CN218605830U

CN218605830U - Extension type sofa

Info

Publication number: CN218605830U
Application number: CN202222970108.6U
Authority: CN
Inventors: 王炳坤
Original assignee: Dongguan Aimu Bedroom Supplies Co Ltd
Current assignee: Dongguan Aimu Bedroom Supplies Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-14
Anticipated expiration: 2032-11-08

Abstract

The utility model belongs to the technical field of furniture products, and discloses an extension sofa, which comprises a sofa body, a driving component, a telescopic cushion and supporting legs, wherein the bottom of the sofa body is provided with two U-shaped slide rails, and U-shaped chutes are arranged on the U-shaped slide rails; the driving assembly comprises a motor and a support frame, the motor and the telescopic cushion are both mounted on the support frame, the support frame is provided with a limiting rod inserted into one of the U-shaped sliding grooves and used for limiting the support frame to rotate in a vertical plane, a gear is mounted at the output end of the motor, a rack is arranged on the other U-shaped sliding rail, the gear is meshed with the rack, and the motor is used for driving the gear to run on the U-shaped sliding rail so as to drive the telescopic cushion to switch positions between an extending position and a retracting position; the supporting legs rotate and are installed at the bottom of the telescopic cushion, and when the telescopic cushion is switched to the stretching position, the supporting legs support the telescopic cushion. Through the utility model discloses can improve the convenience of extension and shrink, satisfy user's user demand.

Description

Extension type sofa

Technical Field

The utility model relates to a furniture product technical field especially relates to extension formula sofa.

Background

The sofa is common furniture product, sofa on the market can be divided into fixed sofa and regulation formula sofa, fixed sofa adopts the wood to make more, shape structure is fixed, weight is great, the transport of being not convenient for, the shape structure of regulation formula sofa can be adjusted according to actual need in real time, can reduce area in the less environment in space, multiplicable bearing area in the great environment in space, so that most guests can both sit on the sofa, therefore, the application of regulation formula sofa is more extensive, but present regulation formula sofa is the manual sofa that splices, need the manual sofa that splices of user, the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: the extensible sofa is provided, the convenience of extension and contraction is improved, and the use requirements of users are met.

To achieve the purpose, the utility model adopts the following technical proposal:

an extension sofa comprising:

the sofa comprises a sofa body, wherein one side of the sofa body is provided with an extended position, the bottom of the sofa body is provided with a contracted position, one side wall of the bottom of the sofa body is provided with two U-shaped slide rails in a staggered manner along the height direction, each U-shaped slide rail comprises a bent section and a horizontal section, the bent section is close to the extended position, the horizontal section is far away from the extended position, and the U-shaped slide rails are also provided with U-shaped slide grooves;

the driving assembly comprises a motor and a support frame, the motor and the telescopic cushion are both mounted on the support frame, the support frame is provided with a limiting rod inserted into one of the U-shaped sliding grooves, the limiting rod is used for limiting the support frame to rotate in a vertical plane, a gear is mounted at the output end of the motor, a rack is arranged on the other U-shaped sliding rail, the gear is meshed with the rack, and the motor is used for driving the gear to move on the U-shaped sliding rail so as to drive the telescopic cushion to switch positions between the stretching position and the contraction position;

the supporting legs are rotatably installed at the bottom of the telescopic cushion, and when the telescopic cushion is switched to the stretching position, the supporting legs support the telescopic cushion.

As an optional technical solution, the U-shaped slide rail includes two sections of the horizontal section, one section of the horizontal section is connected to the upper end of the bending section, the other section of the horizontal section is connected to the lower end of the bending section, and in the same U-shaped slide rail, the length of the horizontal section located above is smaller than the length of the horizontal section located below.

As an optional technical solution, the U-shaped slide rail provided with the rack is a first slide rail, the U-shaped slide rail inserted with the limiting rod is a second slide rail, the horizontal height of the horizontal section above the first slide rail is higher than the horizontal height of the horizontal section below the second slide rail, and the horizontal height of the horizontal section above the first slide rail is lower than the horizontal height of the horizontal section above the second slide rail.

As an optional technical solution, the first slide rail is provided with two, the second slide rail is provided with two, one of the first slide rail and one of the second slide rail are disposed on a side wall of the bottom of the sofa body, the other of the first slide rail and the other of the second slide rail is disposed on the other opposite side wall of the bottom of the sofa body, the driving assemblies are provided in two sets, one set of the driving assemblies is in fit connection with the first slide rail and the second slide rail which are located on one side wall of the bottom of the sofa body, and the other set of the driving assemblies is in fit connection with the first slide rail and the second slide rail which are located on the other opposite side wall of the bottom of the sofa body.

As an optional technical scheme, the extension sofa further comprises a telescopic backrest, the sofa body comprises a backrest body and a cushion body, the cushion body is fixedly arranged on one side of the backrest body, an avoiding cavity is formed in the backrest body, the telescopic backrest is movably arranged at one end, close to the extension position, of the backrest body along the length direction, and the telescopic backrest can retract to avoid the contraction state of the cavity and stretch out to switch between the extension states of the cavity.

As an optional technical scheme, the inner wall of the avoiding cavity is provided with a U-shaped guide groove, the telescopic backrest stretches into one end of the avoiding cavity corresponds to the position of the U-shaped guide groove and is provided with a pushing plate, the U-shaped guide groove and the rack are arranged on the U-shaped slide rail, the U-shaped slide groove corresponds to the pushing plate, the motor is provided with a push rod which sequentially penetrates through the U-shaped slide groove and the U-shaped guide groove and abuts against the pushing plate, and the push rod is used for pushing the pushing plate to move along the length direction.

As an optional technical solution, the upper surface of the pushing plate is provided with a first abutting portion and a second abutting portion at intervals along the length direction, the first abutting portion is located on one side of the second abutting portion close to the extending position, and the pushing rod is used for abutting the first abutting portion or the second abutting portion.

As an optional technical solution, the highest point of the second pushing part is lower than the horizontal height of the horizontal section of the U-shaped guide groove located above.

As an optional technical scheme, the inner wall of the avoiding cavity is provided with a guide plate, the outer wall of the backrest body is provided with a guide cylinder, and the guide plate and the guide cylinder are arranged in a sliding fit manner along the length direction.

As an optional technical solution, the retractable cushion and/or the retractable backrest are filled with sponge.

The beneficial effects of the utility model reside in that:

the utility model provides an extension sofa, this extension sofa includes the sofa body, drive assembly, flexible cushion and supporting legs, motor drive gear's walking route on U type slide rail is U type route, when the gear butt of installing in the output of motor on the upper strata of U type slide rail, flexible cushion is located the extension position, the user can take flexible cushion, when needs switch flexible cushion to the contraction position, the gear of installing in the output of motor walks around the bending section earlier, the movement track of flexible cushion is the arc this moment, flexible cushion keeps away from the sofa body earlier, when the gear of installing in the output of motor moved to the lower floor of U type slide rail, flexible cushion moved to the bottom of sofa body and finally moved to the contraction position, reduce the whole area who extends sofa; when the telescopic cushion located at the stretching position is switched to the contracting position, the motor drives the gear to walk on the rack, the motor, the gear, the support frame, the telescopic cushion and the support legs are all contracted and moved towards the bottom of the sofa body, at the moment, the support legs can rotate to lean against the telescopic cushion to avoid the support legs from being exposed and blocked, and because the two U-shaped slide rails are arranged along the height direction in a staggered mode, and the support frame is respectively abutted to the two U-shaped slide rails through the gear and the limiting rod, the rotation of the support frame in a vertical plane can be limited; when the extension type sofa is placed in a larger space environment, if more users need to sit down, the telescopic cushion located at the contraction position is switched to the extension position, the motor drives the gear to reversely walk on the rack at the moment, and the support frame drives the telescopic cushion to be away from the sofa body and then enables the telescopic cushion to be abutted against one side of the sofa body.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples;

FIG. 1 is a first perspective view of the extended sofa according to the exemplary embodiment;

FIG. 2 is a second perspective view of the extended sofa according to the exemplary embodiment;

FIG. 3 is a third perspective view of the extended sofa according to the exemplary embodiment;

FIG. 4 is a sectional view of the extended sofa according to the example;

FIG. 5 is an enlarged view of a portion of the portion A of FIG. 4;

fig. 6 is a schematic structural view of two U-shaped slide rails arranged along the height direction in a staggered manner according to the embodiment.

In the figure:

1. a sofa body; 11. a backrest body; 111. avoiding the cavity; 112. a U-shaped guide groove; 113. a guide plate; 12. a cushion body;

2. a U-shaped slide rail; 21. a curved section; 22. a horizontal segment; 23. a U-shaped chute; 24. a rack;

3. a drive assembly; 31. a motor; 32. a support frame; 33. a push rod;

4. a telescopic cushion;

5. supporting legs;

6. a telescopic backrest;

7. a push plate; 71. a first pushing part; 72. a second pushing part;

8. and a guide cylinder.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description herein, it is to be understood that the terms "upper", "lower", "left", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 6, the embodiment provides an extension sofa, which includes a sofa body 1, a driving assembly 3, a telescopic cushion 4 and supporting legs 5, wherein one side of the sofa body 1 is provided with an extension position, the bottom of the sofa body 1 is provided with a contraction position, one side wall of the bottom of the sofa body 1 is provided with two U-shaped slide rails 2 in a staggered manner along a height direction, each U-shaped slide rail 2 includes a bending section 21 and a horizontal section 22, the bending section 21 is close to the extension position, the horizontal section 22 is far away from the extension position, and the U-shaped slide rails 2 are further provided with U-shaped sliding grooves 23; the driving assembly 3 comprises a motor 31 and a support frame 32, the motor 31 and the telescopic cushion 4 are both mounted on the support frame 32, the support frame 32 is provided with a limiting rod inserted into one of the U-shaped sliding grooves 23, the limiting rod is used for limiting the support frame 32 to rotate in a vertical plane, a gear is mounted at the output end of the motor 31, a rack 24 is arranged on the other U-shaped sliding rail 2, the gear is meshed with the rack 24, and the motor 31 is used for driving the gear to walk on the U-shaped sliding rail 2 to drive the telescopic cushion 4 to switch positions between an extending position and a retracting position; the supporting legs 5 are rotatably installed at the bottom of the telescopic cushion 4, and when the telescopic cushion 4 is switched to the extension position, the supporting legs 5 support the telescopic cushion 4.

Specifically, the motor 31 drives the gear to travel on the U-shaped slide rail 2 in a U-shaped path, when the gear mounted at the output end of the motor 31 abuts against the upper layer of the U-shaped slide rail 2, the retractable cushion 4 is located at the extended position, a user can sit on the retractable cushion 4, when the retractable cushion 4 needs to be switched to the retracted position, the gear mounted at the output end of the motor 31 firstly bypasses the bending section 21, the motion track of the retractable cushion 4 is arc-shaped, the retractable cushion 4 firstly leaves away from the sofa body 1, and when the gear mounted at the output end of the motor 31 moves to the lower layer of the U-shaped slide rail 2, the retractable cushion 4 moves to the bottom of the sofa body 1 and finally moves to the retracted position, so that the overall floor area of the extended sofa is reduced; when the telescopic cushion 4 located at the stretching position is switched to the contracting position, the motor 31 drives the gear to walk on the rack 24, the motor 31, the gear, the support frame 32, the telescopic cushion 4 and the support foot 5 all contract and move towards the bottom of the sofa body 1, at the moment, the support foot 5 can rotate and lean against the telescopic cushion 4, the support foot 5 is prevented from being exposed and blocked, and the support frame 32 can limit the rotation of the support frame 32 in a vertical plane due to the staggered arrangement of the two U-shaped slide rails 2 along the height direction and the support frame 32 is respectively abutted against the two U-shaped slide rails 2 through the gear and the limiting rod; when the extension type sofa is placed in a larger space environment, if more users need to sit down, the telescopic cushion 4 located at the contraction position is switched to the extension position, the motor 31 drives the gear to reversely walk on the rack 24, and the support frame 32 drives the telescopic cushion 4 to be away from the sofa body 1 and then enables the telescopic cushion 4 to abut against one side of the sofa body 1.

The gear of this embodiment is the straight-teeth gear, and the gag lever post is the round bar, and the structure of gear and the structure of gag lever post are current structure, and gear and gag lever post do not all show in the drawing.

In this embodiment, the U-shaped sliding rail 2 includes two horizontal sections 22, wherein one horizontal section 22 is connected to the upper end of the curved section 21, and the other horizontal section 22 is connected to the lower end of the curved section 21, and in the same U-shaped sliding rail 2, the length of the horizontal section 22 located above is smaller than the length of the horizontal section 22 located below. When the gear is meshed with the rack 24 of the horizontal section 22 positioned above, the telescopic cushion 4 and the cushion body 12 are positioned on the same plane, and when the gear moves to the tail end of the horizontal section 22, the telescopic cushion 4 is abutted against the cushion body 12, so that a gap is sealed; since the length of the upper horizontal segment 22 is smaller than the length of the lower horizontal segment 22, that is, when the gear moves to the end of the lower horizontal segment 22, the retractable cushion 4 can be completely received in the bottom of the cushion body 12.

In this embodiment, the U-shaped slide rail 2 provided with the rack 24 is a first slide rail, the U-shaped slide rail 2 provided with the stop lever as an inserted second slide rail, the horizontal height of the horizontal section 22 located above in the first slide rail is higher than the horizontal height of the horizontal section 22 located below in the second slide rail, and the horizontal height of the horizontal section 22 located above in the first slide rail is lower than the horizontal height of the horizontal section 22 located above in the second slide rail, so that the first slide rail and the second slide rail can be ensured to jointly stably support the support frame 32, and the support frame 32 is prevented from rotating in a vertical plane after the support legs 5 are accommodated.

Optionally, the first slide rail is provided with two, the second slide rail is provided with two, one of the first slide rail and one of the second slide rail are arranged on one side wall of the bottom of the sofa body 1, the other one of the first slide rail and the other one of the second slide rail are arranged on the other opposite side wall of the bottom of the sofa body 1, the driving assemblies 3 are arranged into two groups, one group of driving assemblies 3 is connected with the first slide rail and the second slide rail which are located on one side wall of the bottom of the sofa body 1 in a matched manner, and the other group of driving assemblies 3 is connected with the first slide rail and the second slide rail which are located on the other opposite side wall of the bottom of the sofa body 1 in a matched manner. Four U-shaped slide rails 2 and two support frames 32 are provided, so that the support stability of the telescopic cushion 4 is improved.

Optionally, the extensible sofa further comprises a retractable backrest 6, the sofa body 1 comprises a backrest body 11 and a cushion body 12, the cushion body 12 is fixedly arranged on one side of the backrest body 11, an avoiding cavity 111 is formed in the backrest body 11, the retractable backrest 6 is movably arranged at one end, close to the extension position, of the backrest body 11 in the length direction, and the retractable backrest 6 can be switched between a retracted state where the retractable backrest is retracted to the avoiding cavity 111 and an extended state where the retractable backrest is extended to the avoiding cavity 111.

When a user sits on the telescopic seat cushion 4, the telescopic backrest 6 can extend out of the avoiding cavity 111, and the user can lean on the telescopic backrest 6 to meet the use requirements of the user; when the extended sofa is in a narrow space environment, the telescopic backrest 6 can be retracted into the avoiding cavity 111, so that the overall floor area of the extended sofa is reduced.

Optionally, the telescopic seat cushion 4 and/or the telescopic backrest 6 are filled with sponge. Specifically, flexible cushion 4 and flexible back 6 all fill and are provided with the sponge, and when flexible cushion 4 was located to extend the position and flexible back 6 stretches out from dodging cavity 111, the expansion function of usable sponge will stretch out and draw back the gap between cushion 4 and the flexible back 6 and seal, satisfy user's user demand.

Optionally, a U-shaped guide groove 112 is formed in the inner wall of the avoidance cavity 111, a push plate 7,U-shaped guide groove 112 is arranged at a position, corresponding to the U-shaped guide groove 112, of one end, extending into the avoidance cavity 111, of the telescopic backrest 6, and the U-shaped slide groove 23 of the U-shaped slide rail 2 provided with the rack 24 is arranged correspondingly, the motor 31 is provided with a push rod 33 which sequentially penetrates through the U-shaped slide groove 23 and the U-shaped guide groove 112 and abuts against the push plate 7, and the push rod 33 is used for pushing the push plate 7 to move along the length direction.

Specifically, the upper surface of the pushing plate 7 is provided with a first abutting portion 71 and a second abutting portion 72 at intervals along the length direction, the first abutting portion 71 is located on one side of the second abutting portion 72 close to the extending position, and the pushing rod 33 is used for abutting against the first abutting portion 71 or the second abutting portion 72.

When the telescopic cushion 4 in the contraction position moves to the expansion position, the push rod 33 moves from the horizontal section 22 located below to the bending section 21 along with the motor 31, at this time, the push rod 33 abuts against the first abutting part 71, the first abutting part 71 pushes the telescopic backrest 6 out of the avoidance cavity 111, and when the push rod 33 moves to the bending section 21, the push rod 33 is separated from the first abutting part 71; when the telescopic seat cushion 4 in the extended position moves to the retracted position, the push rod 33 moves from the horizontal section 22 located above to the bending section 21 along with the motor 31, at this time, the push rod 33 abuts against the second abutting part 72, and the push rod 33 pushes the telescopic backrest 6 back to the avoidance cavity 111.

Optionally, the highest point of the second abutting portion 72 is lower than the level of the upper horizontal segment 22 of the U-shaped guiding slot 112.

Optionally, the inner wall of the avoidance cavity 111 is provided with a guide plate 113, the outer wall of the backrest body 11 is provided with a guide cylinder 8, and the guide plate 113 and the guide cylinder 8 are arranged in a sliding fit manner along the length direction, so that the smoothness of movement of the telescopic backrest 6 along the length direction is improved.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. An extension sofa, comprising:

the sofa comprises a sofa body (1), wherein one side of the sofa body (1) is provided with an extending position, the bottom of the sofa body (1) is provided with a contracting position, one side wall of the bottom of the sofa body (1) is provided with two U-shaped slide rails (2) in a staggered manner along the height direction, each U-shaped slide rail (2) comprises a bending section (21) and a horizontal section (22), the bending section (21) is close to the extending position, the horizontal section (22) is far away from the extending position, and the U-shaped slide rails (2) are also provided with U-shaped slide grooves (23);

the driving assembly (3) comprises a motor (31) and a supporting frame (32), the motor (31) and the telescopic cushion (4) are both mounted on the supporting frame (32), the supporting frame (32) is provided with a limiting rod inserted into one of the U-shaped sliding grooves (23), the limiting rod is used for limiting the rotation of the supporting frame (32) in a vertical plane, a gear is mounted at the output end of the motor (31), a rack (24) is arranged on the other U-shaped sliding rail (2), the gear is meshed with the rack (24), and the motor (31) is used for driving the gear to move on the U-shaped sliding rail (2) to drive the telescopic cushion (4) to switch positions between the stretching position and the retracting position;

supporting legs (5), rotate install in the bottom of flexible cushion (4), flexible cushion (4) switch to when extending the position, supporting legs (5) support flexible cushion (4).

2. The extended sofa of claim 1, wherein the U-shaped sliding track (2) comprises two horizontal segments (22), one of the horizontal segments (22) being connected to the upper end of the curved segment (21) and the other horizontal segment (22) being connected to the lower end of the curved segment (21), the horizontal segment (22) above having a smaller length than the horizontal segment (22) below in the same U-shaped sliding track (2).

3. The extended sofa of claim 1, wherein the U-shaped sliding track (2) provided with the rack (24) is a first sliding track, the U-shaped sliding track (2) with the stop bar inserted is a second sliding track, the horizontal level of the upper horizontal segment (22) of the first sliding track is higher than the horizontal level of the lower horizontal segment (22) of the second sliding track, and the horizontal level of the upper horizontal segment (22) of the first sliding track is lower than the horizontal level of the upper horizontal segment (22) of the second sliding track.

4. The extension sofa of claim 3, wherein the first sliding track is provided with two tracks, the second sliding track is provided with two tracks, one of the first sliding track and the second sliding track is provided on one side wall of the bottom of the sofa body (1), the other of the first sliding track and the second sliding track is provided on the other opposite side wall of the bottom of the sofa body (1), and the driving assemblies (3) are provided in two sets, wherein one set of the driving assemblies (3) is cooperatively connected with the first sliding track and the second sliding track on one side wall of the bottom of the sofa body (1), and the other set of the driving assemblies (3) is cooperatively connected with the first sliding track and the second sliding track on the other opposite side wall of the bottom of the sofa body (1).

5. The extension sofa of claim 1, further comprising a telescopic backrest (6), wherein the sofa body (1) comprises a backrest body (11) and a cushion body (12), the cushion body (12) is fixedly arranged on one side of the backrest body (11), an avoiding cavity (111) is formed in the backrest body (11), the telescopic backrest (6) is movably arranged at one end, close to the extension position, of the backrest body (11) along the length direction, and the telescopic backrest (6) can be switched between a retracted state for retracting the avoiding cavity (111) and an extended state for extending the avoiding cavity (111).

6. The extension sofa according to claim 5, wherein a U-shaped guide groove (112) is formed in the inner wall of the avoiding cavity (111), a push plate (7) is arranged at a position, corresponding to the U-shaped guide groove (112), of one end, extending into the avoiding cavity (111), of the telescopic backrest (6), the U-shaped guide groove (112) is arranged corresponding to the U-shaped slide groove (23) of the U-shaped slide rail (2) provided with the rack (24), the motor (31) is provided with a push rod (33) which sequentially penetrates through the U-shaped slide groove (23) and the U-shaped guide groove (112) and abuts against the push plate (7), and the push rod (33) is used for pushing the push plate (7) to move along the length direction.

7. The extension sofa of claim 6, wherein the upper surface of the push plate (7) is provided with a first abutting portion (71) and a second abutting portion (72) at intervals along the length direction, the first abutting portion (71) is located on one side of the second abutting portion (72) close to the extension position, and the push rod (33) is used for abutting against the first abutting portion (71) or the second abutting portion (72).

8. The extension sofa of claim 7, wherein the highest point of the second pushing portion (72) is lower than the level of the upper horizontal segment of the U-shaped guiding groove (112).

9. The extended sofa of claim 7, wherein the inner wall of the avoiding cavity (111) is provided with a guide plate (113), the outer wall of the backrest body (11) is provided with a guide cylinder (8), and the guide plate (113) and the guide cylinder (8) are arranged in a sliding fit manner along the length direction.

10. The extended sofa according to claim 5, characterised in that the telescopic seat cushion (4) and/or the telescopic backrest (6) are filled with sponge.