CN214156806U - Comfortable sofa stretching device - Google Patents
Comfortable sofa stretching device Download PDFInfo
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- CN214156806U CN214156806U CN202021188875.6U CN202021188875U CN214156806U CN 214156806 U CN214156806 U CN 214156806U CN 202021188875 U CN202021188875 U CN 202021188875U CN 214156806 U CN214156806 U CN 214156806U
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Abstract
The utility model discloses a comfortable sofa stretching device, which comprises an underframe, a backrest mechanism, a seat frame, a leg supporting mechanism and a driving mechanism; the backrest mechanism is rotationally connected relative to the underframe; one end of the seat frame is rotationally connected with the backrest mechanism, and the other end of the seat frame is rotationally connected with the leg support mechanism; the leg supporting mechanism comprises a shank supporting part for supporting the shank and a folding part for adjusting the angle of the shank supporting part relative to the seat frame, the folding part is rotatably connected to the seat frame, and the shank supporting part is rotatably connected to one end, far away from the seat frame, of the folding part. The seat frame and the backrest component rotate at a large angle relative to the ground through a simple mechanism, so that a user can be in a lying posture. Meanwhile, when a user uses the sofa to be in a zero-gravity state, the leg supporting mechanism can be partially bent downwards, so that the shank part can be bent relative to the thigh part, the cramp or discomfort caused by the fact that the leg part is always straight is prevented, and the use comfort is improved.
Description
Technical Field
The utility model relates to the field of furniture, concretely relates to sofa stretching device of comfortable type.
Background
Sofas are currently suitable for use in various areas of life of people, such as offices, living rooms, bedrooms, outdoors, and the like. With the development of economy, the variety of furniture used by people in daily life is increasingly diversified. Due to the desire for comfort, many zero-gravity sofas are available on the market.
For example, the utility model with the application number of CN201920625851.3 discloses a sofa with an improved structure, which comprises an underframe structure, a linkage mechanism, a back structure, a leg structure and a driving device, wherein the leg structure and the back structure are respectively connected with the underframe structure, the driving device is in driving connection with the leg structure and the back structure, and two ends of the linkage mechanism are respectively connected with the leg structure and the back structure; the linkage mechanism comprises a leg rotating rod, a first linkage plate, a first linkage rod, a second linkage rod, a third linkage rod, a fourth linkage rod, a fifth linkage rod, a second linkage plate, a back rotating rod, a sixth linkage rod and a seventh linkage rod.
As can be seen in the drawings, the leg structure is a straight line when the sofa is in a zero gravity state, so that the leg structure is inclined upwards relative to the back to form a straight line. Namely, when a person is in a zero gravity state, the legs are always in a stretched state, which is easy to cause discomfort in use.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims at providing a comfortable sofa stretching device,
in order to achieve the above purpose, the utility model provides a following technical scheme:
a comfortable sofa stretching device comprises an underframe, a backrest mechanism, a seat frame, a leg supporting mechanism and a driving mechanism;
the backrest mechanism is rotatably connected relative to the bottom frame and used for adjusting the inclination angle of the backrest mechanism;
one end of the seat frame is rotatably connected with the backrest mechanism and used for adjusting an included angle between the seat frame and the backrest mechanism, and the other end of the seat frame is rotatably connected with the leg support mechanism and used for adjusting an included angle between the leg support mechanism and the seat frame;
the leg supporting mechanism comprises a shank supporting part for supporting the shank and a folding part for adjusting the angle of the shank supporting part relative to the seat frame, the folding part is rotatably connected to the seat frame, and the shank supporting part is rotatably connected to one end, far away from the seat frame, of the folding part.
By adopting the technical scheme, the seat frame and the backrest component can rotate at a large angle relative to the ground through a simple mechanism, so that a user can be in a lying posture. Meanwhile, when a user uses the sofa to be in a zero-gravity state, the leg supporting mechanism can be partially bent downwards, so that the shank part can be bent relative to the thigh part, the cramp or discomfort caused by the fact that the leg part is always straight is prevented, and the use comfort is improved.
The utility model discloses a further set up to: backrest mechanism includes the backrest subassembly, is used for ordering about the link gear of backrest subassembly and seat frame simultaneous movement, the seat frame all rotates through the link gear and connects in the chassis, and the middle part of backrest subassembly rotates and connects in the chassis, the pivot point of the relative seat frame of backrest subassembly is located backrest subassembly one end, install on the chassis and be used for driving the relative chassis pivoted actuating mechanism of seat frame, actuating mechanism is including installing the first driving piece that is used for providing the thrust along seat frame length direction for the link gear between chassis and link gear and installing the second driving piece that is used for providing the thrust along seat frame length direction for the folding portion between link gear and the folding portion.
Through adopting above-mentioned technical scheme, rotate through the relative chassis of first driving piece drive back subassembly and seat frame, can lead to the position of second driving piece to change when first driving piece extension simultaneously to give shank supporting mechanism power through the second driving piece, make shank supporting mechanism also have certain degree motion, then rethread second driving piece itself gives shank supporting mechanism drive power, make shank supporting mechanism realize the state that the part is crooked. When the first driving piece is in an initial state, the leg supporting mechanism is directly driven to move through the second driving piece, so that the leg supporting mechanism can be directly unfolded. The synchronization is also accompanied by a subsection, and the two driving forces can make the person in a state of straightening the legs without lying backwards, so that the stretching device is suitable for various forms.
The utility model discloses a further set up to: the backrest component comprises two backrest support rods which are symmetrically arranged along the length direction of the seat frame, and the linkage mechanism is provided with two and one linkage mechanism for one backrest support rod.
Through adopting above-mentioned technical scheme to make the equal atress in back subassembly both ends, make seat frame and back subassembly's rotation adjust more stable, improved use comfort.
The utility model discloses a further set up to: the linkage mechanism comprises a first connecting rod fixedly connected to the underframe and a second connecting rod rotatably connected to the first connecting rod, one end, far away from the underframe, of the first connecting rod is rotatably connected to the underframe, a rotating point between the second connecting rod and the first connecting rod is positioned between a rotating point, far away from the first connecting rod, of the first connecting rod relative to the seat frame and a rotating point, far away from the first connecting rod, of the second connecting rod is rotatably connected to the backrest supporting rod, and a connecting point of the second connecting rod and the backrest supporting rod is positioned between a rotating point, far away from the backrest supporting rod, of the backrest supporting rod relative to the underframe and a rotating point, far away from the backrest supporting rod, of the backrest supporting rod relative to the seat frame; two set firmly first force transmission pole between the second connecting rod, first driving piece both ends rotate respectively and connect in first force transmission pole and chassis.
Through adopting above-mentioned technical scheme, through first connecting rod and the transmission of second connecting rod to when making the seat frame exert along its length direction's thrust by first driving piece, the seat frame can rotate relative the chassis and make its one end lifting and slightly move forward, and when the seat frame rotated simultaneously, because spacing and the traction of second connecting rod, the relative seat frame of back subassembly rotates and makes the back subassembly keep away from seat frame one end and topple over backward, and because the seat frame moves forward the surplus that provides out, makes the back subassembly can topple over to bigger angle backward. The human body can be better in a zero gravity state.
The utility model discloses a further set up to: the backrest comprises a bottom frame and a third connecting rod which is vertically and upwards arranged and fixedly connected to the bottom frame, the backrest supporting rod is Z-shaped, the middle part of the backrest supporting rod is rotatably connected to the upper end of the third connecting rod, and a limiting block is fixedly arranged in the middle part of the backrest supporting rod; when the stretching device is in a zero-gravity sitting feeling state, the limiting block abuts against the third connecting rod.
Through adopting above-mentioned technical scheme, spacing through the stopper to make stretching device better keep at zero gravity state.
The utility model discloses a further set up to: the folding part comprises two groups of folding mechanisms which are symmetrically arranged along the length direction of the seat frame and a second dowel bar which is used for connecting the two folding mechanisms to enable the two folding mechanisms to synchronously move, two ends of a second driving piece are respectively and rotatably connected to the first dowel bar and the second dowel bar, and the shank supporting parts are provided with two folding mechanisms which are respectively and correspondingly connected.
Through adopting above-mentioned technical scheme to make two shank of people all can have corresponding strong point, thereby improve use comfort.
The utility model discloses a further set up to: folding mechanism connects in the first leg pole of seat frame, is on a parallel with first leg pole and rotates the second leg pole of connecting in the seat frame, rotates the third leg pole of connecting in first leg pole and second leg pole, rotates the fourth leg pole of connecting in second leg pole and being on a parallel with third leg pole, the shank supporting part rotates simultaneously and connects in third leg pole and fourth leg pole, the second biography power pole includes two and passes the connecting rod of power seat and two biography power seats of fixed connection, biography power seat both ends difference fixed connection in first leg pole middle part and second leg pole middle part.
Through adopting above-mentioned technical scheme, under the prerequisite that first driving piece is in initial setting, the second driving piece gives the drive power of second dowel steel along seat frame length direction to drive first leg pole and second leg pole and rotate, make folding mechanism outwards extend out and open, until it is on a parallel with the seat frame, fine support shank.
The utility model discloses a further set up to: the shank supporting part comprises a knee supporting block rotatably connected to the third leg rod and the fourth leg rod, an intermediate rod rotatably connected to one end, far away from the second leg rod, of the fourth leg rod, and a foot supporting rod rotatably connected to the knee supporting block, and the intermediate rod is rotatably connected to the middle of the foot supporting rod.
Through adopting above-mentioned technical scheme, be in under the prerequisite of initial setting at first driving piece, give the drive power that second dowel steel is followed seat frame length direction through the second driving piece alone to drive first leg pole and second leg pole and rotate, make folding mechanism outwards extend, still link simultaneously shank supporting part outwards and extend, until it is on a parallel with the seat frame, fine support shank.
The utility model discloses a further set up to: the first driving piece and the second driving piece are located on the same vertical plane.
Through adopting above-mentioned technical scheme to the application of force of first dowel steel and second dowel steel when making the application of force is on same vertical face, can not make second dowel steel and first dowel steel receive the shear force because first driving piece and the crisscross setting of second driving piece, has reduced the possibility of its deformation.
The utility model has the advantages of it is following: 1. the person is completely in a zero gravity state, so that the person can further relax and rest; 2. the leg supporting mechanism can be partially bent downwards, so that the lower leg part can be bent relative to the thigh part, cramps or discomfort caused by the fact that the leg part is always straight is prevented, and the use comfort is improved.
Drawings
FIG. 1 is a schematic diagram of a sitting posture state according to an embodiment;
FIG. 2 is a schematic structural diagram of a leisure state according to an embodiment;
FIG. 3 is a schematic view of a zero gravity state according to an embodiment;
FIG. 4 is a schematic structural diagram according to the first embodiment;
fig. 5 is an enlarged view of a portion a in fig. 4.
Reference numerals: 1. a chassis; 2. a backrest support bar; 3. a seat frame; 4. a leg support mechanism; 5. a linkage mechanism; 6. a drive mechanism; 7. a third connecting rod; 8. a first connecting rod; 9. a second connecting rod; 10. a limiting block; 11. a limiting surface; 12. a first driving member; 13. a second driving member; 14. a first transfer lever; 15. a second dowel bar; 16. a first leg bar; 17. a second leg bar; 18. a third leg bar; 19. a fourth leg bar; 20. a knee support block; 21. an intermediate lever; 22. a foot support bar; 23. a force transmission seat; 24. a connecting rod.
Detailed Description
The first embodiment is as follows:
a comfortable sofa stretching device comprises an underframe 1, a backrest component, a seat frame 3, a leg supporting mechanism 4, a linkage mechanism 5 and a driving mechanism 6. The backrest assembly and the linkage 5 form a backrest mechanism. The middle part of the backrest component is rotationally connected with the underframe 1, and the rotation point of the backrest component relative to the seat frame 3 is positioned at one end of the backrest component; one end of the seat frame 3 is rotatably connected with the backrest component, the other end of the seat frame is rotatably connected with the leg supporting mechanism 4, and the seat frame 3 is rotatably connected with the bottom frame 1 through the linkage mechanism 5.
Under the normal sitting state of the sofa using the stretching device, the leg supporting mechanism 4 is folded and contracted under the seat frame 3, the angle formed between the backrest component and the ground is 113 degrees, the angle formed between the seat frame 3 and the ground is 9 degrees, and the angle formed between the seat frame 3 and the backrest component is 99 degrees, so that a person is in a comfortable sitting state.
If a person needs to support the legs, the driving mechanism 6 gives a driving force to the leg supporting mechanism 4 along the length direction of the seat frame 3, so that the leg supporting mechanism 4 extends outwards until the whole body is parallel to the seat frame 3, thereby supporting the legs of the user.
When a person lies on his back, the seat frame 3 is rotated and slightly moved forward relative to the base frame 1 by the driving force of the driving mechanism 6 along the length direction of the seat frame 3 until the angle formed between the seat frame and the ground is 20 degrees. At this time, the backrest mechanism is rotated relative to the seat frame 3 and the underframe 1 due to the force transmission of the linkage mechanism 5, so that the angle formed between the backrest assembly and the ground reaches 150 degrees. Thereby enabling the user to be in a zero-gravity state of lying behind and enabling the user to be more comfortable.
Specifically, the underframe 1 is an Contraband-shaped frame formed by connecting rod bodies. The vertical direction all is equipped with third connecting rod 7 along 1 both sides of chassis, and third connecting rod 7 is used for connecting the back subassembly. The backrest component comprises two backrest support rods 2 symmetrically arranged along the length direction of the seat frame 3, the backrest support rods 2 are Z-shaped, and the lower ends of the backrest support rods 2 are rotatably connected to the seat frame 3. The backrest support rod 2 is rotatably connected to the upper end of the third connecting rod 7, and the rotating points of the backrest support rod 2 and the third connecting rod 7 are located at a second turning point of the backrest support rod 2 from top to bottom. So that the backrest module is stably rotatably mounted to the base frame 1 by the third link 7.
The linkage 5 is provided with two and one linkage 5 for one backrest support bar 2. The linkage 5 comprises a first connecting rod 8 and a second connecting rod 9 rotatably connected to the first connecting rod 8. One end of the first connecting rod 8 is rotatably connected with one end of the opening end of the underframe 1. One end of the first connecting rod 8, which is far away from the bottom frame 1, is rotatably connected to the middle part of the bottom frame. The second connecting rod 9 is Z-shaped. The rotation point between the second connecting rod 9 and the first connecting rod 8 is located between the rotation point of the first connecting rod 8 relative to the seat frame 3 and the rotation point of the first connecting rod 8 relative to the chassis 1. One end of the second connecting rod 9, which is far away from the first connecting rod 8, is rotatably connected to the backrest supporting rod 2, and a connecting point of the second connecting rod 9 and the backrest supporting rod 2 is located between a rotating point of the backrest supporting rod 2 relative to the underframe 1 and a rotating point of the backrest supporting rod 2 relative to the third connecting rod 7.
At this moment, exert the power along its length direction to seat frame 3, can drive seat frame 3 and back bracing piece 2 synchronous rotation, and seat frame 3 can move forward slightly at the rotation in-process, realizes stepping down to back bracing piece 2, makes this extension device can be better reach zero gravity state.
In order to keep the stretching device in a zero gravity state better, a limit block 10 is fixedly arranged in the middle of the backrest support rod 2. The upper end of the third connecting rod 7 is inclined to form a limiting surface 11; when the stretching device is in a zero gravity sitting feeling state, the limiting block 10 abuts against the limiting surface 11 on the third connecting rod 7.
The driving mechanism 6 includes a first driving member 12 for providing the bezel 3 with a linear thrust in the lengthwise direction of the bezel 3 and a second driving member 13 for providing the leg support mechanism 4 with a linear thrust in the lengthwise direction of the bezel 3. A first force transmission rod is fixedly arranged between the two second connecting rods 9. The first driving member 12 is a driving cylinder, the first driving member 12 is disposed along the length direction of the seat frame 3, and two ends of the first driving member 12 are respectively rotatably connected to the first transmission rod 14 and the base frame 1.
The leg support mechanism 4 includes a lower leg support portion for supporting the lower leg portion and a folding portion for adjusting the angle of the lower leg support portion with respect to the seat frame 3. The folding part comprises two groups of folding mechanisms which are symmetrically arranged along the length direction of the seat frame 3 and a second dowel bar 15 which is used for connecting the two folding mechanisms to enable the two folding mechanisms to synchronously move. The shank support part is provided with two folding mechanisms which are respectively and correspondingly connected. The second drive element 13 is a drive cylinder. The second driving member 13 is disposed along the length direction of the seat frame 3, and two ends of the second driving member 13 are respectively and rotatably connected to the first transmission rod 14 and the second transmission rod 15. The first driver 12 and the second driver 13 are located in the same vertical plane.
The folding mechanism includes a first leg lever 16 rotatably connected to the seat frame 3, a second leg lever 17 parallel to the first leg lever 16 and rotatably connected to the seat frame 3, a third leg lever 18 rotatably connected to the first leg lever 16 and the second leg lever 17, and a fourth leg lever 19 rotatably connected to the second leg lever 17 and parallel to the third leg lever 18. The second force transmission rod 15 comprises two force transmission seats 23 and a connecting rod 24 fixedly connected with the two force transmission seats 23, and two ends of each force transmission seat 23 are respectively and fixedly connected to the middle parts of the first leg rod 16 and the second leg rod 17. The lower leg support part includes a knee support block 20 rotatably connected to the third leg bar 18 and the fourth leg bar 19, an intermediate bar 21 rotatably connected to one end of the fourth leg bar 19 remote from the second leg bar 17, and a foot support bar 22 rotatably connected to the knee support block 20, the intermediate bar 21 being rotatably connected to a middle portion of the foot support bar 22.
When the first driving member 12 is in the initial state, the second driving member 13 gives the second force-transmitting rod 15 a driving force along the length direction of the seat frame 3, so as to drive the first leg rod 16 and the second leg rod 17 to rotate, so that the leg connecting assembly extends outwards until it is parallel to the seat frame 3, and the leg is well supported.
When the first driving member 12 is in the extended state, the position of the first force transmission rod is changed due to the movement of the first driving member 12, so that the force is applied to the leg supporting mechanism 4 through the second driving member 13, the leg supporting mechanism 4 is moved to a certain degree, and then the driving force is applied to the leg supporting mechanism 4 through the second driving member 13, so that the lower leg supporting portion is bent relative to the folding mechanism. Therefore, when a user uses the sofa to be in a zero-gravity state, the leg supporting mechanism 4 can be partially bent downwards, so that the lower leg part can be bent relative to the thigh part, cramps or discomfort caused by the fact that the leg part is always straight is prevented, and the use comfort is improved.
The principle of the application is as follows:
comprises three states, namely a sitting posture state, a leisure state and a zero gravity state;
in the sitting position, the leg support mechanism 4 is folded and contracted under the seat frame 3, the angle formed between the backrest assembly and the ground is 113 degrees, the angle formed between the seat frame 3 and the ground is 9 degrees, and the angle formed between the seat frame 3 and the backrest assembly is 99 degrees, so that the person is in a comfortable sitting position.
In a leisure state, that is, a state in which the upper half and the lower half of the body are supported, an angle formed between the backrest unit and the floor surface is 113 °, an angle formed between the seat frame 3 and the floor surface is 9 °, and an angle formed between the seat frame 3 and the backrest unit is 99 °. The leg support means 4 extends outwardly until it is generally parallel to the seat frame 3 so as to support the legs of the user. The person is in a comfortable half lying state. In this state, operations such as reading a book and watching a television can be performed.
In the zero gravity state, the angle formed between the backrest module and the ground is 150 °, the angle formed between the seat frame 3 and the ground is 20 °, the angle formed between the seat frame 3 and the backrest module is 130 °, the folding mechanism is extended outward, and the lower leg support portion is bent downward, thereby supporting the legs of the user. Thereby enabling the person to be in a zero-gravity fully supine position for resting a nap.
When the stretching device is switched between the sitting posture and the leisure posture, the piston rod of the second driving piece 13 is extended, the second driving piece 13 gives an outward driving force to the second force transmission rod 15 along the length direction of the seat frame 3, the first leg rod 16 and the second leg rod 17 rotate, so that the third leg rod 18 and the fourth leg rod 19 are driven to rotate, the knee supporting block 20 and the foot supporting rod 22 are unfolded outwards to be positioned in a straight line with the seat frame 3, and at the moment, the whole leg supporting mechanism 4 is extended outwards to be opened, so that the foot is supported. When the piston rod of the second driving member 13 is shortened, the motion tracks are opposite, and the whole leg supporting mechanism 4 is contracted and folded back to the lower part of the seat frame 3, thereby completing the state conversion.
When the stretching device is switched between a zero gravity state and a leisure state, the piston rod of the first driving part 12 extends to provide the first transmission rod 14 with an outward driving force along the length direction of the seat frame 3, the seat frame 3 rotates relative to the base frame 1 and can move relative to the base frame 1 to one side far away from the backrest component, under the driving of the linkage mechanism 5, the backrest component can rotate relative to the seat frame 3, so that the forward tilting of the seat frame 3 and the backward tilting of the backrest component are completed, the shank supporting part can bend downwards, and the complete state is converted. When the piston rod of the second driving member 13 is shortened, the movement track is reversed, the seat frame 3 is reset, and the backrest assembly is tilted forward, thereby restoring the leisure state.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. A comfortable sofa stretching device is characterized in that: comprises a bottom frame (1), a backrest mechanism, a seat frame (3), a leg supporting mechanism (4) and a driving mechanism (6);
the backrest mechanism is rotatably connected relative to the bottom frame (1) and used for adjusting the inclination angle of the backrest mechanism;
one end of the seat frame (3) is rotatably connected with the backrest mechanism and used for adjusting an included angle between the seat frame (3) and the backrest mechanism, and the other end of the seat frame is rotatably connected with the leg support mechanism (4) and used for adjusting an included angle between the leg support mechanism (4) and the seat frame (3);
the leg supporting mechanism (4) comprises a shank supporting part for supporting the shank and a folding part for adjusting the angle of the shank supporting part relative to the seat frame (3), the folding part is rotatably connected to the seat frame (3), and the shank supporting part is rotatably connected to one end, far away from the seat frame (3), of the folding part.
2. A comfortable sofa stretching apparatus according to claim 1, wherein: the backrest mechanism comprises a backrest component and a linkage mechanism (5) used for driving the backrest component and the seat frame (3) to move synchronously, the seat frames (3) are rotationally connected with the bottom frame (1) through the linkage mechanism (5), the middle part of the backrest component is rotationally connected with the bottom frame (1), the rotation point of the backrest component relative to the seat frame (3) is positioned at one end of the backrest component, a driving mechanism (6) for driving the seat frame (3) to rotate relative to the bottom frame (1) is arranged on the bottom frame (1), the driving mechanism (6) comprises a first driving piece (12) which is arranged between the bottom frame (1) and the linkage mechanism (5) and used for providing thrust along the length direction of the seat frame (3) for the linkage mechanism (5), and a second driving piece (13) which is arranged between the linkage mechanism (5) and the folding part and used for providing thrust along the length direction of the seat frame (3) for the folding part.
3. A comfortable sofa stretching apparatus according to claim 2, wherein: the backrest component comprises two backrest support rods (2) which are symmetrically arranged along the length direction of the seat frame (3), and the linkage mechanism (5) is provided with two linkage mechanisms (5) and one backrest support rod (2).
4. A comfortable sofa stretching apparatus according to claim 3, wherein: the linkage mechanism (5) comprises a first connecting rod (8) fixedly connected to the underframe (1) and a second connecting rod (9) rotatably connected to the first connecting rod (8), one end, far away from the underframe (1), of the first connecting rod (8) is rotatably connected to the underframe, a rotating point between the second connecting rod (9) and the first connecting rod (8) is located between a rotating point of the first connecting rod (8) relative to the seat frame (3) and a rotating point of the first connecting rod (8) relative to the underframe (1), one end, far away from the first connecting rod (8), of the second connecting rod (9) is rotatably connected to the backrest supporting rod (2), and a connecting point of the second connecting rod (9) and the backrest supporting rod (2) is located between a rotating point of the backrest supporting rod (2) relative to the underframe (1) and a rotating point of the backrest supporting rod (2) relative to the seat frame (3); and a first force transmission rod (14) is fixedly arranged between the two second connecting rods (9), and two ends of a first driving piece (12) are respectively and rotatably connected to the first force transmission rod (14) and the underframe (1).
5. A comfortable sofa stretching apparatus according to claim 4, wherein: the backrest support frame comprises an underframe and a third connecting rod (7) which is vertically and upwards arranged and fixedly connected to the underframe, wherein the backrest support rod (2) is Z-shaped, the middle part of the backrest support rod (2) is rotatably connected to the upper end of the third connecting rod (7), and a limiting block (10) is fixedly arranged in the middle part of the backrest support rod (2); when the stretching device is in a zero gravity sitting feeling state, the limiting block (10) is abutted to the third connecting rod (7).
6. A comfortable sofa stretching apparatus according to claim 4, wherein: the folding portion comprises two groups of folding mechanisms which are symmetrically arranged along the length direction of the seat frame (3) and a second dowel bar (15) which is used for connecting the two folding mechanisms to enable the two folding mechanisms to synchronously move, the two ends of the second driving piece (13) are respectively connected to the first dowel bar (14) and the second dowel bar (15) in a rotating mode, and the shank supporting portion is provided with two folding mechanisms which are respectively connected correspondingly.
7. A comfortable sofa stretching apparatus according to claim 6, wherein: folding mechanism is including rotating first leg pole (16) of connecting in seat frame (3), being on a parallel with first leg pole (16) and rotate and connect in second leg pole (17) of seat frame (3), rotate third leg pole (18) of connecting in first leg pole (16) and second leg pole (17), rotate and connect in second leg pole (17) and be on a parallel with fourth leg pole (19) of third leg pole (18), the shank supporting part rotates simultaneously and connects in third leg pole (18) and fourth leg pole (19), second biography power pole (15) include two biography power seats (23) and connecting rod (24) of two biography power seats (23) of fixed connection, pass power seat (23) both ends fixed connection respectively in first leg pole (16) middle part and second leg pole (17) middle part.
8. A comfortable sofa stretching apparatus according to claim 7, wherein: the lower leg supporting part comprises a knee supporting block (20) which is rotatably connected with the third leg rod (18) and the fourth leg rod (19), an intermediate rod (21) which is rotatably connected with one end of the fourth leg rod (19) far away from the second leg rod (17), and a foot supporting rod (22) which is rotatably connected with the knee supporting block (20), wherein the intermediate rod (21) is rotatably connected with the middle part of the foot supporting rod (22).
9. A comfortable sofa stretching apparatus according to claim 4, wherein: the first driving piece (12) and the second driving piece (13) are located on the same vertical plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021188875.6U CN214156806U (en) | 2020-06-23 | 2020-06-23 | Comfortable sofa stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021188875.6U CN214156806U (en) | 2020-06-23 | 2020-06-23 | Comfortable sofa stretching device |
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| Publication Number | Publication Date |
|---|---|
| CN214156806U true CN214156806U (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021188875.6U Active CN214156806U (en) | 2020-06-23 | 2020-06-23 | Comfortable sofa stretching device |
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| Country | Link |
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| CN (1) | CN214156806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022152309A1 (en) * | 2021-01-18 | 2022-07-21 | 德沃康科技集团有限公司 | Sofa extension device |
-
2020
- 2020-06-23 CN CN202021188875.6U patent/CN214156806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022152309A1 (en) * | 2021-01-18 | 2022-07-21 | 德沃康科技集团有限公司 | Sofa extension device |
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