CN215874079U - Sofa with vertically-turnable headrest and extendable and retractable leg-supporting seat - Google Patents

Abstract

The utility model discloses a sofa with a vertically-turnable headrest and a stretchable and retractable leg-supporting seat, which comprises a sofa body, wherein the sofa body comprises a backrest component; the headrest overturning device comprises a backrest and a headrest, a vertical overturning device used for enabling the headrest to vertically overturn is arranged in the backrest, the vertical overturning device comprises a first support assembly fixedly arranged in the backrest, the first support assembly is provided with a first motor, a sliding chute is fixedly arranged on the first motor, a first extension rod driven by the first motor to reciprocate up and down is arranged in the sliding chute, the first extension rod is fixedly connected with a sliding block and drives the sliding block to slide up and down along the sliding chute, the sliding block is hinged with an overturning assembly, and the overturning assembly drives the headrest arranged on the overturning assembly to vertically overturn; the headrest automatic control device can automatically control the headrest to be vertically unfolded for work and can be folded down for folding; meanwhile, the leg supporting seat can be extended forwards and rolled inwards, and the operation is convenient.

Description

Sofa with vertically-turnable headrest and extendable and retractable leg-supporting seat

Technical Field

The utility model relates to the technical field of sofas, in particular to a sofa with a vertically-turnable headrest and a stretchable and retractable leg-supporting seat.

Background

The sofa is an essential daily article in people's life, and different from ordinary seat, the structure of sofa is more soft, and is sat, is lain, crouches and all is very comfortable.

As the modern life rhythm is faster and faster, the life pressure is higher and higher, office workers, especially common white-collar workers, generally cannot have sufficient rest, and the office workers are facilitated to have a rest on a sofa in a scattered time to become a good medicine for dispensing life.

However, different people have different preferences, some people want the head to be leaned and gentle, and some people want to add the headrest to better support the head and the neck, so whether the headrest is arranged or not becomes a difficult problem for sofa manufacturers; meanwhile, the seat part can not support legs, the body can not be tightly attached to the sofa, and the sofa can be used as a deck chair.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides the sofa with the vertically-turnable headrest and the extendable and retractable leg-supporting seat, which can automatically control the vertical unfolding work of the headrest, can be folded down and retracted, and can better support the head and the neck; meanwhile, the leg supporting seat can be extended forwards and rolled inwards to support legs, and the operation is convenient.

In order to achieve the above objects, the present invention provides a sofa with a vertically tiltable headrest and an extendable and retractable leg-supporting seat, comprising a sofa body including a backrest assembly for supporting a back; the utility model discloses a headrest, including back, motor, back subassembly, motor, back subassembly includes the back and installs the headrest in the back top, the inside vertical turning device who is used for making the vertical upset of headrest that has installed of back subassembly, vertical turning device is including fixed the first support subassembly of installing in the back inside, first motor has been installed to first support subassembly, the fixed spout of having installed on the first motor, the inside first nose bar of reciprocating motion about installing by a motor drive of spout, first nose bar slides from top to bottom along the spout with slider fixed connection and drive slider, slider hinged joint has the upset subassembly, the upset subassembly drives the vertical upset of headrest installed on the upset subassembly.

Preferably, the first bracket assembly comprises a bottom supporting rod which is transversely arranged and hinged with the first motor and vertical supporting rods which are arranged at two sides of the bottom supporting rod; the bottom support rod and the vertical support rod are fixedly connected through rivets; the middle part of the bottom supporting rod is hinged with the first motor through a pin.

Preferably, the flipping unit includes: the turning support rod is hinged with the sliding block, and the L-shaped connecting rod and the linear connecting rod are hinged on the vertical support rod; the slide block drives the turnover support rod to rotate; the linear connecting rod is fixedly connected with the overturning supporting rod and rotates along with the overturning supporting rod; one end of the L-shaped connecting rod is further hinged with a first bent connecting rod, one end of the linear connecting rod is further hinged with a second bent connecting rod, and the middle part of the first bent connecting rod is connected with the linear connecting rod through a hinge; the first bending connecting rod and the second bending connecting rod are connected with a turnover block through hinges, and a headrest is fixedly arranged on the turnover block.

Preferably, the sofa body further comprises a seat assembly mounted at a lower portion of the backrest assembly; the seat assembly comprises a horizontal seat and a leg supporting seat connected with the end part of the horizontal seat and used for supporting legs, and an extending and rolling device used for enabling the leg supporting seat to extend forwards and roll is arranged in the seat assembly.

Preferably, the stretching and winding device comprises a second support arranged in the seat component, a second motor is arranged on the second support, a second extension bar driven by the second motor to reciprocate back and forth is arranged on the second motor, a first cross bar hinged with the second extension bar is arranged on the second extension bar, at least one stretching and winding component is arranged on the first cross bar, and a leg supporting seat is fixedly arranged on the stretching and winding component.

Preferably, the extension rolling component comprises a first connecting rod fixedly arranged on a first cross rod, a second connecting rod is hinged to one end of the inner side of the first connecting rod, a third connecting rod is hinged to the middle of the second connecting rod, a horizontal supporting rod is hinged to one end of the third connecting rod, a fourth connecting rod is hinged to the other end of the third connecting rod, a fifth connecting rod is hinged to the end portion of the second connecting rod, the middle of the fifth connecting rod is hinged to the fourth connecting rod, a sixth connecting rod is hinged to the end portion of the fifth connecting rod, a seventh connecting rod is hinged to the end portion of the fourth connecting rod, the middle of the seventh connecting rod is hinged to the sixth connecting rod, and the end portion of the seventh connecting rod is fixedly provided with a leg supporting seat.

Preferably, the sofa body is provided with a plurality of sofa bodies which are arranged side by side; the first armrest is arranged on one side of the sofa body, and the second armrest is arranged on the other side of the sofa body.

Preferably, the first handrail or the second handrail is provided with a control switch for controlling the vertical turnover device and the stretching and rolling device.

Compared with the prior art, the utility model has the beneficial effects that:

1. the backrest assembly is internally provided with a vertical turnover device for vertically turning over the headrest; the vertical turnover device is arranged, so that the vertical turnover and turnover angle of the headrest can be automatically controlled, the headrest can be automatically controlled to be vertically unfolded for work, and can be folded down for folding, and the head and the neck can be better supported; meanwhile, an extension and rolling device for enabling the leg supporting seat to extend forwards and roll inwards is arranged in the seat component; the leg support seat is provided with the stretching and rolling device to stretch forwards and roll inwards, so that the legs can be supported, the degree of automation is high, the operation is convenient, and the use requirements of users are met.

2. The first motor drives the sliding block to reciprocate up and down through the first extension rod; the headrest can be unfolded vertically and can be folded down and folded up, so that the head and the neck can be supported better; when the first motor rotates forwards, the sliding block moves upwards, so that the headrest hinged with the sliding block is driven to vertically turn over, and the headrest can be vertically unfolded to work; when the first motor rotates reversely, the sliding block moves downwards, so that the headrest hinged with the sliding block is driven to turn backwards and return to the original position, and the headrest can be folded down and retracted; can carry out manual regulation to the headrest, control is simple and convenient, is favorable to hugging closely and supporting the head, conveniently relaxs the head simultaneously.

3. According to the utility model, a second motor drives a first cross rod hinged with a second extension bar to rotate through the second extension bar, so that a stretching and winding component arranged on the first cross rod stretches or winds; so that the leg support seat arranged on the stretching and rolling component can be stretched forwards or rolled inwards; when the second motor rotates forwards, the second extension rod extends out to drive the leg support seat to extend forwards; when the second motor rotates reversely, the second extension bar is retracted to drive the leg support seat to be rolled inwards; the leg support seat can be manually adjusted, is simple and convenient to control, is beneficial to supporting legs, and is beneficial to a user to lie flat on the seat assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic front view of the present invention providing an initial state of the headrest and a forward extension of the leg support seat;

FIG. 2 is a schematic front view of the headrest as provided by the present invention flipped upright and the leg support seat extended forward;

FIG. 3 is a bottom view of the headrest as it is flipped upright and the leg support seat rolled inward as provided by the present invention;

FIG. 4 is a vertical flip sectional view of the headrest provided by the present invention;

FIG. 5 is a schematic view of the present invention providing a vertically inverted headrest;

FIG. 6 is a side schematic view of the headrest being flipped upright and the leg support seat extended forward as provided by the present invention;

FIG. 7 is a schematic view of the vertical turning device provided by the present invention in an initial state;

FIG. 8 is a schematic view of the vertical turning device of the present invention in a middle vertical turning state;

FIG. 9 is a schematic view of the vertical turning device according to the present invention in a maximum vertical turning state;

FIG. 10 is a schematic view of the present invention in an initial state of the stretching and winding apparatus;

fig. 11 is a schematic view of the stretching and rolling device provided by the present invention in a maximum state.

The figure includes:

2-sofa body, 4-backrest assembly, 41-backrest, 42-headrest, 5-vertical turnover device, 51-first bracket assembly, 81-first motor, 82-chute, 83-slider, 84-turnover assembly, 511-bottom support bar, 512-vertical support bar, 846-turnover support bar, 841-L type link, 842-linear link, 843-first bending link, 844-second bending link, 845-turnover block, 3-seat assembly, 31-horizontal seat, 32-leg support seat, 6-stretching and rolling device, 61-second bracket, 62-second motor, 63-second extension bar, 64-first cross bar, 65-stretching assembly, 71-first connecting bar, 72-second connecting rod, 73-third connecting rod, 74-fourth connecting rod, 75-fifth connecting rod, 76-sixth connecting rod, 77-seventh connecting rod, 11-first handrail, 12-second handrail, 9-control switch and 652-horizontal supporting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are one embodiment of the present invention, and not all embodiments of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 11, the present invention provides a sofa with a vertically-rotatable headrest and an extendable and retractable leg-supporting seat.

As shown in fig. 1, the sofa comprises a first armrest 11 and a second armrest 12, the first armrest 11 is installed on one side of the sofa, the second armrest 12 is installed on the other side of the sofa, and further, the first armrest 11 or the second armrest 12 is installed with a control switch 9 for controlling the vertical turnover device 5 and the stretching and rolling device 6; in the present embodiment, as shown in fig. 2, the control switch 9 is installed inside the second handrail 12; the control switch 9 is provided with a plurality of buttons which are used for respectively controlling the vertical turnover device 5 and the stretching and winding device 6.

As shown in fig. 1 and 2, in the present embodiment, two sofa bodies 2 are installed between the first armrest 11 and the second armrest 12, and further, the number of the sofa bodies 2 may be one or more, the sofa body 2 includes two major parts, one of which is used for supporting leg parts, mainly for supporting thigh legs and shank legs, and the other is used for supporting upper body parts, mainly for supporting back and head, the sofa body 2 includes a seat assembly 3 and a backrest assembly 4 installed above the seat assembly 3, the seat assembly 3 includes a horizontal seat 31 for supporting thigh legs and a leg supporting seat 32 for supporting shank legs, and the backrest assembly 4 includes a backrest 41 for supporting back and a headrest 42 for supporting head.

As shown in fig. 2, the headrest 42 of the left sofa body 2 is in a vertically reversed state; the leg support seat 32 is in an extended state; the vertical turnover device 5 on the right sofa body 2 drives the headrest 42 to be in a vertical state; the stretching and rolling device 6 drives the leg support seat 32 to be stretched forwards at the highest position, and particularly, the backrest assembly 4 is internally provided with a vertical turnover device 5 for enabling the headrest 42 to be vertically turned over; the vertical turnover device 5 is arranged, so that the vertical turnover and the turnover angle of the headrest 42 can be automatically controlled, the headrest 42 can be automatically controlled to be vertically unfolded for work, and can be folded down for folding, and the head and the neck can be better supported; meanwhile, the seat component 3 is internally provided with an extending and rolling device 6 for extending and rolling the leg supporting seat 32 forwards and inwards; the leg support seat 32 can be forwards extended and inwards rolled by the extension and rolling device 6, the legs can be supported, the degree of automation is high, the operation is convenient, and the use requirements of users are met.

As shown in fig. 3, the vertical turnover device 5 on the right sofa body 2 drives the headrest 42 to be in a vertical state; the extension and retraction device 6 is fully retracted inwardly in the initial position so that the leg support seat 32 is also retracted inwardly in the initial position.

As shown in fig. 7 to 9, the vertical tilting device 5 includes a first bracket assembly 51 fixedly installed inside the backrest 41, the first bracket assembly 51 is provided with a first motor 81, and specifically, the first bracket assembly 51 includes a bottom support bar 511 transversely arranged and hinged with the first motor 81 and vertical support bars 512 installed at both sides of the bottom support bar 511; further, the bottom support rod 511 and the vertical support rod 512 are fixedly connected by a rivet; the middle part of the bottom support rod 511 is hinged with the first motor 81 through a pin.

Furthermore, a sliding groove 82 is fixedly arranged on the first motor 81, a first extending rod driven by the first motor 81 to reciprocate up and down is arranged in the sliding groove 82, the first extending rod is fixedly connected with a sliding block 83 and drives the sliding block 83 to slide up and down along the sliding groove 82, the sliding block 83 is hinged with a turnover component 84, and the turnover component 84 drives the headrest 42 arranged on the turnover component 84 to turn over vertically.

Specifically, in the present embodiment, the sliding block 83 is driven by a first motor 81, and in other embodiments, the first motor 81 and a first extension rod may be replaced by an air cylinder and an air cylinder extension rod; but may be replaced with a motor and cam arrangement.

When the first motor 81 rotates forward, the sliding block 83 is driven to move upwards along the inside of the sliding chute 82 through the first extension rod; the sliding block 83 drives the overturning component 84 hinged with the sliding block 83 to overturn forwards and vertically; thereby causing the headrest 42 to be vertically flipped forward; when the first motor 81 rotates reversely, the sliding block 83 is driven to move downwards along the inside of the sliding chute 82 by the first extending rod; the slide block 83 drives the turnover component 84 hinged with the slide block 83 to return to the original position; thereby returning the headrest 42 back to the home position.

The flipping assembly 84 includes: a turnover support rod 846 hinged with the slide block 83, an L-shaped connecting rod 841 and a linear connecting rod 842 hinged on the vertical support rod 512; the slide block 83 drives the turning support rod 846 to rotate; the linear connecting rod 842 is fixedly connected with the turnover supporting rod 846, and the linear connecting rod 842 rotates along with the turnover supporting rod 846; one end of the L-shaped connecting rod 841 is further hinged with a first bent connecting rod 843, one end of the linear connecting rod 842 is further hinged with a second bent connecting rod 844, and the middle part of the first bent connecting rod 843 is hinged with the linear connecting rod 842; the first bending link 843 and the second bending link 844 are connected to a turning block 845 through a hinge, and a headrest 42 is fixedly mounted on the turning block 845.

As shown in fig. 7 to 9, the movement process of the headrest 42: when the first motor 81 rotates forward, the sliding block 83 moves upward along the inside of the sliding chute 82; the slide block 83 drives the turning support rod 846 hinged with the slide block 83 to turn forwards; because the linear link 842 is fixedly connected with the turnover support rod 846, the linear link 842 rotates forwards along with the turnover support rod 846; when the linear link 842 rotates forwards, the first bending link 843 hinged with the linear link 842 is driven to be vertical, meanwhile, the first bending link 843 is hinged with one end of the L-shaped link 841, so that the L-shaped link 841 rotates forwards, so that the second bending link 844 hinged with the L-shaped link 841 is vertical, and the first bending link 843 and the second bending link 844 are vertical, so that the headrest 42 fixedly arranged on the first bending link 843 and the second bending link 844 is vertically turned over and unfolded to better support the head and the neck;

when the first motor 81 rotates reversely, the sliding block 83 moves downwards along the inside of the sliding chute 82; the slide block 83 drives the turning support rod 846 hinged with the slide block 83 to turn backwards; because the linear link 842 is fixedly connected with the turnover support rod 846, the linear link 842 rotates backwards along with the turnover support rod 846; when the linear link 842 rotates backwards, the first bending link 843 hinged to the linear link 842 is driven to contract and move downwards, meanwhile, the first bending link 843 is hinged to one end of the L-shaped link 841, so that the L-shaped link 841 rotates backwards, and therefore the second bending link 844 hinged to the L-shaped link 841 also contracts and moves downwards, and the first bending link 843 and the second bending link 844 both contract and move downwards, so that the headrest 42 fixedly mounted on the first bending link 843 and the second bending link 844 overturns backwards and returns to the original position, and folds downwards.

As shown in fig. 1, the sofa body 2 further includes a seat assembly 3 mounted at a lower portion of the backrest assembly 4; the seat assembly 3 comprises a horizontal seat 31 and a leg supporting seat 32 connected with the end of the horizontal seat 31 for leg support, and the inside of the seat assembly 3 is provided with an extending and rolling device 6 for extending and rolling the leg supporting seat 32 forwards.

As shown in fig. 10, the stretching and rolling device 6 includes a second bracket 61 installed inside the seat assembly 3, the second bracket 61 is provided with a second motor 62, the second motor 62 is provided with a second protruding rod 63 driven by the second motor 62 to reciprocate back and forth, and particularly, when the second motor 62 rotates forward, the second protruding rod 63 protrudes; when the second motor 62 rotates reversely, the second extension bar 63 retracts; similarly, in other embodiments, the second motor 62 and the second extension bar 63 may be replaced with an air cylinder and an air cylinder extension bar; but may be replaced with a motor and cam arrangement.

Further, a first cross bar 64 hinged to the second protruding bar 63 is installed on the second protruding bar 63, specifically, the second protruding bar 63 and the first cross bar 64 may be connected by a pin, the first cross bar 64 is installed with at least one stretching and rolling assembly 65, in this embodiment, the number of the stretching and rolling assemblies 65 is two, and the leg support seat 32 is fixedly installed on the stretching and bending assembly 65; the provision of two stretch-bending assemblies 65 ensures that the leg support seat 32 does not deflect, is more stable, and increases the weight-bearing capacity of the leg support seat 32.

As shown in fig. 11, the stretching and rolling assembly 65 includes a first link 71 fixedly mounted on the first cross bar 64, one end of the inner side of the first link 71 is hinged with a second link 72, the middle of the second link 72 is hinged with a third link 73, the second link 72 and the third link 73 form a cross hinge connection, when the second link 72 and the third link 73 are stretched, the length of the second link 72 and the third link 73 is longest, and the height of the second link 72 and the third link 73 is smallest; when the second link 72 and the third link 73 are contracted, the length of the second link 72 and the third link 73 is shortest, and the height of the second link 72 and the third link 73 is largest; similarly, a plurality of sets of links as described above may be installed at the rear ends of the second link 72 and the third link 73, and the lengths of the second link 72 and the third link 73 may be extended.

Specifically, in the present embodiment, the fourth link 74 and the fifth link 75 are also formed as a cross hinge, and the sixth link 76 and the seventh link 77 are also formed as a cross hinge, so that the leg support seat 32 fixedly mounted on the seventh link 77 can be extended or retracted.

Furthermore, one end of the third link 73 is hinged to a horizontal support rod 652, the other end is hinged to a fourth link 74, the end of the second link 72 is hinged to a fifth link 75, the middle of the fifth link 75 is hinged to the fourth link 74, the end is hinged to a sixth link 76, the end of the fourth link 74 is hinged to a seventh link 77, the middle of the seventh link 77 is hinged to the sixth link 76, and the end is fixedly provided with the leg support seat 32.

As shown in fig. 10 and 11, the movement of the leg support seat 32: when the second motor 62 rotates forward, the second extension bar 63 extends outwards; driving the first cross bar 64 to rotate forward; the first connecting rod 71 connected to the first cross rod 64 is rotated and extended, so that the second connecting rod 72 hinged with the first connecting rod 71 is driven to extend forwards, the second connecting rod 72 extends forwards, the third connecting rod 73 also extends forwards, the length of the second connecting rod 72 and the length of the third connecting rod 73 are longest, and the height of the second connecting rod 72 and the height of the third connecting rod 73 are minimum; meanwhile, since both the second link 72 and the third link 73 are extended forward, the fourth link 74 and the fifth link 75, the sixth link 76 and the seventh link 77, which are located at the rear ends of the second link 72 and the third link 73, are driven to be extended forward in succession, so that the leg support seat 32 fixedly mounted on the seventh link 77 is extended forward;

when the second motor 62 rotates reversely, the second extension bar 63 retracts inwards; the first cross bar 64 is driven to rotate backward; the first connecting rod 71 connected to the first cross rod 64 starts to rotate and roll inwards, so that the second connecting rod 72 hinged with the first connecting rod 71 is driven to roll inwards, the second connecting rod 72 rolls inwards, and the third connecting rod 73 is driven to roll inwards, so that the lengths of the second connecting rod 72 and the third connecting rod 73 are shortest, and the heights of the second connecting rod 72 and the third connecting rod 73 are maximum; meanwhile, as the second link 72 and the third link 73 are rolled inward, the fourth link 74 and the fifth link 75, the sixth link 76 and the seventh link 77 which are positioned at the rear ends of the second link 72 and the third link 73 are driven to be rolled inward in succession, so that the leg support seat 32 fixedly mounted on the seventh link 77 is rolled inward; the leg support seat 32 is rolled inward to return to its original position; the use of the extension and retraction device 6 allows for manual adjustment of the leg support seat 32, is simple and convenient to control, facilitates leg support and helps the user lie flat on the seat assembly 3.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. A sofa with a vertically turnable headrest and extendable and retractable leg-supporting seats, characterized by comprising a sofa body (2), wherein the sofa body (2) comprises a backrest component (4) for supporting the back; the backrest component (4) comprises a backrest (41) and a headrest (42) arranged above the backrest (41), a vertical turnover device (5) for vertically turning over the headrest (42) is arranged in the backrest component (4), the vertical turnover device (5) comprises a first bracket component (51) fixedly arranged in the backrest (41), the first bracket component (51) is provided with a first motor (81), a chute (82) is fixedly arranged on the first motor (81), a first extension bar driven by a first motor (81) to reciprocate up and down is arranged in the chute (82), the first extension bar is fixedly connected with the sliding block (83) and drives the sliding block (83) to slide up and down along the sliding groove (82), slider (83) hinged joint has upset subassembly (84), upset subassembly (84) drive install headrest (42) vertical upset on upset subassembly (84).

2. The sofa with vertically-tiltable headrest and extendable and retractable leg-support seat as claimed in claim 1, wherein the first frame assembly (51) comprises a bottom support bar (511) transversely disposed and hinged to the first motor (81) and vertical support bars (512) installed at both sides of the bottom support bar (511); the bottom support rod (511) and the vertical support rod (512) are fixedly connected through rivets; the middle part of the bottom supporting rod (511) is hinged with the first motor (81) through a pin.

3. The sofa with vertically tiltable headrest and extendable and retractable leg-support seat as claimed in claim 2, wherein said tilt assembly (84) comprises: a turnover support rod (846) hinged with the slide block (83), an L-shaped connecting rod (841) and a linear connecting rod (842) hinged on the vertical support rod (512); the slide block (83) drives the turnover support rod (846) to rotate; the linear connecting rod (842) is fixedly connected with the turnover supporting rod (846), and the linear connecting rod (842) rotates along with the turnover supporting rod (846); one end of the L-shaped connecting rod (841) is further hinged with a first bent connecting rod (843), one end of the linear connecting rod (842) is further hinged with a second bent connecting rod (844), and the middle part of the first bent connecting rod (843) is hinged with the linear connecting rod (842); the first bending connecting rod (843) and the second bending connecting rod (844) are connected with a turnover block (845) through hinges, and a headrest (42) is fixedly arranged on the turnover block (845).

4. The sofa with vertically-turnable headrest and extendable and retractable leg-support seats as claimed in claim 1, wherein the sofa body (2) further comprises a seat assembly (3) mounted on the lower part of the backrest assembly (4); the seat assembly (3) comprises a horizontal seat (31) and a leg supporting seat (32) connected with the end part of the horizontal seat (31) and used for supporting legs, and an extending and rolling device (6) used for enabling the leg supporting seat (32) to extend and roll forwards is arranged in the seat assembly (3).

5. The sofa with vertically overturnable headrest and extendable and retractable leg-supporting seat according to claim 4, wherein the extension and retraction device (6) comprises a second bracket (61) installed inside the seat component (3), the second bracket (61) is provided with a second motor (62), the second motor (62) is provided with a second extension bar (63) driven by the second motor (62) to reciprocate back and forth, the second extension bar (63) is provided with a first cross bar (64) hinged with the second extension bar (63), the first cross bar (64) is provided with at least one extension and retraction component (65), and the extension and retraction component (65) is fixedly provided with the leg-supporting seat (32).

6. The sofa with vertically overturnable headrest and extendable and retractable leg-supporting seat according to claim 5, wherein the extendable and retractable assembly (65) comprises a first connecting rod (71) fixedly installed on the first cross rod (64), a second connecting rod (72) is hinged to one end of the inner side of the first connecting rod (71), a third connecting rod (73) is hinged to the middle of the second connecting rod (72), a horizontal supporting rod (652) is hinged to one end of the third connecting rod (73), a fourth connecting rod (74) is hinged to the other end of the third connecting rod, a fifth connecting rod (75) is hinged to the end of the second connecting rod (72), a sixth connecting rod (76) is hinged to the middle of the fifth connecting rod (75), a seventh connecting rod (77) is hinged to the end of the fourth connecting rod (74), and a sixth connecting rod (76) is hinged to the middle of the seventh connecting rod (77), the end is fixedly provided with a leg supporting seat (32).

7. The sofa with vertically overturnable headrest and extendable and retractable leg-supporting seat according to claim 4, wherein said sofa body (2) is provided with a plurality of seats arranged side by side; one side of the sofa body (2) is provided with a first armrest (11), and the other side is provided with a second armrest (12).

8. The sofa with vertically tiltable headrest and extendable and retractable leg-supporting seat as claimed in claim 7, wherein the first arm-rest (11) or the second arm-rest (12) is provided with a control switch (9) for controlling the vertically tilting device (5) and the extending and retracting device (6).

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