CN115813140A - Sofa with adjustable sitting posture - Google Patents

Abstract

The invention relates to the technical field of furniture, in particular to a sofa with adjustable sitting posture. The invention provides a sofa with adjustable sitting posture, which is convenient to adjust the sitting posture and has higher comfort. The invention provides a sofa with adjustable sitting posture, which comprises a bracket, a cushion, armrests, a supporting plate and the like; the support top is connected with the cushion, and the support top is connected with two handrails that are used for placing the hand, and two handrails are located the cushion outside, and the inside slidingtype of support is connected with two backup pads that are used for placing the shank. Operating personnel can make things convenient for operating personnel to place the both legs on placing the board through pulling the backup pad forward with sealing plug and fixed frame separation, can make the cushion rotate, and then conveniently adjusts operating personnel's back lean on the angle, and then through the first slide bar of backward pulling, can make things convenient for operating personnel to place the both legs, and then improve the travelling comfort that operating personnel used this device.

Description

Sofa with adjustable sitting posture

Technical Field

The invention relates to the technical field of furniture, in particular to a sofa with adjustable sitting posture.

Background

The sofa is necessary for many families, and the sofa mainly comprises a low-back sofa, a high-back sofa and a common sofa between the low-back sofa and the high-back sofa, and people need the sofa with convenient use and sitting posture adjustment in order to improve the comfort of using the sofa.

Patent with patent grant publication number CN213344993U, discloses an office sofa with adjustable sitting posture, which comprises: a sofa bottom plate; the two sofa armrests are provided, wherein a transmission cavity is formed in each of the two sofa armrests; sofa backrest, sofa backrest both ends are close to central end fixedly connected with dwang, dwang one end extends to the inside and outside fixed mounting of transmission cavity and has driven gear. Although this patent is through starting drive gear the angle of leaning on of adjustable sofa back, this patent is not convenient for place the foot, and then makes people be inconvenient for adjust the position of sitting at will to the travelling comfort when reducing people's use.

Therefore, a sofa with adjustable sitting posture, which is convenient for adjusting the sitting posture and has higher comfort, needs to be designed.

Disclosure of Invention

In order to overcome the defects that the prior art is not convenient for placing feet and further people are not convenient for randomly adjusting the sitting posture, the technical problem to be solved is that: the utility model provides a sitting posture adjustable sofa which is convenient for adjusting the sitting posture and has higher comfort.

The technical scheme of the invention is as follows: the utility model provides a position of sitting adjustable sofa, including support, cushion, handrail and backup pad, the support top is connected with the cushion, and the support top is connected with two handrails that are used for placing the hand, and two handrails are located the cushion outside, and support inside slidingtype is connected with two backup pads that are used for placing the shank, still including adjustment mechanism and supporting mechanism, and support middle part right side is equipped with the adjustment mechanism who is used for adjusting back and leans on the angle, and the inside rear side of support is equipped with the supporting mechanism who is used for placing the shank.

As the improvement of above-mentioned scheme, adjustment mechanism is including first link, fixed frame, the movable rod, the sealing plug, dwang and cushion, the support right part is connected with two first links, be connected with fixed frame between two first links, the sliding type is connected with the movable rod behind the fixed frame, fixed frame front side joint has the sealing plug, the sealing plug is used for sealing up fixed frame, support rear portion rotary type is connected with the dwang, the dwang rotates can with the movable rod contact, be connected with the cushion on the dwang.

As the improvement of above-mentioned scheme, supporting mechanism is including first slide bar, place board, stopper and first elastic component, and the inside slidingtype of support is connected with first slide bar, and first slide bar is located the backup pad rear side, and the inside rotary type of support is connected with the board of placing that is used for placing the shank, places the board and is located the backup pad front side, first slide bar with place the board joint, place and be connected with the stopper on the board, be connected with first elastic component between first slide bar rear side and the support.

As the improvement of above-mentioned scheme, still including the actuating mechanism who is used for promoting the backup pad, actuating mechanism is connected with two second link including second link, cylinder and promotion frame on the support, support upper portion, installs the cylinder between two second link, and the rotation type is connected with the promotion frame on the telescopic link of cylinder, promotes the frame and rotates and can with the backup pad joint.

As the improvement of above-mentioned scheme, still including the mechanism that opens and shuts that is used for opening and shuts the sealing plug, the mechanism that opens and shuts is including the dead lever, spacing frame, first wedge, the second elastic component, the push rod, the connecting pipe, the second wedge, third elastic component and connecting rod, the support middle part is connected with two dead levers, equal slidingtype is connected with spacing frame on two dead levers, equal slidingtype is connected with first wedge in two spacing frames, all be connected with the second elastic component between two first wedges and the close spacing frame, be connected with the push rod on the first wedge on right side, two sealing plug front sides all are connected with the connecting pipe, two push rods are connected with close connecting pipe slidingtype respectively, the anterior rotary type of promotion frame is connected with the second wedge, the removal of second wedge can contact with first wedge, all the cover is equipped with the third elastic component on two dead levers, the third elastic component both ends are connected with dead lever and spacing frame respectively, be connected with the connecting rod between left first wedge and the push rod.

As the improvement of the scheme, the lifting device further comprises a lifting mechanism used for lifting the placing plate upwards, the lifting mechanism comprises second sliding rods, a top plate and a contact plate, the upper portion of the support is connected with the two second sliding rods in a sliding mode, the second sliding rods are located on the inner side of the second connecting frame, the top plate is connected between the two second sliding rods, the top plate can move forwards and can be in contact with the placing plate, the contact plate is connected to the rear side of the top plate, and the pushing frame can move forwards and can be in contact with the contact plate.

As the improvement of above-mentioned scheme, still including being used for carrying out the storing mechanism who stores article, storing mechanism is connected with the support frame including the support frame, storage frame and apron on the left handrail, installs on the support frame and stores the frame, stores frame upper portion rotary type and is connected with the apron, and the apron closure can be sealed to storing the frame.

As an improvement of the proposal, the shape of the handrail is a trapezoid with a low front part and a high back part.

1. Operating personnel can make things convenient for operating personnel to place the both legs on placing the board through pulling the backup pad forward with sealing plug and fixed frame separation, can make the cushion rotate, and then conveniently adjusts operating personnel's back lean on the angle, and then through the first slide bar of backward pulling, can make things convenient for operating personnel to place the both legs, and then improve the travelling comfort that operating personnel used this device.

2. The backup pad is driven to the promotion frame and is removed, conveniently pulls out the backup pad, through first wedge and the contact of second wedge, can make the sealing plug seal fixed frame automatically, and then makes things convenient for the leaning on angle of operating personnel adjustment cushion.

3. Through push frame and contact plate contact, can make the roof upwards push up the board of will placing and move, can make and place board and cushion and keep the parallel state, and then make things convenient for operating personnel to straighten the both legs.

4. Store article through storing the frame, and then make things convenient for operating personnel to store article and take out.

5. The shape of handrail is preceding low trapezoidal that high back, and preceding low back high trapezoidal handrail is great with operating personnel hand area of contact, and then makes things convenient for operating personnel to place the hand.

Drawings

Fig. 1 is a schematic perspective view of a first perspective structure according to the present invention.

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

Fig. 3 is a perspective view of a second perspective view according to the present invention.

Fig. 4 is a schematic perspective view of the adjusting mechanism of the present invention.

Fig. 5 is a schematic perspective view of the supporting mechanism of the present invention.

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

Fig. 7 is a schematic view of a first partial structure of the opening and closing mechanism of the present invention.

Fig. 8 is a schematic view of a second partial structure of the opening and closing mechanism of the present invention.

FIG. 9 is a schematic view of a first partially assembled component of the ejection mechanism of the present invention.

FIG. 10 is a schematic view of a second partially assembled component of the ejection mechanism of the present invention.

Fig. 11 is a schematic perspective view of the storage mechanism of the present invention.

Number designation in the figure: 1. the support, 2, a seat cushion, 3, an armrest, 4, a support plate, 5, an adjusting mechanism, 51, a first connecting frame, 52, a fixed frame, 53, a movable rod, 54, a sealing plug, 55, a rotating rod, 56, a back cushion, 6, a support mechanism, 61, a first sliding rod, 62, a placing plate, 63, a limiting block, 64, a first elastic piece, 7, a driving mechanism, 71, a second connecting frame, 72, a cylinder, 73, a pushing frame, 8, an opening and closing mechanism, 81, a fixing rod, 82, a limiting frame, 83, a first wedge-shaped block, 84, a second elastic piece, 85, a push rod, 86, a connecting pipe, 87, a second wedge-shaped block, 88, a third elastic piece, 89, a connecting rod, 9, a jacking mechanism, 91, a second sliding rod, 92, a top plate, 93, a contact plate, 10, a storage mechanism, 101, a support frame, 102, a storage frame, 103, and a cover plate.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Example 1

As shown in fig. 1-5, a sofa with adjustable sitting posture comprises a support 1, a cushion 2, armrests 3, a support plate 4, an adjusting mechanism 5 and a support mechanism 6, wherein the cushion 2 is fixedly connected to the top of the support 1 through bolts, the armrests 3 for placing hands are fixedly connected to the left side and the right side of the top of the support 1 through bolts, the support plate 4 for placing legs is slidably connected to the left side and the right side of the top of the support 1, the adjusting mechanism 5 is arranged on the right side of the middle of the support 1, and the support mechanism 6 is arranged on the rear side inside the support 1.

As shown in fig. 1 and 4, the adjusting mechanism 5 includes a first connecting frame 51, a fixed frame 52, a movable rod 53, a sealing plug 54, a rotating rod 55 and a back cushion 56, two first connecting frames 51 are welded on the right side of the middle of the support 1, the fixed frame 52 is fixedly connected between the two first connecting frames 51 through bolts, the movable rod 53 is movably connected on the rear side of the fixed frame 52, the sealing plug 54 is connected on the front side of the fixed frame 52, the sealing plug 54 is used for sealing the fixed frame 52, the rotating rod 55 is rotatably connected between the left side and the right side of the upper part of the support 1, the rotating rod 55 can be contacted with the movable rod 53 in a rotating manner, and the back cushion 56 is fixedly connected on the rotating rod 55 through bolts.

As shown in fig. 1 and 5, the supporting mechanism 6 includes a first sliding rod 61, a placing plate 62, a limiting block 63 and a first elastic member 64, the first sliding rod 61 is movably connected to the rear side inside the support 1, the placing plate 62 for placing the leg is rotatably connected to the front side inside the support 1, the first sliding rod 61 is connected to the placing plate 62 in a clamping manner, the limiting block 63 is welded to the rear side of the bottom of the placing plate 62, the first elastic member 64 is connected between the rear side of the first sliding rod 61 and the support 1, and the first elastic member 64 is a compression spring.

When an operator needs to use the device, the operator can sit on the seat cushion 2, the hands can be placed on the armrests 3, the sealing plug 54 is pulled out, the back can lean against the back cushion 56, the back cushion 56 drives the rotating rod 55 to rotate backwards on the bracket 1, the rotating rod 55 rotates backwards and simultaneously contacts with the movable rod 53, the movable rod 53 moves forwards to discharge gas in the fixed frame 52, after the back cushion 56 rotates to a preset position, the sealing plug 54 can be clamped with the fixed frame 52 again, the movable rod 53 stops moving under the action of pressure, the movable rod 53 further fixes the rotating rod 55, the back cushion 56 stops rotating, when the operator uses the device, the support plate 4 on the left side can be pulled forwards, then the left leg is placed on the support plate 4, when the left leg does not need to be placed, the support plate 4 on the left side can be pushed backwards to reset, on the contrary, when the right leg is needed to be placed, the right supporting plate 4 can be pulled forward, when the right supporting plate 4 is pulled out, the right leg can be placed on the supporting plate 4, when the right leg is not needed to be placed, the right supporting plate 4 can be pushed backward to reset, when the two legs are needed to be placed, the first sliding rod 61 can be pulled backward, the first elastic piece 64 is compressed, the first sliding rod 61 is pulled backward and separated from the placing plate 62, the placing plate 62 and the limiting block 63 are rotated downward under the influence of gravity, then the two legs can be placed on the placing plate 62 and the limiting block 63, when the two legs are placed, the first sliding rod 61 can be loosened, the first elastic piece 64 drives the first sliding rod 61 to move forward to reset, when the operator does not need to place the two legs, the first sliding rod 61 can be pulled backward again, make first elastic component 64 compressed, then upwards rotate place board 62 and stopper 63 and reset again, after placing board 62 and reset, can loosen first slide bar 61, make first elastic component 64 drive first slide bar 61 and move forward and place board 62 joint, after operating personnel used this device to accomplish, can extract sealing plug 54 forward again, afterwards rotate cushion 56 and dwang 55 forward again, make movable rod 53 and dwang 55 contact backward movement, when movable rod 53 moved backward, the sealing plug can be with gaseous inhaling in fixed frame 52, afterwards reuse 54 again with fixed frame 52 joint, make movable rod 53 stop moving under the effect of pressure, so, through separating sealing plug 54 and fixed frame 52, can make cushion 56 rotate, and then conveniently adjust the leaning angle of operating personnel back, through pulling backup pad 4 forward, can place single shank, and then conveniently adjust operating personnel's position, through pulling first slide bar 61 backward, can make things convenient for operating personnel to place the both legs on placing board 62, and then improve operating personnel's back leaning on angle, can place the convenient operating personnel's of operation high trapezoidal armrest apparatus behind 3 because of convenient for the trapezoidal shape, operating personnel's contact with the front portion is high back.

Example 2

As shown in fig. 1 and 6, on the basis of embodiment 1, the device further comprises a driving mechanism 7, the driving mechanism 7 comprises a second connecting frame 71, a cylinder 72 and a pushing frame 73, the rear sides of the upper portions of the brackets 1 are bilaterally symmetrical and fixedly connected with the second connecting frame 71 through bolts, the cylinder 72 is installed between the two second connecting frames 71 through bolts, the telescopic rod of the cylinder 72 is rotatably connected with the pushing frame 73, and the pushing frame 73 can be rotatably connected with the supporting plate 4 in a clamping manner.

As shown in fig. 1, fig. 7 and fig. 8, the opening and closing mechanism 8 further includes an opening and closing mechanism 8, the opening and closing mechanism 8 includes a fixing rod 81, a limiting frame 82, a first wedge block 83, a second elastic member 84, a push rod 85, a connecting pipe 86, a second wedge block 87, a third elastic member 88 and a connecting rod 89, the fixing rod 81 is welded at the middle position of the left side and the right side of the middle portion of the bracket 1, the limiting frame 82 is connected on the two fixing rods 81 in a sliding manner, the first wedge block 83 is connected in the two limiting frames 82 in a sliding manner, the second elastic member 84 is connected between the two first wedge blocks 83 and the adjacent limiting frame 82 in a sliding manner, the second wedge block 84 is a compression spring, the push rod 85 is fixedly connected on the first wedge block 83 on the right side through a bolt, the connecting pipe 86 is welded on the front sides of the two sealing plugs 54, the two push rods 85 are respectively connected with the connecting pipe 86 of the sealing plug in a sliding manner, the second wedge block 87 is rotatably connected at the front lower side of the pushing frame 73, the second wedge block 87 can move to contact with the first wedge block 83, the two fixing rods 81 are respectively sleeved with the third elastic member 88, the third elastic member 88 and the two ends of the connecting rod 81 and the connecting rod 82 are respectively connected with the connecting rod 89, and the connecting rod 89 through the connecting rod 89, and the connecting rod 89 fixedly connected with the connecting rod 85 on the left side.

When the left support plate 4 needs to be pulled forward, the pushing frame 73 can be rotated to the left, so that the pushing frame 73 is clamped with the left support plate 4, then the air cylinder 72 is started again, so that the telescopic rod of the air cylinder 72 drives the left support plate 4 and the second wedge block 87 to move forward through the pushing frame 73, so that the left first wedge block 83 and the second wedge block 87 are in contact with each other to move forward, so that the second elastic member 84 is compressed, while the left first wedge block 83 moves forward, the connecting rod 89 drives the push rod 85 and the connecting pipe 86 to drive the sealing plug 54 to move forward, so that the sealing plug 54 is separated from the fixed frame 52, when the second elastic member 84 is compressed to the extreme, the first wedge block 83 is in contact with the second wedge block 87 to drive the left limit frame 82 to move outward, so that the left third elastic member 88 is stretched, when the left first wedge block 83 moves outward, the right first wedge block 83, the push rod 85 and the limit frame 82 are driven to move inward through the connecting rod 89, so that the right third elastic member 88 is compressed, while the push rod 85 moves inward, the left first wedge block 86 and the left wedge block 86 move, when the left first wedge block 83 and the left wedge block 83 move backward, the connecting rod 83 move, the left wedge block 83 and the connecting pipe 83 move back cushion 52, so that the connecting rod 83 move back cushion 83 and the connecting rod 83, the connecting rod 83 move back cushion 52, and the left wedge block 83, and the connecting rod 83 move back cushion 52, and the connecting rod 83 move backward, and the connecting rod 83, and the back cushion 52, when the connecting rod 83 move back cushion 83 move, the back cushion 52, and the back cushion 83 move, and the back cushion 83 move back cushion 83, then the back cushion 56 stops rotating, then the telescopic rod of the air cylinder 72 is controlled to drive the pushing frame 73, the second wedge-shaped block 87 and the left support plate 4 to move backwards and reset, the second wedge-shaped block 87 can be rotated inwards while the second wedge-shaped block 87 moves backwards, so that the second wedge-shaped block 87 does not contact with the left first wedge-shaped block 83 any more while moving backwards, the second wedge-shaped block 87 can be rotated outwards to reset after the left first wedge-shaped block 83 resets, then the pushing frame 73 can be rotated downwards and reset, the air cylinder 72 can be closed while the support plate 4 resets, so that the air cylinder 72 stops operating, conversely, when the right support plate 4 needs to be pulled forwards, the pushing frame 73 can be rotated rightwards so that the pushing frame 73 is clamped with the right support plate 4, then the air cylinder 72 is started again, so that the telescopic rod of the air cylinder 72 drives the pushing frame 73, the right support plate 4 and the second wedge-shaped block 87 to move forwards, the first wedge-shaped block 83 on the right side and the second wedge-shaped block 87 drive the push rod 85 to move forwards, so that the second elastic piece 84 is compressed, the first wedge-shaped block 83 on the right side moves forwards, the first wedge-shaped block 83 on the left side can be driven by the connecting rod 89 to move forwards, the sealing plug 54 can be driven by the connecting pipe 86 to be separated from the fixed frame 52 while the push rod 85 moves forwards, when the second elastic piece 84 is compressed to the utmost, the second wedge-shaped block 87 on the right side and the first wedge-shaped block 83 on the right side drive the limiting frame 82 to move outwards, so that the third elastic piece 88 on the right side is stretched, when the first wedge-shaped block 83 on the right side moves outwards, the first wedge-shaped block 83 on the left side, the push rod 85 and the limiting frame 82 are driven to move inwards by the connecting rod 89, so that the third elastic piece 88 on the left side is compressed, and when the push rod 85 moves outwards, the third elastic piece 88 moves rightwards in the connecting pipe 86, when the sealing plug 54 is separated from the fixed frame 52, the operator can lean against the back cushion 56 again, so that the movable rod 53 moves backwards, while the first wedge-shaped block 83 on the right side is separated from the second wedge-shaped block 87, the third elastic member 88 on the right side drives the limiting frame 82 and the first wedge-shaped block 83 to move inwards to reset, while the third elastic member 88 on the left side drives the limiting frame 82 and the first wedge-shaped block 83 to move outwards to reset, while the two first wedge-shaped blocks 83 reset, the second elastic member 84 drives the first wedge-shaped block 83, the push rod 85, the connecting pipe 86 and the sealing plug 54 to move backwards, so that the sealing plug 54 is clamped with the fixed frame 52 again, so that the rotation of the back cushion 56 stops, then the telescopic rod of the air cylinder 72 is controlled to drive the pushing frame 73, the second wedge-shaped block 87 and the support plate 4 on the right side to move backwards to reset, while the second wedge-shaped block 87 moves backwards, the second wedge-shaped block 87 can rotate inwards to enable the second wedge-shaped block 87 to move downwards to push the support plate 73 to move, and then the support plate 73 to move downwards, so that the wedge-reset of the support plate 73 can be conveniently adjusted, and the wedge-operated support plate 73 can be pushed out, so that the support plate 73 can be pushed downwards by the back, and the support plate 73, so that the support plate 73 can be conveniently adjusted.

As shown in fig. 3, 9 and 10, the pushing device further comprises a pushing mechanism 9, the pushing mechanism 9 comprises second sliding rods 91, a top plate 92 and a contact plate 93, the second sliding rods 91 are slidably connected to the left and right sides of the upper portion of the support 1, the top plate 92 is fixedly connected between the two second sliding rods 91 through bolts, the top plate 92 moves forward to be capable of contacting with the placing plate 62, the contact plate 93 is welded to the rear side of the top plate 92, and the pushing frame 73 moves forward to be capable of contacting with the contact plate 93.

When an operator needs to straighten the two legs, the operator can pull the first sliding rod 61 backwards to enable the placing plate 62 to rotate downwards under the influence of gravity, then the air cylinder 72 is started, the telescopic rod of the air cylinder 72 drives the pushing frame 73 to move forwards to be contacted with the contact plate 93, the contact plate 93 drives the second sliding rod 91 and the top plate 92 to move forwards and to be contacted with the placing plate 62 while the top plate 92 moves forwards, the top plate 92 pushes the placing plate 62 upwards, the placing plate 62 is kept parallel to the cushion 2, then the operator can place the two legs on the placing plate 62 to keep the two legs in a straightened state, and when other sitting postures need to be changed, the telescopic rod of the air cylinder 72 can be controlled to drive the pushing frame 73 to move backwards, then close cylinder 72 again for cylinder 72 stops the operation, break away from with contact plate 93 when pushing away frame 73 backward movement, make roof 92 stop the top and move and place board 62, and then make and place board 62 and receive the influence of gravity and rotate downwards, place board 62 contact with roof 92 when rotating downwards, make roof 92 drive second slide bar 91 and contact plate 93 and move backward and reset, will place board 62 afterwards again upwards rotate reset can, so, through pushing away frame 73 and contact plate 93 contact, can make roof 92 will place board 62 and upwards push up, can make and place board 62 and keep the parallel state with cushion 2, and then make things convenient for operating personnel to straighten the both legs.

As shown in fig. 1 and 11, the portable storage device further comprises a storage mechanism 10, wherein the storage mechanism 10 comprises a support frame 101, a storage frame 102 and a cover plate 103, the support frame 101 is connected to the left armrest 3, the storage frame 102 is mounted on the support frame 101 through bolts, the cover plate 103 is rotatably connected to the upper portion of the storage frame 102, and the cover plate 103 is closed to seal the storage frame 102.

When operating personnel need deposit article, can upwards rotate apron 103, then place article in storing frame 102, after the article are placed and are accomplished, can downwards rotate apron 103 for apron 103 seals up storing frame 102 can, on the contrary, when article need be taken out, the operation of repeated above-mentioned rotation apron 103 can take out article, so, store article through storing frame 102, and then make things convenient for operating personnel to store article and take out.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a position of sitting adjustable sofa, is connected with cushion (2) including support (1), cushion (2), handrail (3) and backup pad (4), support (1) top, and support (1) top is connected with two handrail (3) that are used for placing the hand, and two handrail (3) are located cushion (2) outside, and support (1) inside slidingtype is connected with two backup pad (4) that are used for placing the shank, its characterized in that: the leg rest adjusting device is characterized by further comprising an adjusting mechanism (5) and a supporting mechanism (6), the adjusting mechanism (5) used for adjusting the back rest angle is arranged on the right side of the middle of the support (1), and the supporting mechanism (6) used for placing legs is arranged on the rear side of the interior of the support (1).

2. The sofa of claim 1, wherein the sitting position is adjustable by: adjustment mechanism (5) are including first link (51), fixed frame (52), movable rod (53), sealing plug (54), dwang (55) and back cushion (56), support (1) right part is connected with two first link (51), be connected with fixed frame (52) between two first link (51), the movable rod (53) are connected to the side sliding type behind fixed frame (52), fixed frame (52) front side joint has sealing plug (54), sealing plug (54) are used for sealed fixed frame (52), support (1) rear portion rotary type is connected with dwang (55), dwang (55) rotate can contact with movable rod (53), be connected with back cushion (56) on dwang (55).

3. The sofa of claim 2, wherein the sitting position is adjustable by: the supporting mechanism (6) comprises a first sliding rod (61), a placing plate (62), a limiting block (63) and a first elastic piece (64), the first sliding rod (61) is connected to the inside of the support (1) in a sliding mode, the first sliding rod (61) is located on the rear side of the support plate (4), the placing plate (62) used for placing legs is connected to the inside of the support (1) in a rotating mode, the placing plate (62) is located on the front side of the support plate (4), the first sliding rod (61) is connected with the placing plate (62) in a clamping mode, the limiting block (63) is connected to the placing plate (62), and the first elastic piece (64) is connected between the rear side of the first sliding rod (61) and the support (1).

4. The sofa of claim 3, wherein the sitting position is adjustable by: still including actuating mechanism (7) that is used for promoting backup pad (4), actuating mechanism (7) are connected with two second link (71) including second link (71), cylinder (72) and promotion frame (73) on support (1) upper portion, install cylinder (72) between two second link (71), the rotation type is connected with on the telescopic link of cylinder (72) and pushes away movable support (73), push away movable support (73) and rotate and can with backup pad (4) joint.

5. The sofa of claim 4, wherein the adjustable seating position comprises: the sealing device is characterized by further comprising an opening and closing mechanism (8) used for opening and closing the sealing plug (54), the opening and closing mechanism (8) comprises a fixing rod (81), a limiting frame (82), a first wedge block (83), a second elastic piece (84), push rods (85), connecting pipes (86), a second wedge block (87), a third elastic piece (88) and a connecting rod (89), two fixing rods (81) are connected to the middle of the support (1), the limiting frame (82) is connected to the two fixing rods (81) in a sliding mode, the first wedge blocks (83) are connected to the two limiting frames (82) in a sliding mode, the second elastic pieces (84) are connected between the two first wedge blocks (83) and the adjacent limiting frames (82) in a sliding mode, the push rods (85) are connected to the first wedge blocks (83) on the right side, the connecting pipes (86) are connected to the front sides of the two sealing plugs (54), the two push rods (85) are connected to the adjacent connecting pipes (86) in a sliding mode respectively, the second wedge blocks (87) are connected to the front portion of the pushing frame (73) in a rotating mode, the second wedge blocks (87) can move to be in contact with the first wedge blocks (83), the third wedge blocks (88), the third wedge blocks (81) and the two ends of the third elastic pieces (88) are connected to be sleeved with the limiting frames (88), a connecting rod (89) is connected between the first wedge block (83) on the left side and the push rod (85).

6. The sofa of claim 5, wherein the sitting position is adjustable by: the lifting device is characterized by further comprising a jacking mechanism (9) used for jacking the placing plate (62) upwards, the jacking mechanism (9) comprises second sliding rods (91), a top plate (92) and a contact plate (93), the upper portion of the support (1) is connected with the two second sliding rods (91) in a sliding mode, the second sliding rods (91) are located on the inner side of the second connecting frame (71), the top plate (92) is connected between the two second sliding rods (91), the top plate (92) can move forwards to be in contact with the placing plate (62), the contact plate (93) is connected to the rear side of the top plate (92), and the pushing frame (73) can move forwards to be in contact with the contact plate (93).

7. The sofa of claim 6, wherein the sitting position is adjustable by: still including being used for carrying out the storing mechanism (10) that store to article, storing mechanism (10) are connected with support frame (101) on left handrail (3) including support frame (101), storage frame (102) and apron (103), install on support frame (101) and store frame (102), store frame (102) upper portion rotary type and be connected with apron (103), apron (103) closure can be sealed storage frame (102).

8. The sofa of claim 7, wherein the sitting position is adjustable by: the shape of the handrail (3) is a trapezoid with a low front part and a high back part.

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