CN220236481U - Stretching device of electric sofa - Google Patents
Stretching device of electric sofa Download PDFInfo
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- CN220236481U CN220236481U CN202320883221.2U CN202320883221U CN220236481U CN 220236481 U CN220236481 U CN 220236481U CN 202320883221 U CN202320883221 U CN 202320883221U CN 220236481 U CN220236481 U CN 220236481U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 230000002146 bilateral effect Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 description 3
- 230000036544 posture Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The utility model discloses an extension device of an electric sofa. The device comprises a mounting base, a driving mechanism and a seat supporting mechanism, wherein the mounting base comprises a mounting rod and a fixing plate which is arranged on the mounting rod in a bilateral symmetry manner, the fixing plate extends forwards, the front end of the fixing plate is provided with a connecting seat, and the connecting seat extends downwards; the driving mechanism comprises an electric push rod and a driving rod, the driving rod is positioned in front of the mounting rod and is arranged in parallel with the mounting rod, the end part of the driving rod is respectively connected with the connecting seat through two first connecting rods, one end of the electric push rod is hinged with the driving rod, and the other end of the electric push rod is hinged with the mounting rod; the seat supporting mechanism comprises two seat frame connecting plates, the seat frame connecting plates are rotationally connected with the mounting base through transmission connecting rods, the upper ends of the transmission connecting rods are hinged with the side walls of the front ends of the seat frame connecting plates, and the lower ends of the transmission connecting rods are hinged with the upper ends of the first connecting rods. The utility model reduces the damage to the cushion on the seat frame during working and achieves the purpose of prolonging the service life of the cushion.
Description
Technical Field
The utility model relates to the field of furniture, in particular to an extension device of an electric sofa.
Background
The electric sofa can realize adapting to the body postures of different demands of users by controlling the extension and retraction of the foot rest of the sofa, the lifting of the seat frame and the leaning and the resetting through the keys, thereby guaranteeing the comfortable experience of the users.
The Chinese patent publication number is: CN209121640U, publication date: 2019-07-19 discloses a rotary seat 61, a driving component 5, a foot rest rod component 1, a cushion mounting component 2, a base mounting component 3, a mechanism moving component 4 and a driving component 5 which are arranged at the left side and the right side of the rotary seat, wherein the driving component 5 comprises an upper fixing component 51, a rotary push rod 52 and a lower fixing component 53, and a push rod 62 for connecting the upper fixing component and the lower fixing component 53 of the driving component 5 at the two sides is arranged between the lower fixing components 53; one end of the lower fixing piece 53 is hinged with the front end of the base mounting piece 3, and the other end is hinged with the lower end of the rotary push rod 52; one end of the upper fixing piece 51 is fixedly connected with the cushion mounting piece 2, and the other end is hinged with the upper end of the rotary push rod 52; one end of a push rod motor 63 is hinged with the rotating seat, the other end of the push rod motor 63 is hinged with the push rod 62, and the push rod motor 63 drives the push rod 62 to move back and forth so as to drive the whole device to move.
When the sofa is specifically used, the seat frame of the sofa is installed on the seat cushion installation piece 2, the S springs are paved on the seat frame, the seat cushion is installed on the S springs, and when a person sits on the electric sofa, the seat cushion presses down the S springs, so that the bottom surface of the seat cushion installation piece is lower than the top surface of the seat cushion installation pad 2. As shown in fig. 3 of the application, when the push rod motor 63 drives the push rod 62 to move forward, the hinge of the rotating push rod 52 and the lower fixing member 53 protrudes upward and is higher than the seat cushion mounting member 2. At this time, the hinge between the rotating push rod 52 and the lower fixing member 53 is against the seat cushion, and the skin of the seat cushion of such a sofa is usually made of leather, so that the hinge between the rotating push rod 52 and the lower fixing member 53 may damage the bottom surface of the seat cushion.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide an extension device of an electric sofa, wherein a first connecting rod and a transmission connecting rod are respectively arranged at the upper end and the lower end of a driving rod, so that when the extension device works, the two connecting rods participating in lifting of a seat frame cannot be higher than a seat frame connecting plate, and as the seat frame is arranged on the top surface of the seat frame connecting plate, the extension device in the application cannot damage a seat cushion on the seat frame during working.
The technical scheme of the utility model is realized as follows:
an extension device for a motorized sofa, comprising:
the mounting base comprises a mounting rod and fixing plates which are symmetrically arranged on the mounting rod in a left-right mode, wherein the fixing plates extend forwards, connecting seats are arranged at the front ends of the fixing plates, and the connecting seats extend downwards;
the driving mechanism comprises an electric push rod and a driving rod, the driving rod is positioned in front of the mounting rod and is arranged in parallel with the mounting rod, the left end and the right end of the driving rod are in one-to-one correspondence with the two connecting seats, the end part of the driving rod is connected with the corresponding connecting seat through a first connecting rod, the side wall of the upper end of the first connecting rod is fixedly connected with the driving rod, the lower end of the first connecting rod is hinged with the lower end of the corresponding connecting seat, one end of the electric push rod is hinged with the driving rod, and the other end of the electric push rod is hinged with the mounting rod;
the seat supporting mechanism comprises two seat frame connecting plates for connecting seat frames, wherein the two seat frame connecting plates are arranged in bilateral symmetry, the seat frame connecting plates are arranged in the front-back direction and are positioned above the installation base, the seat frame connecting plates are rotationally connected with a driving rod through a transmission connecting rod, the upper ends of the transmission connecting rods are hinged with the side wall of the front end of the seat frame connecting plates, the lower ends of the transmission connecting rods are hinged with the upper ends of the first connecting rods, and the heights of the transmission connecting rods are always lower than the top surfaces of the seat frame connecting plates when the transmission connecting rods rotate.
In this scheme, the extension device has expansion state and shrink state, and the extension device passes through actuating mechanism and realizes both switching, and when the extension device switched from expansion state to shrink state, the seat frame connecting plate descends, and specifically, electric putter promotes the actuating lever and keeps away from the installation pole, and first connecting rod rotates and drives the transmission connecting rod and rotate downwards, and the transmission connecting rod pulls the seat frame connecting plate that corresponds and descends. The hinge point of the first connecting rod and the connecting seat is located at the lower end of the first connecting rod, the hinge point of the transmission connecting rod and the seat frame connecting plate and the hinge point of the first connecting rod are located below the top surface of the seat frame connecting plate, and because the whole position of the first connecting rod is lower, when the stretching device is in a contracted state, the rod body of the transmission connecting rod is lower than the top surface of the seat frame connecting plate, and when the stretching device is switched from the contracted state to the stretched state, the first connecting rod rotates downwards, the rod body of the transmission connecting rod is lower than the top surface of the seat frame connecting plate, namely, the hinge point of the first connecting rod and the transmission connecting rod is not higher than the top surface of the seat frame connecting plate in any way, and can not be contacted with the cushion, so that damage to the seat cushion is avoided when the stretching device works. It will be appreciated that when the extension device is in the extended state, the hinge point of the transmission link and the first link is at the highest point, and this hinge point will not contact the seat cushion at this time, and when the extension device is in the other state, this hinge point will not contact the seat cushion any more.
Preferably, the first connecting rod comprises a first connecting part and a second connecting part which are connected, an included angle between the first connecting part and the second connecting part is not smaller than 90 degrees, the upper end of the first connecting part is hinged with the lower end of the first connecting rod, and the lower end of the second connecting part is hinged with the lower end of the connecting seat.
Preferably, the transmission connecting rod comprises a first horizontal section, a bending section and a second horizontal section which are connected in sequence, wherein the first horizontal section is positioned on the outer side of the first connecting rod, and the end part of the first horizontal section is hinged with the first connecting rod. By arranging the bending section, the installation space is reserved for the second connecting structure, and the compact layout of the stretching device is realized.
Preferably, the stretching device further comprises a leg supporting mechanism, the leg supporting mechanism comprises two leg supporting components which are symmetrically arranged on two sides of the mounting base, the leg supporting components comprise a plurality of groups of cross connecting rods which are sequentially connected, the leg supporting components are rotationally connected with the fixing plate and the seat frame connecting plate through a second connecting structure, and the cross connecting rods comprise a first rod body and a second rod body which are mutually hinged. When the extension device is switched from the unfolded state to the contracted state, the plurality of cross links of the leg support mechanism synchronously rotate to be completely contracted.
Preferably, the second connecting structure comprises a V-shaped rocker arm and a second connecting rod, the V-shaped rocker arm comprises an upper rocker arm and a lower rocker arm, the upper rocker arm is hinged with the side wall of the front end of the seat frame connecting plate, the lower rocker arm is hinged with a first rod body of a cross connecting rod close to the second connecting structure, a second rod body of the cross connecting rod close to the second connecting structure is hinged with the end part of the lower rocker arm, and the front end of the second connecting rod is hinged with the middle part of the V-shaped rocker arm. The second connecting rod is hinged with the middle part of the V-shaped rocker arm, so that the connecting plate can conveniently drive the V-shaped rocker arm to rotate up and down; by arranging the V-shaped rocker arm, the V-shaped rocker arm is convenient to drive the leg support assembly to shrink/expand. Specifically, when the V-shaped rocker arm rotates upward, the leg support assembly contracts, and when the V-shaped rocker arm rotates downward, the leg support assembly expands.
Preferably, the stretching device further comprises a limiting mechanism, the limiting mechanism comprises limiting components which are symmetrically arranged left and right, the limiting components are in one-to-one correspondence with the fixing plates, the limiting components comprise limiting plates and third connecting rods, kidney-shaped grooves are formed in the limiting plates along the length direction of the limiting plates, limiting shafts which are matched with the kidney-shaped grooves are arranged on the corresponding fixing plates, the second connecting rods are hinged to the middle parts of the corresponding limiting plates, the third connecting rods are located between the fixing plates and the second connecting rods, the upper ends of the third connecting rods are hinged to corresponding seat frame connecting plates, and the lower ends of the third connecting rods are hinged to the rear ends of the limiting plates. When the stretching device is in a contracted state in actual operation, the limiting shaft is positioned at the forefront end of the kidney-shaped groove; when the stretching device is in the stretching state, the limiting shaft is positioned at the rearmost end of the kidney-shaped groove, namely, the limiting shaft limits the contraction/stretching range of the stretching device through the length of the kidney-shaped groove.
Preferably, the stretching device further comprises a back supporting mechanism, the back supporting mechanism comprises left and right symmetrically arranged back supporting components, the back supporting components comprise a back mounting frame and a fourth connecting rod, the back mounting frame is hinged to the seat frame connecting plate, the upper end of the fourth connecting rod is hinged to the back mounting frame, and the lower end of the fourth connecting rod is hinged to the fixing plate. When the stretching device is switched from the unfolding state to the shrinking state, the connecting plate moves forwards to drive the backrest mounting frame and the fourth connecting rod to rotate forwards, so that the backrest supporting mechanism tends to be vertical.
Preferably, the electric push rod comprises a driving motor and a telescopic rod, wherein the front end of the telescopic rod is hinged to the middle of the driving rod, and the driving motor is hinged to the middle of the mounting rod.
The principle and beneficial effects of the utility model adopting the technical scheme are as follows:
through setting up first connecting rod and fixed plate articulated, transmission connecting rod upper end and seat frame connecting plate lateral wall articulated, first connecting rod and transmission connecting rod set up respectively in the actuating lever upper and lower both ends that is to say for first connecting rod and transmission connecting rod's position is lower, has realized the extension device during operation, and the pin joint of first connecting rod and transmission connecting rod can not exceed the seat frame connecting plate, has ensured that the extension device can not cause the damage to the cushion on the seat frame at the during operation, has prolonged the life of the cushion of electronic sofa.
Drawings
FIG. 1 is a schematic illustration of an extension device in a contracted state;
FIG. 2 is a side view of the extension device in a contracted state;
FIG. 3 is a schematic view of the mounting base and seat support mechanism;
FIG. 4 is a schematic view of the mounting base, the connecting base, and the first link;
FIG. 5 is a schematic view of a first link, a connecting seat, and a second connecting structure;
FIG. 6 is a schematic illustration of a drive link;
FIG. 7 is a side view of the bezel interface and the spacing mechanism;
FIG. 8 is a schematic view of another angle of the bezel interface and the stop mechanism;
FIG. 9 is a schematic view of a spacing mechanism;
FIG. 10 is a schematic view of a third link;
FIG. 11 is a schematic view of the expansion device in an expanded state.
The reference numerals in the drawings are as follows:
1. a mounting base; 2. a driving rod; 3. a mounting rod; 4. a fixing plate; 5. a first connection structure; 6. a first link; 7. a connecting seat; 8. a seat frame connecting plate; 9. a transmission link; 10. a leg support assembly; 12. an electric push rod; 13. a first connection portion; 14. a second connecting portion; 15. a first horizontal segment; 16. bending sections; 17. a second horizontal segment; 18. a first rod body; 19. a second rod body; 20. a V-shaped rocker arm; 21. an upper rocker arm; 22. a lower rocker arm; 23. a second link; 24. a limiting plate; 25. a third link; 26. a kidney-shaped groove; 28. a backrest mounting frame; 29. a fourth link; 30. a foot rest mount; 31. and a limiting shaft.
Description of the embodiments
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.
The specific embodiments of the present utility model are as follows:
as shown in fig. 1 to 11, the present utility model provides an extension device of an electric sofa, comprising:
the installation base 1 comprises an installation rod 3 and a fixing plate 4 which is arranged on the installation rod 3 in bilateral symmetry, wherein the fixing plate 4 extends forwards, the front end of the fixing plate 4 is provided with a connecting seat 7, and the connecting seat 7 extends downwards.
The driving mechanism comprises an electric push rod 12 and a driving rod 2, wherein the driving rod 2 is positioned in front of the mounting rod 3 and is arranged in parallel with the mounting rod 3, the left end and the right end of the driving rod 2 are in one-to-one correspondence with the two connecting seats 7, the end part of the driving rod 2 is connected with the corresponding connecting seats 7 through a first connecting rod 6, the side wall of the upper end of the first connecting rod 6 is fixedly connected with the driving rod 2, the lower end of the first connecting rod 6 is hinged with the lower end of the corresponding connecting seat 7, one end of the electric push rod 12 is hinged with the driving rod 2, and the other end of the electric push rod is hinged with the mounting rod 3.
The seat supporting mechanism comprises two seat frame connecting plates 8 used for connecting seat frames, the two seat frame connecting plates 8 are arranged in a bilateral symmetry mode, the seat frame connecting plates 8 are arranged in the front-back direction and located above the installation base 1, the seat frame connecting plates 8 are rotationally connected with the driving rod 2 through a transmission connecting rod 9, the upper ends of the transmission connecting rods 9 are hinged with the side walls of the front ends of the seat frame connecting plates 8, the lower ends of the transmission connecting rods 9 are hinged with the first connecting rods 6, and the heights of the transmission connecting rods 9 are always lower than the top surfaces of the seat frame connecting plates 8 when the transmission connecting rods 9 rotate.
The leg supporting mechanism comprises two leg supporting components 10 which are symmetrically arranged on two sides of the mounting base 1, the leg supporting components 10 comprise a plurality of groups of cross connecting rods which are sequentially connected, the leg supporting components 10 are rotationally connected with the fixing plate 4 and the seat frame connecting plate 8 through a second connecting structure, the second connecting structure comprises a V-shaped rocker arm 20 and a second connecting rod 23, the V-shaped rocker arm 20 comprises an upper rocker arm 21 and a lower rocker arm 22, the upper rocker arm 21 is hinged with the side wall of the front end of the seat frame connecting plate 8, the lower rocker arm 22 is hinged with a first rod body 18 of the cross connecting rod which is close to the second connecting structure, and the front end of the second connecting rod 23 is hinged with the middle part of the V-shaped rocker arm 20.
And the limiting mechanism is used for limiting the contraction/expansion range of the seat support mechanism and the leg support mechanism.
In this embodiment, the extension device has an extended state and a contracted state, and the extension device is switched by the driving mechanism, and when the extension device is switched from the extended state to the contracted state, the plurality of cross links of the leg support mechanism synchronously rotate to be fully contracted, and the seat frame connecting plate 8 descends. Specifically, the electric push rod 12 pushes the driving rod 2 to be far away from the mounting rod 3, the first connecting rod 6 rotates downwards and drives the transmission connecting rod 9 to rotate downwards, the transmission connecting rod 9 pulls the corresponding seat frame connecting plate 8 to descend, and the seat frame connecting plate 8 drives the plurality of cross connecting rods to synchronously rotate to completely shrink through the second connecting structure. Wherein, the pin joint of first connecting rod 6 and connecting seat 7 is located the lower extreme of first connecting rod 6, the pin joint of transmission connecting rod 9 and seat frame connecting plate 8, the pin joint of first connecting rod 6 all is located the below of seat frame connecting plate 8 top surface, because the overall position of first connecting rod 6 is lower, when the extension device is in the shrink state, the body of rod of transmission connecting rod 9 is less than the top surface of seat frame connecting plate 8, when the extension device switches from the shrink state to the expansion state, first connecting rod 6 is the rotation down, the body of rod of transmission connecting rod 9 can be lower relative seat frame connecting plate 8 top surface, the pin joint of first connecting rod 6 and transmission connecting rod 9 can not be higher than the top surface of seat frame connecting plate 8, can not produce the contact with the cushion more, avoided the extension device during operation to cause the damage to the seat cushion.
It will be appreciated that the contracted state corresponds approximately to the sitting posture of the person and the expanded state corresponds approximately to the lying posture of the person, and that the extension device can lock the seat support mechanism and the leg support mechanism in any position within the limit range, and that the contracted state and the expanded state are only used to indicate the limit positions of the extension device. The second connecting rod 23 is hinged with the middle part of the V-shaped rocker arm 20, so that the seat frame connecting plate 8 can conveniently drive the V-shaped rocker arm 20 to rotate up and down; by providing the V-shaped rocker arm 20, the V-shaped rocker arm 20 facilitates the retraction/deployment of the leg support assembly 10. Specifically, when the V-shaped swing arm 20 is rotated upward, the leg support assembly 10 is contracted, and when the V-shaped swing arm 20 is rotated downward, the leg support assembly 10 is unfolded, and in this embodiment, the upper swing arm 21 and the lower swing arm 22 are substantially uniform in length. It will be appreciated that when the extension device is switched from the contracted state to the expanded state, the electric push rod 12 pulls the driving rod 2 to approach the mounting rod 3, and the first connecting rod 6 and the connecting seat 7 work in opposite directions, which will not be described herein.
As shown in fig. 4 and 5, the first connecting rod 6 includes a first connecting portion 13 and a second connecting portion 14 connected to each other, an included angle between the first connecting portion 13 and the second connecting portion 14 is not smaller than 90 degrees, the transmission connecting rod 9 includes a first horizontal segment 15, a bending segment 16 and a second horizontal segment 17 connected in sequence, and the first horizontal segment 15 is located between the first connecting rod 6 and the upper rocker arm 21. By providing the bending section 16, it is achieved that installation space is yielded for the second connection structure. In the present embodiment, the angle between the first connecting portion 13 and the second connecting portion 14 is 110 degrees. It should be noted that, the included angle between the first connecting portion 13 and the second connecting portion 14 is smaller than 90 degrees, which affects the force transmission performance requirement, and further, the distance between the driving rod 2 and the mounting rod 3 is reduced, which is not in line with the design rules.
As shown in fig. 1, the cross-link includes a first rod body 18 and a second rod body 19 hinged to each other. In this embodiment, the head end of the first rod 18 is connected to the tail end of the second rod 19 of the adjacent cross link, and the head end of the second rod 19 is connected to the tail end of the first rod 18 of the adjacent cross link. When the leg support assembly 10 is needed to be described, the tail end of the first rod body 18 of the cross connecting rod at the rearmost end of the leg support assembly 10 is hinged with the seat frame connecting plate 8, the tail end of the second rod body 19 is hinged with the lower rocker arm 22 of the V-shaped rocker arm 20, and the foot rest mounting frame 30 for mounting the foot rest is arranged on the cross connecting rod at the foremost end of the leg support assembly 10.
As shown in fig. 5, 7 and 9, the limiting mechanism comprises limiting components which are symmetrically arranged left and right, the limiting components are in one-to-one correspondence with the fixed plates 4, the limiting components comprise limiting plates 24 and third connecting rods 25, waist-shaped grooves 26 are formed in the limiting plates 24 along the length direction of the limiting components, limiting shafts 31 which are matched with the waist-shaped grooves 26 are arranged on the corresponding fixed plates 4, the second connecting rods 23 are hinged to the middle parts of the corresponding limiting plates 24, the third connecting rods 25 are located between the fixed plates 4 and the second connecting rods 23, the upper ends of the third connecting rods 25 are hinged to the corresponding seat frame connecting plates 8, and the lower ends of the third connecting rods are hinged to the rear ends of the limiting plates 24. When the stretching device is in a contracted state in actual operation, the limiting shaft 31 is positioned at the forefront end of the kidney-shaped groove 26; when the extension device is in the extended state, the limiting shaft 31 is located at the rearmost end of the kidney-shaped groove 26, i.e. through the length of the kidney-shaped groove 26, to limit the contraction/expansion range of the extension device.
As shown in fig. 1, the stretching device further comprises a back support mechanism, the back support mechanism comprises back support components which are symmetrically arranged left and right, the back support components comprise a back mounting frame 28 and a fourth connecting rod 29, the back mounting frame 28 is hinged with the seat frame connecting plate 8, the upper end of the fourth connecting rod 29 is hinged with the back mounting frame 28, and the lower end of the fourth connecting rod 29 is hinged with the fixing plate 4. When the extension device is switched from the unfolded state to the contracted state, the seat frame connecting plate 8 moves forward to drive the backrest mounting frame 28 and the fourth connecting rod 29 to rotate forward, so that the backrest supporting mechanism tends to be vertical.
As shown in fig. 1, the electric putter 12 includes a driving motor and a telescopic rod, the front end of which is hinged to the middle of the driving rod 2, and the driving motor is hinged to the middle of the mounting rod 3. Through setting up the front end of telescopic link with the middle part of actuating lever 2 articulated, driving motor with the middle part of installation pole 3 articulated, electric putter 12 during operation, actuating lever 2 and installation pole 3 atress are even, have ensured the stability of telescopic link during operation.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (8)
1. An extension device for an electrically powered sofa, comprising:
the mounting base comprises a mounting rod and fixing plates which are symmetrically arranged on the mounting rod in a left-right mode, wherein the fixing plates extend forwards, connecting seats are arranged at the front ends of the fixing plates, and the connecting seats extend downwards;
the driving mechanism comprises an electric push rod and a driving rod, the driving rod is positioned in front of the mounting rod and is arranged in parallel with the mounting rod, the left end and the right end of the driving rod are in one-to-one correspondence with the two connecting seats, the end part of the driving rod is connected with the corresponding connecting seat through a first connecting rod, the side wall of the upper end of the first connecting rod is fixedly connected with the driving rod, the lower end of the first connecting rod is hinged with the lower end of the corresponding connecting seat, one end of the electric push rod is hinged with the driving rod, and the other end of the electric push rod is hinged with the mounting rod;
the seat supporting mechanism comprises two seat frame connecting plates for connecting seat frames, wherein the two seat frame connecting plates are arranged in bilateral symmetry, the seat frame connecting plates are arranged in the front-rear direction and are located above the installation base, the seat frame connecting plates are connected with the driving rods in a rotating mode through transmission connecting rods, the upper ends of the transmission connecting rods are hinged to the side walls of the front ends of the seat frame connecting plates, the lower ends of the transmission connecting rods are hinged to the upper ends of the first connecting rods, and when the transmission connecting rods rotate, the heights of the transmission connecting rods are always lower than the top surfaces of the seat frame connecting plates.
2. The stretching device of an electric sofa according to claim 1, wherein the first connecting rod comprises a first connecting portion and a second connecting portion which are connected, an included angle between the first connecting portion and the second connecting portion is not smaller than 90 degrees, an upper end of the first connecting portion is hinged to a lower end of the first connecting rod, and a lower end of the second connecting portion is hinged to a lower end of the connecting seat.
3. The stretching device of an electric sofa according to claim 1, wherein the transmission connecting rod comprises a first horizontal section, a bending section and a second horizontal section which are connected in sequence, the first horizontal section is located on the outer side of the first connecting rod, and the end portion of the first horizontal section is hinged with the first connecting rod.
4. The stretching device of an electric sofa according to claim 1, further comprising a leg supporting mechanism, wherein the leg supporting mechanism comprises two leg supporting components which are symmetrically arranged on two sides of the installation base, the leg supporting components comprise a plurality of groups of cross connecting rods which are sequentially connected, the leg supporting components are rotationally connected with the fixing plate and the seat frame connecting plate through a second connecting structure, and the cross connecting rods comprise a first rod body and a second rod body which are mutually hinged.
5. The stretching device of the electric sofa according to claim 4, wherein the second connecting structure comprises a V-shaped rocker arm and a second connecting rod, the V-shaped rocker arm comprises an upper rocker arm and a lower rocker arm, the upper rocker arm is hinged with a side wall of the front end of the seat frame connecting plate, the lower rocker arm is hinged with a first rod body of the cross connecting rod close to the second connecting structure, the second rod body of the cross connecting rod close to the second connecting structure is hinged with the end part of the lower rocker arm, and the front end of the second connecting rod is hinged with the middle part of the V-shaped rocker arm.
6. The stretching device of the electric sofa according to claim 5, further comprising a limiting mechanism, wherein the limiting mechanism comprises limiting components which are symmetrically arranged left and right, the limiting components are in one-to-one correspondence with the fixing plates, the limiting components comprise limiting plates and third connecting rods, waist-shaped grooves are formed in the limiting plates along the length direction of the limiting plates, limiting shafts matched with the waist-shaped grooves are arranged on the corresponding fixing plates, the second connecting rods are hinged with the middle parts of the corresponding limiting plates, the third connecting rods are located between the fixing plates and the second connecting rods, the upper ends of the third connecting rods are hinged with corresponding seat frame connecting plates, and the lower ends of the third connecting rods are hinged with the rear ends of the limiting plates.
7. The stretching device of the electric sofa according to claim 1, further comprising a back support mechanism, wherein the back support mechanism comprises left and right symmetrically arranged back support components, the back support components comprise a back mounting frame and a fourth connecting rod, the back mounting frame is hinged with the seat frame connecting plate, the upper end of the fourth connecting rod is hinged with the back mounting frame, and the lower end of the fourth connecting rod is hinged with the fixing plate.
8. The stretching device of the electric sofa according to claim 1, wherein the electric push rod comprises a driving motor and a telescopic rod, the front end of the telescopic rod is hinged with the middle part of the driving rod, and the driving motor is hinged with the middle part of the mounting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320883221.2U CN220236481U (en) | 2023-04-17 | 2023-04-17 | Stretching device of electric sofa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320883221.2U CN220236481U (en) | 2023-04-17 | 2023-04-17 | Stretching device of electric sofa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220236481U true CN220236481U (en) | 2023-12-26 |
Family
ID=89229170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320883221.2U Active CN220236481U (en) | 2023-04-17 | 2023-04-17 | Stretching device of electric sofa |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220236481U (en) |
-
2023
- 2023-04-17 CN CN202320883221.2U patent/CN220236481U/en active Active
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