CN213962584U - Functional sofa with simple structure - Google Patents

Abstract

The application relates to a functional sofa with a simple structure, which comprises an armrest part, wherein the armrest part comprises two symmetrically arranged mounting plates; the sitting part comprises a seat frame arranged between the two mounting plates and a cushion arranged on the seat frame; the backrest comprises a backrest frame and a backrest pad arranged on the backrest frame, and the backrest frame is rotatably connected with the seat frame; and a transmission part for linking the backrest part and the seat part. In daily state, the sofa is in sitting posture. When a person needs to lie on his back, the back of the person can apply force to the backrest part to enable the backrest part to rotate relative to the armrest part, the seat part slides towards one side far away from the backrest part relative to the armrest part, and the seat part rotates relative to the armrest part to enable one end, far away from the backrest part, of the seat part to tilt upwards. Therefore, the thigh of the user can be slightly lifted, and the user is more suitable for the lying posture. Thereby making the user more comfortable.

Description

Functional sofa with simple structure

Technical Field

The application relates to the field of home furnishing, in particular to a functional sofa with a simple structure.

Background

With the improvement of living standard, people have higher and higher requirements on furniture products, and the diversity of morphological functions of the sofa becomes the mainstream of sofa research at present as a household product with higher use frequency.

In order to meet the requirements of various users, there are various functional sofas in the prior art, and the backrest of the functional sofa can rotate relative to the sofa body, so as to adjust the angle of the backrest of the functional sofa. Thereby being suitable for more using scenes. However, the existing sofa is complex in structure or only has the backrest to rotate, and still cannot meet the use requirements of people.

In view of the above-mentioned related art, the applicant believes that there is a drawback that it is uncomfortable to use and fails to satisfy the user's needs.

SUMMERY OF THE UTILITY MODEL

In order to improve user's comfort level, the utility model provides a simple structure's functional sofa adopts following technical scheme:

a functional sofa with simple structure comprises

The armrest part comprises two symmetrically arranged mounting plates;

the sitting part comprises a seat frame arranged between the two mounting plates and a cushion arranged on the seat frame;

the backrest comprises a backrest frame and a backrest pad arranged on the backrest frame, and the backrest frame is rotatably connected with the seat frame;

the transmission part is used for enabling the backrest part and the seat part to be linked, when the backrest part rotates relative to the armrest part and tilts backwards, the backrest part slides towards the direction close to the seat part relative to the armrest part, the seat part slides towards the side far away from the backrest part relative to the armrest part, and the seat part rotates relative to the armrest part to enable one end, far away from the backrest part, of the seat part to tilt upwards;

the resetting piece is used for keeping the backrest part in a sitting posture under the condition of not being influenced by external force, and the sitting part is parallel to the ground in the sitting posture.

By adopting the technical scheme, the sofa is in a sitting posture state in a daily state. When a person needs to lie on his back, the back of the person can apply force to the backrest part to enable the backrest part to rotate relative to the armrest part. Since the person's center of gravity and the point at which the backrest portion rotates relative to the armrest portion do not coincide with each other, the sofa is configured such that the backrest portion slides relative to the armrest portion in a direction toward the sitting portion, so that the relative displacement between the user's back and the backrest portion can be reduced, and the comfort in use can be improved. At the same time, the seat part slides towards the side far away from the backrest part relative to the armrest part, and the seat part rotates relative to the armrest part to enable one end of the seat part far away from the backrest part to incline upwards. Therefore, the thigh of the user can be slightly lifted, and the user is more suitable for the lying posture. Thereby making the user more comfortable.

Simultaneously, when the user stands up, under the effect of piece that resets, the back portion can reset to the position of sitting state by oneself, because the linkage of transmission portion, so the portion of taking a seat also can reset, convenient to use, simple structure.

Preferably, the transmission part comprises

The first guide rail is arranged on the mounting plate and used for guiding the movement of one end, far away from the backrest, of the seat frame, a first guide shaft which is connected into the first guide rail in a sliding mode is arranged on the seat frame, and the first guide shaft is connected to the seat frame in a rotating mode;

the backrest frame is provided with a third guide shaft which is connected in the third guide rail in a sliding way, and the third guide shaft is rotationally connected with the backrest frame;

the first linkage rod is rotatably connected with the backrest frame;

and the second linkage rod is rotatably connected to the first linkage rod, and two ends of the second linkage rod are respectively rotatably connected to the backrest frame and the seat frame.

By adopting the technical scheme, the linkage of the backrest part and the sitting part is realized, so that the sofa can be stably converted from a sitting posture to a lying posture.

Preferably, the transmission part further comprises a second guide rail mounted on the mounting plate, the second guide rail is used for guiding the movement of one end of the backrest frame close to the sitting part, a second guide shaft connected in the second guide rail in a sliding manner is mounted on the backrest frame, and the second guide shaft is rotatably connected to the backrest frame; and the connecting line of the first guide shaft, the second guide shaft and the third guide shaft forms a triangle.

By adopting the technical scheme, a stable triangle is formed, so that the sitting part and the backrest part can move more stably and smoothly relative to the armrests.

Preferably, the connecting point of the second linkage rod and the backrest frame is A, the connecting point of the second linkage rod and the seat frame is B, the connecting point of the second linkage rod and the first linkage rod is C, and the length of the AB connecting line is greater than that of the BC connecting line.

By adopting the technical scheme, when the backrest part rotates greatly, the sitting part can rotate only by a small amplitude according to the proportion, so that the sitting part is in line with a man-machine.

Preferably, the axis of the second guide shaft is set to be D, the connecting point of the first linkage rod and the backrest frame is set to be E, and D is located between AE.

By adopting the technical scheme, the AE is the relation between two ends of the lever, when the point slides along the first guide rail, two points of the AE can synchronously start to move, so that the backrest part smoothly finishes backward tilting and slides towards the direction close to the sitting part relative to the armrest part.

Preferably, the second linkage rod comprises

The first connecting rod is L-shaped, and one end of the first connecting rod is rotatably connected with the backrest frame;

the corner end of the second connecting rod is rotatably connected to the seat frame, and one end of the second connecting rod is rotatably connected to the first linkage rod;

and the third connecting rod is fixedly connected with one end of the first connecting rod, which is far away from the backrest frame, and one end of the second connecting rod, which is far away from the first linkage rod.

Through adopting above-mentioned technical scheme, the third connecting rod links together two different planar head rods and the ingenious of second connecting rod. The first connecting rod and the second connecting rod are both L-shaped, and the arrangement direction of the L-shaped is towards the stress direction of the L-shaped, so that the first connecting rod and the second connecting rod are not easy to deform. And the riding part and most of the weight of the user sitting on the riding part are concentrated on the point B, and the point B is arranged at the corner end of the second connecting rod, so that the stress deformation probability of the second connecting rod can be reduced.

Preferably, the first guide rail and the third guide rail are respectively located at two ends of the second guide rail, an included angle between a motion track of the first guide shaft and a motion track of the second guide shaft is 150-160 degrees, and an included angle between a motion track of the third guide shaft and a motion track of the second guide shaft is 140-150 degrees.

By adopting the technical scheme, the movement amplitude of the backrest part relative to the armrests and the movement amplitude of the seat part relative to the armrests are in a perfect matching state, namely when the backrest part rotates backwards and inclines, the seat part moves forwards synchronously and slightly rotates, so that the backrest part is matched. When the sofa is converted from a sitting posture to lying, no gap is formed between the backrest part and the sitting part, thereby improving the use comfort.

Preferably, the first guide shaft comprises a first mounting shaft mounted on the seat frame and a first bearing sleeved on the first mounting shaft, and the first bearing is slidably connected to the first guide rail; the second guide shaft comprises a second mounting shaft mounted on the backrest frame and a second bearing sleeved on the second mounting shaft, and the second bearing is connected to the second guide rail in a sliding manner; the third guiding axle is including installing the third installation axle on the back frame and locating the epaxial third bearing of third installation with the cover, third bearing sliding connection is in the third guide rail.

By adopting the technical scheme, the resistance of the sofa in the conversion of the sitting posture state and the lying posture state is reduced, and the state switching is smoother and easier.

Preferably, the piece that resets is reset spring, and reset spring one end fixed connection is in the third guiding axle, reset spring keeps away from first guiding axle one end and installs in the mounting panel and be close to back portion one end, reset spring is the slope and sets up and be roughly parallel to the direction of motion of first guiding axle.

Through adopting above-mentioned technical scheme, realize the application of force to first guiding axle through reset spring's restoring force, when making back portion not atress, the sofa can be stably in the position of sitting state. Meanwhile, due to the inclined arrangement of the return spring, useless component force can be reduced, and the elastic potential energy of the return spring is endowed to the first guide shaft as much as possible.

Preferably, the transmission parts are provided with two groups and are respectively positioned at two sides of the seat frame, one mounting plate corresponds to one transmission part, and the transmission parts are mounted on the corresponding mounting plates.

By adopting the technical scheme, both sides of the sitting part and the backrest part are stressed, and the sitting part and the backrest part can move relative to the armrest part more stably. The sofa can be smoothly converted between the sitting posture state and the lying posture state.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the two postures of sitting posture and lying posture can be converted under the condition of no external power source, and the structure is simple;

2. the posture adjusting device is more suitable for the posture required by a user when the user lies on the back, and the use comfort level is high;

3. can be smoothly and stably converted under two postures, is stable to use and has long service life.

Drawings

FIG. 1 is a schematic structural diagram of the embodiment in a sitting posture.

Fig. 2 is a schematic structural diagram of a seat frame, a backrest frame and a mounting plate in the embodiment.

FIG. 3 is a schematic structural view of the embodiment in a lying position;

FIG. 4 is a schematic structural view of a mounting plate in the embodiment;

FIG. 5 is a sectional view of the embodiment;

FIG. 6 is a schematic structural diagram of the transmission part according to the embodiment;

fig. 7 is a schematic structural diagram of the embodiment embodying the reset member.

Description of reference numerals: 1. a seating part; 2. a backrest part; 3. a base; 4. a support leg; 5. a handrail; 6. mounting a plate; 7. a seat frame; 8. a transmission section; 9. a first guide rail; 10. a second guide rail; 11. a third guide rail; 12. a first linkage rod; 13. a second linkage rod; 14. a first guide shaft; 15. a first mounting shaft; 16. a first bearing; 17. a second guide shaft; 18. a second mounting shaft; 19. a second bearing; 20. a third guide shaft; 21. a third mounting shaft; 22. a third bearing; 23. a backrest frame; 24. a first connecting rod; 25. a second connecting rod; 26. a third connecting rod; 27. a reset member.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a functional sofa with a simple structure. Referring to fig. 1, a functional sofa having a simple structure includes a support portion, armrest portions, a seat portion 1, and a backrest portion 2. The supporting part comprises a base 3 and four support legs 4 fixedly arranged on the lower end surface of the base 3. Referring to fig. 1 and 2, the armrest portion includes two armrests 5 symmetrically disposed, and each armrest 5 is formed by a mounting plate 6 and a wrapping sleeve wrapped outside the mounting plate 6. Sponge is filled between the wrapping sleeve and the mounting plate 6. A reinforcing rod for reinforcing the integral type of the armrest part is connected between the two mounting plates 6. The armrests 5 are fixedly connected to the two sides of the base 3 through mounting plates 6. The seating portion 1 is installed between the two armrests 5 and placed above the base 3. The backrest part 2 is installed between the two armrests 5 and is located at one end of the seat part 1.

Referring to fig. 1, when the sofa is in a sitting position, a seating part 1 is parallel to the ground, and a backrest part 2 is almost perpendicular to the seating part 1, so that a user can be stably supported while sitting up. Referring to fig. 3, when the sofa is in the lying position, the backrest 2 is tilted rearward with respect to the armrest rotation, and the backrest 2 slides toward the direction approaching the sitting portion 1 with respect to the armrest. Meanwhile, the sitting part 1 slides towards the side far away from the backrest part 2 relative to the armrest part, and the sitting part 1 rotates relative to the armrest part to enable one end of the sitting part 1 far away from the backrest part 2 to incline upwards. After the sofa is moved to this state, the user can comfortably lie on the sofa while being stably supported.

Specifically, referring to fig. 2, the seat portion 1 includes a seat frame 7 mounted between two mounting plates 6, and a seat cushion fitted over the seat frame 7. The backrest part 2 includes a backrest frame 23 and a backrest cushion mounted on the backrest frame 23, and the backrest frame 23 is rotatably connected to the seat frame 7. Both sides of the seat frame 7 are provided with transmission parts 8, one mounting plate 6 corresponds to one transmission part 8, and the transmission parts 8 are mounted on the corresponding mounting plates 6. The transmission unit 8 is used to link the backrest 2 and the seat 1. That is, when the backrest 2 is tilted backward, the sitting portion 1 is moved in synchronization to ensure that the user can stably sit on the sofa when the sofa is changed.

Referring to fig. 4 and 5, the transmission part 8 includes a first guide rail 9, a second guide rail 10, a third guide rail 11, a first linkage rod 12, and a second linkage rod 13. First guide rail 9, second guide rail 10, third guide rail 11 all install on mounting panel 6, and first guide rail 9 and third guide rail 11 are located second guide rail 10 both ends respectively. The angle between the length direction of the second guide rail 10 and the ground plane is 5 °. The angle between the length direction of the first guide rail 9 and the length direction of the second guide rail 10 is 143 °. The angle between the length direction of the third rail 11 and the length direction of the second rail 10 is 155 °.

Referring to fig. 4 and 5, the first guide shaft 14 is installed at the middle of the back frame 23, and the second guide shaft 17 is installed at the lower end of the back 2. The first guide shaft 14 includes a first mounting shaft 15 mounted on the seat frame 7 and a first bearing 16 sleeved on the first mounting shaft 15, and the first bearing 16 is slidably connected to the first guide rail 9. The second guide shaft 17 includes a second mounting shaft 18 mounted on the backrest frame 23 and a second bearing 19 sleeved on the second mounting shaft 18, and the second bearing 19 is slidably connected to the second guide rail 10.

Referring to fig. 4 and 5, a third guide shaft 20 is installed at one end of the seat frame 7 near the back frame 23. The third guide shaft 20 includes a third mounting shaft 21 mounted on the backrest frame 23 and a third bearing 22 sleeved on the third mounting shaft 21, and the third bearing 22 is slidably connected to the third guide rail 11. The first bearing 16, the second bearing 19, and the third bearing 22 are rolling bearings. The connecting line of the first guide shaft 14, the second guide shaft 17 and the third guide shaft 20 forms a triangle.

Referring to fig. 5 and 6, one end of the first linkage rod 12 is rotatably connected to the back frame 23. The second linkage rod 13 includes a first connecting rod 24 in an L-shape, a second connecting rod 25 in an L-shape, and a third connecting rod 26 for connecting the first connecting rod 24 and the second connecting rod 25. One end of the first connecting rod 24 is rotatably connected to the backrest frame 23, and a corner end thereof is disposed toward a side away from the sitting portion 1. The corner end of the second connecting link 25 faces the side close to the seat 1. The corner end of the second connecting rod 25 is rotatably connected to the seat frame 7, and one end of the second connecting rod 25 is rotatably connected to the first linkage rod 12. The third connecting rod 26 is fixedly connected to one end of the first connecting rod 24 far away from the backrest frame 23 and one end of the second connecting rod 25 far away from the first linkage rod 12.

A connecting point of the second linkage rod 13 and the backrest frame 23 is A, a connecting point of the second linkage rod 13 and the seat frame 7 is B, a connecting point of the second linkage rod 13 and the first linkage rod 12 is C, the axis of the second guide shaft 17 is D, and a connecting point of the first linkage rod 12 and the backrest frame 23 is E. The length of the AB line is greater than that of the BC line. D is located between AE.

When the sofa is changed from the sitting posture to the lying posture, the back of the user applies force to the backrest 2, the movement tracks of the backrest 2 and the seat 1 are determined under the limit of the first guide rail 9, the second guide rail 10 and the third guide rail 11, and the movement amplitude of the backrest 2 relative to the armrests 5 and the movement amplitude of the seat 1 relative to the armrests 5 are in a perfect matching state. That is, when the backrest part 2 is tilted backward, the sitting part 1 is moved forward in synchronization and slightly rotated to engage with the backrest part 2. When the sofa is converted from a sitting posture to a lying posture, no gap is generated between the backrest part 2 and the sitting part 1, thereby improving the use comfort.

The structure only uses two rod pieces, and the structure is simple and compact. The first connecting rod and the second connecting rod are both L-shaped, and the arrangement direction of the L-shaped is towards the stress direction of the L-shaped, so that the first connecting rod and the second connecting rod are not easy to deform. The riding part and most of the weight of a user sitting on the riding part are concentrated on the point B, the point B is arranged at the corner end of the second connecting rod, and the probability of stress deformation of the second connecting rod can be reduced.

Referring to fig. 7, in order to facilitate the sofa to change from the lying posture to the sitting posture, the mounting plate 6 is further provided with a resetting member 27, and the resetting member 27 is provided with two mounting plates 6, one mounting plate 6 corresponds to one resetting member 27. The reset piece 27 is a reset spring, one end of the reset spring is fixedly connected to the third guide shaft 20, and the end of the reset spring far away from the first guide shaft 14 is installed at the end of the installation plate 6 close to the backrest 2. The return spring is disposed obliquely and approximately parallel to the direction of movement of the first guide shaft 14.

When the user stands up, under the effect of the reset piece 27, the backrest part 2 can be automatically reset to the sitting posture state, and the sitting part 1 can also be reset due to the linkage of the transmission part 8, so that the use is convenient.

The implementation principle of the functional sofa with a simple structure in the embodiment of the application is as follows:

the sofa comprises two postures: sitting and lying.

When the sofa is in a sitting position, the sitting part 1 is parallel to the ground, the backrest part 2 is almost vertical to the sitting part 1, the first guide shaft 14 is positioned at one end of the first guide rail 9 facing the backrest part 2, the second guide shaft 17 is positioned at one end of the second guide rail 10 facing the backrest part 2, and the third guide shaft 20 is positioned at one end of the third guide rail 11 facing the backrest part 2. The return spring is in a tensioned state pulling the backrest part 2 towards the seat part 1. At this time, the user may sit upright on the seat portion 1, or may sit askew on the seat portion 1 and lean on the armrest 5.

When the sofa is in the lying position, the backrest part 2 is tilted backward. While the seat part 1 is inclined upward away from the backrest part 2. The return spring is stretched. At this time, the user lies on the plane formed by the sitting portion 1 and the backrest portion 2, and the thigh is slightly lifted near the calf, so that a comfortable posture is achieved.

When the sofa needs to be changed from the sitting posture to the lying posture, a user applies force to the backrest 2, the backrest 2 rotates relative to the armrest parts to realize a backward tilting posture, and the lower end of the backrest 2 moves towards the sitting part 1. Simultaneously, under the linkage of the transmission part 8, the sitting part 1 rotates relative to the armrest part, one end of the sitting part 1 departing from the backrest part 2 inclines upwards, and the sitting part 1 moves towards one side far away from the backrest part 2. In this process, no gap is formed between the sitting portion 1 and the backrest portion 2. The user can sit on the sofa, and the posture can be easily changed without external force.

When the sofa needs to be changed from a lying posture to a sitting posture, the user only needs to hold the handrail 5 and then slowly rise. During the rising process, both the backrest part 2 and the sitting part 1 are reset towards the sitting state due to the tension of the reset spring. In this process, the backrest part 2 supports the back of the user at all times, so that the user can get up easily.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a simple structure's functional sofa which characterized in that: comprises that

The armrest part comprises two symmetrically arranged mounting plates (6);

the seat comprises a sitting part (1), wherein the sitting part (1) comprises a seat frame (7) arranged between two mounting plates (6) and a cushion arranged on the seat frame (7);

the backrest part (2), the backrest part (2) comprises a backrest frame (23) and a backrest cushion arranged on the backrest frame (23), and the backrest frame (23) is rotatably connected with the seat frame (7);

the transmission part (8) is used for enabling the backrest part (2) and the seat part (1) to be linked, when the backrest part (2) rotates relative to the armrest part and tilts backwards, the backrest part (2) slides relative to the armrest part in the direction close to the seat part (1), the seat part (1) slides relative to the armrest part in the direction far away from the backrest part (2), and the seat part (1) rotates relative to the armrest part to enable one end, far away from the backrest part (2), of the seat part (1) to tilt upwards;

a reset element (27) for keeping the backrest part (2) in a sitting position under the condition of not being affected by external force, and in the sitting position, the sitting part (1) is parallel to the ground.

2. A functional sofa of simple structure as claimed in claim 1, wherein: the transmission part (8) comprises

The first guide rail (9) is arranged on the mounting plate (6) and used for guiding the movement of one end, away from the backrest part (2), of the seat frame (7), a first guide shaft (14) which is connected into the first guide rail (9) in a sliding mode is mounted on the seat frame (7), and the first guide shaft (14) is connected to the seat frame (7) in a rotating mode;

the third guide rail (11) is arranged on the mounting plate (6) and used for guiding the backrest frame (23) to move relative to the armrest part, a third guide shaft (20) which is connected in the third guide rail (11) in a sliding mode is mounted on the backrest frame (23), and the third guide shaft (20) is connected to the backrest frame (23) in a rotating mode;

a first linkage rod (12) rotatably connected to the backrest frame (23);

a second linkage rod (13) which is rotationally connected with the first linkage rod (12), and two ends of the second linkage rod (13) are respectively rotationally connected with the backrest frame (23) and the seat frame (7).

3. A functional sofa according to claim 2, wherein the sofa is characterized in that: the transmission part (8) further comprises a second guide rail (10) arranged on the mounting plate (6), the second guide rail (10) is used for guiding the movement of one end, close to the sitting part (1), of the backrest frame (23), a second guide shaft (17) connected into the second guide rail (10) in a sliding mode is mounted on the backrest frame (23), and the second guide shaft (17) is connected to the backrest frame (23) in a rotating mode; the connecting line of the first guide shaft (14), the second guide shaft (17) and the third guide shaft (20) forms a triangle.

4. A functional sofa according to claim 3, wherein the sofa is characterized in that: the connecting point of the second linkage rod (13) and the backrest frame (23) is A, the connecting point of the second linkage rod (13) and the seat frame (7) is B, the connecting point of the second linkage rod (13) and the first linkage rod (12) is C, and the length of the AB connecting line is greater than that of the BC connecting line.

5. The functional sofa of claim 4, wherein the sofa further comprises: and D is the axis of the second guide shaft (17), the connecting point of the first linkage rod (12) and the backrest frame (23) is E, and D is positioned between AE.

6. A functional sofa according to claim 2, wherein the sofa is characterized in that: the second linkage rod (13) comprises

One end of the first connecting rod (24) is rotatably connected with the backrest frame (23);

the corner end of the second connecting rod (25) is rotatably connected to the seat frame (7), and one end of the second connecting rod (25) is rotatably connected to the first linkage rod (12);

and the third connecting rod (26) is used for connecting the first connecting rod (24) and the second connecting rod (25), and the third connecting rod (26) is fixedly connected to one end, away from the backrest frame (23), of the first connecting rod (24) and one end, away from the first linkage rod (12), of the second connecting rod (25).

7. A functional sofa according to claim 3, wherein the sofa is characterized in that: first guide rail (9) and third guide rail (11) are located second guide rail (10) both ends respectively, the orbit of first guiding axle (14) motion and the contained angle of the motion orbit of second guiding axle (17) are 150~160, the orbit of third guiding axle (20) motion and the contained angle of the motion orbit of second guiding axle (17) are 140~ 150.

8. A functional sofa according to claim 3, wherein the sofa is characterized in that: the first guide shaft (14) comprises a first mounting shaft (15) mounted on the seat frame (7) and a first bearing (16) sleeved on the first mounting shaft (15), and the first bearing (16) is connected to the first guide rail (9) in a sliding manner; the second guide shaft (17) comprises a second mounting shaft (18) mounted on the backrest frame (23) and a second bearing (19) sleeved on the second mounting shaft (18), and the second bearing (19) is connected to the second guide rail (10) in a sliding manner; the third guide shaft (20) comprises a third mounting shaft (21) mounted on the backrest frame (23) and a third bearing (22) sleeved on the third mounting shaft (21), and the third bearing (22) is connected to the third guide rail (11) in a sliding mode.

9. A functional sofa of simple structure as claimed in claim 1, wherein: reset member (27) are reset spring, and reset spring one end fixed connection is in third guiding axle (20), reset spring keeps away from first guiding axle (14) one end and installs in mounting panel (6) and be close to back portion (2) one end, reset spring is the direction of motion that the slope set up and be roughly parallel to first guiding axle (14).

10. A functional sofa according to claim 2, wherein the sofa is characterized in that: the transmission parts (8) are provided with two groups and are respectively positioned on two sides of the seat frame (7), one of the mounting plates (6) corresponds to one of the transmission parts (8), and the transmission parts (8) are mounted on the corresponding mounting plates (6).

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