CN117084523A

CN117084523A - Connection structure for sofa iron frame and backrest

Info

Publication number: CN117084523A
Application number: CN202311363691.7A
Authority: CN
Inventors: 孙勇; 孙明凤
Original assignee: Jiangsu Star Sofa Accessories Co ltd
Current assignee: Jiangsu Star Sofa Accessories Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2023-11-21
Anticipated expiration: 2043-10-20
Also published as: CN117084523B

Abstract

The application belongs to the technical field of sofas, in particular to a connecting structure for an iron sofa frame and a backrest, which comprises an iron sofa frame main body and a backrest bracket arranged on one side of the iron sofa frame main body, wherein a connecting component is arranged between the iron sofa frame main body and the backrest bracket, the connecting component comprises a rotating shaft rod, a clamping groove, a clamping sleeve, a telescopic sleeve A, a spring A, clamping teeth, a movable cavity, a first section rod, a second section rod, a gear A, a connecting plate, a chain A, a gear B and rollers, two groups of rotating blocks which are symmetrically arranged are fixed on the lower surface of the backrest bracket, and the rotating shaft rods are fixed on the two groups of rotating blocks.

Description

Connection structure for sofa iron frame and backrest

Technical Field

The application belongs to the technical field of sofas, and particularly relates to a connecting structure for an iron frame and a backrest of a sofa.

Background

The sofa is one of the seating furniture popular among people, is widely used for meeting rooms, hotels, families and leisure places, the main result of the sofa comprises a steel framework, a back cushion and a decorative skin, wherein the steel framework is the most important part for maintaining the shape of the sofa, the back cushion, the decorative skin and other structures are used for making the sofa more comfortable, improving the use experience of users, at present, an iron frame of the sofa and a backrest are generally connected through a rotating shaft, different lying postures are realized through adjusting the angle of the backrest, the connecting structure is single, the backrest has no supporting effect during the adjusting process of the backrest, and the stability of the sofa is reduced;

in order to solve the above problems, the present application provides a connection structure for a sofa iron frame and a backrest.

Disclosure of Invention

To solve the problems set forth in the background art. The application provides a connecting structure for a sofa iron frame and a backrest, which has the characteristics of being capable of supporting and operating, and improving the stability of the sofa in the process.

In order to achieve the above purpose, the present application provides the following technical solutions: the connecting structure for the sofa iron frame and the backrest comprises a sofa iron frame main body and a backrest bracket arranged on one side of the sofa iron frame main body, wherein a connecting component is arranged between the sofa iron frame main body and the backrest bracket;

the connecting component comprises a rotating shaft rod, a clamping groove, a clamping sleeve, a telescopic sleeve A, a spring A, clamping teeth, a movable cavity, a first joint rod, a second joint rod, a gear A, a connecting plate, a chain A, a gear B and idler wheels, wherein two groups of rotating blocks which are symmetrically arranged are fixed on the lower surface of the backrest bracket, the rotating shaft rod is fixed on the two groups of rotating blocks, two ends of the rotating shaft rod are rotationally connected with the sofa iron frame main body through bearings, one end of the rotating shaft rod penetrates one side of the sofa iron frame main body and extends to the outside of the sofa iron frame main body, the clamping teeth are fixedly connected with the clamping teeth on the outside of the sofa iron frame main body, clamping grooves which are matched with the clamping teeth are formed in the clamping sleeve, a plurality of groups of teeth which are equidistantly arranged are arranged on the surface of the clamping teeth, tooth grooves which are matched with the teeth are formed in the clamping grooves, the movable cavity is arranged in the clamping sleeve, the inner diameter of the movable cavity is larger than the outer diameter of the clamping teeth, four groups of telescopic sleeves A which are annularly and equidistantly arranged are fixed between the clamping sleeve and the sofa iron frame main body, the springs A are arranged in the telescopic sleeves A, two ends of each spring A are respectively and fixedly connected with the sofa iron frame main body and the clamping sleeve, two groups of first section bars which are symmetrically arranged are arranged on the surface of the rotating shaft bar, one end of the first section bar, far away from the rotating shaft bar, is hinged with the second section bar through a hinge shaft, one side of the rotating shaft bar, close to the first section bar, is sleeved with the gear A, two ends of the gear A are rotatably connected with sleeves through bearings B, the surfaces of the sleeves are fixedly provided with connecting plates, the surfaces of the connecting plates are sleeved with the sleeves, the connecting plate with sofa iron stand main part fixed connection, the second festival pole is fixed with through the articulated shaft gear B, gear B with meshing between gear A is connected with chain A, the second festival pole is kept away from first festival pole one end is connected with through the pivot rotation the gyro wheel.

As the connecting structure for the sofa iron frame and the backrest, the connecting assembly further comprises a fixed block, a limiting block, an arc-shaped block, a thimble, a ball body, a locking block, a sliding groove, a spring B, a telescopic rod A, a locking groove and an arc-shaped groove, wherein the fixed block is fixedly arranged in the center of the lower surface of the backrest support, the fixed block is close to one side of the first section bar and fixedly connected with the arc-shaped block, the fixed block is close to one side of the rotating shaft bar, the rotating groove is formed in the surface of the rotating shaft bar, the sliding groove is formed in the surface of the rotating shaft bar, close to one side of the first section bar, the sliding groove is formed in the sliding groove, the locking block is connected with the sliding groove, the sliding groove is fixedly connected with one side of the thimble, close to one side of the surface of the telescopic rod A, the two ends of the spring B are respectively fixedly connected with the locking block and the rotating shaft bar, one side of the first section bar is provided with a rotating groove, the surface of the sliding groove is formed in the surface of the rotating shaft bar is close to one side of the first section bar, the sliding groove is close to one side of the sliding groove is formed in the surface of the thimble, and the sliding groove is close to one side of the surface of the sliding groove is matched with the sliding groove.

As a preferred connecting structure for the sofa iron frame and the backrest, the thickness of the arc-shaped blocks increases in a clockwise direction, and the thickness is unchanged until the angle of 45 degrees.

As the connecting structure for the sofa iron frame and the backrest is preferable, the connecting assembly further comprises a positioning column, balls and a limiting groove, wherein the positioning column is fixed on one side of the surface of the clamping tooth, which is far away from the telescopic sleeve A, and is positioned above the center of the clamping tooth, the balls are arranged at one end of the positioning column, which is far away from the clamping tooth, and the limiting groove matched with the positioning column is formed in the inner side wall of the clamping sleeve.

As a connecting structure for a sofa iron frame and a backrest, preferably, a gear C is fixed at the other end of a hinge shaft, a gear D is rotatably connected to one side of the surface of a second section rod far away from the gear C through a rotating shaft, a chain B is connected between the gear D and the gear C in a meshed manner, a gear E is fixed at the center of the gear D through a fixing column, a side plate is arranged on one side of the second section rod, a side plate is arranged on the side of the third section rod near one end of the gear D, the surface of the side plate is fixed on the surface of the second section rod, a fixing rod is fixed on the side of the surface of the third section rod near the side plate, the fixing rod is fixedly connected with the side plate through a grabbing bearing, a group of fixing rods penetrate through the inner side of the side plate and extend to the outer side of the side plate and are fixedly connected with a gear F outside the side plate, and the gear F is connected with the gear E in a meshed manner.

The application relates to a connecting structure for a sofa iron frame and a backrest, which is preferable and further comprises an auxiliary component arranged on a third section bar, wherein the auxiliary component comprises a moving block, a T-shaped bar, a spring C and a supporting bar, the moving block is arranged in the third section bar, the supporting bar is fixed on one side of the moving block, which is far away from the first section bar, the T-shaped bar is fixed on the upper surface of the moving block, a sliding groove is formed on one side, which is close to the T-shaped bar, of the surface of the third section bar, the T-shaped bar is in sliding connection with the third section bar through the sliding groove, the spring C is wound on the surface of the T-shaped bar, and two ends of the spring C are respectively fixedly connected with the T-shaped bar and the third section bar.

In the connection structure for the sofa iron frame and the backrest, preferably, a moving groove is formed in one side, close to the moving block, of the third section bar, and the moving block and the third section bar are connected in a sliding mode through the moving groove.

As a connecting structure for the sofa iron frame and the backrest, the upper surface of the T-shaped rod is preferably fixed with a first rubber pad.

As the connecting structure for the sofa iron frame and the backrest, the application is preferable, the structure further comprises a protection component arranged on the supporting rod, the protection component comprises an installation cavity, a U-shaped frame, a telescopic sleeve B and a spring D, wherein the installation cavity is arranged on one side, far away from the third section bar, of the surface of the supporting rod, the telescopic sleeve B is arranged in the installation cavity, the outermost sleeve of the telescopic sleeve B is fixedly connected with the supporting rod, the spring D is arranged in the telescopic sleeve B, the U-shaped frame is fixed on one side, close to the installation cavity, of the surface of the third section bar, and the supporting rod is positioned in the U-shaped frame.

As a preferable connection structure for the sofa iron frame and the backrest, a second rubber pad is fixed at one end of the telescopic sleeve B away from the third section bar.

Compared with the prior art, the application has the beneficial effects that:

through having set up coupling assembling, when sofa back is folding in the angle, can support the operation, at this in-process, increase the stability of sofa, at sofa back support level at the same time, have certain supporting function, avoid sofa back support to be in unsettled state, simultaneously through the auxiliary assembly of setting, when the third section pole supports back support, on the one hand can cushion the back support, reduce the impact force that the back support falls, on the other hand can strengthen the stability of third section pole simultaneously, the bearing dynamics of first section pole, the second section pole has been reduced, and added protective component on this mechanism, when back support folding in-process, can survey fast and fix a position back support and wall contact, avoid back support and wall contact, lead to back support overcoat cortex material to receive and scrape the flower and damage.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, serve to explain the application. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present application;

FIG. 2 is a schematic structural view of a first joint lever, a second joint lever, and other connectors according to the present application;

FIG. 3 is a cross-sectional view of the ferrule of the present application;

FIG. 4 is a schematic view of the structure of the third joint lever and the support lever;

FIG. 5 is a cross-sectional view of the construction of the transfer shaft of the present application;

FIG. 6 is an enlarged schematic view of the structure of FIG. 1 according to the present application;

FIG. 7 is a schematic view of the structure of the sofa frame body and backrest support for adjustment in the present application;

FIG. 8 is a schematic view of the ferrule of the present application;

FIG. 9 is an enlarged schematic view of the structure of FIG. 5B according to the present application;

in the figure:

1. a sofa iron frame main body;

2. a backrest bracket;

3. a connection assembly; 31. a rotating shaft lever; 32. a clamping groove; 33. a cutting sleeve; 34. a telescopic sleeve A; 35. a spring A; 36. latch teeth; 37. a movable cavity; 38. positioning columns; 39. a ball; 311. a limit groove; 312. a first section bar; 313. a second section bar; 314. a gear A; 315. a connecting plate; 316. a chain A; 317. a gear B; 318. a fixed block; 319. a limiting block; 320. an arc-shaped block; 321. a thimble; 322. a sphere; 323. a locking piece; 324. a chute; 325. a spring B; 326. a telescopic rod A; 327. a locking groove; 328. an arc-shaped groove; 329. a roller;

41. a gear C; 42. a chain B; 43. a gear D; 44. a gear E; 45. a gear F; 46. a third section bar;

5. an auxiliary component; 51. a moving groove; 52. a moving block; 53. a T-shaped rod; 54. a spring C; 55. a support rod; 56. a first rubber pad;

6. a protective assembly; 61. installing a cavity; 62. a U-shaped frame; 63. a telescopic sleeve B; 64. a spring D; 65. and a second rubber pad.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Example 1

As shown in fig. 1-9:

the connecting structure for the sofa iron frame and the backrest comprises a sofa iron frame main body 1 and a backrest bracket 2 arranged on one side of the sofa iron frame main body 1, wherein a connecting component 3 is arranged between the sofa iron frame main body 1 and the backrest bracket 2;

the connecting component 3 comprises a rotating shaft rod 31, a clamping groove 32, a clamping sleeve 33, a telescopic sleeve A34, a spring A35, clamping teeth 36, a movable cavity 37, a first section rod 312, a second section rod 313, a gear A314, a connecting plate 315, a chain A316, a gear B317 and a roller 329, two groups of rotating blocks which are symmetrically arranged are fixed on the lower surface of the backrest bracket 2, the rotating shaft rod 31 is fixed on the two groups of rotating blocks, two ends of the rotating shaft rod 31 are rotationally connected with the sofa iron frame main body 1 through bearings, one end of the rotating shaft rod 31 penetrates one side of the sofa iron frame main body 1 and extends to the outside of the sofa iron frame main body 1, the clamping teeth 36 are fixedly connected with the outside of the sofa iron frame main body 1, the clamping sleeve 33 is arranged outside of the clamping teeth 36, clamping grooves 32 which are matched with the clamping teeth 36 are arranged in an inside of the clamping sleeve 33, a plurality of groups of teeth which the teeth are equidistantly arranged are arranged on the surface of the clamping teeth 36, the clamping grooves 32 are internally provided with tooth grooves which are matched with the teeth, a movable cavity 37 is arranged at one side of the inside of the clamping sleeve 33, which is close to the clamping teeth 36, the inner diameter of the movable cavity 37 is larger than the outer diameter of the clamping teeth 36, four groups of annular equidistant telescopic sleeves A34 are fixed between the clamping sleeve 33 and the sofa iron frame main body 1, springs A35 are arranged in the telescopic sleeves A34, two ends of each spring A35 are fixedly connected with the sofa iron frame main body 1 and the clamping sleeve 33 respectively, two groups of first section rods 312 which are symmetrically arranged are arranged on the surface of the rotating shaft rod 31, one end of each first section rod 312, which is far away from the rotating shaft rod 31, is hinged with a second section rod 313 through a hinge shaft, a gear A314 is sleeved on one side of the surface of the rotating shaft rod 31, which is close to the first section rod 312, two ends of the gear A314 are rotatably connected with sleeves through bearings B, a connecting plate 315 is fixed on the surfaces of the sleeves, the connecting plate 315 is sleeved with the surface of the sofa iron frame main body 1, the second section rods 313 are fixedly connected with gears B317 through the hinge shafts, a chain A316 is connected between the gear B317 and the gear A314 in a meshed manner, and a roller 329 is rotatably connected to one end of the second link 313, which is far away from the first link 312, through a rotating shaft.

In this embodiment: at present, the iron frame of the sofa is generally connected with the backrest through the rotating shaft, different lying postures are realized by adjusting the angle of the backrest, the connecting structure is single, the backrest is not supported during the adjusting process, and the stability of the sofa is reduced.

According to the sofa, through the connecting structure of the sofa iron frame and the backrest, when the backrest support 2 is required to be folded at an angle, different lying postures are realized, firstly, the clamping sleeve 33 is pressed to move towards the sofa iron frame main body 1, the telescopic sleeve A34 is contracted through the clamping sleeve 33 and the spring A35 is compressed, in the process, until the clamping teeth 36 are moved out of the clamping grooves 32 formed in the clamping sleeve 33 and move into the movable cavity 37, at the moment, the position locking of the rotating shaft rod 31 is released, in the process of rotating the rotating shaft rod 31 clockwise, the chain A316 is driven to rotate, and as the gear A314 is meshed and connected with the gear A316 through the connecting plate 315, the second section rod 313 is driven to reversely overturn through the hinge shaft while the first section rod 312 is driven, at the moment, the second section rod 313 is contacted with the ground through the roller 329, the second section rod 313 is continuously extended outwards, so that the support operation can be carried out, and in the process, the stability of the sofa is increased.

Further, the method comprises the steps of;

in an alternative embodiment, the connecting component 3 further comprises a fixed block 318, a limiting block 319, an arc-shaped block 320, a thimble 321, a ball 322, a locking block 323, a chute 324, a spring B325, a telescopic rod A326, a locking groove 327 and an arc-shaped groove 328, the fixed block 318 is fixed at the center of the lower surface of the backrest support 2, the fixed block 318 is close to one side of the first section bar 312 and is fixedly provided with the arc-shaped block 320, the fixed block 318 presents a rotating groove close to one side of the rotating shaft bar 31, the rotating shaft bar 31 and the fixed block 318 are rotationally connected through the rotating groove, the surface of the rotating shaft bar 31 is close to one side of the first section bar 312 and is provided with the chute 324, the sliding connection of the chute 324 is provided with the locking block 323, one side of the locking block 323 is fixedly provided with the telescopic rod A326, the other end of the telescopic rod A326 is fixedly connected with the rotating shaft bar 31, the surface of the telescopic rod A326 is sleeved with the spring B325, two ends of the spring B325 are fixedly connected with the locking block 323 and the rotating shaft bar 31 respectively, one side of the first section bar 312 is close to one side of the locking block 323, one side of the locking groove 327 is provided with the locking groove 327 adapted to one side of the rotating shaft bar 312, one side of the first section bar 312 is close to one side of the locking groove 319 is provided with the locking groove 319, one side of the rotating groove 321 is close to one side of the locking groove 321 is adapted to one side of the locking groove 321, and is close to one side of the surface of the top 321 is close to one side of the top cover 321 is adapted to one side of the other is, and is connected with one side is adapted to one side is.

The arcuate blocks 320 increase in thickness in a clockwise direction in sequence and begin to be constant until an angular thickness of 45 deg..

In this embodiment: the rotating shaft rod 31 rotates and drives the locking block 323 and the ejector pin 321 to synchronously rotate, so that the ball 322 on the ejector pin 321 moves in a circular track on the surface of the arc block 320, the thickness of the arc block 320 is continuously increased, the ejector pin 321 is driven to move away from the fixed block 318, in the moving process of the ejector pin 321, the locking block 323 is driven to slide in the sliding groove 324 and the locking groove 327, the spring B325 is driven to stretch along with the moving of the locking block 323, meanwhile, the telescopic rod A326 is driven to stretch, the stability of the locking block 323 can be improved through the telescopic rod A326, when the locking block 323 moves in the arc groove 328, the locking of the first section rod 312 is released, and then the rotating shaft rod 31 idles in the first section rod 312, and at the moment, the first section rod 312, the second section rod 313 and the third section rod 46 cannot rotate in an angle (the moving distance of the locking block 323 in the ejector pin 321 is relatively 45 degrees with the rotating shaft rod 31).

Further, the method comprises the steps of;

in an alternative embodiment, the connecting assembly 3 further includes a positioning column 38, a ball 39 and a limiting groove 311, the positioning column 38 is fixed on one side of the surface of the latch 36 away from the telescopic sleeve a34, the positioning column 38 is located above the center of the latch 36, the ball 39 is disposed on one end of the positioning column 38 away from the latch 36, and the limiting groove 311 adapted to the positioning column 38 is formed in the inner side wall of the clamp sleeve 33.

In this embodiment: the locating column 38 is located the inside of spacing groove 311, carries out 90 spacing to pivot pole 31 through spacing groove 311, can reduce the frictional force between locating column 38 and the cutting ferrule 33 through the ball 39 on the locating column 38, makes locating column 38 in spacing groove 311 removal in-process smooth nature better.

Further, the method comprises the steps of;

in an alternative embodiment, the other end of the hinge shaft is fixed with a gear C41, one side of the surface of the second section bar 313 away from the gear C41 is rotatably connected with a gear D43 through a rotating shaft, a chain B42 is engaged and connected between the gear D43 and the gear C41, a gear E44 is fixed at the center of the gear D43 through a fixing column, a third section bar 46 is arranged on one side of the second section bar 313, two sides of one end of the third section bar 46 close to the gear D43 are provided with side plates, the side plates are fixed on the surface of the second section bar 313, a fixing bar is fixed on one side of the surface of the third section bar 46 close to the side plates, the fixing bars and the side plates are fixedly connected through a grabbing bearing, one group of fixing bars penetrate through the inner side of the side plates and extend to the outer side of the side plates and are fixedly connected with a gear F45 outside the side plates, and the gear F45 is engaged and connected with the gear E44.

In this embodiment: in the process, the gear B317 rotates, the gear C41 is driven to rotate through the hinge shaft, the gear C41 and the gear D43 are in meshed connection through the chain B42, the gear D43 is driven to rotate, the gear E44 and the gear F45 are in meshed connection, the gear F45 is driven to rotate, the third section rod 46 is driven to rotate, and the third section rod 46 is driven to perform angle overturning, so that when the backrest support 2 is required to be folded continuously until the backrest support 2 is flattened, the third section rod 46 has a certain supporting function on the backrest support 2, the backrest support 2 is prevented from being in a suspended state, and the stability of the backrest support 2 is further improved.

Further, the method comprises the steps of;

in an alternative embodiment, the auxiliary assembly 5 is further arranged on the third section rod 46, the auxiliary assembly 5 comprises a moving block 52, a T-shaped rod 53, a spring C54 and a supporting rod 55, the moving block 52 is arranged in the third section rod 46, the supporting rod 55 is fixed on one side, far away from the first section rod 312, of the moving block 52, the T-shaped rod 53 is fixed on the upper surface of the moving block 52, a sliding groove is formed on one side, close to the T-shaped rod 53, of the surface of the third section rod 46, the T-shaped rod 53 and the third section rod 46 are in sliding connection through the sliding groove, a spring C54 is arranged on the surface of the T-shaped rod 53 in a winding mode, and two ends of the spring C54 are fixedly connected with the T-shaped rod 53 and the third section rod 46 respectively.

A moving groove 51 is formed in the third section bar 46 at a side close to the moving block 52, and the moving block 52 and the third section bar 46 are connected in a sliding manner through the moving groove 51.

The upper surface of the T-shaped rod 53 is fixed with a first rubber pad 56.

In this embodiment: when the backrest support 2 is put flat, when the backrest support 2 is contacted with the first rubber pad 56, the leather material of the backrest support 2 is sleeved with the first rubber pad 56, damage caused by scraping caused by extrusion is avoided, the T-shaped rod 53 is driven to move downwards along with continuous downward movement of the backrest support 2, the spring C54 is driven to compress through the T-shaped rod 53, the backrest support 2 can be quickly put flat through the spring C54, the falling impact force of the backrest support 2 is reduced, on the other hand, when the backrest support 2 is released from extrusion of the T-shaped rod 53, the T-shaped rod 53 is driven to reset through the spring C54, the T-shaped rod 53 is driven to move downwards along with the downward movement of the T-shaped rod 53, the moving block 52 is driven to slide in the moving groove 51 formed by the third section rod 46, and the moving block 52 and the inner side wall of the third section rod 46 are attached to each other, so that the moving block 52 can be better limited, the moving block 52 is more stable, the supporting rod 55 is driven to move downwards until the supporting rod 55 is contacted with the ground, and the stability of the third section rod 46 and the third section rod 46 can bear the third section rod 313 and the third section rod 46 can be strengthened through the supporting rod 55.

Further, the method comprises the steps of;

in an alternative embodiment, the protection component 6 is further installed on the supporting rod 55, the protection component 6 comprises an installation cavity 61, a U-shaped frame 62, a telescopic sleeve B63 and a spring D64, wherein the installation cavity 61 is formed in one side, far away from the third section rod 46, of the surface of the group of supporting rods 55, the telescopic sleeve B63 is arranged in the installation cavity 61, the outermost group of sleeves of the telescopic sleeve B63 is fixedly connected with the supporting rod 55, the spring D64 is arranged in the telescopic sleeve B63, the U-shaped frame 62 is fixed on one side, close to the installation cavity 61, of the surface of the third section rod 46, and the supporting rod 55 is positioned in the U-shaped frame 62.

A second rubber pad 65 is fixed to the end of the telescopic sleeve B63 remote from the third joint lever 46.

In this embodiment: when the supporting rod 55 moves down in the process until the mounting cavity 61 is located below the U-shaped frame 62, the position locking of the telescopic sleeve B63 is released, the spring D64 rebounds and drives the telescopic sleeve B63 to extend, whether the spring D64 is in contact with the wall surface or not is observed, so that whether the backrest support 2 is in contact with the wall surface or not can be judged rapidly while the backrest support 2 is flat, damage to the leather material of the outer sleeve of the backrest support 2 due to scraping is effectively avoided (the extending length of the telescopic sleeve B63 is larger than the flattening length of the backrest support 2), whether the backrest support 2 is in contact with the wall surface or not is conveniently judged, when the telescopic sleeve B63 is in contact with the wall surface, folding and flattening operation of the backrest support 2 is stopped at the moment, when the telescopic sleeve B63 is in contact with the wall surface, the telescopic sleeve B63 is in contact with the wall surface firstly, the telescopic sleeve B63 is in contact with the wall surface through the second rubber pad 65, and damage to the wall surface due to the impact force of the telescopic sleeve B63 extending out is avoided.

It should be noted that: the telescopic sleeve B63 and the telescopic sleeve A34 are formed by sleeving and combining a plurality of sections of sleeves, and the diameters of each section of sleeve are gradually reduced along with the length, so that the sleeves are prevented from falling off.

The working principle and the using flow of the application are as follows: when the connecting structure for the sofa iron frame and the backrest is used, when the backrest bracket 2 is required to be folded at an angle, different lying postures are realized, firstly, the clamping sleeve 33 is pressed to move towards the sofa iron frame main body 1, the telescopic sleeve A34 is contracted through the clamping sleeve 33, meanwhile, the spring A35 is compressed, in the process, the clamping teeth 36 are moved out of the clamping grooves 32 formed by the clamping sleeve 33 and move into the movable cavity 37, at the moment, the position locking of the rotating shaft rod 31 is released, meanwhile, the positioning column 38 is positioned in the limiting groove 311, the rotating shaft rod 31 is limited by 90 degrees through the limiting groove 311, the friction force between the positioning column 38 and the clamping sleeve 33 can be reduced through the balls 39 on the positioning column 38, so that the smoothness of the positioning column 38 is better in the moving process of the limiting groove 311, when the rotating shaft rod 31 rotates along a pointer, the chain A316 is driven to rotate along the pointer angle, and further drive the chain A316 to rotate, because the gear A314 is sleeved on the rotating shaft rod 31 through the connecting plate 315, and the gear A314 and the gear B317 are in meshed connection through the chain A316, and further drive the second node 313 to reversely overturn through the hinge shaft while the first node 312 rotates, at the moment, the second node 313 is contacted with the ground through the roller 329, and continuously extends outwards, so that the support operation can be performed, in the process, the stability of the sofa is improved, in the process, the gear B317 rotates while the gear C41 is driven to rotate through the hinge shaft, the gear C41 and the gear D43 are driven to rotate through the meshed connection of the chain B42, the gear D43 is driven to rotate through the rotation of the gear D43, the gear E44 is driven to rotate, and the gear E44 and the gear F45 are driven to rotate through the meshed connection, the third section bar 46 is driven to turn over in angle through the rotation of the gear F45, the rotating shaft rod 31 rotates and drives the locking piece 323 and the thimble 321 to synchronously rotate, the sphere 322 on the thimble 321 moves along the circular track on the surface of the arc block 320, the thickness of the arc block 320 is continuously increased, the thimble 321 is driven to move towards the direction away from the fixed block 318, the locking piece 323 is driven to slide in the sliding groove 324 and the locking groove 327 in the moving process of the thimble 321, the spring B325 is driven to stretch along with the movement of the locking piece 323, the telescopic rod A326 is driven to stretch, the stability of the locking piece 323 can be increased through the telescopic rod A326, when the locking piece 323 moves in the arc groove 328, the locking of the first section bar 312 is released, the rotating shaft rod 31 is driven to idle in the first section bar 312, at this time, the first node rod 312, the second node rod 313 and the third node rod 46 cannot rotate in angle (the locking piece 323 rotates 45 degrees relative to the rotating shaft rod 31 when the thimble 321 moves, when the backrest support 2 needs to be folded in angle until the sofa backrest support 2 is unfolded, the third node rod 46 can have a certain supporting function on the sofa backrest support 2, the sofa backrest support 2 is prevented from being in a suspended state, the stability of the backrest support 2 is further improved, when the backrest support 2 is unfolded, the first rubber pad 56 is contacted with the first rubber pad 56, the leather material sleeved on the backrest support 2 can be protected, the situation of damage caused by scratch due to extrusion is avoided, the T-shaped rod 53 is driven to move downwards along with the continuous movement of the backrest support 2, the spring C54 is driven to compress through the T-shaped rod 53, the backrest support 2 can be buffered in the quick unfolding process through the spring C54, the impact force of the backrest support 2 is reduced, on the other hand, when the backrest bracket 2 releases the extrusion of the T-shaped rod 53, the T-shaped rod 53 can be driven to reset by the spring C54, the moving block 52 is driven to move downwards along with the downward movement of the T-shaped rod 53, the moving block 52 slides in the moving groove 51 formed by the third section rod 46, the moving block 52 and the inner side wall of the third section rod 46 are attached, so that the moving block 52 can be better limited, the moving block 52 is more stable, the supporting rod 55 is driven to move downwards through the downward movement of the moving block 52 until the supporting rod 55 contacts with the ground, the stability of the third section rod 46 can be enhanced through the supporting rod 55, the bearing force of the first section rod 312, the second section rod 313 and the third section rod 46 is reduced, when the supporting rod 55 moves downwards until the installation cavity 61 is positioned below the U-shaped frame 62, the position locking of telescopic sleeve B63 is released at this moment, spring D64 rebounds, and drive telescopic sleeve B63 and stretch out, observe whether spring D64 is contradicted with the wall, thereby whether contact with the wall when can judge back support 2 put flat fast, effectively avoid back support 2 and wall contact, lead to back support 2 overcoat cortex material to receive to scrape the flower and damage (telescopic sleeve B63 stretches out length and is greater than back support 2 and put flat length), thereby be convenient for judge back support 2 and put flat and can contact with the wall simultaneously, when telescopic sleeve B63 and wall contact, stop the folding operation of putting flat to back support 2 at this moment, when telescopic sleeve B63 and wall contact, contact with the wall earlier through second rubber pad 65, thereby avoid telescopic sleeve B63 to stretch out impact force and cause the damage to the wall.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present application has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a connection structure for sofa iron stand and back, is in including sofa iron stand main part (1) and setting are in back support (2) of sofa iron stand main part (1) one side, its characterized in that: a connecting component (3) is arranged between the sofa iron frame main body (1) and the backrest bracket (2);

the connecting component (3) comprises a rotating shaft rod (31), clamping grooves (32), a clamping sleeve (33), a telescopic sleeve A (34), a spring A (35), clamping teeth (36), a movable cavity (37), a first section rod (312), a second section rod (313), a gear A (314), a connecting plate (315), a chain A (316), a gear B (317) and rollers (329), two groups of rotating blocks which are symmetrically arranged are fixed on the lower surface of the backrest bracket (2), the rotating shaft rod (31) is fixed on the two groups of rotating blocks, two ends of the rotating shaft rod (31) are rotatably connected with the sofa iron frame body (1) through bearings, one end of the rotating shaft rod (31) penetrates through one side of the sofa iron frame body (1) and extends to the outside of the sofa iron frame body (1), the clamping teeth (36) are fixedly connected outside the sofa iron frame body (1), the clamping teeth (33) are arranged outside, clamping grooves (36) which are matched with the clamping teeth are arranged inside the clamping sleeve (31), the clamping grooves (36) are arranged on one side of the clamping sleeve (31) at equal distance, the clamping grooves (32) are arranged inside the clamping sleeve body (36), the inner diameter of the movable cavity (37) is larger than the outer diameter of the clamping teeth (36), four groups of telescopic sleeves A (34) which are annularly and equidistantly arranged are fixed between the clamping sleeve (33) and the sofa iron frame main body (1), the springs A (35) are arranged in the telescopic sleeves A (34), two ends of each spring A (35) are fixedly connected with the sofa iron frame main body (1) and the clamping sleeve (33) respectively, two groups of first section bars (312) which are symmetrically arranged are arranged on the surface of the rotating shaft rod (31), one end of each first section bar (312) far away from the rotating shaft rod (31) is hinged with a second section bar (313) through a hinge shaft, one side of the surface of each rotating shaft rod (31) is sleeved with a gear A (314), two ends of each gear A (314) are rotatably connected with a sleeve through a bearing B, the surfaces of the sleeves are fixedly connected with a connecting plate (315), the surfaces of the connecting plate (315) are sleeved with the sleeves, one end of each connecting plate is fixedly connected with the gear A (315) through a hinge shaft (313), one end of each connecting plate (315) is fixedly connected with the gear A (315) through a hinge shaft (313), one end, far away from the first section bar (312), of the second section bar (313) is rotationally connected with the roller (329) through a rotating shaft.

2. The connection structure for sofa iron frame and backrest according to claim 1, characterized in that: the connecting component (3) further comprises a fixed block (318), a limiting block (319), an arc-shaped block (320), a thimble (321), a ball body (322), a locking block (323), a sliding groove (324), a spring B (325), a telescopic rod A (326), a locking groove (327) and an arc-shaped groove (328), wherein the fixed block (318) is fixed at the center of the lower surface of the backrest bracket (2), the arc-shaped block (320) is fixed at one side of the fixed block (318) close to the first section rod (312), the fixed block (318) is provided with a rotating groove at one side close to the rotating shaft rod (31), the rotating shaft rod (31) and the fixed block (318) are connected in a rotating way through the rotating groove, the surface of the rotating shaft rod (31) is close to one side of the first section rod (312), the sliding groove (324) is connected with the locking block (323) in a sliding way, the telescopic rod A (326) is fixed at one side of the fixed block (318), the other end of the telescopic rod A (326) is connected with the rotating shaft (325) through the rotating shaft (31) and the surface of the spring B (325) is connected with the rotating shaft (31), the novel anti-theft lock is characterized in that the lock groove (327) which is matched with the lock block (323) is formed in one side, which is close to the lock block (323), of the first joint rod (312), the arc groove (328) is formed in one side, which is close to the lock groove (327), of the first joint rod (312), the thimble (321) is fixed on one side, which is close to the fixing block (318), of the lock block (323), the thimble (321) is far away from one end of the lock block (323), the ball (322) is matched with the surface of the arc block (320), the rotating shaft rod (31) is fixed on one side, which is close to the thimble (321), of the first joint rod (312), a through hole which is matched with the thimble (321) is formed in one side, is close to the surface of the stopper (319), and the thimble (321) and the stopper (319) are connected in a sliding mode through the through hole.

3. The connection structure for sofa iron frame and backrest according to claim 2, characterized in that: the thickness of the arc-shaped blocks (320) is sequentially increased in the clockwise direction, and the thickness is unchanged until the angle of 45 degrees.

4. A connection structure for sofa iron frame and backrest according to claim 3, characterized in that: coupling assembling (3) still include reference column (38), ball (39) and spacing groove (311), latch (36) surface keep away from telescopic sleeve A (34) one side is fixed with reference column (38), reference column (38) are located latch (36) center department top, reference column (38) are kept away from latch (36) one end is provided with ball (39), cutting ferrule (33) inside wall seted up with spacing groove (311) of reference column (38) looks adaptation.

5. The connection structure for sofa iron frame and backrest according to claim 4, characterized in that: the other end of articulated shaft is fixed with gear C (41), second festival pole (313) surface is kept away from gear C (41) one side is connected with gear D (43) through the pivot rotation, gear D (43) with meshing between gear C (41) is connected with chain B (42), gear D (43) center department is fixed with gear E (44) through the fixed column, second festival pole (313) one side is provided with third festival pole (46), third festival pole (46) are close to gear D (43) one end both sides are provided with the curb plate, and the curb plate is fixed in the surface of second festival pole (313), third festival pole (46) surface is close to curb plate one side and is fixed with the dead lever, and dead lever and curb plate pass through grabbing bearing fixed connection, and wherein a set of dead lever runs through the curb plate inboard to the curb plate outside, and with the outside gear F (45) fixed connection of curb plate, gear F (45) with gear E (44) meshing connection.

6. The connection structure for sofa iron frame and backrest according to claim 5, characterized in that: the auxiliary assembly (5) is installed on the third section bar (46), the auxiliary assembly (5) comprises a moving block (52), a T-shaped bar (53), a spring C (54) and a supporting rod (55), the moving block (52) is arranged inside the third section bar (46), the moving block (52) is away from one side of the first section bar (312) and is fixedly provided with the supporting rod (55), the T-shaped bar (53) is fixedly arranged on the upper surface of the moving block (52), a sliding groove is formed in one side, close to the surface of the T-shaped bar (53), of the third section bar (46), the T-shaped bar (53) is in sliding connection with the third section bar (46) through the sliding groove, the surface of the T-shaped bar (53) is wound with the spring C (54), and two ends of the spring C (54) are respectively fixedly connected with the T-shaped bar (53) and the third section bar (46).

7. The connection structure for sofa iron frame and backrest according to claim 6, characterized in that: a moving groove (51) is formed in the third section rod (46) and close to one side of the moving block (52), and the moving block (52) and the third section rod (46) are connected in a sliding mode through the moving groove (51).

8. The connection structure for sofa iron frame and backrest according to claim 7, characterized in that: the upper surface of the T-shaped rod (53) is fixedly provided with a first rubber pad (56).

9. The connection structure for sofa iron frame and backrest according to claim 8, characterized in that: the protection assembly (6) is installed on the support rod (55), the protection assembly (6) comprises an installation cavity (61), a U-shaped frame (62), a telescopic sleeve B (63) and a spring D (64), wherein the installation cavity (61) is formed in a mode that the surface of the support rod (55) is far away from one side of a third section rod (46), the telescopic sleeve B (63) is arranged in the installation cavity (61), the outermost sleeve of the telescopic sleeve B (63) is fixedly connected with the support rod (55), the spring D (64) is arranged in the telescopic sleeve B (63), the U-shaped frame (62) is fixed on one side of the installation cavity (61) in a mode that the surface of the third section rod (46) is close to the surface of the third section rod (46), and the support rod (55) is located in the U-shaped frame (62).

10. The connection structure for sofa iron frame and backrest according to claim 9, characterized in that: and a second rubber pad (65) is fixed at one end of the telescopic sleeve B (63) far away from the third joint rod (46).