A sofa with a back frame easy to disassemble and assemble

Abstract

This utility model discloses a sofa with a simple detachable back frame, including a sofa body, a sofa back frame, a locking component, and a positioning component. The sofa back frame has locking holes and limiting holes that cooperate with the locking and positioning components. The locking component extends into the locking hole, with its outer end larger than its inner end; it can engage with the locking hole when the sofa back frame moves upwards relative to it. The outer end of the positioning component can extend into the limiting hole when the sofa back frame moves downwards to its limit position. This utility model, by setting up the locking and positioning components, in conjunction with the locking and limiting holes on the sofa back frame, completes the snap-fit ​​fixing between the sofa back frame and the armrest frame. This allows workers to only need to define the relative positions of the sofa back frame and armrest frame when connecting them, and the sofa back frame can be assembled without the need for external tools; disassembly does not require removing screws one by one, reducing the workload of workers.

Description

Technical Field

[0001] This utility model belongs to the field of sofa technology, specifically relating to a sofa with a back frame that is easy to assemble and disassemble. Background Technology

[0002] Sofas on the market generally come in two types: detachable sofas and one-piece sofas. One-piece sofas have their backrest and seat molded as a single piece, and these parts cannot be removed. These sofas are typically large and heavy, making them inconvenient to move and store, and increasing transportation costs.

[0003] Existing modular sofas mainly disassemble the sofa into seat frames, armrest frames, backrest frames, etc., and use screws to connect them during assembly, which facilitates packaging, transportation and maintenance.

[0004] However, in the actual assembly process, external tools such as wrenches and screwdrivers are required, which makes assembly inconvenient. In addition, workers need to use screwdrivers to connect and fix the backrest frame and armrest frame while defining the relative positions of the backrest frame and armrest frame, which is difficult and inconvenient. Utility Model Content

[0005] To overcome the shortcomings of existing technology, this utility model provides a sofa with an easily detachable back frame, so as to solve the technical problem of inconvenient operation when assembling and disassembling the backrest frame and armrest frame.

[0006] To achieve the above objectives, the specific technical solution of this utility model is as follows: A sofa with an easily detachable back frame includes a sofa body, a sofa back frame, and locking and positioning components installed on the sofa body. The sofa back frame has locking holes and limiting holes sequentially formed on it to cooperate with the locking and positioning components.

[0007] The locking component extends into the locking hole, and the outer end is larger than the inner end; it can engage with the locking hole when it moves upward relative to the sofa back frame. The outer end of the positioning component can extend into the limiting hole when the sofa back frame moves down to its limit position.

[0008] Furthermore, the locking assembly includes a back metal plate and a locking device fixed to the back panel. The back metal plate is fixed to the sofa body by screws. The locking device is divided into a connecting part and a snap-fit ​​part from the inside out. The diameter of the snap-fit ​​part is larger than the diameter of the connecting part.

[0009] Furthermore, there are two locking fasteners, which are fixed to the back patch at an interval.

[0010] Furthermore, the locking device uses rivets. The rivets are fixed to the back patch by welding.

[0011] Furthermore, the locking hole is a teardrop-shaped hole, divided into a mounting part and a locking part from bottom to top. The diameter of the mounting part is larger than the diameter of the snap-fit ​​part on the locking fastener; the diameter of the locking part is smaller than the diameter of the snap-fit ​​part on the locking fastener, and is greater than or equal to the diameter of the connecting part.

[0012] Furthermore, the positioning component includes a positioning pin and an elastic element. The sofa body has mounting holes that mate with the positioning pin. The elastic element and the positioning pin are sequentially installed in the mounting holes. The elastic element can deform and compress when the positioning pin is compressed, and when the internal pressure is released, it drives the positioning pin to extend outward into the upper limit hole of the sofa back frame.

[0013] Furthermore, the elastic element is a spring.

[0014] Furthermore, the sofa back frame includes a back frame support and frame plate assemblies disposed on both sides of the back frame support. The frame plate assembly includes an outer frame plate and a locking plate that are fitted together. Locking holes and limiting holes are both formed on the locking plate. The outer frame plate has transition holes and secondary holes corresponding to the locking holes and limiting holes. The inner circle dimensions of the transition holes and secondary holes are both larger than the inner circle dimensions of the corresponding locking holes and limiting holes.

[0015] Furthermore, the outer frame plate and the locking plate are integrally formed plates, and the secondary hole is a tapered hole with a larger outer diameter and a smaller inner diameter. The diameter of the inner hole in the secondary hole is the same as the diameter of the limiting hole.

[0016] Furthermore, the sofa body includes a seat base frame, a seat board, and two independent armrest frames. Each armrest frame is equipped with a locking component; a positioning component is installed on one of the armrest frames.

[0017] Compared with the prior art, the present invention has the following advantages: This utility model, by setting up locking and positioning components, together with locking holes and limiting holes on the sofa back frame, completes the snap-fit ​​fixing between the sofa back frame and the armrest frame. This allows workers to only limit the relative positions of the two when connecting the sofa back frame and the armrest frame, and the sofa back frame can be assembled without the aid of external tools. When disassembling, there is no need to remove screws one by one, reducing the workload of workers. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram showing the relative positions of the locking component and the sofa back frame in Embodiment 1 of this utility model. Figure 1 (Enlarged view of part A in the middle) Figure 3 This is a schematic diagram of the sofa back frame in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the locking component in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the positioning process of the positioning component in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the positioning process of the positioning component in Embodiment 2 of this utility model.

[0019] Reference numerals in the attached drawings: 1. Sofa body; 1-1. Seat board; 1-2. Armrest frame; 2. Sofa back frame; 2-1. Back frame support; 2-2. Outer frame panel; 2-3. Locking plate; 2-4. Secondary hole; 3. Locking assembly; 3-1. Back iron plate; 3-2. Locking element; 4. Positioning assembly; 4-1. Positioning pin; 4-2. Elastic element; 5. Locking hole; 6. Limiting hole. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 and 2 As shown, a sofa with an easily detachable back frame includes a sofa body 1, a sofa back frame 2, and a locking component 3 and a positioning component 4 installed on the sofa body 1. The sofa back frame 2 has locking holes 5 and limiting holes 6 that cooperate with the locking component 3 and the positioning component 4.

[0024] The locking component 3 extends into the locking hole 5, and the outer end is larger than the inner end; it can engage with the locking hole 5 when it moves upward relative to the sofa back frame 2, thereby locking the position of the sofa back frame 2 in the horizontal direction.

[0025] The outer end of the positioning component 4 can extend into the limiting hole 6 when the sofa back frame 2 moves down to its limit position, thereby locking the vertical position of the sofa back frame 2.

[0026] like Figure 1 As shown, the sofa body 1 includes a seat base frame, a seat board 1-1, and two independent armrest frames 1-2. Each armrest frame 1-2 is equipped with a locking component 3; one armrest frame 1-2 also has a positioning component 4. The two ends of the sofa back frame 2 are fixed to the back frame portion of the armrest frame 1-2 via the locking components 3. The two ends of the seat base frame are connected to the support portions of the two armrest frames 1-2 via screws, further securing the two armrest frames 1-2. The seat board 1-1 is fixed to the top surface of the seat base frame.

[0027] like Figure 2 and 4 As shown, the locking assembly 3 includes a back iron plate 3-1 and a locking member 3-2 fixed to the back plate. The back iron plate 3-1 is fixed to the sofa body 1 by screws. The locking member 3-2 is divided into a connecting part and a snap-fit ​​part from the inside out. The diameter of the snap-fit ​​part is larger than the diameter of the connecting part. When the snap-fit ​​part of the locking member 3-2 passes through the locking hole 5 located on the sofa back frame 2, and the connecting part is located in the locking hole 5, the sofa back frame 2 is pressed down until the connecting part on the locking member 3-2 abuts against the wall of the locking hole 5. The snap-fit ​​part of the locking member 3-2 forms a horizontal position lock for the sofa back frame 2.

[0028] Furthermore, there are two locking fasteners 3-2, which are fixed to the back patch at intervals.

[0029] In this embodiment, the locking device 3-2 is a rivet. The rivet is fixed to the back patch by welding.

[0030] like Figure 3 As shown, the locking hole 5 is a teardrop-shaped hole, divided into a mounting part and a locking part from bottom to top. The diameter of the mounting part is larger than the diameter of the snap-fit ​​part on the locking fastener 3-2. The diameter of the locking part is smaller than the diameter of the snap-fit ​​part on the locking fastener 3-2, but greater than or equal to the diameter of the connecting part.

[0031] like Figure 4 and 5 As shown, the positioning component 4 includes a positioning pin 4-1 and an elastic element 4-2. The sofa body 1 has a mounting hole that mates with the positioning pin 4-1. The elastic element 4-2 and the positioning pin 4-1 are sequentially installed in the mounting hole. The elastic element 4-2 can deform and compress when the positioning pin 4-1 is compressed, and when the internal pressure is released, it drives the positioning pin 4-1 to extend outward into the upper limit hole 6 of the sofa back frame 2, thereby locking the vertical position of the sofa back frame 2. In this embodiment, the elastic element 4-2 is a spring.

[0032] like Figure 3As shown, the sofa back frame 2 includes a back frame support 2-1 and frame plate assemblies disposed on both sides of the back frame support 2-1. The frame plate assemblies include an outer frame plate 2-2 and a locking plate 2-3 that are fitted together. Locking holes 5 and limiting holes 6 are both formed on the locking plate 2-3. The outer frame plate 2-2 has transition holes and secondary holes 2-4 corresponding to the locking holes 5 and limiting holes 6. In this embodiment, the inner dimensions of the transition holes and secondary holes 2-4 are both larger than the inner dimensions of their corresponding locking holes 5 and limiting holes 6.

[0033] In actual use, when there is an error in the spacing between the two rivets fixed to the back panel, the sofa back frame 2 is difficult to press down to its limit position. The positioning pin 4-1 will extend into the secondary hole 2-4. Through the cooperation between the secondary hole 2-4 and the positioning pin 4-1, the vertical position of the sofa back frame 2 is locked.

[0034] The installation principle of this utility model is as follows: First, connect and secure one end of the sofa back frame 2 to one of the armrest frames 1-2. The locking fastener 3-2 on the armrest frame 1-2 extends into the locking hole 5 on the corresponding end of the sofa back frame 2. Next, initially press the sofa back frame 2 down relative to the armrest frame 1-2, causing the snap-fit ​​part of the locking fastener 3-2 to engage with the locking hole 5, thus achieving initial locking between the sofa back frame 2 and the armrest frame 1-2. Then, secure the other armrest frame 1-2 to the other end of the sofa back frame 2.

[0035] After the initial fixing of both ends of the sofa back frame 2 to the two armrest frames 1-2 is completed, manually press the positioning pin 4-1 into the mounting hole. Then press the sofa back frame 2 further down. When the end of the sofa back frame 2 moves down to the position of the positioning pin 4-1, release the pressure applied to the positioning pin 4-1. The positioning pin 4-1, which is blocking the end of the sofa back frame 2, remains retracted in the mounting hole. As the sofa back frame 2 continues to be pressed down, the positioning pin 4-1 gradually aligns with the secondary hole 2-4 and the limiting hole 6 on the sofa back frame 2. The spring located at the inner end of the positioning pin 4-1 applies an outward force to the positioning pin 4-1, allowing it to extend into the limiting hole 6, thereby locking the vertical position of the sofa back frame 2.

[0036] Subsequently, the two ends of the base frame are connected to the support parts of the two handrail frames 1-2 with screws to further connect and fix the two handrail frames 1-2. Then, the seat plate 1-1 is fixed to the top surface of the base frame.

[0037] When the sofa needs to be disassembled for storage, the seat panel 1-1 and the seat base frame are removed first, making the two armrest frames 1-2 independent units. Then, the workers disassemble the corresponding ends of the two armrest frames 1-2 and the sofa back frame 2 one by one. When removing the armrest frame 1-2 with the positioning component 4, the workers use an external tool (such as a screwdriver) to press the positioning pin 4-1 inward until it is flush with the opening of the mounting hole. Then, the workers lift the sofa back frame 2 so that the connecting part of the locking hole 5 on the sofa back frame 2 aligns with the locking fastener 3-2 on the armrest frame 1-2. The workers then push the armrest frame 1-2 outward to complete the disassembly of the armrest frame 1-2 from the sofa back frame 2.

[0038] Example 2

[0039] like Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the outer frame plate 2-2 and the locking plate 2-3 are integrally formed plates, and the secondary hole 2-4 is a tapered hole with a larger outer diameter and a smaller inner diameter. The diameter of the inner hole in the secondary hole 2-4 is the same as the diameter of the limiting hole 6.

[0040] When the locating pin 4-1 is inserted into the secondary hole 2-4, it will move towards the limiting hole 6 under the guidance of the hole wall of the secondary hole 2-4 until it is inserted into the limiting hole 6.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sofa with an easily detachable back frame, comprising a sofa body (1) and a sofa back frame (2), characterized in that: It also includes a locking component (3) and a positioning component (4) installed on the sofa body (1); the sofa back frame (2) is provided with a locking hole (5) and a limiting hole (6) that cooperate with the locking component (3) and the positioning component (4) in sequence. The locking component (3) extends into the locking hole (5), and the outer end dimension is larger than the inner end dimension; it can engage with the locking hole (5) when it moves upward relative to the sofa back frame (2); The outer end of the positioning component (4) can extend into the limiting hole (6) when the sofa back frame (2) moves down to the limit position.

2. A sofa with a easily detachable back frame according to claim 1, characterized in that: The locking assembly (3) includes a back iron plate (3-1) and a locking device (3-2) fixed on the back plate; the back iron plate (3-1) is fixed to the sofa body (1) by screws; the locking device (3-2) is divided into a connecting part and a snap-fit ​​part from the inside to the outside; the diameter of the snap-fit ​​part is larger than the diameter of the connecting part.

3. A sofa with a easily detachable back frame according to claim 2, characterized in that: There are two locking fasteners (3-2), and the two locking fasteners (3-2) are fixed on the back patch at intervals.

4. A sofa with a easily detachable back frame according to claim 2, characterized in that: The locking fastener (3-2) is a rivet; the rivet is fixed to the back patch by welding.

5. A sofa with a easily detachable back frame according to claim 2, characterized in that: The locking hole (5) is a teardrop-shaped hole, which is divided into an installation part and a locking part from bottom to top; the diameter of the installation part is larger than the diameter of the snap-fit ​​part on the locking fastener (3-2); the diameter of the locking part is smaller than the diameter of the snap-fit ​​part on the locking fastener, and is greater than or equal to the diameter of the connecting part.

6. A sofa with a easily detachable back frame according to claim 1, characterized in that: The positioning component (4) includes a positioning pin (4-1) and an elastic element (4-2); wherein, the sofa body (1) is provided with a mounting hole that cooperates with the positioning pin (4-1); the elastic element (4-2) and the positioning pin (4-1) are installed in the mounting hole in sequence; the elastic element (4-2) can deform and compress when the positioning pin (4-1) is compressed inward, and when the inward pressure is removed, it drives the positioning pin (4-1) to extend outward into the upper limit hole (6) of the sofa back frame (2).

7. A sofa with a easily detachable back frame according to claim 6, characterized in that: The elastic element (4-2) is a spring.

8. A sofa with a easily detachable back frame according to claim 1, characterized in that: The sofa back frame (2) includes a back frame support (2-1) and frame plate assemblies arranged on both sides of the back frame support (2-1); the frame plate assembly includes an outer frame plate (2-2) and a locking plate (2-3) that are fitted together; the locking hole (5) and the limiting hole (6) are both opened on the locking plate (2-3); the outer frame plate (2-2) is provided with a transition hole and a secondary hole (2-4) corresponding to the locking hole (5) and the limiting hole (6); the inner circle size of the transition hole and the secondary hole (2-4) is larger than the inner circle size of the corresponding locking hole (5) and the limiting hole (6).

9. A sofa with a easily detachable back frame according to claim 8, characterized in that: The outer frame plate (2-2) and the locking plate (2-3) are integrally formed plates, and the secondary hole (2-4) is a tapered hole with a larger outer diameter and a smaller inner diameter; the inner diameter of the secondary hole (2-4) is the same as the diameter of the limiting hole (6).

10. A sofa with a easily detachable back frame according to claim 1, characterized in that: The main body of the sofa (1) includes a seat base frame, a seat board (1-1) and two independent armrest frames (1-2); each of the two armrest frames (1-2) is provided with a locking component (3); a positioning component (4) is installed on one of the armrest frames (1-2).

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