CN221179934U

CN221179934U - Sofa frame

Info

Publication number: CN221179934U
Application number: CN202323150598.6U
Authority: CN
Inventors: 段攀峰
Original assignee: Guangdong Yinku Furniture Co ltd
Current assignee: Guangdong Yinku Furniture Co ltd
Priority date: 2023-11-21
Filing date: 2023-11-21
Publication date: 2024-06-21
Anticipated expiration: 2033-11-21

Abstract

The utility model relates to the technical field of furniture, in particular to a sofa frame, which comprises a main body frame; a driving mechanism mounted on the main body frame; the linkage type hinge mechanism is movably arranged on the main body frame and is connected with the output end of the driving mechanism; the leg support bracket is arranged at one end of the linkage type hinge mechanism, which is close to the front of the main body frame; a backrest bracket detachably mounted at one end of the linked hinge mechanism near the rear of the main body frame; the driving mechanism can drive the linkage type hinge mechanism to extend or retract so as to adjust the lifting or retracting of the leg support bracket and adjust the angle between the backrest bracket and the main body frame. Through setting up the main part frame of frame-type, saved traditional wood frame structure of beating, overall structure is simpler, low in manufacturing cost. The back support is designed to be detachable relative to the main body frame, and can be detached during packaging, so that the packaging volume of products is greatly reduced, the cabinet loading amount is improved, and the transportation cost is reduced.

Description

Sofa frame

Technical Field

The utility model relates to the technical field of furniture, in particular to a sofa frame.

Background

In daily life of people, the sofa has become very common furniture, and compared with a wooden seat, the sofa can provide more comfort for people. Along with the continuous improvement of the living standard of people, the requirements of people on furniture are also higher and higher, and common sofa with single function is gradually abandoned by people.

The functional sofa is more and more on the market, and most of the functional sofa has the function of adjusting the angle of the backrest and simultaneously has the function of contracting or expanding the leg brackets. The existing functional sofa generally comprises a base, an electric control mechanism, a wood frame structure, a sponge, a skin and the like, and has the defects of complex overall structure and complex production procedures; the packaging volume of the product is also larger, so that the cabinet loading amount is smaller and the transportation cost is higher.

Disclosure of utility model

The utility model aims to provide a sofa frame, and aims to solve the technical problems of complex overall structure, large packaging volume and high transportation cost in the prior art.

In order to achieve the above object, the present utility model provides a sofa frame, comprising:

A main body frame;

a driving mechanism mounted on the main body frame;

The linkage type hinge mechanism is movably arranged on the main body frame and is connected with the output end of the driving mechanism;

the leg support bracket is arranged at one end of the linkage type hinge mechanism, which is close to the front of the main body frame;

A backrest bracket detachably mounted at one end of the linked hinge mechanism near the rear of the main body frame;

The driving mechanism can drive the linkage type hinge mechanism to extend or retract so as to adjust the lifting or retracting of the leg support bracket and adjust the angle between the backrest bracket and the main body frame.

Preferably, the main body frame comprises a left side frame, a right side frame, a first cross bar, a second cross bar and a third cross bar, wherein the left side frame and the right side frame are opposite and are arranged at intervals; two ends of the first cross rod are respectively connected with the left side frame and the right side frame and are positioned near the front of the leg support bracket, two ends of the second cross rod are respectively connected with the left side frame and the right side frame and are positioned near the rear of the backrest bracket, and two ends of the third cross rod are respectively connected with the left side frame and the right side frame and are positioned below the second cross rod; the driving mechanism is mounted on the third cross bar.

Preferably, two ends of the first cross bar are detachably connected with the left side frame and the right side frame respectively, two ends of the second cross bar are detachably connected with the left side frame and the right side frame respectively, and two ends of the third cross bar are detachably connected with the left side frame and the right side frame respectively.

Preferably, the linkage hinge mechanism comprises a connecting cross rod, a left hinge assembly and a right hinge assembly, the left hinge assembly is movably mounted on the left side frame, the right hinge assembly is movably mounted on the right side frame, the connecting cross rod is connected with the output end of the driving mechanism, two ends of the connecting cross rod are respectively connected with the left hinge assembly and the right hinge assembly, and the left hinge assembly and the right hinge assembly are identical in structure.

Preferably, the left hinge assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a long rod and a left connecting plate; one end of the first connecting rod and one end of the second connecting rod are rotatably connected with the left side frame, the other end of the first connecting rod is rotatably connected with one end of the third connecting rod, the other end of the second connecting rod is rotatably connected with one end of the fourth connecting rod, the third connecting rod is rotatably connected with the fourth connecting rod, and the other end of the third connecting rod and the other end of the fourth connecting rod are connected with the leg support bracket; one end of the long rod is rotatably connected with the second connecting rod, the other end of the long rod is rotatably connected with the left connecting plate, and the left connecting plate is rotatably connected with the left side frame and the backrest bracket; one end of the connecting cross rod is connected with the second connecting rod.

Preferably, the left hinge assembly further comprises a fixing plate, one end of the first connecting rod and one end of the second connecting rod are rotatably connected with the fixing plate, and the fixing plate is fixedly connected with the left side frame.

Preferably, a left mounting plate is arranged on the left side of the backrest bracket, a slot is formed in the left mounting plate, and the left connecting plate is inserted into the slot.

Preferably, the driving mechanism comprises a driving motor, a screw and a movable housing, wherein the driving motor is connected with one end of the screw and used for driving the screw to rotate, the movable housing is sleeved on the screw and is in threaded connection with the screw, the driving motor is installed on the third cross rod, and one end, far away from the driving motor, of the movable housing is connected with the linkage type hinge mechanism.

Preferably, the device further comprises a plurality of nail-free spring buckles and a plurality of snake-shaped springs, wherein the first cross rod and the second cross rod are provided with a plurality of nail-free spring buckles, one end of each snake-shaped spring is arranged on the nail-free spring buckle on the first cross rod, and the other end of each snake-shaped spring is arranged on the corresponding nail-free spring buckle on the second cross rod.

Preferably, the nail-free spring fastener has elastic deformation capability, the nail-free spring fastener comprises a main body fastener, a first elastic part extending outwards is arranged at the upper end of the main body fastener, and a second elastic part extending outwards is arranged at the lower end of the main body fastener; in a natural state, the first elastic part is positioned at one side of the second elastic part, the first elastic part, the second elastic part and the main body are buckled to form a clamping cavity, and the clamping cavity is used for clamping the first cross rod or the second cross rod; the first elastic part and the second elastic part are respectively provided with a clamping hook cavity, and one end of the snake-shaped spring is hooked in the clamping hook cavity.

Preferably, the novel handrail comprises a handrail substrate and a fixing piece, wherein a first mounting hole is formed in the handrail substrate, second mounting holes corresponding to the first mounting holes are formed in the left side frame and the right side frame, and the fixing piece penetrates through the first mounting holes to be embedded into the second mounting holes so that the handrail substrate is mounted on the left side frame and the right side frame.

The sofa frame has at least the following beneficial effects: through setting up the main part frame of frame-type, directly regard main part frame as sofa main part and seat frame, saved traditional wood frame structure, consequently overall structure is simpler, and manufacturing process is simpler, and manufacturing cost is lower, and the product steadiness is good, and the weight of whole product is lighter. The design can be dismantled to the back support relative main body frame, consequently can lift down the back support when packing to can prevent to install in main body frame bottom with the back support, make full use of main body frame's inner space, the packing volume of product reduces greatly, thereby has improved the dress cabinet volume, has reduced cost of transportation.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of a sofa frame of the present utility model;

FIG. 2 is a schematic view of another state of the sofa frame of the present utility model;

FIG. 3 is a schematic view of the structure of the main frame of the present utility model;

FIG. 4 is a schematic view of the drive mechanism and the linked hinge mechanism of the present utility model;

FIG. 5 is a schematic view of the left hinge assembly of the present utility model;

FIG. 6 is a schematic view of the structure of the back rest bracket of the present utility model;

FIG. 7 is a schematic view of the structure of the left mounting plate of the present utility model;

FIG. 8 is a schematic view of the structure of the no-nail snap fastener of the present utility model;

FIG. 9 is a schematic view of another angle of the no-nail snap of the present utility model;

FIG. 10 is a schematic view of the structure of the handrail substrate of the present utility model;

FIG. 11 is a schematic view of another embodiment of a body frame of the present utility model;

Fig. 12 is a schematic view of an exploded structure of another embodiment of the body frame of the present utility model.

In the accompanying drawings: 1-main body frame, 11-left side frame, 12-right side frame, 13-first cross bar, 14-second cross bar, 15-third cross bar, 16-second mounting hole, 2-driving mechanism, 21-driving motor, 22-screw, 23-moving housing, 3-linked hinge mechanism, 31-connecting cross bar, 32-left hinge assembly, 321-first link, 322-second link, 323-third link, 324-fourth link, 325-long bar, 326-left connecting plate, 327-fixed plate, 33-right hinge assembly, 4-leg rest bracket, 5-backrest bracket, 51-left mounting plate, 511-slot, 6-nail-free snap fastener, 61-main body fastener, 62-first elastic portion, 63-second elastic portion, 64-clamping cavity, 65-hook cavity, 7-serpentine spring, 8-base plate, 81-first mounting hole.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 and 2, a sofa frame includes a main body frame 1, a driving mechanism 2, a linkage hinge mechanism 3, a leg rest bracket 4 and a backrest bracket 5.

The main body frame 1 is a main body part of a sofa frame, the shape of the main body frame is a frame type structure, and in a finished sofa, the main body frame 1 also serves as a seat frame for a user to sit. The main body frame 1 is made of metal materials so as to ensure the stability of the sofa frame structure. A driving mechanism 2 is mounted on the main body frame 1, and the driving mechanism 2 is used for driving the linked hinge mechanism 3 to extend or retract. The linked hinge mechanism 3 is movably mounted on the main body frame 1 and connected to an output end of the driving mechanism 2. The leg support bracket 4 is arranged at one end of the linkage hinge mechanism 3 near the front of the main body frame 1, and the leg support bracket 4 is used as a main body bracket of a leg support in a finished sofa and supports the legs of a user in use. The backrest bracket 5 is detachably arranged at one end of the linkage hinge mechanism 3 close to the rear of the main body frame 1, and the backrest bracket 5 is used as a main body bracket of a backrest in a finished sofa, so that the back of a user can lean on and support the upper half of the user during use. The driving mechanism 2 can drive the linked hinge mechanism 3 to extend or retract. When the driving mechanism 2 drives the linkage type hinge mechanism 3 to extend, the linkage type hinge mechanism 3 can drive the leg support bracket 4 to lift, and simultaneously, the angle between the backrest bracket 5 and the main body frame 1 is enlarged, so that the leg support bracket 4 can support the legs of a user, and meanwhile, the backrest bracket 5 can support the user lying down. By setting the driving mechanism 2 or setting the linkage hinge mechanism 3, the effect of a sofa with zero gravity can be achieved.

The existing functional sofa is complex in structure, complex in production process, large in packaging volume, small in cabinet loading amount, and high in production cost and transportation cost. And this technical scheme through setting up the main part frame 1 of frame-type, directly regard main part frame 1 as sofa main part and seat frame, has saved traditional wood frame structure of beating, therefore overall structure is simpler, and manufacturing process is simpler, and manufacturing cost is lower, and the product steadiness is good, and the weight of whole product is lighter. The design can be dismantled to the relative main body frame 1 of back support 5, consequently can lift back support 5 off during the packing to can prevent to install back support 5 in main body frame 1 bottom, make full use of main body frame 1's inner space, the packing volume of product reduces greatly, thereby has improved the dress cabinet volume, has reduced cost of transportation.

Referring to fig. 3, further, the main body frame 1 includes a left side frame 11, a right side frame 12, a first rail 13, a second rail 14, and a third rail 15. The left side frame 11 and the right side frame 12 have the same structure and are symmetrically arranged; the left side frame 11 and the right side frame 12 are quadrilateral frame structures formed by four rods; the left side frame 11 and the right side frame 12 are opposite and spaced apart. One end of the first cross bar 13 is connected to the upper front corner of the left side frame 11, and the other end of the first cross bar 13 is connected to the upper front corner of the right side frame 12. One end of the second cross bar 14 is connected to the upper rear corner of the left side frame 11, and the other end of the second cross bar 14 is connected to the upper rear corner of the right side frame 12. The first cross bar 13 and the second cross bar 14 are spaced apart and parallel to each other. The leg rest bracket 4 is near the front of the left side frame 11 and the right side frame 12, and the backrest bracket 5 is near the rear of the left side frame 11 and the right side frame 12. Both ends of the third cross bar 15 are respectively connected with the left side frame 11 and the right side frame 12 and are positioned below the second cross bar 14. The drive mechanism 2 is mounted on a third cross bar 15 and the ganged hinge mechanism 3 is located between the left side frame 11 and the right side frame 12.

The structure of the main body frame 1 is arranged in this way, the integral structure of the sofa frame can be simplified, and the structural stability is good. The space utilization of the inside of the main body frame 1 is high, the packaging volume of products is reduced, the cabinet loading amount is increased, and the transportation cost is further reduced.

Referring to fig. 11 to 12, in another embodiment, the main frame 1 is a detachable structure. Specifically, the left side frame 11 and the right side frame 12 are of an integral frame structure, one end of the first cross bar 13 is detachably connected to the corner in front of the upper end of the left side frame 11, and the other end of the first cross bar 13 is detachably connected to the corner in front of the upper end of the right side frame 12. One end of the second cross bar 14 is detachably connected to the upper end rear corner of the left side frame 11, and the other end of the second cross bar 14 is detachably connected to the upper end rear corner of the right side frame 12. Both ends of the third cross bar 15 are detachably connected with the left side frame 11 and the right side frame 12 respectively. That is, the bar members connecting between the left side frame 11 and the right side frame 12 are detachably connected to the left side frame 11 and the right side frame 12. Specifically, connecting pieces can be welded at two ends of the first cross bar 13, the second cross bar 14 and the third cross bar 15, hole sites are formed on the connecting pieces, then hole sites are also formed at corresponding positions of the left side frame 11 and the right side frame 12, and then the first cross bar 13, the second cross bar 14 and the third cross bar 15 are connected to the left side frame 11 and the right side frame 12 by connecting pieces (such as screw bolts and the like). Through setting up main body frame 1 to detachable mode, can make things convenient for unified production and make, main body frame 1 is before the equipment moreover, and the volume is littleer, more convenient transportation, and the cabinet volume is bigger, and the cost of transportation is lower.

Of course, in other embodiments, the structures where the first rail 13, the second rail 14, and the third rail 15 are connected to the left side frame 11 and the right side frame 12 may be other ways. For example, two ends of the first cross bar 13, the second cross bar 14 and the third cross bar 15 are directly clamped on the left side frame 11 and the right side frame 12 in a clamping manner; or the two ends of the first cross bar 13, the second cross bar 14 and the third cross bar 15 are provided with threads in a threaded connection mode, and can be directly screwed into threaded holes on the left side frame 11 and the right side frame 12. The present solution is not limited to the detachable connection manner of the main body frame 1, as long as the first cross bar 13, the second cross bar 14, and the third cross bar 15 can be detachably connected with the left side frame 11 and the right side frame 12.

Referring to fig. 4, further, the ganged hinge mechanism 3 includes a connecting rail 31, a left hinge assembly 32, and a right hinge assembly 33. The left hinge assembly 32 and the right hinge assembly 33 are identical in structure and symmetrically disposed, wherein the left hinge assembly 32 is movably mounted on the left side frame 11, and the right hinge assembly 33 is movably mounted on the right side frame 12. The connecting cross bar 31 is connected to the output end of the driving mechanism 2, and both ends are connected to the left hinge assembly 32 and the right hinge assembly 33, respectively. The drive mechanism 2 may push or pull the connecting rail 31 forward or backward. When the driving mechanism 2 pushes the connecting rail 31 forward, the left hinge assembly 32 and the right hinge assembly 33 are extended simultaneously, thereby lifting the leg rest bracket 4 and enlarging the angle between the backrest bracket 5 and the main body frame 1. When the driving mechanism 2 pulls the connecting cross bar 31 backward, the left hinge assembly 32 and the right hinge assembly 33 are contracted synchronously, and the leg rest bracket 4 is retracted and the angle between the backrest bracket 5 and the main body frame 1 is adjusted. The linkage type hinge mechanism 3 enables the leg support bracket 4 and the backrest bracket 5 to be adjusted more stably and smoothly by arranging the left hinge assembly 32 and the right hinge assembly 33. The left hinge assembly 32 and the right hinge assembly 33 can be synchronously adjusted through the connecting cross rod 31, and only one driving mechanism 2 is needed, so that the cost is reduced, and the synchronism is improved. The connecting cross bar 31 can also improve the structural stability of the left hinge assembly 32 and the right hinge assembly 33, and ensure the stability of sofa adjustment.

As previously described, the left hinge assembly 32 and the right hinge assembly 33 are identical in structure; accordingly, only the specific structure of the left hinge assembly 32 will be described in detail in this embodiment, and repetitive description will be avoided.

Referring to fig. 5, in particular, the left hinge assembly 32 includes a first link 321, a second link 322, a third link 323, a fourth link 324, a long bar 325, and a left connection plate 326. One end of the first link 321 and one end of the second link 322 are rotatably connected to the left side frame 11. The other end of the first link 321 is rotatably connected to one end of the third link 323. One end of the second link 322 is rotatably coupled to one end of the fourth link 324. The third link 323 is rotatably connected with the fourth link 324. The other end of the third link 323 and the other end of the fourth link 324 are connected to the leg rest bracket 4. One end of the long rod 325 is rotatably connected to the second link 322, and the other end of the long rod 325 is rotatably connected to the left link 326. The left connecting plate 326 is rotatably connected to the left side frame 11, and the left connecting plate 326 is also connected to the back rest bracket 5. One end of the connecting rail 31 is connected to the second link 322 and the other end of the connecting rail 31 is connected to the second link 322 in the right hinge assembly 33. The structure of the left hinge assembly 32 provided in the present embodiment can simultaneously achieve lifting or retraction of the leg rest bracket 4 and angular adjustment of the backrest bracket 5 by a simple structure.

Referring to fig. 5, the left hinge assembly 32 further includes a fixing plate 327. One end of the first connecting rod 321 and one end of the second connecting rod 322 are rotatably connected with a fixed plate 327, and the fixed plate 327 is fixedly connected with the left side frame 11; that is, one ends of the first link 321 and the second link 322 are rotatably connected to the fixing plate 327, and the first link 321 and the second link 322 are connected to the left side frame 11. By providing the fixing plate 327, the left hinge assembly 32 can be conveniently assembled, and the left hinge assembly 32 is more complete in structure; but also to more conveniently mount the left hinge assembly 32 on the left side frame 11. On the other hand, the fixing plate 327 connects the first link 321 and the second link 322, enabling the extension and retraction of the left hinge assembly 32 to be smoother.

Referring to fig. 4, further, the driving mechanism 2 includes a driving motor 21, a screw 22, and a moving housing 23. The output end of the driving motor 21 is connected with one end of the screw 22 and is used for driving the screw 22 to rotate. The movable housing 23 is sleeved on the screw 22 and is in threaded connection with the screw 22. The drive motor 21 is mounted on the third cross bar 15. The end of the movable housing 23 remote from the drive motor 21 is connected to the linked hinge mechanism 3, in particular to the intermediate position of the connecting rail 31. The driving motor 21 rotates to drive the screw 22 to rotate around the central axis, and the screw 22 rotates to drive the movable housing 23 to move along the vertical direction of the screw 22 relative to the screw 22. The driving motor 21 can realize forward rotation and reverse rotation through control, so that the screw 22 can also rotate forward or reverse rotation, and the movable housing 23 can move in two directions under the action of the screw 22, thereby realizing the purpose of driving the linkage type hinge mechanism 3 to extend or retract.

Referring to fig. 6 and 7, further, a left mounting plate 51 is disposed on the left side of the backrest bracket 5, a slot 511 is disposed on the left mounting plate 51, and a left connecting plate 326 is inserted into the slot 511. It should be noted that the right side of the back rest 5 is also provided with a right mounting plate (not shown) having the same structure as the left mounting plate 51, and the right mounting plate is detachably connected to the right connecting plate (corresponding to the left connecting plate 326) of the right hinge assembly 33. Through the structural design of left mounting panel 51, can realize dismantling the connection between back support 5 and the main body frame 1, and connection structure is simpler, and the connection process is convenient and fast more.

Referring to fig. 1 and 2, further, the sofa frame further includes a plurality of nail-free spring buckles 6 and a plurality of serpentine springs 7. The number of the nail-free spring buckles 6 is twice the number of the snake springs 7. The first cross rod 13 is provided with a plurality of nail-free spring buckles 6, and the nail-free spring buckles 6 are arranged at intervals and have the same interval. The second cross bar 14 is also provided with a plurality of nail-free spring buckles 6, and the nail-free spring buckles 6 are arranged at intervals and have the same interval. The number of the nail-free spring buckles 6 on the first cross rod 13 is the same as the number of the nail-free spring buckles 6 on the second cross rod 14, and the nail-free spring buckles are in one-to-one correspondence. One end of the serpentine spring 7 is mounted on the no-nail snap 6 on the first rail 13 and the other end is mounted on the corresponding no-nail snap 6 on the second rail 14.

Referring to fig. 8 and 9, specifically, the nail-free latch 6 has elastic deformation capability, the nail-free latch 6 includes a main body latch 61, a first elastic portion 62 extending outward is provided at an upper end of the main body latch 61, and a second elastic portion 63 extending outward is provided at a lower end of the main body latch 61. In a natural state, the first elastic portion 62 is located at one side of the second elastic portion 63, and the first elastic portion 62, the second elastic portion 63 and the main body buckle 61 enclose a clamping cavity 64. The first rail 13 or the second rail 14 is inserted into the clamping chamber 64. The first elastic portion 62 and the second elastic portion 63 are respectively provided with a hook cavity 65, and one end of the serpentine spring 7 is hooked in the hook cavity 65. The nail-free spring fastener 6 has elastic deformation capability, and when the nail-free spring fastener is installed, a worker breaks the first elastic part 62 and the second elastic part 63 in opposite directions by hand, so that the first elastic part 62 and the second elastic part 63 are far away from each other to form an opening; next, the first rail 13 or the second rail 14 is inserted into the chucking chamber 64 through this opening, and then the first elastic portion 62 and the second elastic portion 63 are released. The first elastic portion 62 and the second elastic portion 63 are restored to a natural state, i.e., close the opening, by self elastic deformation. After the nail-free spring fastener 6 is installed on the first cross rod 13 or the second cross rod 14, one end of the snake-shaped spring 7 is hooked in the hook cavity 65. After the nail-free spring fastener 6 is arranged on the first cross rod 13 or the second cross rod 14, the positions of the nail-free spring fastener 6 can be adjusted, so that the nail-free spring fasteners 6 on the first cross rod 13 and the second cross rod 14 are in one-to-one correspondence. Through the setting of nail-free spring fastener 6, simplify the spring fastener installation process, serpentine spring 7 installs more simply, swiftly.

Referring to fig. 1 and 10, further, the sofa frame further includes an armrest base plate 8 and a fixing member (not shown). The armrest substrate 8 is provided with first mounting holes 81, specifically three first mounting holes 81 are provided, and the three first mounting holes 81 are arranged in a triangle shape. The left side frame 11 and the right side frame 12 are each provided with a second mounting hole 16 corresponding to the first mounting hole 81. Three second mounting holes 16 are formed in the left side frame 11 and the right side frame 12, the three second mounting holes 16 are also arranged in a triangular shape, and the second mounting holes 16 are in one-to-one correspondence with the first mounting holes 81. The fixing member is inserted into the second mounting hole 16 through the first mounting hole 81 to mount the armrest substrate 8 on both the left side frame 11 and the right side frame 12. The fixing piece can be common parts such as bolts, screws and the like. Through seting up first mounting hole 81 and second mounting hole 16 in advance, can make the relative main body frame 1 demountable installation of handrail base plate 8, can install handrail base plate 8 through screwing, the installation is simpler and easy, and the installation rate is faster.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A sofa frame, comprising:

a main body frame (1);

A drive mechanism (2) mounted on the main body frame (1);

A linked hinge mechanism (3) movably mounted on the main body frame (1) and connected with the output end of the driving mechanism (2);

A leg support bracket (4) mounted at one end of the linked hinge mechanism (3) near the front of the main body frame (1);

A backrest bracket (5) detachably mounted at one end of the linked hinge mechanism (3) near the rear of the main body frame (1);

The driving mechanism (2) can drive the linkage type hinge mechanism (3) to extend or retract, so as to adjust the leg support bracket (4) to lift or retract and adjust the angle between the backrest bracket (5) and the main body frame (1).

2. A sofa frame according to claim 1, characterized in that the main body frame (1) comprises a left side frame (11), a right side frame (12), a first cross bar (13), a second cross bar (14) and a third cross bar (15), the left side frame (11) and the right side frame (12) being opposite and spaced apart; two ends of the first cross bar (13) are respectively connected with the left side frame (11) and the right side frame (12) and are positioned near the front of the leg support bracket (4), two ends of the second cross bar (14) are respectively connected with the left side frame (11) and the right side frame (12) and are positioned near the rear of the backrest bracket (5), and two ends of the third cross bar (15) are respectively connected with the left side frame (11) and the right side frame (12) and are positioned below the second cross bar (14); the driving mechanism (2) is mounted on the third cross bar (15).

3. Sofa frame according to claim 2, characterized in that the two ends of the first cross bar (13) are detachably connected with the left side frame (11) and the right side frame (12), the two ends of the second cross bar (14) are detachably connected with the left side frame (11) and the right side frame (12), and the two ends of the third cross bar (15) are detachably connected with the left side frame (11) and the right side frame (12).

4. A sofa frame according to claim 2 or 3, characterized in that the linkage hinge mechanism (3) comprises a connecting cross bar (31), a left hinge assembly (32) and a right hinge assembly (33), the left hinge assembly (32) is movably mounted on the left side frame (11), the right hinge assembly (33) is movably mounted on the right side frame (12), the connecting cross bar (31) is connected with the output end of the driving mechanism (2), two ends of the connecting cross bar are respectively connected with the left hinge assembly (32) and the right hinge assembly (33), and the left hinge assembly (32) and the right hinge assembly (33) are identical in structure.

5. The sofa frame according to claim 4, wherein said left hinge assembly (32) comprises a first link (321), a second link (322), a third link (323), a fourth link (324), a long bar (325) and a left connecting plate (326); one end of the first connecting rod (321) and one end of the second connecting rod (322) are rotatably connected with the left side frame (11), the other end of the first connecting rod (321) is rotatably connected with one end of the third connecting rod (323), the other end of the second connecting rod (322) is rotatably connected with one end of the fourth connecting rod (324), the third connecting rod (323) is rotatably connected with the fourth connecting rod (324), and the other end of the third connecting rod (323) and the other end of the fourth connecting rod (324) are connected with the leg support bracket (4); one end of the long rod (325) is rotatably connected with the second connecting rod (322), the other end of the long rod is rotatably connected with the left connecting plate (326), and the left connecting plate (326) is rotatably connected with the left side frame (11) and the backrest bracket (5); one end of the connecting cross rod (31) is connected with the second connecting rod (322).

6. The sofa frame according to claim 5, wherein said left hinge assembly (32) further comprises a fixing plate (327), one end of said first link (321) and one end of said second link (322) are rotatably connected to said fixing plate (327), and said fixing plate (327) is fixedly connected to said left side frame (11).

7. A sofa frame according to claim 2 or 3, characterized in that the driving mechanism (2) comprises a driving motor (21), a screw rod (22) and a movable housing (23), the driving motor (21) is connected with one end of the screw rod (22) and is used for driving the screw rod (22) to rotate, the movable housing (23) is sleeved on the screw rod (22) and is in threaded connection with the screw rod (22), the driving motor (21) is mounted on the third cross rod (15), and one end of the movable housing (23) far away from the driving motor (21) is connected with the linkage hinge mechanism (3).

8. The sofa frame according to claim 2, further comprising a plurality of nail-free spring buckles (6) and a plurality of serpentine springs (7), wherein the first cross bar (13) and the second cross bar (14) are provided with a plurality of nail-free spring buckles (6), one end of each serpentine spring (7) is arranged on the nail-free spring buckle (6) on the first cross bar (13), and the other end is arranged on the corresponding nail-free spring buckle (6) on the second cross bar (14).

9. The sofa frame according to claim 8, characterized in that the nail-free spring fastener (6) has elastic deformation capability, the nail-free spring fastener (6) comprises a main body fastener (61), a first elastic part (62) extending outwards is arranged at the upper end of the main body fastener (61), and a second elastic part (63) extending outwards is arranged at the lower end of the main body fastener (61); in a natural state, the first elastic part (62) is located at one side of the second elastic part (63), the first elastic part (62), the second elastic part (63) and the main body buckle (61) are enclosed to form a clamping cavity (64), and the clamping cavity (64) is used for clamping the first cross rod (13) or the second cross rod (14); the first elastic part (62) and the second elastic part (63) are respectively provided with a clamping hook cavity (65), and one end of the snake-shaped spring (7) is hooked in the clamping hook cavity (65).

10. A sofa frame according to claim 2 or 3, further comprising an armrest substrate (8) and a fixing member, wherein a first mounting hole (81) is formed in the armrest substrate (8), second mounting holes (16) corresponding to the first mounting holes (81) are formed in the left side frame (11) and the right side frame (12), and the fixing member penetrates through the first mounting holes (81) and is embedded into the second mounting holes (16) so that the armrest substrate (8) is mounted on the left side frame (11) and the right side frame (12).