CN220403569U

CN220403569U - Electric couch with lifting and lying functions

Info

Publication number: CN220403569U
Application number: CN202321466077.9U
Authority: CN
Inventors: 沃特贝克
Original assignee: Hobe Intellectual Property Management Co ltd
Current assignee: Hobe Intellectual Property Management Co ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2024-01-30
Anticipated expiration: 2033-06-08

Abstract

The utility model discloses an electric sofa chair with lifting and lying functions, which comprises a U-shaped base, a fixed component, a movable component, a connecting rod, a first electric push rod, a second electric push rod and an armrest frame, wherein the U-shaped base is provided with a first seat and a second seat; the front end of the U-shaped base is hinged with a base connecting plate which is fixedly connected with the armrest frame; the fixing component comprises a front fixing frame, a rear fixing frame and a seat board fixing frame connected with the armrest frame; the bottom of the first electric push rod is hinged with the U-shaped base, the telescopic end of the first electric push rod is hinged with the base fixing frame, and the first electric push rod is started to drive the base fixing frame to be far away from or close to the U-shaped base; a movable assembly foot rest and a chair back frame; the bottom of the second electric push rod is hinged with the seat board fixing frame, and the telescopic end of the second electric push rod is hinged with the chair back frame; the second electric push rod is started to drive the back rest frame to rotate relative to the hinge point of the back rest frame, and the foot rest frame is driven to rotate relative to the hinge point of the back rest frame under the transmission of the connecting rod; so as to simultaneously meet different use requirements of users on the lifting and lying of the sofa.

Description

Electric couch with lifting and lying functions

Technical Field

The utility model relates to a sofa, in particular to a sofa chair capable of being lifted and lying down. The sofa chair can perform lifting and lying functions at the same time, wherein the lifting function is to drive the sofa to adjust to a posture with low front and high rear so as to assist the elderly and other people with mobility difficulties to rise and sit down on the sofa; the lying function means that the couch can be used in sitting and lying postures, and the couch comprises an adjustable chair back and leg rest parts for supporting legs, and different sitting and lying postures of a user are met by adjusting the inclination angles of the chair back and the leg rest parts.

Background

The couch is a furniture for home use, and the seat and the backrest which are wide, comfortable and flexible can reliably support the human body, so that people can rest in comfortable postures such as lying, sitting and the like, and the couch is popular with modern living residents.

The utility model provides a liftable sofa of bulletin number CN218922162U, includes back, cushion and four stabilizer blades, and the below of cushion is provided with the backup pad, is provided with a plurality of electric putter in the backup pad, drives back and cushion vertical motion through electric putter control backup pad to make the height of cushion can adjust.

The utility model provides an automatic lifting structure of sofa that publication number is CN114601288A, is provided with the direction locating sleeve that extends from top to bottom on the upper surface including base, lifter circumference spacing circumference ability movable fit in the direction locating sleeve, and the motor end in the electric putter is fixed in the lower extreme of base or direction locating sleeve, and the push rod end and the lifter of electric putter are connected to drive the lifter and reciprocate in the direction locating sleeve.

The two kinds of sofas can only realize lifting in the height direction, but can not realize the lying function of the sofa, namely, the sofa can not be switched to be used in a sitting posture and a lying posture state.

An intelligent sofa intelligent lifting driving system of CN115067708A comprises a bottom plate, a lifting mechanism fixedly connected with the center of the top of the bottom plate, a transverse panel rotatably connected with the top of the lifting mechanism, a lower bending panel and an upper bending panel rotatably connected with the two ends of the transverse panel respectively, and an angle adjusting mechanism arranged at the bottom of the upper bending panel.

The sofa can realize lifting control of the whole sofa main body, so that lifting driving of the intelligent sofa is realized, and linkage capacity of the whole sofa in angle height change is improved.

The whole control system of the sofa has the problems of large occupied area, heavy weight and inconvenient operation.

Disclosure of Invention

In view of the technical problems of the prior art, the utility model provides a sofa which occupies a small volume, is relatively light and convenient to operate and can be lifted and reclined.

The technical scheme adopted for solving the technical problems is as follows: an electric couch with lifting and lying functions comprises a U-shaped base, a fixed component, a movable component, at least one connecting rod, a first electric push rod, a second electric push rod and two armrest frames;

the U-shaped base comprises two base vertical rods and a base cross rod, a base reinforcing rod is arranged between the two base vertical rods, and the free ends of the two base vertical rods are hinged with a base connecting plate; the base connecting plate is fixedly arranged on the armrest frame;

the fixing component comprises a front fixing frame, a rear fixing frame and a seat plate fixing frame, wherein the front fixing frame and the rear fixing frame are connected with the armrest frame, and the seat plate fixing frame is connected with the seat plate;

the seat board fixing frame is connected with a seat board reinforcing rod;

the bottom of the first electric push rod is hinged to the base reinforcing rod, and the telescopic end of the first electric push rod is hinged to the seat plate reinforcing rod;

the movable component comprises a foot rest hinged at the front end of the seat plate fixing frame and a chair back frame hinged at the rear end of the seat plate fixing frame; one end of the connecting rod is hinged to the lower end of the chair back frame, and the other end of the connecting rod is hinged to the upper end of the foot rest frame;

the bottom of the second electric push rod is hinged to the rear end of the seat plate fixing frame, and the telescopic end of the second electric push rod is hinged to the lower end of the seat back frame.

The further preferable technical scheme of the utility model is as follows: the seat board reinforcing rod is fixed at the rear and lower side of the seat board fixing frame through a first connecting sheet;

so that the rear side position of the fixing assembly is lifted by the first electric putter.

The further preferable technical scheme of the utility model is as follows: the front fixing frame, the rear fixing frame and the seat plate fixing frame in the fixing assembly are all rectangular, and square tubes are adopted;

the foot rest, the chair back frame and the connecting rod assembly in the movable assembly adopt round tubes.

The further preferable technical scheme of the utility model is as follows: and a cushion block is arranged on the upper side of the base cross rod, and the rear fixing frame can be supported on the cushion block.

The further preferable technical scheme of the utility model is as follows: the chair back frame and the foot rest are driven by a first connecting rod and a second connecting rod;

the first connecting rod and the second connecting rod are arranged in parallel, one ends of the first connecting rod and the second connecting rod are hinged to the lower end of the chair back frame, and the other ends of the first connecting rod and the second connecting rod are both hinged to the upper portion of the foot rest frame.

The further preferable technical scheme of the utility model is as follows: the first electric push rod is connected with a first switch, and the first switch is arranged on the inner side of the first handrail;

the second electric push rod is connected with a second switch, and the second switch is arranged on the inner side of the second handrail.

The further preferable technical scheme of the utility model is as follows: the chair back frame comprises a bottom rod, a top rod and two vertical rods, and a chair back reinforcing rod is arranged between the two vertical rods;

the seat back reinforcement bar is axially connected to the rear bar of the seat plate fixing frame.

The further preferable technical scheme of the utility model is as follows: the upper end of the base connecting plate is fixed on the inner side of the armrest frame through a screw assembly;

the free ends of the two base vertical rods are hinged to the lower ends of the base connecting plates.

Another subject is: an electric couch with lifting and lying functions comprises a U-shaped base, a fixed component, a movable component, at least one connecting rod, a first electric push rod, a second electric push rod and two armrest frames;

the rear part of the U-shaped base is provided with a base reinforcing rod, the front end of the U-shaped base is hinged with a base connecting plate, and the base connecting plate is fixedly connected with the armrest frame;

the seat board fixing frame is connected with a seat board reinforcing rod;

The further preferable technical scheme of the utility model is as follows: the U-shaped base comprises two base vertical rods and a base cross rod, the rear parts of the two base vertical rods are connected with a base reinforcing rod, and the base reinforcing rod is parallel to the base cross rod; the free ends of the two base vertical rods are hinged with the base connecting plates.

the foot rest, the chair back frame and the connecting rod assembly in the movable assembly adopt round tubes;

the front fixing frame and the rear fixing frame are longitudinally arranged and positioned at the front side and the rear side of the transversely arranged seat board fixing frame;

the foot rest is unfolded and then is on the same plane with the seat board fixing frame, and the foot rest is folded and then is positioned on the outer side of the front fixing frame.

The further preferable technical scheme of the utility model is as follows: the seat board reinforcing rod is fixed at the rear and lower side positions of the seat board fixing frame through the first connecting sheets;

The further preferable technical scheme of the utility model is as follows: a cushion block is arranged on the upper side of the base cross rod, and the rear fixing frame can be supported on the cushion block;

cushion blocks are arranged on the lower side of the base cross rod and the lower side of the front end of the base vertical rod.

the first connecting rod and the second connecting rod are arranged in parallel, one ends of the first connecting rod and the second connecting rod are hinged to the lower end of the chair back frame, and the other ends of the first connecting rod and the second connecting rod are both hinged to the upper part of the foot rest frame;

the upper portion both sides of putting the foot rest are provided with the horizontal quarter butt, the other end of first, second connecting rod is articulated with corresponding horizontal quarter butt respectively.

the chair back reinforcing rod is provided with a shaft joint sheet, the rear rod of the seat plate fixing frame is provided with a shaft joint lug, and the shaft joint sheet is mutually connected with the shaft joint lug in a shaft joint mode.

the free ends of the two base vertical rods are hinged to the lower ends of the base connecting plates;

the front end and the rear end of the armrest frame are respectively provided with supporting feet.

Compared with the prior art, the electric sofa has the advantages that the electric sofa comprises the U-shaped base, the fixed component and the movable component. Wherein, a part of the fixed component is in shaft connection with the U-shaped base, so that the sofa main body can be lifted forwards and upwards based on the shaft connection point to be used as a posture for guiding a person who enters the seat to leave the seat, thereby ensuring that users, including pregnant women, old people and people with mobility impairment, are more comfortable and convenient to use.

Further, the movable components are distributed along the front and back of the sofa main body, and when the movable components are unfolded, the front and back length of the sofa can be expanded so that a user can lie down. Namely, the sofa can adjust the pitching angle so as to meet the lying requirements of different postures of users.

Wherein, fixed subassembly passes through first electric putter drive, and movable subassembly passes through the second electric putter drive, and every electric putter corresponds different drive switch to the user can each independently drive corresponding switch, then satisfies corresponding user demand.

Drawings

The utility model will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the utility model. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.

FIG. 1 is a schematic view of the overall structure of an electric couch;

FIG. 2 is a schematic view of an expanded state of the electric couch;

FIG. 3 is a schematic view of the electric couch tilted up;

FIG. 4 is a schematic view of the internal structure of the electric sofa chair;

FIG. 5 is a second schematic view of the internal structure of the electric sofa;

FIG. 6 is a third schematic view of the internal structure of the electric couch;

FIG. 7 is a schematic diagram of a structure of a fixed assembly and a movable assembly;

fig. 8 is a schematic structural diagram of the fixed component and the movable component.

Detailed Description

Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative, exemplary, and should not be construed as limiting the scope of the utility model.

It should be noted that: like reference numerals denote like items in the following figures, and thus once an item is defined in one figure, it may not be further defined and explained in the following figures.

As shown in fig. 1 to 3, the electric couch 100 is schematically shown in structure, and the backrest and the support legs of the electric couch 100 can be unfolded and folded to meet different use requirements of users. In addition, the chair body of the electric couch 100 may be lifted up and tilted outward based on its hinge point to make a posture guiding the user outward away from the seat.

As shown in fig. 4 to 6, the electric couch 100 having both lifting and lying functions includes a U-shaped base 10, a fixed assembly 20, a movable assembly 30, a link 40, a first electric push rod 51, a second electric push rod 52, and two armrest frames 101.

The movable assembly 30 comprises a foot rest 31 and a chair back 32, and the foot rest 31 and the chair back 32 are unfolded outwards to meet the use requirement of the chair for lying; the foot rest 31 and the chair back 32 are folded inwards to meet the use requirement that a user can stably seat.

The fixing component 20 is a main body supporting frame of the sofa, and the fixing component 20 can rotate around the hinge point of the fixing component and the U-shaped base 10 so as to lift upwards and tilt outwards, so that a user can conveniently leave from the base body. The user can sit comfortably and spaciously, and the lifting action is convenient for the user to leave the seat.

Further, the U-shaped base 10 of the present utility model includes two base vertical bars 11 and a base cross bar 12, and a base reinforcing bar 17 is disposed between the two base vertical bars 11 to enhance the stability of the base.

The free ends of the two base vertical rods 11, namely the front ends of the base vertical rods 11 (the direction of the seat entrance) are hinged with base connecting plates 14.

The base connection plate 14 is fixedly mounted on the armrest frame 101. And the fixing assembly 20 includes a front fixing frame 21 connected to the armrest frame 101, a rear fixing frame 22, and a seat plate fixing frame 23 connected to the seat plate.

Preferably, the seat plate fixing frame 23 is connected with a seat plate reinforcing rod 24 to further strengthen the stability of the seat plate fixing frame 23.

As shown in fig. 7 and 8, the bottom of the first electric putter 51 is hinged to the base reinforcement bar 17, and the telescopic end of the first electric putter 51 is hinged to the seat plate reinforcement bar 24.

The hinge structure of the electric push rod and the corresponding component needs to be described, namely, the hinge structure of the telescopic end of the first electric push rod 51 and the reinforcing rod comprises connecting pieces which are arranged in parallel at intervals of the outer edges of the telescopic end, the corresponding reinforcing rod is provided with a U-shaped hinge seat, and the connecting pieces are placed in U-shaped openings of the U-shaped hinge seat; and at this time, the two side walls of the U-shaped hinging seat are placed on the steps at the two sides of the connecting sheet.

Further, the movable assembly 30 includes a foot rest 31 hinged to the front end of the seat plate holder 23 and a seat back rest 32 hinged to the rear end of the seat plate holder 23.

One end of the link 40 is hinged to the lower end of the back rest 32, and the other end of the link 40 is hinged to the upper end of the foot rest 31. Links 40 are arranged on both sides of the back rest 32 and the foot rest 31 to ensure a stable driving relationship between the back rest 32 and the foot rest 31.

The bottom of the second electric push rod 52 is hinged at the rear end of the seat plate fixing frame 23, and the telescopic end of the second electric push rod 52 is hinged at the lower end of the seat back frame 32.

The hinge structure between the telescopic end of the second electric push rod 52 and the chair back frame 32 comprises two connecting pieces which extend outwards from the telescopic end and are separated by a certain distance; the outer surface of the connecting piece is arc-shaped so as to be consistent and unified with the outer wall of the push rod with the circular section.

The electric sofa has the advantages that the electric sofa comprises the U-shaped base 10, the fixed component 20 and the movable component 30. Wherein, a part of the fixing component 20 is in shaft connection with the U-shaped base 10, so that the sofa main body can be lifted forwards and upwards based on the shaft connection point to serve as a posture for guiding a person who is seated to leave the seat, thereby ensuring that the user, including pregnant women, old people and people with mobility impairment, is more comfortable and convenient to use.

Further, the movable components 30 are disposed along the front and rear of the sofa body, and when the movable components are unfolded, the front and rear lengths of the sofa can be expanded for the user to lie down. Namely, the sofa can adjust the pitching angle so as to meet the lying requirements of different postures of users.

Wherein, fixed subassembly 20 passes through first electric putter 51 drive, and movable subassembly 30 passes through the drive of second electric putter 52, and every electric putter corresponds different drive switch to the user can each independently drive corresponding switch, then satisfies corresponding user demand.

Preferably, the seat plate reinforcing bar 24 in the present embodiment is fixed at a rear and lower side position of the seat plate fixing frame 23 by the first connection piece v; so as to raise the rear side position of the fixed assembly 20 by the first electric push rod 51.

The first connection piece v extends downward a distance, and the seat plate reinforcing bar 24 is fixedly connected to the lower end of the first connection piece v. So that the hinged end of the first electric push rod 51 is vertically offset from the seating surface area of the sofa.

Preferably, the front fixing frame 21, the rear fixing frame 22 and the seat plate fixing frame 23 of the fixing assembly 20 are rectangular, and square tubes are adopted. The foot rest 31, the chair back 32 and the connecting rod 40 in the movable assembly 30 are round tubes.

Further preferably, the upper side of the base rail 12 in this embodiment is provided with a pad t, and the rear mount 22 may be supported on the pad t.

The chair back frame 32 and the foot rest frame 31 are transmitted through the first connecting rod and the second connecting rod, so that the stability and the flexibility of transmission are ensured.

Preferably, the first link 41 and the second link 42 are disposed in parallel, and one ends of the first link 41 and the second link 42 are hinged to the lower end of the back frame 32, and the other ends of the first link and the second link are both hinged to the upper position of the foot rest 31.

The first electric push rod 51 is connected with a first switch k1, and the first switch k1 is installed on the inner side of the first armrest 101 a; the second electric putter 52 is connected to a second switch k2, and the second switch k2 is mounted inside the second armrest 101 b. The two switches independently control the corresponding push rods, so that the conflict of the two functions is avoided.

The back frame 32 comprises a bottom rod c2, a top rod c1 and two vertical rods c3, and a back reinforcement rod c4 is further arranged between the two vertical rods c3 to strengthen the stability of the back frame 32. The chair back reinforcing rod c4 is connected with the rear rod of the seat plate fixing frame 23 in a shaft way so as to meet the mechanical requirement that the chair back reinforcing rod c4 and the seat plate fixing frame can rotate relatively.

Preferably, the upper end of the base connection plate 14 is fixed to the inner side of the armrest frame 101 by a screw assembly; the free ends of the two base vertical rods 11 are hinged at the lower ends of the base connecting plates 14.

Further, a base reinforcing rod 17 is arranged at the rear part of the U-shaped base 10, a base connecting plate 14 is hinged at the front end of the U-shaped base 10, and the base connecting plate 14 is fixedly connected with the armrest frame 101; and the free ends of the two base vertical rods 11 are hinged with base connecting plates 14. Therefore, the seat body can be outwards rotated based on the hinge point, so that the seat body is lifted, and a user can leave the seat conveniently.

The front fixing frame 21 and the rear fixing frame 22 are longitudinally arranged and positioned at the front side and the rear side of the seat plate fixing frame 23 which is transversely arranged. The foot rest 31 is unfolded and then is on the same plane with the seat plate fixing frame 23, and when the foot rest 31 is folded, the foot rest 31 is folded and then is positioned outside the front fixing frame 10.

Preferably, the seat plate reinforcing bar 24 is fixed at a rear and lower side position of the seat plate fixing frame 23 by a first connection piece v; so as to raise the rear side position of the fixed assembly 10 by the first electric push rod 51.

A cushion block t is mounted on the upper side of the base rail 12, and a rear fixing frame 22 can be supported on the cushion block t. And preferably, a cushion block t is arranged on the lower side of the base cross bar 12 and the lower side of the front end of the base vertical bar 11.

Further preferably, the two sides of the upper part of the foot rest 31 are provided with transverse short rods r, and the other ends of the first and second connecting rods are respectively hinged with the corresponding transverse short rods r. The transverse short rod r is arranged to adjust the position relationship between the front end and the rear end of the connecting rod 40, so as to ensure that the two are on the same straight line, thereby facilitating the transmission of the transmission relationship.

Further, the seat back reinforcement bar c4 is provided with a shaft tab e1, and the rear bar of the seat board fixing frame 23 is provided with a shaft tab e2, and the shaft tab e1 and the shaft tab e2 are mutually connected in a shaft manner.

In addition, support legs P are provided at both front and rear ends of the armrest frame 101 to ensure the placement stability of the sofa itself. Preferably, the support leg P is a plastic leg.

The electric couch with both lifting and lying functions provided by the utility model is described in detail above, and specific examples are applied to illustrate the principles and embodiments of the utility model, and the description of the examples is only used for helping to understand the utility model and core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. Electric couch with lifting and lying functions, characterized in that: comprises a U-shaped base, a fixed component, a movable component, at least one connecting rod, a first electric push rod, a second electric push rod and two handrail frames;

the seat board fixing frame is connected with a seat board reinforcing rod;

2. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the seat board reinforcing rod is fixed at the rear and lower side of the seat board fixing frame through a first connecting sheet;

3. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the front fixing frame, the rear fixing frame and the seat plate fixing frame in the fixing assembly are all rectangular, and square tubes are adopted;

4. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

and a cushion block is arranged on the upper side of the base cross rod, and the rear fixing frame can be supported on the cushion block.

5. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the chair back frame and the foot rest are driven by a first connecting rod and a second connecting rod;

6. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the first electric push rod is connected with a first switch, and the first switch is arranged on the inner side of the first handrail;

7. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the chair back frame comprises a bottom rod, a top rod and two vertical rods, and a chair back reinforcing rod is arranged between the two vertical rods;

8. The electric sofa chair with lifting and lying functions according to claim 1, characterized in that:

the upper end of the base connecting plate is fixed on the inner side of the armrest frame through a screw assembly;

9. Electric couch with lifting and lying functions, characterized in that: comprises a U-shaped base, a fixed component, a movable component, at least one connecting rod, a first electric push rod, a second electric push rod and two handrail frames;

the front end of the U-shaped base is hinged with a base connecting plate which is fixedly connected with the armrest frame;

the bottom of the first electric push rod is hinged with the U-shaped base, the telescopic end of the first electric push rod is hinged with the seat board fixing frame, and the first electric push rod is started to drive the seat board fixing frame to be far away from or close to the U-shaped base;

the movable component comprises a foot rest hinged at the front end of the seat plate fixing frame and a chair back frame hinged at the rear end of the seat plate fixing frame; two ends of the connecting rod are respectively connected with the chair back frame and the foot rest frame;

the bottom of the second electric push rod is hinged with the seat plate fixing frame, and the telescopic end of the second electric push rod is hinged with the seat back frame; the second electric push rod is started to drive the chair back frame to rotate relative to the hinge point of the chair back frame, and drives the foot rest frame to rotate relative to the hinge point of the chair back frame under the transmission of the connecting rod.

10. The electric couch with both lifting and lying functions of claim 9, wherein:

a base reinforcing rod is arranged at the rear part of the U-shaped base, and the base plate reinforcing rod is connected to the base plate fixing frame;

one end of the connecting rod is hinged to the lower end of the chair back frame, and the other end of the connecting rod is hinged to the upper end of the foot rest frame;

the second electric push rod is hinged at the rear end of the seat board fixing frame, and the telescopic end of the second electric push rod is hinged at the lower end of the seat back frame;

the U-shaped base comprises two base vertical rods and a base cross rod, the rear parts of the two base vertical rods are connected with a base reinforcing rod, and the base reinforcing rod is parallel to the base cross rod;

the free ends of the two base vertical rods are hinged with the base connecting plates.

11. The electric couch with both lifting and lying functions of claim 9, wherein: the front fixing frame, the rear fixing frame and the seat plate fixing frame in the fixing assembly are all rectangular, and square tubes are adopted;

12. The electric couch with both lifting and lying functions of claim 10, wherein:

the seat board reinforcing rod is fixed at the rear and lower side positions of the seat board fixing frame through the first connecting sheets;

13. The electric couch with both lifting and lying functions of claim 10, wherein: a cushion block is arranged on the upper side of the base cross rod, and the rear fixing frame can be supported on the cushion block;

14. The electric couch with both lifting and lying functions of claim 9, wherein:

15. The electric couch with both lifting and lying functions of claim 9, wherein:

16. The electric couch with both lifting and lying functions of claim 9, wherein:

the chair back frame comprises a bottom rod, a top rod and two vertical rods, and a chair back reinforcing rod is arranged between the two vertical rods; the chair back reinforcing rod is provided with a shaft joint sheet, the rear rod of the seat plate fixing frame is provided with a shaft joint lug, and the shaft joint sheet is mutually connected with the shaft joint lug in a shaft joint mode.

17. The electric couch with both lifting and lying functions of claim 10, wherein: