42, and the other end of the traction extension plate 431 is hinged to the adjustment frame 3. The adjusting bracket 3 can drive the backrest fixing bar 42 more stably by pulling the extending plate 431, and at the same time, the height of the adjusting bracket 3 can be lowered by pulling the extending plate 431 (if the adjusting bracket 3 is hinged directly to the backrest fixing bar 42, the height of the adjusting bracket 3 needs to be increased to achieve the purpose of saving labor if the connecting point with the backrest fixing bar 42 through the pulling extending plate 431 is to be reached, and when the height of the adjusting bracket 3 is too high, there is a risk of interfering with the extension cushion ii, while in order to pursue a large length of the seat in an extended state, as shown in fig. 7, the height of the backrest fixing bar 42 is increased to be an optimal choice), which makes it possible to increase the height of the backrest fixing bar 42, which also means that the extension cushion ii having a longer length can be assembled in a proper range without affecting the structural stability of the seat, which is advantageous for the telescopic seat frame, that is, the seat in an extended state, to obtain a larger seat depth, and thus realize the transition of the seat to the bed function. Meanwhile, when the telescopic seat frame is in an extending state, the traction extension plate 431 can be matched with the backrest fixing rod 42 to provide longitudinal supporting force for the extension pad II, so that the structural stability of the seat is effectively ensured.

In this embodiment, the traction extension plate 431 is one. Specifically, as shown in fig. 3 and 4, a hinge point between the backrest fixing rod 42 and the limit link 41 is defined as a first hinge point a, a hinge point between the backrest fixing rod 42 and the extension plate group 43 is defined as a second hinge point b, and a hinge point between the extension plate group 43 and the adjusting frame 3 is defined as a third hinge point c; when the telescopic seat frame is in an extending state, an included angle between a connecting line between the first hinge point a and the second hinge point b and a connecting line between the second hinge point b and the third hinge point c is alpha, and alpha=150-180 degrees. Preferably, α=170° -180 °. In this way, the traction extension plate 431 can be made to more cooperate with the backrest fixation rod 42 to provide support for the extension pad ii.

In other embodiments, the traction extension plate 431 may be two or three, with two or three traction extension plates 431 hinged in sequence.

As shown in fig. 1 and 2, the adjusting bracket 3 includes a front seat frame support 31 and a front fixed transmission member 32 connected to each other, and a support bar 33 is fixedly connected to the front seat frame support 31; the front fixed transmission 32 is hinged with the extension plate group 43. Further, the front fixed transmission member 32 is L-shaped, one section of the front fixed transmission member 32 is fixedly connected to the front seat frame supporting member 31, the other section is hinged to the extension board set 43, and the hinge point between the two sections is a third hinge point c. As shown in fig. 7, the front fixed transmission member 32 having an L shape can avoid excessive interference with the seat cushion i, which is advantageous in that the seat cushion i can be more attached to the front fixed transmission member 32 in a backward direction, thereby being advantageous in reducing a gap between the seat cushion i and the extension cushion ii when in an extended state, and effectively improving comfort of the seat.

In the present embodiment, the traction extension plate 431 is provided with a first limiting shaft 4311, and the first limiting shaft 4311 is located between the second hinge point b and the third hinge point c; when the telescopic seat frame is in the storage state, the first limiting shaft 4311 abuts against the backrest fixing rod 42. The first limiting shaft 4311 is matched with the backrest fixing rod 42 to limit the traction extension plate 431, so that the auxiliary driving piece 2 limits the adjusting frame 3, and the telescopic seat frame is stable in a storage state.

As shown in fig. 3 and 4, the front fixed transmission member 32 is provided with a second limiting shaft 321, and when the telescopic seat frame is in an extended state, the traction extension plate 431 abuts against the second limiting shaft 321. Preferably, the traction extension plate 431 is provided with a limiting groove 4312 corresponding to the second limiting shaft 321, for accommodating the second limiting shaft 321. The second limiting shaft 321 is used for limiting and supporting the traction extension plate 431 so as to improve the structural strength of the extension mechanism 4 in the extension state of the telescopic seat frame and prevent the extension pad II from collapsing.

In this embodiment, the adjusting frame 3 is slidably connected to the base 1. As shown in fig. 1, the base 1 includes a front beam 12, a middle beam 13 and a sliding rail 16, the sliding rail 16 spans the front beam 12 and the middle beam 13 and is fixedly connected with the front beam 12 and the middle beam 13 respectively, and the extending direction of the sliding rail 16 is parallel to the extending direction of the telescopic seat frame, namely, the front and rear directions; the adjusting frame 3 is connected with the sliding rail 16 in a sliding way. Specifically, the slide rail 16 is provided with a slide groove 161, and the bottom of the front seat frame support 31 is equipped with a slider 311 that is fitted to the slide groove 161. Optionally, the chute 161 is a T-shaped chute.

Alternatively, the driving member 2 is a linear actuator, the fixed portion 21 of the driving member 2 is fitted to the center sill 13, and the actuating portion 22 is connected to the adjustment bracket 3. In order to improve the structural strength and stability of the telescopic seat frame, the telescopic seat frame comprises two sliding rails 16 which are arranged in parallel, a middle beam 13 and a front beam 12 are mutually parallel, a driving piece 2 is positioned between the two sliding rails 16, correspondingly, two adjusting frames 3 are arranged in one-to-one correspondence with the two sliding rails 16, and the two adjusting frames 3 are linked through a linkage beam 5. In use, the fixed part 21 of the driving member 2 is assembled to the center sill 13, and the actuating part 22 is connected to the linkage beam 5 to synchronously drive the two adjusting brackets 3 to reciprocate in the front-rear direction relative to the slide rail 16.

The base 1 further comprises a rear beam 14, the rear beam 14 is positioned at the rear end, the front beam 12 is positioned at the front end, and the middle beam 13 is positioned between the front beam 12 and the rear beam 14; the limit link 41 is hinged to the centre sill 13 or the slide rail 16; when the telescoping seatpost is in a stowed state, the check link 41 extends toward the rear rail 14 with the back rest securing lever 42 and the extension panel set 43 in the region between the center rail 13 and the rear rail 14. As shown in fig. 7 and 8, the area between the center sill 13 and the rear sill 14 belongs to the back inner area of the seat for receiving the extension pad ii and part of the seat pad i in the received state to restore the depth of seat when the seat is in a normal sitting posture.

Specifically, the base 1 further includes a longitudinal beam 11, and the front beam 12, the center beam 13, and the rear beam 14 are fixedly connected to the longitudinal beam 11. The number of stringers 11 is two at the ends of the front beam 12, center beam 13 and rear beam 14 in the direction of extension to form a structurally stable square frame base 1.

In the present embodiment, the side member 11 is provided with an armrest beam 111. The armrest beam 111 and the longitudinal beam 11 are matched with the front beam 12, the middle beam 13 and the rear beam 14 to realize the integrated structural design of the telescopic seat frame, so that the telescopic seat frame has better structural stability and is convenient to assemble. In use, the armrest beams 111 and stringers 11 cooperate with side panels (not shown) for mounting a seat to laterally shield the seat frame interior structure.

The center sill 13 is provided with a fixed plate 131 and the check link 41 is hinged to the fixed plate 131. Further, a third limiting shaft 411 is disposed on the limiting link 41, and when the telescopic seat frame is in the storage state, the third limiting shaft 411 abuts against the fixing plate 131. The third limiting shaft 411 is matched with the first limiting shaft 4311 to limit the limiting connecting rod 41 to limit the traction extending plate 431 to assist the driving piece 2 to stabilize the position of the adjusting frame 3, so that the telescopic seat frame is ensured to be in a stable storage state. The check link 41 cooperates with the front fixed drive 32 to provide support for the back rest bar 42 and the traction extension plate 431 in an extended state.

The base 1 further comprises a back rest beam 15 arranged close to the back rest beam 14, and a back rest pad iii is mounted to the back rest beam 15.

As shown in fig. 7 and 8, the present embodiment further provides a seat, which includes the aforementioned seat cushion i, an extension cushion ii, a backrest cushion iii, and a telescopic seat frame, wherein the seat cushion i is assembled to the adjusting frame 3, the extension cushion ii is assembled to the backrest fixing rod 42, and the backrest cushion iii is disposed on the upper sides of the seat cushion i and the extension cushion ii; defining a space behind the lower side of the backrest cushion III as a storage area A; when the telescopic seat frame is in a storage state, the extension pad II is positioned in a storage area A with at least part of the seat pad I; when the telescopic seat frame is in the stretching state, the extension pad II and the seat pad I are separated from the storage area A, and the working surface of the extension pad II is flush with the working surface of the seat pad I. As shown in fig. 8, the working surface of the extension pad ii is the upper surface thereof, and the working surface of the seat pad i is the upper surface thereof. The seat can realize the switching of the stretching state and the storage posture, when the seat is in the storage posture, the seat is a conventional seat function, and when the seat is in the stretching state, the seat depth of the seat is greatly increased by the aid of the extension pad II matched with the seat pad I, and the working face of the extension pad II is flush with the working face of the seat pad I, so that the seat has a function of being used as a bed in a real sense.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. An integral telescopic seat frame, comprising:

a base (1) having a front end and a rear end in the telescoping direction of the telescoping frame;

An adjusting frame (3) movably assembled to the base (1);

A driving part (2) for driving the adjusting frame (3) to reciprocate between the front end and the rear end so as to switch the telescopic seat frame between an extending state and a containing state;

The extension mechanism (4) is adjustably arranged between the base (1) and the adjusting frame (3), and the extension mechanism (4) comprises a limiting connecting rod (41), a backrest fixing rod (42) and an extension plate group (43) which are hinged in sequence, wherein the limiting connecting rod (41) is hinged to the base (1), and the extension plate group (43) is hinged to the adjusting frame (3);

When the telescopic seat frame is in the extending state from the accommodating state, the adjusting frame (3) moves towards the front end, and the extension plate group (43) pulls the backrest fixing rod (42) and the limit connecting rod (41) to turn towards the front end.

2. The integrated telescopic seat frame according to claim 1, wherein a hinge point between the backrest fixing rod (42) and the limit link (41) is defined as a first hinge point (a), a hinge point between the backrest fixing rod (42) and the extension plate group (43) is defined as a second hinge point (b), and a hinge point between the extension plate group (43) and the adjusting frame (3) is defined as a third hinge point (c);

when the telescopic seat frame is in the stretching state, an included angle between a connecting line between the first hinge point (a) and the second hinge point (b) and a connecting line between the second hinge point (b) and the third hinge point (c) is 150-180 degrees.

3. The integrated telescopic seat frame according to claim 1, wherein the extension plate group (43) comprises at least one traction extension plate (431), one end of the traction extension plate (431) is hinged to the backrest fixation rod (42), and the other end of the traction extension plate (431) is hinged to the adjustment frame (3).

4. The integrated telescopic seat frame according to claim 1, wherein the adjusting frame (3) is slidingly connected with the base (1).

5. The integrated telescopic seat frame according to claim 4, wherein the base (1) comprises a front beam (12), a middle beam (13) and a sliding rail (16), the sliding rail (16) spans the front beam (12) and the middle beam (13) and is fixedly connected with the front beam (12) and the middle beam (13) respectively, and the extending direction of the sliding rail (16) is parallel to the telescopic direction of the telescopic seat frame;

The adjusting frame (3) is in sliding connection with the sliding rail (16).

6. The integrated telescopic seat frame according to claim 5, wherein the base (1) further comprises a rear beam (14), the rear beam (14) being at the rear end, the front beam (12) being at the front end, the middle beam (13) being between the front beam (12) and the rear beam (14);

The limit connecting rod (41) is hinged to the middle beam (13) or the sliding rail (16);

when the telescopic seat frame is in the storage state, the limit connecting rod (41) extends towards the rear beam (14), and the backrest fixing rod (42) and the extension plate group (43) are located in the area between the middle beam (13) and the rear beam (14).

7. The integrated telescopic seat frame according to claim 6, wherein the base (1) further comprises a longitudinal beam (11), the front beam (12), the middle beam (13) and the rear beam (14) being fixedly connected to the longitudinal beam (11).

8. The integrated telescopic seat frame according to claim 7, wherein a fixed plate (131) is provided on the center sill (13), and the limit link (41) is hinged to the fixed plate (131).

9. The integrated telescopic seat frame according to claim 7, wherein the longitudinal beams (11) are provided with armrest beams (111).

10. The integrated telescopic seat frame according to claim 1, wherein the adjusting frame (3) is provided with a support frame rod (33), the support frame rod (33) is arranged in an extending manner in the telescopic seat frame extending direction, and the front end of the support frame rod (33) is provided with a roller (331) in rolling connection with the ground.

11. The integrated telescopic seat frame according to claim 10, wherein the adjusting frame (3) comprises a front seat frame support (31) and a front fixed transmission (32) connected to each other, the support frame rod (33) being fixedly connected to the front seat frame support (31);

The front fixed transmission piece (32) is hinged with the extension plate group (43).

12. The integrated telescopic frame according to claim 11, wherein the front fixed transmission (32) is L-shaped, one section of the front fixed transmission (32) is fixedly connected to the front frame support (31), and the other section is hinged to the extension plate group (43).

13. The integrated telescopic seat frame according to claim 1, wherein the extension plate set (43) comprises a traction extension plate (431), and the traction extension plate (431) is provided with a first limiting shaft (4311);

When the telescopic seat frame is in a storage state, the first limiting shaft (4311) is abutted to the backrest fixing rod (42).

14. The integrated telescopic seat frame according to claim 11, wherein the extension plate set (43) comprises a traction extension plate (431), and the front fixed transmission member (32) is provided with a second limiting shaft (321);

When the telescopic seat frame is in an extended state, the traction extension plate (431) is abutted to the second limiting shaft (321).

15. A seat comprising a seat cushion (i), an extension cushion (ii), a back cushion (iii) and an integrated telescopic seat frame according to any of claims 1-14, wherein:

The seat cushion (I) is assembled on the adjusting frame (3), the extension cushion (II) is assembled on the backrest fixing rod (42), and the backrest cushion (III) is positioned on the upper sides of the seat cushion (I) and the extension cushion (II);

Defining a space behind the lower side of the backrest cushion (III) as a storage area (A);

When the telescopic seat frame is in a storage state, the extension pad (II) is positioned in the storage area (A) and at least part of the seat pad (I) is positioned in the storage area (A);

When the telescopic seat frame is in an extended state, the extension pad (II) and the seat pad (I) are separated from the storage area (A), and the working surface of the extension pad (II) and the working surface of the seat pad (I) are flush.