Assembling and connecting structure of sofa framework and backrest framework

Abstract

The utility model relates to an assembly connecting structure of a sofa framework and a backrest framework, which comprises a fixed arm connected with the sofa framework and a connecting arm connected with the backrest framework and having a first state and a second state, and the connecting arm is movably connected with the fixed arm; the connecting arm is movably switched to a first state or a second state; the connecting arm vertically extends out of the fixed arm in a first state, the connecting arm is folded on the fixed arm in a second state, and the movable connecting arm is arranged on the fixed arm, so that when the sofa framework and the backrest framework are mounted, the connecting arm moves to the first state, and the connecting arm vertically extends out of the fixed arm to be connected with the backrest framework; and when the sofa framework is in a shipment and loading state, the connecting arm moves to the second state, and the connecting arm is folded on the fixed arm, so that the technical problems that the traditional connecting arm extends out of the fixed arm during shipment, and the fixed arm is easy to pierce a package of the sofa framework or a sponge bag supported on the sofa framework in the transportation process and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sofa accessory installation, in particular to an assembly connection structure of a sofa frame and a backrest frame. Background Art

[0002] See also Figure 1 The existing sofa frame is provided with a connecting component A connected to the backrest frame, one end of the connecting component A is fixed on the sofa frame, and the other end extends upward and is connected to the backrest frame, and the connecting component A here is an integral part; when the sofa frame is shipped as a sofa accessory, the connecting component A extending upward will cause the overall packaging volume to be larger and the transportation cost to be higher; in addition, during transportation, several sofa frames and accessories such as sponges are placed in an up-and-down stacking manner, and the connecting component A extending upward constitutes a relatively sharp position. The up-and-down shaking during transportation will cause the connecting component A to pierce its own packaging, and may even pierce other packaging and damage other sofa frames or accessories such as sponges, or the connecting component A may be bent and deformed by external impact force during transportation, thereby affecting the later installation of the sofa frame and increasing the scrap rate.

[0003] Therefore, further improvement is needed. Utility Model Content

[0004] The purpose of the utility model is to provide an assembly connection structure of a sofa frame and a backrest frame, wherein the foldable connecting arm can reduce the packaging volume of the sofa frame, reduce the transportation cost, and at the same time avoid damage to other products or damage to the frame itself during transportation.

[0005] The purpose of the utility model is achieved in this way:

[0006] The invention discloses an assembly connection structure of a sofa frame and a backrest frame, comprising a fixed arm connected to the sofa frame, and a connecting arm connected to the backrest frame and having a first state and a second state, wherein the connecting arm is movably connected to the fixed arm; the connecting arm is switched to the first state or the second state by movement; when the sofa frame and the backrest frame are assembled and connected, the connecting arm is in the first state, the connecting arm extends upward relative to the fixed arm and is connected to the backrest frame; during transportation, the connecting arm is in the second state, the connecting arm extends horizontally or longitudinally relative to the fixed arm; the technical problems of large packaging volume, high transportation cost, easy puncture of outer packaging to damage other sofa frames or accessories such as sponge bodies, and easy scrapping of connecting parts due to external forces are solved.

[0007] A connecting portion for inserting a rotating shaft is provided between the fixed arm and the connecting arm. The fixed arm and the connecting arm are rotationally connected via the rotating shaft and the connecting portion. The rotating shaft forms a rotating fulcrum for the connecting arm to rotate on the fixed arm.

[0008] The fixed arm is rotatably connected to the connecting arm, and a stepless rotating part, a stepped rotating part or a damping rotating part is provided between the fixed arm and the connecting arm; the connecting arm is positioned and rotated on the fixed arm through the stepless rotating part, the stepped rotating part or the damping rotating part.

[0009] By providing a stepless rotating part, a stepped rotating part or a damping rotating part, when the connecting arm rotates to a certain position angle on the fixed arm, the connecting arm is positioned at the position angle through the stepless rotating part, the stepped rotating part or the damping rotating part.

[0010] A limiting groove is provided on the fixed arm, and a limiting block is provided on the connecting arm. When the connecting arm is in the first state, the limiting block is limited on the limiting groove to limit the maximum rotation angle of the connecting arm in the first state.

[0011] Both sides of the fixed arm are provided with fixed blocks, and both sides of the connecting arm are provided with connecting blocks. When the connecting arm is movably connected with the fixed arm, the connecting blocks on both sides of the connecting arm are limited between the fixed blocks on both sides of the fixed arm.

[0012] When the connecting arm switches from the first state to the second state, the connecting block rotates with the connecting arm. When the connecting block abuts against the fixed arm, the connecting arm is controlled to be in the maximum rotation angle of the second state. At this time, an angle is formed between the connecting arm and the fixed arm, which can be an acute angle, a right angle or an obtuse angle.

[0013] Fixed blocks are respectively bent on both sides of the fixed arm, and connecting blocks are respectively bent on both sides of the connecting arm. Connecting parts for inserting the rotating shaft are provided on the fixed blocks and the connecting blocks.

[0014] The connecting arm is provided with a buckling hole connected to the backrest frame, the backrest frame is provided with a connecting accessory plugged into the connecting arm, and the connecting accessory is provided with an elastic buckle; when the connecting accessory is connected to the connecting arm, the elastic buckle is locked on the buckling hole; when the connecting accessory is separated from the connecting arm, the elastic buckle elastically deforms and disengages from the buckling hole.

[0015] A guiding inclined surface is arranged on the connecting arm, and the connecting fittings of the backrest frame are plugged into the connecting arm along the guiding inclined surface.

[0016] The connecting arm is also provided with an assembly hole for fixedly connecting with the backrest frame.

[0017] The fixed arm is provided with a fixing hole which is fixedly connected with the sofa frame.

[0018] The beneficial effects of the utility model are as follows:

[0019] The connecting arm is movably connected to the fixed arm, and the connecting arm is switched to the first state or the second state through the movement; when the sofa frame and the backrest frame are installed, the connecting arm is moved to the first state, and the connecting arm is vertically extended on the fixed arm to be connected with the backrest frame; when the sofa frame is in the process of shipping or loading, the connecting arm is moved to the second state, and the connecting arm is folded on the fixed arm, so as to solve the technical problems that the traditional connecting arm is extended on the fixed arm during shipping, and the fixed arm is easy to pierce the packaging of the sofa frame or the sponge bag supported on the sofa frame during transportation; in addition, when the sofa frame is in the process of shipping or loading, the connecting arm is folded on the fixed arm, and the volume of the sofa frame is reduced, which can save transportation space and packaging costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of a sofa iron frame in the prior art having a fixed arm and a connecting arm.

[0021] Figure 2 This is a schematic diagram of a structure in which a sofa iron frame is provided with a movable connecting arm in one embodiment of the utility model, and a schematic diagram of a three-dimensional structure in which the connecting arm is in a first state.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting arm in the second state in one embodiment of the utility model.

[0023] Figure 4 It is a schematic plan view of the structure of the sofa iron frame in a packaging state in one embodiment of the utility model.

[0024] Figure 5 It is a planar structural schematic diagram of the sofa iron frame in use state in one embodiment of the utility model.

[0025] Figure 6 It is a schematic diagram of the assembly and decomposition structure of the connecting arm and the fixed arm in one embodiment of the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 2-Figure 6 An assembly connection structure of a sofa frame and a backrest frame includes a fixed arm 2 connected to the sofa frame 1, and also includes a connecting arm 3 connected to the backrest frame and having a first state and a second state, the connecting arm 3 is movably connected to the fixed arm 2; the connecting arm 3 is switched to the first state or the second state by movement; the connecting arm 3 is vertically extended on the fixed arm 2 in the first state, and the connecting arm 3 is folded on the fixed arm 2 in the second state.

[0028] A connecting portion 5 for inserting a rotating shaft 4 is provided between the fixed arm 2 and the connecting arm 3. The fixed arm 2 and the connecting arm 3 are rotatably connected via the rotating shaft 4 and the connecting portion 5. The rotating shaft 4 forms a rotating fulcrum for the connecting arm 3 to rotate on the fixed arm 2.

[0029] The fixed arm 2 is rotationally connected to the connecting arm 3, and a stepless rotating part, a stepped rotating part or a damping rotating part is provided between the fixed arm 2 and the connecting arm 3; the connecting arm 3 is positioned and rotated on the fixed arm 2 through the stepless rotating part, the stepped rotating part or the damping rotating part.

[0030] In this embodiment, a gear is provided on the rotating shaft 4, and an arc-shaped tooth groove arranged to mesh and rotate with the gear is provided on the connecting arm 3, and the gear and the tooth groove form a stepped rotating part.

[0031] In this embodiment, an elastic damping sheet is provided on the rotating shaft 4 and acts on the connecting arm 3. The elastic damping sheet hinders the rotation of the connecting arm 3, and the elastic damping sheet forms a damping rotation part.

[0032] A limiting groove 6 is provided on the fixed arm 2 , and a limiting block 7 is provided on the connecting arm 3 . When the connecting arm 3 is in the first state, the limiting block 7 is limited on the limiting groove 6 .

[0033] Fixed blocks 8 are provided on both sides of the fixed arm 2, and connecting blocks 9 are provided on both sides of the connecting arm 3. When the connecting arm 3 is movably connected to the fixed arm 2, the connecting blocks 9 on both sides of the connecting arm 3 are limited between the fixed blocks 8 on both sides of the fixed arm 2.

[0034] Fixed blocks 8 are bent on both sides of the fixed arm 2, and connecting blocks 9 are bent on both sides of the connecting arm 3. Both the fixed blocks 8 and the connecting blocks 9 are provided with connecting parts 5 for inserting the rotating shaft 4.

[0035] In this embodiment, the connecting portion 5 is an axial hole, and the axial hole is circular or hexagonal.

[0036] The connecting arm 3 is provided with a buckling hole 10 connected to the backrest frame, the backrest frame is provided with a connecting accessory plugged into the connecting arm 3, and the connecting accessory is provided with an elastic buckle; when the connecting accessory is connected to the connecting arm 3, the elastic buckle is locked on the buckling hole 10; when the connecting accessory is separated from the connecting arm 3, the elastic buckle elastically deforms and disengages from the buckling hole 10.

[0037] A guiding inclined surface 11 is provided on the connecting arm 3 , and the connecting fittings of the backrest frame are plugged into the connecting arm 3 along the guiding inclined surface 11 .

[0038] The connecting arm 3 is also provided with an assembly hole 13 for fixedly connecting with the backrest frame.

[0039] The fixed arm 2 is provided with a fixing hole 12 for fixedly connecting with the sofa frame 1. The fixed arm 2 can be fixedly connected with the sofa frame 1 by screws.

[0040] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An assembly connection structure of a sofa frame and a backrest frame, comprising a fixed arm (2) connected to the sofa frame (1), characterized in that: It also comprises a connecting arm (3) connected to the backrest frame and having a first state and a second state, the connecting arm (3) being movably connected to the fixed arm (2); the connecting arm (3) being switched to the first state or the second state by movement; when the sofa frame and the backrest frame are assembled and connected, the connecting arm (3) is in the first state, the connecting arm (3) extends upward relative to the fixed arm (2) and is connected to the backrest frame; during transportation, the connecting arm (3) is in the second state, the connecting arm (3) extends horizontally or longitudinally relative to the fixed arm (2).

2. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: A connecting portion (5) for inserting a rotating shaft (4) is provided between the fixed arm (2) and the connecting arm (3); the fixed arm (2) and the connecting arm (3) are rotatably connected via the rotating shaft (4) and the connecting portion (5); the rotating shaft (4) forms a rotation fulcrum for the connecting arm (3) to rotate on the fixed arm (2).

3. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: The fixed arm (2) is rotatably connected to the connecting arm (3); a stepless rotating part, a stepped rotating part or a damping rotating part is provided between the fixed arm (2) and the connecting arm (3); the connecting arm (3) is positioned and rotated on the fixed arm (2) via the stepless rotating part, the stepped rotating part or the damping rotating part.

4. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: A limiting groove (6) is provided on the fixed arm (2), a limiting block (7) is provided on the connecting arm (3), and when the connecting arm (3) is in a first state, the limiting block (7) is limited on the limiting groove (6).

5. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: Both sides of the fixed arm (2) are provided with fixed blocks (8), and both sides of the connecting arm (3) are provided with connecting blocks (9). When the connecting arm (3) and the fixed arm (2) are movably connected, the connecting blocks (9) on both sides of the connecting arm (3) are limited between the fixed blocks (8) on both sides of the fixed arm (2).

6. The assembly connection structure of the sofa frame and the backrest frame according to claim 5, characterized in that: Fixed blocks (8) are respectively bent on both sides of the fixed arm (2), and connecting blocks (9) are respectively bent on both sides of the connecting arm (3). Both the fixed block (8) and the connecting block (9) are provided with connecting portions (5) for inserting the rotating shaft (4).

7. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: The connecting arm (3) is provided with a buckling hole (10) for connecting with the backrest frame, the backrest frame is provided with a connecting accessory for plugging with the connecting arm (3), and the connecting accessory is provided with an elastic buckle; when the connecting accessory is connected to the connecting arm (3), the elastic buckle is locked on the buckling hole (10); when the connecting accessory is separated from the connecting arm (3), the elastic buckle is elastically deformed and detaches from the buckling hole (10).

8. The assembly connection structure of the sofa frame and the backrest frame according to claim 7, characterized in that: A guiding inclined surface (11) is provided on the connecting arm (3), and the connecting fittings of the backrest frame are plugged into the connecting arm (3) along the guiding inclined surface (11).

9. The assembly connection structure of the sofa frame and the backrest frame according to claim 7, characterized in that: The connecting arm (3) is also provided with an assembly hole (13) for fixedly connecting with the backrest frame.

10. The assembly connection structure of the sofa frame and the backrest frame according to claim 1, characterized in that: The fixed arm (2) is provided with a fixing hole (12) for fixedly connecting with the sofa frame (1).

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