CN114652126A - Liftable adjust electronic sofa seat - Google Patents

Abstract

The invention relates to a seat, in particular to an electric sofa seat capable of being adjusted in a lifting mode. The liftable adjustment electric sofa seat which is convenient for people to carry out lifting adjustment on the sofa seat and has good use effect needs to be designed. The utility model provides a liftable adjust electronic sofa seat, includes base, landing leg, fixed seat and backup plate, and four landing legs have been placed at the base top interval, and the rigid coupling has fixed seat between four landing leg tops, and fixed seat top rear side rigid coupling has the backup plate. According to the invention, the servo motor is started to work, the servo motor rotates to drive the stud to rotate through the first column gear, the stud rotates to drive the threaded plate to move up and down, the threaded plate moves up and down to drive the mounting frame to move up and down, the mounting frame moves up and down to drive the fixed seat plate to move up and down, the fixed seat plate moves up and down to a proper position, and the servo motor is turned off.

Description

Liftable adjust electronic sofa seat

Technical Field

The invention relates to a seat, in particular to an electric sofa seat capable of being adjusted in a lifting mode.

Background

With the improvement of living standard of people, many people improve the experience when watching television or movies, and most people can select a sofa seat which is more comfortable to install for use.

Patent application CN216166436U discloses a sofa seat, which comprises a bracket, be equipped with bedplate and back on the support, be equipped with the detachable cushion on bedplate and the back respectively, be equipped with the fretwork portion that link up on bedplate and the back respectively, fretwork portion includes the mounting hole that a plurality of intervals set up, the cushion is including the backplate and the soft package of range upon range of setting, soft package one side is kept away from to the backplate has a plurality of installation departments, the installation department aligns with the mounting hole and the part passes the mounting hole, the one end of the mounting hole that the installation department passed has hook portion, hook portion keeps away from with bedplate/back the one side of cushion is supported and is held. The sofa seat provided by the invention can conveniently replace the damaged soft cushion, the maintenance cost of the sofa seat is reduced, or the soft cushion is taken down when the temperature is higher, so that the situation that audiences feel sultry when sitting on the sofa seat is avoided, and meanwhile, the sofa seat can ventilate through the hollow part on the back plate of the seat plate, so that the comfort level of the sofa seat is improved. Although the comfort level of the sofa seat is improved, the sofa seat cannot be conveniently lifted and adjusted by people, and the using effect is low.

Based on the defects in the prior art, the liftable electric sofa seat is convenient for people to carry out lifting adjustment on the sofa seat and good in using effect.

Disclosure of Invention

In order to overcome the defects that the sofa seat in the patent cannot be conveniently lifted and adjusted by people and the using effect is low, the invention provides the lifting and adjusting electric sofa seat which is convenient for people to lift and adjust the sofa seat and has a good using effect.

The technical implementation scheme of the invention is as follows:

the utility model provides a liftable adjust electronic sofa seat, has four landing legs including base, landing leg, fixed seat, backup plate, elevating system and expanding mechanism, and the rigid coupling has fixed seat between four landing leg tops, and fixed seat top rear side rigid coupling has the backup plate, is equipped with the elevating system who is used for lift adjustment between base and the fixed seat, is equipped with on the fixed seat to be used for making things convenient for many people to sit upright expanding mechanism.

In a preferred embodiment of the invention, the lifting mechanism comprises a fixed seat, a stud, a servo motor, first column gears, a mounting rack, a thread plate, a vertical rod and a sliding ring, wherein the fixed seat is fixedly connected in the middle of the top of the base, the stud is rotatably arranged on the fixed seat, the servo motor is fixedly connected at the rear side position in the top of the base, the first column gears are fixedly connected to an output shaft of the servo motor and the lower part of the stud, the two first column gears are mutually meshed, the mounting rack is fixedly connected in the middle of the bottom of the fixed seat plate, the thread plate is fixedly connected in the mounting rack, the thread plate is in threaded connection with the stud, the vertical rod is fixedly connected in the middle of the front side of the top of the base in a left-right symmetrical mode, the sliding rings are arranged on the vertical rods on the left side and the right side in a sliding mode, and the sliding rings on the left side and the right side are fixedly connected with the mounting rack.

In a preferred embodiment of the invention, the expanding mechanism comprises a fixed block, a first rotating rod, a rotating block, a movable seat plate and a limiting block, wherein the fixed block is fixedly connected to the middle part of the left side and the right side of the fixed seat plate, the first rotating rod is rotatably arranged on the fixed block on the left side and the right side, the rotating block is symmetrically and fixedly connected to the first rotating rod on the left side and the right side, the movable seat plate is fixedly connected between the tops of the two rotating blocks on the left side and the right side, the limiting block is symmetrically and fixedly connected to the rear side of the bottom of the fixed seat plate, and the movable seat plate on the left side and the right side can swing outwards to be respectively contacted with the limiting blocks on the left side and the right side.

In a preferred embodiment of the invention, the backrest unfolding mechanism is used for facilitating a plurality of people to carry out backrest, the backrest unfolding mechanism comprises a rotating shaft, a transmission component, a second rotating rod, a first bevel gear and a rotating backrest, the rotating shaft is rotatably arranged in the middle of the left and right limiting blocks, the transmission component is connected between the rear part of the left rotating shaft and the rear part of the left first rotating rod, the transmission component is connected between the rear part of the right rotating shaft and the rear part of the right first rotating rod, the transmission component consists of two belt pulleys and a belt, one belt pulley is arranged at the rear part of the rotating shaft, the other belt pulley is arranged at the rear part of the first rotating rod, the belt is wound between the two belt pulleys, the second rotating rods are rotatably arranged at the left and right sides of the backrest plate, the first bevel gears are fixedly connected at the lower parts of the left and right first rotating rods, the two first bevel gears are mutually meshed, the right and the left bevel gears are mutually meshed, the middle parts of the second rotating rods on the left side and the right side are fixedly connected with a rotating backrest for facilitating a plurality of people to carry out backrest.

In a preferred embodiment of the invention, the invention further comprises a supporting mechanism for further supporting the movable seat plate, the supporting mechanism comprises a mounting block, a rotating column, a second bevel gear, a limiting plate, a supporting plate and a rack, the mounting block is fixedly connected to the rear side of the bottom of the fixed seat plate in a bilateral symmetry manner, the rotating column is rotatably arranged on the side far away from the mounting block on the left side and the right side, the second bevel gear is fixedly connected to the upper part of the rotating column on the left side and the rotating column on the right side, the second bevel gear is fixedly connected to the lower part of the rotating column on the left side and the rotating shaft on the right side, the two second bevel gears on the left side are mutually meshed, the two second bevel gears on the right side are mutually meshed, the limiting plate is fixedly connected to the front side of the bottom of the fixed seat plate in a bilateral symmetry manner, the supporting plate for further supporting the movable seat plate is slidably arranged in the limiting plates on the left side and the limiting plate on the right side, the movable seat plate on the left side can be respectively contacted with the supporting plate when swinging outwards, the left and right sides limiting plate rear portion all slidingtype is equipped with the rack, left backup pad and left rack fixed connection, right-hand backup pad and right-hand rack fixed connection, left rack and left second column gear engagement, right-hand rack and right-hand second column gear engagement.

In a preferred embodiment of the present invention, the seat cushion further comprises a buffer mechanism for buffering the movable seat plate, the buffer mechanism comprises a contact plate and buffer springs, the contact plate for buffering the movable seat plate is slidably disposed on the side of the left and right support plates away from each other, the left and right movable seat plates swing outwards and can be respectively contacted with the left and right contact plates, and four buffer springs are fixedly connected between the left and right contact plates and the left and right support plates at uniform intervals.

In a preferred embodiment of the present invention, the present invention further comprises a protection mechanism for protecting the first bevel gear and the second bevel gear, the protection mechanism comprises a connecting block, an arc-shaped baffle and a retaining disc, the two connecting blocks are fixedly connected to the rear lower portions of the outer side surfaces of the left and right movable seat plates, the arc-shaped baffle is fixedly connected between the lower portions of the left two connecting blocks, the arc-shaped baffle is fixedly connected between the lower portions of the right two connecting blocks, and the retaining disc is fixedly connected to the rear portions of the left and right arc-shaped baffles.

In a preferred embodiment of the present invention, the present invention further comprises four rubber cushion blocks, and the bottom of the base is fixedly connected with the four rubber cushion blocks at intervals.

The invention has the beneficial effects that:

1. through starting servo motor work, servo motor rotates and drives the double-screw bolt through first column gear and rotate, and the double-screw bolt rotates and drives the threading board and reciprocate, and the threading board reciprocates and drives the mounting bracket and reciprocate, and the mounting bracket reciprocates and drives fixed seat and reciprocate, and fixed seat reciprocates and close servo motor to suitable position can, so, make things convenient for people to carry out lift adjustment, excellent in use effect to sofa seat.

2. Under supporting mechanism's effect, the outside removal of left and right sides backup pad supports left and right sides activity seat respectively, so, can further support left and right sides activity seat for the activity seat is more firm.

3. Under the effect of protection machanism, left and right sides cowl and fender dish protect the first bevel gear and the second bevel gear of left and right sides respectively, so, can avoid debris to get into in first bevel gear and the second bevel gear, lead to stopping.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial perspective view of the present invention.

Fig. 3 is a schematic perspective view of the lifting mechanism of the present invention.

Fig. 4 is a schematic view of a first partially-separated body structure of the lifting mechanism of the present invention.

Fig. 5 is a schematic diagram of a second partial body structure of the lifting mechanism of the present invention.

Fig. 6 is a perspective view of the expanding mechanism of the present invention.

Fig. 7 is a schematic perspective view of a portion of the stent of the present invention.

Fig. 8 is a perspective view of the back deployment mechanism of the present invention.

Fig. 9 is an enlarged schematic view of part a of the present invention.

Fig. 10 is a schematic perspective view of a first supporting mechanism according to the present invention.

Fig. 11 is a schematic perspective view of a second supporting mechanism according to the present invention.

Fig. 12 is an enlarged view of part B of the present invention.

Fig. 13 is a partial perspective view of the buffering mechanism of the present invention.

Fig. 14 is a perspective view of the protection mechanism of the present invention.

Fig. 15 is a schematic perspective view of a portion of the shielding mechanism of the present invention.

Wherein: 1-base, 11-rubber cushion block, 2-supporting leg, 3-fixed seat plate, 4-leaning plate, 5-lifting mechanism, 51-fixed seat, 52-stud, 53-servo motor, 54-first column gear, 55-mounting frame, 56-thread plate, 57-vertical rod, 58-sliding ring, 6-expansion mechanism, 61-fixed block, 62-first rotating rod, 63-rotating block, 64-movable seat plate, 65-limiting block, 7-backrest unfolding mechanism, 71-rotating shaft, 72-transmission component, 73-second rotating rod, 74-first bevel gear, 75-rotating backrest, 8-supporting mechanism, 81-mounting block, 82-rotating column, 83-second bevel gear, 84-second column gear, 85-limiting plate, 86-supporting plate, 87-rack, 9-buffer mechanism, 91-contact plate, 92-buffer spring, 10-protection mechanism, 101-connecting block, 102-arc-shaped baffle plate and 103-baffle disc.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Example 1

A lifting adjustable electric sofa seat is shown in figures 1-7 and comprises a base 1, supporting legs 2, a fixed seat plate 3, a backup plate 4, an elevating mechanism 5 and an expansion mechanism 6, wherein the four supporting legs 2 are arranged at the top of the base 1 at intervals, the fixed seat plate 3 is fixedly connected between the tops of the four supporting legs 2, the backup plate 4 is fixedly connected to the rear side of the top of the fixed seat plate 3, the elevating mechanism 5 is arranged between the base 1 and the fixed seat plate 3, the elevating mechanism 5 can achieve convenient lifting adjustment, the expansion mechanism 6 is arranged on the fixed seat plate 3, and the expansion mechanism 6 can achieve convenient seating of multiple persons.

As shown in fig. 1, the device further comprises four rubber cushion blocks 11, and the four rubber cushion blocks 11 are fixedly connected to the bottom of the base 1 at intervals.

As shown in fig. 1-5, the lifting mechanism 5 includes a fixing base 51, a stud 52, a servo motor 53, a first column gear 54, a mounting bracket 55, a threaded plate 56, a vertical rod 57 and a sliding ring 58, the fixing base 51 is fixedly connected to the middle of the top of the base 1, the stud 52 is rotatably disposed on the fixing base 51, the servo motor 53 is fixedly connected to the rear position of the top of the base 1, the first column gear 54 is fixedly connected to the output shaft of the servo motor 53 and the lower portion of the stud 52, the two first column gears 54 are engaged with each other, the mounting bracket 55 is fixedly connected to the middle of the bottom of the fixed seat plate 3, the threaded plate 56 is fixedly connected to the mounting bracket 55, the threaded plate 56 is threadedly connected to the stud 52, the vertical rods 57 are fixedly connected to the middle of the front of the top of the base 1 in a left-right symmetrical manner, the sliding rings 58 are slidably disposed on the vertical rods 57 on the left and right sides, and the sliding rings 58 are fixedly connected to the mounting bracket 55.

As shown in fig. 1, fig. 2, fig. 6 and fig. 7, the expanding mechanism 6 includes a fixed block 61, a first rotating rod 62, a rotating block 63, a movable seat plate 64 and a limiting block 65, the middle parts of the left and right sides of the fixed seat plate 3 are all fixedly connected with the fixed block 61, the fixed block 61 on the left and right sides is provided with the first rotating rod 62 in a rotating manner, the first rotating rod 62 on the left and right sides is fixedly connected with the rotating block 63 in a front-back symmetrical manner, the movable seat plate 64 is fixedly connected between the tops of the two rotating blocks 63 on the left and right sides, the rear side of the bottom of the fixed seat plate 3 is fixedly connected with the limiting block 65 in a left-right symmetrical manner, and the movable seat plates 64 on the left and right sides swing outwards and can be respectively contacted with the limiting blocks 65 on the left and right sides.

When people use the device, people can sit on the fixed seat plate 3, the rubber cushion blocks 11 can prevent the device from moving, the back plate 4 supports the back of people, people can pull the left and right movable seat plates 64 to swing outwards to be in a horizontal state, the left and right limiting blocks 65 respectively limit the left and right movable seat plates 64, so that people can use the device, after the people do not need to use the device, the movable seat plates 64 are pulled to swing inwards to reset to be in a vertical state, when the position of the fixed seat plate 3 needs to be adjusted upwards, the servo motor 53 is started to rotate forwards, the servo motor 53 drives the stud 52 to rotate backwards through the two first column gears 54, the stud 52 rotates backwards to drive the thread plate 56 to move upwards, the thread plate 56 moves upwards to drive the mounting frame 55 to move upwards, the mounting frame 55 moves upwards to drive the fixed seat plate 3 to move upwards, and similarly, when the position of the fixed seat plate 3 needs to be adjusted downwards, then the servo motor 53 is started to rotate reversely, the servo motor 53 rotates reversely to drive the stud 52 to rotate forwardly through the two first column gears 54, the stud 52 rotates forwardly to drive the threaded plate 56 to move downwards, the threaded plate 56 moves downwards to drive the mounting frame 55 to move downwards, the mounting frame 55 moves downwards to drive the fixed seat plate 3 to move downwards, and when the fixed seat plate 3 is adjusted to a proper position, the servo motor 53 is closed.

Example 2

On the basis of embodiment 1, as shown in fig. 1, 8 and 9, the backrest unfolding mechanism 7 is further included, the backrest unfolding mechanism 7 includes a rotating shaft 71, a transmission assembly 72, a second rotating rod 73, a first bevel gear 74 and a rotating backrest 75, the rotating shaft 71 is rotatably disposed in the middle of each of the left and right side limiting blocks 65, the transmission assembly 72 is connected between the rear portion of the left rotating shaft 71 and the rear portion of the left first rotating rod 62, the transmission assembly 72 is connected between the rear portion of the right rotating shaft 71 and the rear portion of the right first rotating rod 62, the transmission assembly 72 is composed of two belt pulleys and a belt, one belt pulley is mounted at the rear portion of the rotating shaft 71, the other belt pulley is mounted at the rear portion of the first rotating rod 62, the belt is wound between the two belt pulleys, the second rotating rods 73 are rotatably disposed on both left and right sides of the backrest plate 4, the first bevel gears 74 are fixedly connected to the lower portions of the left and right first rotating shafts 71 and the rear portions of the second rotating rods 73, the two left first bevel gears 74 are meshed with each other, the two right first bevel gears 74 are meshed with each other, the middle parts of the left and right second rotating rods 73 are fixedly connected with a rotating backrest 75, and the backrest 75 can be rotated to facilitate the backrest of a person sitting on the movable seat plate 64.

As shown in fig. 1, fig. 10, fig. 11 and fig. 12, the supporting mechanism 8 further comprises a supporting mechanism 8, the supporting mechanism 8 comprises an installation block 81, a rotation column 82, a second bevel gear 83, a second bevel gear 84, a limiting plate 85, a supporting plate 86 and a rack 87, the installation block 81 is fixedly connected to the rear side of the bottom of the fixed seat plate 3 in a bilateral symmetry manner, the rotation column 82 is rotatably arranged on the side of the left side and the right side of the installation block 81 away from each other, the second bevel gear 84 is fixedly connected to the upper part of the left side and the right side of the rotation column 82, the second bevel gear 83 is fixedly connected to the lower part of the left side and the right side of the rotation column 82 and the front part of the left side and the right side of the rotation shaft 71, the left two second bevel gears 83 are meshed with each other, the limiting plate 85 is fixedly connected to the front side of the bottom of the fixed seat plate 3 in a bilateral symmetry manner, the supporting plate 86 is slidably arranged in the limiting plates 85 on the left side and the left side, the supporting plate 86 can further support the movable seat plate 64, the left and right movable seat plates 64 swing outward to be respectively contacted with the left and right support plates 86, the racks 87 are arranged at the rear parts of the left and right limit plates 85 in a sliding mode, the left support plate 86 is fixedly connected with the left rack 87, the right support plate 86 is fixedly connected with the right rack 87, the left rack 87 is meshed with the left second column gear 84, and the right rack 87 is meshed with the right second column gear 84.

As shown in fig. 1 and 13, the seat cushion mechanism 9 further includes a buffer mechanism 9, the buffer mechanism 9 includes a contact plate 91 and buffer springs 92, the contact plate 91 is slidably disposed on the side of the left and right support plates 86 away from each other, the contact plate 91 can buffer the movable seat plate 64, the left and right movable seat plates 64 swing outward to be respectively in contact with the left and right contact plates 91, and four buffer springs 92 are fixedly connected between the left and right contact plates 91 and the left and right support plates 86 at regular intervals.

As shown in fig. 1, 14 and 15, the seat cushion further comprises a protection mechanism 10, the protection mechanism 10 comprises a connecting block 101, an arc-shaped baffle plate 102 and a baffle disc 103, the rear lower part of the outer side surface of the left and right movable seat plate 64 is fixedly connected with the two connecting blocks 101, the arc-shaped baffle plate 102 is fixedly connected between the lower parts of the two connecting blocks 101 on the left, the arc-shaped baffle plate 102 is also fixedly connected between the lower parts of the two connecting blocks 101 on the right, and the baffle disc 103 is fixedly connected to the rear part of the arc-shaped baffle plate 102 on the left and right.

When the left and right movable seat plates 64 are pulled to swing outwards, the left and right movable seat plates 64 swing outwards to respectively drive the left and right first rotating rods 62 to rotate, the left and right first rotating rods 62 rotate to respectively drive the left and right transmission assemblies 72 to rotate, the left and right transmission assemblies 72 rotate to respectively drive the left and right rotating shafts 71 to rotate, the left and right rotating shafts 71 rotate to respectively drive the left and right second rotating rods 73 to rotate through the left and right first bevel gears 74, the left and right second rotating rods 73 rotate to respectively drive the left and right rotating backrests 75 to swing outwards, so that the left and right rotating backrests 75 respectively support the back of people sitting on the left and right movable seat plates 64, when the left and right movable seat plates 64 swing inwards, the left and right movable seat plates 64 swing inwards to respectively drive the left and right first rotating rods 62 to rotate and reset, and the left and right rotating backrests 75 also swing inwards respectively, thus, the back support of the person sitting on the movable seat plate 64 can be facilitated.

When the left and right movable seats 64 are pulled to swing outwards, the left and right rotating shafts 71 rotate to respectively drive the left and right rotating posts 82 to rotate through the left and right second bevel gears 83, the left and right rotating posts 82 rotate to respectively drive the left and right second bevel gears 84 to rotate, the left and right second bevel gears 84 rotate to respectively drive the left and right racks 87 to move outwards, the left and right racks 87 move outwards to respectively drive the left and right supporting plates 86 to move outwards, the left and right supporting plates 86 move outwards to respectively support the left and right movable seats 64, and when an operator respectively pulls the left and right movable seats 64 to swing inwards, the left and right supporting plates 86 move inwards to reset.

When the left and right support plates 86 move outward, the left and right support plates 86 move outward to drive the left and right contact plates 91 to move outward, so that the left and right movable seat plates 64 swing outward to be in horizontal state and are respectively in contact with the left and right sides, the left and right contact plates 91 buffer the left and right movable seat plates 64 through the left and right four buffer springs 92, and then when the left and right support plates 86 move inward, the left and right support plates 86 move outward to drive the left and right contact plates 91 to move inward to reset, so that the left and right movable seat plates 64 can be buffered respectively.

When people use the device, the left arc baffle plate 102 and the right arc baffle plate 103 respectively protect the first bevel gear 74 and the second bevel gear 83 on the left side and the right side, so that sundries are prevented from entering the first bevel gear 74 and the second bevel gear 83, and the sundries can be prevented from entering the first bevel gear 74 and the second bevel gear 83 to cause stopping.

While the disclosure has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (8)

1. The utility model provides a liftable adjust electric sofa seat, including base (1), landing leg (2), fixed seat (3) and backup plate (4), four landing legs (2) have been placed at base (1) top interval, the rigid coupling has fixed seat (3) between four landing legs (2) tops, fixed seat (3) top rear side rigid coupling has backup plate (4), a serial communication port, still including elevating system (5) and expanding mechanism (6), be equipped with elevating system (5) that are used for lift adjustment between base (1) and fixed seat (3), be equipped with on fixed seat (3) and be used for making things convenient for many people to sit upright expanding mechanism (6).

2. The liftable electric sofa seat according to claim 1, wherein the lifting mechanism (5) comprises a fixed seat (51), a stud (52), a servo motor (53), a first column gear (54), a mounting frame (55), a thread plate (56), a vertical rod (57) and a sliding ring (58), the fixed seat (51) is fixedly connected to the middle of the top of the base (1), the stud (52) is rotatably arranged on the fixed seat (51), the servo motor (53) is fixedly connected to the rear side of the top of the base (1), the first column gear (54) is fixedly connected to the lower portion of the stud (52) and the output shaft of the servo motor (53), the two first column gears (54) are meshed with each other, the mounting frame (55) is fixedly connected to the middle of the bottom of the fixed seat plate (3), the thread plate (56) is fixedly connected to the mounting frame (55), and the thread plate (56) is in threaded connection with the stud (52), upright rods (57) are symmetrically and fixedly connected in the left and right directions in the middle of the front side of the top of the base (1), sliding rings (58) are arranged on the upright rods (57) on the left side and the right side in a sliding mode, and the sliding rings (58) on the left side and the right side are fixedly connected with a mounting frame (55).

3. The liftable electric sofa seat as claimed in claim 2, wherein the expansion mechanism (6) comprises a fixed block (61), a first rotating rod (62), a rotating block (63), a movable seat plate (64) and a limiting block (65), the fixed block (61) is fixedly connected to the middle of the left side and the right side of the fixed seat plate (3), the first rotating rod (62) is rotatably arranged on the fixed block (61) on the left side and the right side, the rotating block (63) is fixedly connected to the first rotating rod (62) on the left side and the right side in a front-back symmetrical manner, the movable seat plate (64) is fixedly connected between the tops of the two rotating blocks (63) on the left side and the right side, the limiting block (65) is fixedly connected to the left side and the right side of the bottom of the fixed seat plate (3) in a left-right symmetrical manner, and the movable seat plates (64) on the left side and the right side can swing outwardly to contact with the limiting blocks (65) on the left side and the right side respectively.

4. The liftable electric sofa chair according to claim 3, further comprising a backrest unfolding mechanism (7) for facilitating backrest for multiple people, wherein the backrest unfolding mechanism (7) comprises a rotating shaft (71), a transmission assembly (72), a second rotating rod (73), a first bevel gear (74) and a rotating backrest (75), the rotating shaft (71) is rotatably arranged in the middle of the left and right limiting blocks (65), the transmission assembly (72) is connected between the rear part of the left rotating shaft (71) and the rear part of the left first rotating rod (62), the transmission assembly (72) is connected between the rear part of the right rotating shaft (71) and the rear part of the right first rotating rod (62), the transmission assembly (72) comprises two belt pulleys and a belt, one belt pulley is mounted at the rear part of the rotating shaft (71), the other belt pulley is mounted at the rear part of the first rotating rod (62), and the belt is wound between the two belt pulleys, the left side and the right side of the backup plate (4) are all rotatably provided with second rotating rods (73), the lower parts of the left side and the right side of the first rotating shafts (71) and the rear parts of the left side and the right side of the second rotating rods (73) are fixedly connected with first bevel gears (74), the left two first bevel gears (74) are mutually meshed, the right two first bevel gears (74) are mutually meshed, and the middle parts of the left side and the right side of the second rotating rods (73) are fixedly connected with rotating backrests (75) which are used for enabling a plurality of people to carry out backrests.

5. The liftable electric sofa seat according to claim 4, further comprising a supporting mechanism (8) for further supporting the movable seat plate (64), wherein the supporting mechanism (8) comprises mounting blocks (81), rotating columns (82), second bevel gears (83), second bevel gears (84), limiting plates (85), supporting plates (86) and racks (87), the mounting blocks (81) are symmetrically fixedly connected to the rear side of the bottom of the fixed seat plate (3) in the left-right direction, the rotating columns (82) are rotatably arranged on the sides of the left-right side mounting blocks (81) far away from each other, the second bevel gears (84) are fixedly connected to the upper portions of the left-right side rotating columns (82), the second bevel gears (83) are fixedly connected to the lower portions of the left-right side rotating columns (82) and the front portions of the left-right side rotating shafts (71), the left-left two bevel gears (83) are meshed with each other, the right-right two bevel gears (83) are meshed with each other, fixed seat (3) bottom front side bilateral symmetry rigid coupling has limiting plate (85), all slidingtype are equipped with backup pad (86) that are used for further supporting movable seat (64) in left and right sides limiting plate (85), left and right sides movable seat (64) outwards swing respectively can contact with left and right sides backup pad (86), left and right sides limiting plate (85) rear portion all slidingtype is equipped with rack (87), left backup pad (86) and left rack (87) fixed connection, right backup pad (86) and right rack (87) fixed connection, left rack (87) and left second rack gear (84) meshing, right rack (87) and right second rack gear (84) meshing.

6. The liftable electric sofa chair according to claim 5, further comprising a buffer mechanism (9) for buffering the movable seat plate (64), wherein the buffer mechanism (9) comprises a contact plate (91) and buffer springs (92), the contact plate (91) for buffering the movable seat plate (64) is slidably arranged on the side, away from each other, of the outer portion of each of the left and right side support plates (86), the left and right side movable seat plates (64) swing outwards and can be respectively in contact with the left and right side contact plates (91), and the left and right side contact plates (91) and the left and right side support plates (86) are respectively fixedly connected with four buffer springs (92) at uniform intervals.

7. The electric sofa seat capable of being adjusted in a lifting mode according to claim 6, characterized by further comprising a protection mechanism (10) used for protecting the first bevel gear (74) and the second bevel gear (83), wherein the protection mechanism (10) comprises connecting blocks (101), arc-shaped baffles (102) and baffle discs (103), the rear lower portions of the outer side surfaces of the left side and the right side of the movable seat plates (64) are fixedly connected with the two connecting blocks (101), the arc-shaped baffles (102) are fixedly connected between the lower portions of the two connecting blocks (101) on the left side, the arc-shaped baffles (102) are fixedly connected between the lower portions of the two connecting blocks (101) on the right side, and the baffle discs (103) are fixedly connected to the rear portions of the arc-shaped baffles (102) on the left side and the right side.

8. The electric sofa seat capable of being adjusted in a lifting mode according to claim 7, further comprising four rubber cushion blocks (11), wherein the four rubber cushion blocks (11) are fixedly connected to the bottom of the base (1) at intervals.

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