CN116035382A - Mechanical stretching device of functional sofa with zero wall function - Google Patents

Abstract

The application relates to a functional sofa mechanical stretching device with zero wall function relates to the technical field of functional sofa, including iron stand, seat frame, drive assembly, force application mechanism includes: the back insert is rotatably arranged on the seat frame through the supporting piece and the adjusting piece and is used for installing the backrest; the connecting piece is rotatably arranged on the iron frame; the force application assembly is arranged on the seat frame, is rotationally connected with the connecting piece and is used for driving the backrest to move. The backrest is kept away through rotating the space, so that the probability of collision between the backrest and the wall surface is reduced, the backrest can be installed against the wall surface when the sofa can be installed, the space utilization rate of the sofa is improved, the stability of the sofa is improved, and the use experience of the sofa is improved.

Description

Mechanical stretching device of functional sofa with zero wall function

Technical Field

The application relates to the technical field of functional sofas, in particular to a functional sofa mechanical stretching device with a zero wall function.

Background

The current multifunctional sofa generally comprises three different states of sitting posture, TV posture and lying posture in order to improve the use experience of people.

The existing sofa generally comprises a seat frame movably arranged on an iron frame and a backrest movably arranged on the seat frame, a driving assembly used for moving the seat frame and the backrest is further arranged on the iron frame, the driving assembly is started to enable the seat frame to move obliquely downwards, the sofa is converted into a TV pose from a sitting pose, then the driving assembly is continuously started to enable the seat frame to move obliquely upwards, the backrest is enabled to rotate downwards to lay down the backrest, and accordingly the sofa is converted into a lying pose from the TV pose.

The seat frame upwards moves and can drive the backrest to rotate, so that the seat frame downwards moves and can also drive the backrest to rotate at a certain angle, the rotating point of the backrest is generally positioned at the bottom end of the backrest and the backrest is higher, so that the top end of the backrest is easy to rotate out of the sofa in the rotating process and collides with the wall surface, the backrest can be kept away from the wall surface when the multifunctional sofa is placed, the space utilization rate of the sofa is reduced, and meanwhile, the sofa is not abutted against the wall surface for positioning after being installed, so that the stability of the sofa is reduced, and the use experience of the sofa is reduced.

Disclosure of Invention

In order to improve the use experience of sofa, the application provides a functional sofa mechanical stretching device with zero wall function.

The application provides a functional sofa mechanical stretching device with zero wall function adopts following technical scheme:

the utility model provides a functional sofa mechanical stretching device with zero wall function, includes iron stand, swing joint seat frame on the iron stand, sets up on the iron stand and is used for driving the drive assembly of seat frame motion, be provided with the force application mechanism that is used for driving the back motion on the seat frame, force application mechanism includes:

the back insert is rotatably arranged on the seat frame through the supporting piece and the adjusting piece and is used for installing the backrest;

the connecting piece is rotatably arranged on the iron frame;

and the force application assembly is arranged on the seat frame, is rotationally connected with the connecting piece and is used for driving the backrest to move.

By adopting the technical scheme, the seat frame, the supporting piece, the adjusting piece and the back insert are matched to form a structure similar to a four-bar linkage, so that the back insert is supported, the force application component is used for positioning the backrest position, and the force application component is used for driving the backrest to move;

when the sitting posture is converted into the TV posture, the driving assembly starts to drive the seat frame to move downwards obliquely and far away from the wall surface, the seat frame moves to drive the structure positioned on the seat frame and the backrest to move downwards obliquely and far away from the wall surface simultaneously, so that the force application assembly moves far away from the wall surface and drives the connecting piece and the iron frame to rotate relatively to avoid the position, the force application assembly does not rotate, and therefore the backrest does not rotate but only moves far away from the wall surface, and a rotating space is formed between the backrest and the wall surface, and the TV posture is converted from the sitting posture into the TV posture.

When the TV posture is converted into the lying posture, the connecting piece is rotated to the limit position, the driving component is continuously started to drive the seat frame to move upwards and away from one side of the wall surface, so that the component positioned on the seat frame and the backrest move upwards and away from one side of the wall surface, the force application component moves upwards in an inclined manner and rotates under the pulling of the connecting piece, and the force application component rotates to drive the backrest to rotate so as to realize the falling, thereby converting the TV posture into the lying posture; therefore, the backrest is kept away through the rotating space, so that the probability of collision between the backrest and the wall surface is reduced, the backrest can be installed against the wall surface when the sofa can be installed, the space utilization rate of the sofa is improved, the stability of the sofa is improved, the use experience of the sofa is improved, the backrest is driven to move through the rotating structure, the probability of failure caused by the use of the sliding structure is reduced, the stability of the sofa is further improved, and the use experience of the sofa is improved.

Optionally, the force application assembly includes:

the force application plate is rotatably arranged on the seat frame through a rotating shaft and is rotatably connected with the connecting piece through a rotating column;

the force application piece is rotatably arranged on the force application plate through a rotating rod and is rotatably connected with the back insert through a rotating rod.

Through adopting above-mentioned technical scheme, the connecting piece rotates to extreme position back and does not continue to rotate, and the application of force board takes place to rotate under the connecting piece pulling, and the application of force board rotates and drives back plug-in components through the application of force piece and rotate to this realizes laying back.

Optionally, be provided with on back of body plug-in components and the application of force board and carry out spacing subassembly when being in position of sitting and lying to the sofa, spacing subassembly includes:

the first limiting column is arranged on the back insert, the second limiting column is arranged on the force application plate and is positioned between the back insert and the seat frame, and the first limiting column and the second limiting column are respectively positioned at two sides of the support piece; when the sofa is in sitting position, the first limit column and the second limit column are respectively propped against the supporting piece and the back insert for positioning, and when the sofa is in lying position, the first limit column and the second limit column are respectively propped against the supporting piece and the seat frame for positioning.

Through adopting above-mentioned technical scheme, first spacing post and second spacing post are supported respectively and are pressed on support piece and back of the body plug-in components and fix a position, when the in-process of converting from the position of sitting to lying, the regulating part rotates and drives back of the body plug-in components and first spacing post upwards rotates and keep away from support piece, and first spacing post rotates around support piece and back of the body plug-in components articulated department moreover, the application of force board drives the second spacing post and rotates downwards and keep away from back of the body plug-in components and be close to the seat frame simultaneously, when converting to lying the position, first spacing post rotates to the opposite side of support piece and back of the body plug-in components articulated department, consequently first spacing post supports to press on support piece, and the second spacing post supports to press on the seat frame, so as to realize that the sofa is in position of sitting and lying the position and is spacing.

Optionally, the pivot is with application of force board and first linkage portion and second linkage portion, first linkage portion and second linkage portion respectively with application of force spare and connecting piece rotate to be connected, second linkage portion length is greater than the length of connecting piece.

Optionally, the adjusting part is located the support piece and keeps away from wall one side, the application of force subassembly includes:

the first linkage plate is rotatably arranged on the seat frame and is rotatably connected with the connecting piece;

the two ends of the first pushing plate are respectively connected with the adjusting piece and the first linkage plate in a rotating way.

By adopting the technical scheme, the connecting piece pulls the first linkage plate to rotate, the first linkage plate rotates to drive the adjusting piece to rotate through the first pushing plate, and the adjusting piece rotates to pull the back insert to rotate, so that the backrest is laid down;

the adjusting piece is positioned on one side of the supporting piece far away from the wall surface, so that when the first pushing plate is hinged with the supporting piece, the first pushing plate is easy to collide with the adjusting piece when rotating, the first pushing plate can form a bending part to avoid, the bending part can reduce the strength of the first pushing plate, and the production cost is increased; and the seat frame moves and can pull the regulating part to rotate away from the supporting part, and the first push plate is hinged with the regulating part, so that the first push plate can not touch the supporting part when pulling the regulating part to rotate, the first push plate does not need to form a bending part to avoid the seat, the stability of the sofa is improved, and meanwhile, the production cost of the sofa is also reduced.

Optionally, the adjusting part is arranged on the seat frame and provided with an arc-shaped slideway, and the back insert is provided with a sliding part sliding on the slideway.

Through adopting above-mentioned technical scheme, the slide is directed the motion of back of body plug-in components to make the back of body plug-in components more stable when moving, can move according to the moving track that designs, improved the stability of sofa, improved the use experience of sofa.

Optionally, the force application assembly includes:

the second linkage plate is rotatably arranged on the seat frame and is rotatably connected with the connecting piece;

and two ends of the second pushing plate are respectively connected with the back insert and the second linkage plate in a rotating way, and the hinge points of the second pushing plate and the support piece are overlapped with the hinge point of the back insert.

By adopting the technical scheme, the connecting piece pulls the second linkage plate to rotate, and the second linkage plate rotates to drive the back insert to rotate through the second pushing plate, so that the backrest is laid down; simultaneously, the second pushing plate pulls the back insert to rotate, and simultaneously pulls the support piece to rotate, and the hinge point of the second pushing plate and the support piece is overlapped with the hinge point of the back insert, so that the synchronism of the second pushing plate, the back insert and the support piece in movement is further improved, and the use experience of the sofa is improved.

Optionally, the force application assembly includes:

the third linkage plate is rotatably arranged on the seat frame and is rotatably connected with the connecting piece;

and two ends of the third pushing plate are respectively connected with the sliding piece and the third linkage plate in a rotating way.

By adopting the technical scheme, the connecting piece pulls the third linkage plate to rotate, the third linkage plate rotates to drive the sliding piece to move through the third pushing plate, and the sliding piece rotates under the action of the slideway when moving, so that the back insert is driven to rotate to realize the falling of the backrest; and the acting force of the third pushing plate directly acts on the movement point of the back insert, so that the loss of force is reduced, and the energy loss during pushing movement is reduced.

Optionally, the support piece and the second linkage plate are both provided with positioning columns, and when the sofa is in a lying position, the two positioning columns are both propped against the seat frame for positioning.

Through adopting above-mentioned technical scheme, the in-process of sofa conversion for lying the appearance, support piece and second linkage board rotate and drive the reference column and rotate downwards for the reference column supports to press and fixes a position on the seat frame, with this the position that realizes the back is fixed a position, has improved stability when sofa operates, has improved the use experience of sofa.

Optionally, the sliding piece is a roller rolling on the slideway.

By adopting the technical scheme, the friction force between the sliding piece and the slideway is reduced, the abrasion probability of the sliding piece is reduced, the stability of the sliding piece in operation is improved, and the noise probability caused by the damage of the sliding piece is also reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

the backrest is kept away through the rotation space, so that the probability of collision between the backrest and the wall surface is reduced, the backrest can be abutted to the wall surface for installation when the sofa can be installed, the space utilization rate of the sofa is improved, the stability of the sofa is improved, and the use experience of the sofa is improved.

Drawings

FIG. 1 is a schematic view of a sofa in a sitting position according to the first embodiment of the present application;

FIG. 2 is a schematic view of the structure of the sofa in the TV position in the first embodiment of the present application;

FIG. 3 is a schematic structural view of a spacing assembly for a sofa in a lying position according to the first embodiment of the present application;

FIG. 4 is a schematic view of the structure of the sofa in the lying position according to the first embodiment of the present application;

FIG. 5 is a schematic view of a limiting assembly for a sofa in a sitting position according to the first embodiment of the present application;

FIG. 6 is a schematic diagram of a force application assembly for a sofa in a sitting position according to a second embodiment of the present disclosure;

FIG. 7 is a schematic structural view of a force application assembly when a sofa is in a lying position in a second embodiment of the present application;

FIG. 8 is a schematic view of a force application assembly for a sofa in a sitting position according to a third embodiment of the present disclosure;

FIG. 9 is a schematic structural view of a force application assembly for a sofa in a lying position according to a third embodiment of the present application, mainly showing a positioning column;

FIG. 10 is a schematic structural view of a force application assembly for a sofa in a lying position according to a third embodiment of the present application;

FIG. 11 is a schematic view of a force application assembly for a sofa in a sitting position according to a fourth embodiment of the present application;

fig. 12 is a schematic structural view of a force application assembly when the sofa is in a lying position in the fourth embodiment of the present application.

Reference numerals: 1. an iron stand; 11. a seat frame; 13. a carrying plate; 14. a rotating shaft; 2. a force application mechanism; 21. a support; 22. an adjusting member; 23. a back insert; 24. a first mounting portion; 25. a second mounting portion; 26. a connecting piece; 27. a slideway; 28. a sliding member; 29. a mounting column; 3. a force application assembly; 32. a force application plate; 33. a force application member; 331. a bending part; 34. a first linkage part; 341. a rotating rod; 35. a second linkage part; 351. rotating the column; 36. a rotating lever; 4. a drive assembly; 5. a limit component; 51. a first limit post; 52. the second limit column; 53. a first limit groove; 54. the second limit groove; 61. a first linkage plate; 62. a first push plate; 71. a second linkage plate; 72. a second pushing plate; 81. a third linkage plate; 82. a third pushing plate; 9. and positioning columns.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-12.

The embodiment of the application discloses a functional sofa mechanical stretching device with a zero wall leaning function.

Example 1

Referring to fig. 1, the mechanical stretching device of the functional sofa with the function of zero wall leaning comprises an iron frame 1, a backrest abutting against a wall surface and a seat frame 11 movably connected to the iron frame 1, wherein a driving component 4 for driving the seat frame 11 to move is arranged on the iron frame 1, and a force application mechanism 2 for driving the backrest to move is arranged on the seat frame 11.

Referring to fig. 1, the driving assembly 4 includes a driving seat and an electric push rod, wherein the driving seat is rotatably arranged on the iron stand 1 and is positioned at one side of the seat frame 11 close to the wall surface; the electric push rod is fixedly arranged on the driving seat, the piston rod of the electric push rod is connected with the seat frame 11 and is used for driving the seat frame 11 to move, when the seat frame 11 is installed and changed into a TV posture from a sitting posture, the seat frame 11 is obliquely downwards moved away from a wall surface, and when the seat frame 11 is changed into a lying posture from the TV posture, the seat frame 11 is obliquely upwards moved away from the wall surface.

Referring to fig. 1, the force application mechanism 2 includes a back insert 23, a bearing plate 13 is fixedly mounted on an upper surface of one end of the seat frame 11 near the wall surface, the back insert 23 is rotatably mounted on the bearing plate 13 through a supporting member 21 and an adjusting member 22, bottom ends of the supporting member 21 and the adjusting member 22 are rotatably mounted on the bearing plate 13, a hinge point of the adjusting member 22 and the bearing plate 13 is located below a hinge point of the supporting member 21 and the bearing plate 13, top ends of the supporting member 21 and the adjusting member 22 extend above the bearing plate 13, top ends of the supporting member 21 are located above the adjusting member 22, and the supporting member 21 is located on one side of the adjusting member 22 near the wall surface.

Referring to fig. 1 and 2, a rotation shaft is fixedly installed at the top end of a support member 21, the bottom end of a back insert 23 is rotatably installed at the top end of an adjusting member 22, the back insert 23 is obliquely upwards arranged and rotatably connected with the rotation shaft, meanwhile, the top end of the back insert 23 extends above the support member 21, and the support member 21 and the adjusting member 22 are respectively positioned at two opposite sides of the back insert 23; the rotating shaft divides the back insert 23 into a first mounting part 24 and a second mounting part 25, the bottom end of the second mounting part 25 is rotationally connected with the adjusting piece 22, the length of the second mounting part 25 is smaller than that of the first mounting part 24, and the first mounting part 24 is used for mounting a backrest; the support 21, the adjustment member 22 and the back insert 23 cooperate to form a quadrilateral structure with axes of rotation all parallel.

Referring to fig. 1 and 3, the force application mechanism 2 further includes a connecting member 26 and a force application assembly 3, wherein one end of the connecting member 26 is rotatably mounted on the iron stand 1 and located right below the bearing plate 13, and the other end of the connecting member 26 is disposed obliquely upward and toward a side far away from the wall surface.

Referring to fig. 1 and 4, the force application assembly 3 is disposed on the seat frame 11 and is rotatably connected with the connecting piece 26, the force application assembly 3 is used for driving the backrest to move, the force application assembly 3 includes a force application plate 32 and a force application piece 33, a rotating shaft 14 is fixedly mounted on a side wall of the bearing plate 13 and located on a side of the supporting piece 21 close to the wall surface, the force application plate 32 is rotatably mounted on the rotating shaft 14, the rotating shaft 14 divides the force application plate 32 into a first linkage part 34 and a second linkage part 35, one end of the first linkage part 34 away from the rotating shaft 14 extends obliquely upwards to a side of the back insert 23 away from the wall surface and is fixedly provided with a rotating rod 341, and one end of the second linkage part 35 away from the rotating shaft 14 extends obliquely downwards to a side close to the iron frame 1 and is fixedly provided with a rotating column 351, and therefore the rotating rod 341 and the rotating column 351 are located on a side of the rotating shaft 14 away from the wall surface.

Referring to fig. 1, 2 and 4, one end of the urging member 33 is rotatably mounted on the rotating lever 341, and the urging member 33 is located between the urging plate 32 and the back insert 23, and the other end of the urging member 33 is rotatably connected to the second mounting portion 25 through the rotating lever 36, and the rotating lever 36 and the regulating member 22 are located on the same side of the back insert 23.

Referring to fig. 1 and 4, the end of the force application member 33 away from the rotating rod 36 is provided with a bending portion 331 formed by punching and bending integrally, the bending portion 331 is away from the back insert 23 and is used for avoiding the adjusting member 22 when rotating, so that the probability of collision between the force application member 33 and the adjusting member 22 when rotating is reduced, and all rotation direction axes of the connecting member 26, the force application plate 32, the force application member 33 and the back insert 23 are parallel.

Referring to fig. 3 and 5, the back insert 23 and the force application plate 32 are provided with a limiting assembly 5 for limiting the sofa in sitting and lying postures, the limiting assembly 5 comprises a first limiting column 51 and a second limiting column 52, and the first limiting column 51 is fixedly mounted on the second mounting portion 25 and is located between the supporting member 21 and the adjusting member 22; the second limiting column 52 is fixedly installed on the first linkage part 34 and located between the first installation part 24 and the bearing plate 13, and meanwhile, the first limiting column 51 and the second limiting column 52 are respectively located on two sides of the rotating shaft and the supporting piece 21; when the sofa is in a sitting position, the first limiting post 51 is pressed against the supporting piece 21, and the second limiting post 52 is pressed against the first mounting portion 24 for positioning.

Referring to fig. 4 and 5, when the sofa is in a lying position, the first limiting post 51 is pressed against the supporting member 21, the second limiting post 52 is pressed against the carrying plate 13 to position, meanwhile, two first limiting grooves 53 which can be attached to the first limiting post 51 are spaced apart on the supporting member 21, and a second limiting groove 54 which can be attached to the second limiting post 52 is formed on the carrying plate 13. When the sitting posture is converted into the lying posture, the adjusting piece 22 drives the second mounting portion 25 and the first limiting post 51 to rotate upwards, so that the first limiting post 51 is far away from the supporting piece 21, the first mounting portion 24 and the backrest rotate downwards, and meanwhile, the first linkage portion 34 rotates downwards to drive the second limiting post 52 to be close to the bearing plate 13, so that the first limiting post 51 is pressed onto the first limiting groove 53 located above from the first limiting groove 53 located below, and the second limiting post 52 is far away from the first mounting portion 24 and is pressed onto the second limiting groove 54, and therefore limiting of the sofa position is achieved.

The working principle of the embodiment of the application is as follows:

the electric push rod is started to drive the seat frame 11, the bearing plate 13 and the parts positioned on the bearing plate 13 to move obliquely downwards and far away from one side of the wall surface, so that the force application plate 32 moves to pull the top end of the connecting piece 26 to rotate downwards to avoid the position, the seat frame 11 is realized to drive the backrest to move instead of rotating, the seat frame is converted from the sitting posture to the TV posture, and the backrest is far away from the wall surface to form a rotating space.

The electric push rod continues to move to drive the seat frame 11 to move obliquely upwards and far away from the wall surface, and the connecting piece 26 is rotated to the limit position and cannot rotate, so that the force application plate 32 is pulled to rotate around the rotating shaft 14 under the limit of the connecting piece 26, the force application plate 32 drives the back insert 23 to rotate through the force application piece 33, and accordingly the backrest is laid down, the purpose of converting a TV pose into a lying pose is achieved, the backrest is driven to be far away from the wall surface in advance before the lying pose is adjusted to form a rotating space, the probability of collision between the backrest and the wall surface is reduced, and the use experience of the sofa is improved.

Example 2

Referring to fig. 1 and 6, the present embodiment is different from embodiment 1 in that the urging assembly 3 includes a first linkage plate 61 and a first urging plate 62.

Referring to fig. 6 and 7, the first link plate 61 is rotatably installed on the rotation shaft 14 with the top end of the first link plate 61 being inclined upward and the bottom end being inclined downward, both ends of the first link plate 61 being inclined toward the side near the regulating member 22; the bottom of the first linkage plate 61 is rotatably connected with the top of the connecting piece 26, one end of the first pushing plate 62 is rotatably installed on the top of the first linkage plate 61, the other end of the first pushing plate 62 extends to the adjusting piece 22 and is rotatably connected with the adjusting piece 22, and meanwhile, the hinge point of the first pushing plate 62 and the adjusting piece 22 is located between the hinge point of the adjusting piece 22 and the two hinge points of the bearing plate 13 and the back insert 23.

Referring to fig. 1 and 6, after the seat frame 11 moves to the limit position, the connecting piece 26 pulls the bottom end of the first linkage plate 61 to be upward and the top end of the first linkage plate 61 to be downward, and the top end of the first linkage plate 61 is rotated downward to pull the adjusting piece 22 to rotate through the first pushing plate 62, the adjusting piece 22 rotates to pull the back insert 23 and the supporting piece 21 to rotate simultaneously, so that the backrest rotates to be laid down, the first pushing plate 62 is positioned on one side of the supporting piece 21 and the adjusting piece 22 away from the wall surface, and in the process that the backrest is away from the wall surface, the first pushing plate 62 does not collide with the supporting piece 21 during rotation, so that a structure for avoiding the first pushing plate 62 is not needed, the strength of the first pushing plate 62 is improved, the sofa using experience is improved, and meanwhile the production cost of the sofa is reduced.

The working principle of the embodiment of the application is as follows:

the first linkage plate 61 of connecting piece 26 pulling rotates, and first linkage plate 61 rotates and rotates simultaneously through first push plate 62 pulling back plug-in components 23 and support piece 21 to this realizes that the back rotates and falls the back, and first push plate 62 can not collide with support piece 21 moreover, consequently need not to set up the structure of keeping away the position to first push plate 62, has consequently improved the use experience of sofa, has also reduced sofa's manufacturing cost simultaneously.

Example 3

Referring to fig. 8, the difference between the present embodiment and embodiment 1 is that one end of the adjusting member 22 is fixedly mounted on the carrying plate 13, and the adjusting member 22 is provided with an arc-shaped slideway 27; the urging assembly 3 includes a second linkage plate 71 and a second push plate 72.

Referring to fig. 8 and 9, the back insert 23 is provided with a sliding member 28 slidably mounted on the slideway 27, the sliding member 28 may be a roller or a sliding block, hereinafter, the roller is illustrated as an example, the bottom end of the back insert 23 is fixedly provided with a horizontal mounting post 29, the roller is rotatably mounted on the mounting post 29 and rolls on the slideway 27 to be positioned, meanwhile, the supporting member 21 and the adjusting member 22 are respectively positioned at two sides of the back insert 23, and the supporting member 21 is used for positioning the roller to block the roller from being separated from the slideway 27.

Referring to fig. 8 and 10, the second link plate 71 is rotatably installed on the rotation shaft 14 with the top end of the second link plate 71 being inclined upward and the bottom end being inclined downward, both ends of the second link plate 71 being inclined toward the side near the regulating member 22; the bottom end of the second linkage plate 71 is rotatably connected with the top end of the connecting piece 26, one end of the second pushing plate 72 is rotatably installed on the top end of the second linkage plate 71, and the other end of the second pushing plate 72 extends to the rotating shaft and is rotatably connected with the rotating shaft, so that the hinge points of the second pushing plate 72 and the supporting piece 21 and the back insert 23 are overlapped, and meanwhile, the second linkage plate 71 and the second pushing plate 72 are located on one side, away from the back insert 23, of the supporting piece 21.

Referring to fig. 1 and 8, after the seat frame 11 moves to enable the connecting piece 26 to rotate to the limit position, the connecting piece 26 pulls the bottom end of the second linkage plate 71 to rotate upwards and the top end of the second linkage plate 71 to rotate downwards, the top end of the second linkage plate 71 pulls the back insert 23 and the supporting piece 21 to rotate simultaneously through the second pushing plate 72, and meanwhile, the back insert 23 rotates and pushes the roller to roll on the slideway 27 simultaneously, so that the back insert 23 and the backrest move according to a designed path, the stability of the backrest in running is improved, and the use experience of a sofa is improved; and the second pushing plate 72 and the adjusting piece 22 are positioned on two sides of the back insert 23, so that the second pushing plate 72 and the adjusting piece 22 cannot collide when rotating, and therefore a structure for avoiding the second pushing plate 72 is not needed, the strength of the second pushing plate 72 is improved, the use experience of a sofa is improved, and meanwhile, the production cost of the sofa is reduced.

Referring to fig. 8 and 9, horizontal positioning columns 9 are fixedly mounted on the side walls of the second linkage plate 71 and the second pushing plate 72, which are close to one side of the bearing plate 13, and when the sofa is converted into a lying position, the two positioning columns 9 are propped against the upper surface of the supporting plate to be positioned, and meanwhile, two attaching grooves attached to the positioning columns 9 are formed in the bearing plate 13; when the sofa is converted from the lying posture to the TV posture, the second linkage plate 71 and the second pushing plate 72 drive the two positioning posts 9 to rotate upwards and away from the bearing plate 13, so that the second linkage plate 71 and the second pushing plate 72 are unlocked.

The working principle of the embodiment of the application is as follows:

the connecting piece 26 pulls the second linkage plate 71 to rotate, and the second linkage plate 71 rotates and pulls the back insert 23 and the supporting piece 21 to rotate simultaneously through the second pushing plate 72, so that the back rotates to be laid down, and meanwhile, the back insert 23 drives the roller to roll on the slideway 27 to be supported, so that the back moves according to a designed path, the stability of the back in running is improved, and the use experience of a sofa is improved.

Example 4

Referring to fig. 8 and 11, the present embodiment is different from embodiment 3 in that the force application assembly 3 includes a third linkage plate 81 and a third pushing plate 82, the third linkage plate 81 is rotatably mounted on the rotating shaft 14, the top end of the third linkage plate 81 is inclined upward and the bottom end is inclined downward, and both ends of the third linkage plate 81 are inclined toward the side close to the adjusting member 22; the end of the mounting post 29 remote from the roller extends out of the back insert 23.

Referring to fig. 11 and 12, the bottom end of the third linkage plate 81 is rotatably connected with the top end of the connecting piece 26, one end of the third pushing plate 82 is rotatably mounted on the top end of the third linkage plate 81, the other end of the third pushing plate 82 is rotatably connected with one end of the mounting post 29 located outside the back insert 23, and meanwhile, the third linkage plate 81 and the third pushing plate 82 are both located on one side of the back insert 23 away from the adjusting piece 22; and the third linkage plate 81 and the supporting member 21 are fixedly provided with positioning columns 9 for positioning.

Referring to fig. 1 and 11, after the seat frame 11 moves to enable the connecting piece 26 to rotate to the limit position, the connecting piece 26 pulls the bottom end of the third linkage plate 81 to rotate upwards and the top end of the third linkage plate 81 to rotate downwards, the top end of the third linkage plate 81 rotates downwards to pull the roller to roll on the slideway 27 through the third pushing plate 82, and the back insert 23 rotates and moves under the limitation of the supporting piece 21, so that the back insert 23 and the supporting piece 21 simultaneously rotate and move, the back insert 23 and the backrest move according to a designed path, stability of the backrest during operation is improved, and the use experience of the sofa is improved.

The working principle of the embodiment of the application is as follows:

the connecting piece 26 pulls the third linkage plate 81 to rotate, and the third linkage plate 81 rotates and pulls the back insert 23 and the supporting piece 21 to rotate simultaneously through the third pushing plate 82, so that the back is rotated and the back is laid down, and meanwhile, the back insert 23 drives the roller to roll on the slideway 27 to support, so that the back is moved according to a designed path, the stability of the back in running is improved, and the use experience of a sofa is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a function sofa mechanical stretching device with zero wall function, includes iron stand (1), swing joint seat frame (11) on iron stand (1), sets up on iron stand (1) and is used for driving drive assembly (4) of seat frame (11) motion, its characterized in that: the seat frame (11) is provided with a force application mechanism (2) for driving the backrest to move, and the force application mechanism (2) comprises:

the back insert (23) is rotatably arranged on the seat frame (11) through the supporting piece (21) and the adjusting piece (22) and is used for installing a backrest;

the connecting piece (26) is rotatably arranged on the iron frame (1);

the force application assembly (3) is arranged on the seat frame (11), is rotationally connected with the connecting piece (26) and is used for driving the backrest to move.

2. The mechanical stretching device for a functional sofa with zero wall leaning function according to claim 1, wherein: the force application assembly (3) comprises:

the force application plate (32) is rotatably arranged on the seat frame (11) through the rotating shaft (14), and is rotatably connected with the connecting piece (26) through the rotating column (351);

the force application piece (33), the force application piece (33) is rotatably arranged on the force application plate (32) through a rotating rod (341) and is rotatably connected with the back insert (23) through a rotating rod (36).

3. The mechanical stretching device for a functional sofa with zero wall leaning function according to claim 2, wherein: be provided with on back of body plug-in components (23) and force application board (32) and carry out spacing subassembly (5) when being in position of sitting and lying position to the sofa, spacing subassembly (5) include:

the first limiting column (51) and the second limiting column (52), the first limiting column (51) is arranged on the back insert (23), the second limiting column (52) is arranged on the force application plate (32) and located between the back insert (23) and the seat frame (11), and the first limiting column (51) and the second limiting column (52) are respectively located on two sides of the supporting piece (21); when the sofa is in a sitting posture, the first limiting column (51) and the second limiting column (52) are respectively propped against the supporting piece (21) and the back insert (23) to be positioned, and when the sofa is in a lying posture, the first limiting column (51) and the second limiting column (52) are respectively propped against the supporting piece (21) and the seat frame (11) to be positioned.

4. A functional sofa mechanical stretcher with zero wall function according to claim 3, characterized in that: the rotating shaft (14) is used for rotating the force application plate (32) with the first linkage part (34) and the second linkage part (35), the first linkage part (34) and the second linkage part (35) are respectively connected with the force application piece (33) and the connecting piece (26) in a rotating mode, and the length of the second linkage part (35) is larger than that of the connecting piece (26).

5. The mechanical stretching device for a functional sofa with zero wall leaning function according to claim 1, wherein: the adjusting part (22) is located one side of the supporting part (21) far away from the wall surface, and the force application assembly (3) comprises:

the first linkage plate (61) is rotatably arranged on the seat frame (11) and is rotatably connected with the connecting piece (26);

and two ends of the first pushing plate (62) are respectively and rotatably connected with the adjusting piece (22) and the first linkage plate (61).

6. The mechanical stretching device for a functional sofa with zero wall leaning function according to claim 1, wherein: the adjusting piece (22) is arranged on the seat frame (11) and provided with an arc-shaped slide way (27), and the back insert (23) is provided with a sliding piece (28) sliding on the slide way (27).

7. The mechanical stretching device for a functional sofa with zero wall function according to claim 6, wherein: the force application assembly (3) comprises:

the second linkage plate (71) is rotatably arranged on the seat frame (11) and is rotatably connected with the connecting piece (26);

the second pushing plate (72), both ends of second pushing plate (72) are connected with back of body plug-in components (23) and second linkage board (71) rotation respectively, second pushing plate (72) and support piece (21) both coincide with the pin joint of back of body plug-in components (23).

8. The mechanical stretching device for a functional sofa with zero wall function according to claim 6, wherein: the force application assembly (3) comprises:

the third linkage plate (81) is rotatably arranged on the seat frame (11) and is rotatably connected with the connecting piece (26);

and two ends of the third pushing plate (82) are respectively and rotatably connected with the sliding piece (28) and the third linkage plate (81).

9. The mechanical stretching device for a functional sofa with zero wall function according to claim 7, wherein: the support piece (21) and the second linkage plate (71) are both provided with positioning columns (9), and when the sofa is in a lying position, the two positioning columns (9) are both propped against the seat frame (11) to be positioned.

10. The mechanical stretching device for a functional sofa with zero wall function according to claim 6, wherein: the sliding piece (28) is a roller rolling on the slideway (27).

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