A connecting structure for a furniture bracket and its installation method

Abstract

A connecting structure and installation method for a furniture bracket include a first connector, a second connector, a connecting seat, a movable nut, a first connecting bolt, and a second connecting bolt. Both the first and second connectors are hollow tubular structures. A first mounting hole is formed on the side wall of the second connector. The connecting seat is located on the outside of the second connector, and has a second mounting hole corresponding to the first mounting hole. The connecting seat also has a mounting surface for mates with the first connector and a connecting portion for connection by the second connecting bolt. This invention has at least the following advantages: It employs a non-welded connection method using a connecting seat, a movable nut, and bolts to achieve a reliable connection between the first and second connectors, avoiding the high dependence on operator skill levels in traditional welding processes.

Description

Technical Field

[0001] This invention relates to the field of furniture connection technology, and in particular to a connection structure for a furniture bracket and its installation method. Background Technology

[0002] Furniture frames are widely used in chairs, tables, cabinets, and various other furniture products, primarily to support the overall structure of the furniture. In existing technology, furniture frames are typically made of metal tubing, such as steel, aluminum alloy, or stainless steel tubing, and form an overall support frame structure through connections between beams and uprights.

[0003] In traditional technical solutions, the crossbeams and uprights of furniture frames are mostly connected by welding. For example, the ends of the crossbeams are arc-welded or gas-shielded welded to the outer wall of the uprights or the connection points of the uprights to achieve a fixed connection. Although this welding connection method results in a relatively robust structure, it still has many shortcomings in actual production.

[0004] First, welding connections require a high level of skill from the operator, and the welding quality largely depends on the welder's experience and proficiency. Improper welding process control can easily lead to welding defects such as porosity, cracks, and slag inclusions, thus affecting the strength and stability of the connected structure.

[0005] Secondly, welding processes generate occupational hazards such as welding fumes, harmful gases, and intense arc radiation, which adversely affect the health of operators. For example, welding produces fumes containing metal particles and harmful gases such as nitrogen oxides, which can lead to occupational diseases with long-term inhalation. Additionally, welding arc light can damage the eyes and skin.

[0006] Furthermore, welding processes typically have certain requirements regarding material thickness and structural form. For thinner tubular structures, improper control of welding parameters can easily lead to problems such as burn-through and deformation, thus affecting the appearance quality and structural strength of the furniture frame. Additionally, after welding, subsequent processing steps such as grinding, polishing, surface treatment, and spraying are usually required to remove welding spatter and weld beads and improve appearance quality, further increasing processing steps and production costs.

[0007] Furthermore, welding is a permanent connection method. Once welded, it is not easy to disassemble or reassemble, which also causes some inconvenience during furniture transportation and installation.

[0008] In addition, some profiles such as aluminum alloy co-extruded tubes and wood-plastic composite co-extruded tubes are difficult to connect using conventional welding methods, which limits their application in furniture making.

[0009] Therefore, there is an urgent need in the existing technology for a furniture bracket connection structure and its installation method that can replace welding connections, is easy to assemble, has a wide range of applications, and provides reliable connections. Summary of the Invention

[0010] The purpose of this invention is to provide a connection structure and installation method for a furniture bracket, so as to solve the technical problems of furniture brackets being difficult to connect by welding, having complex structures, and having unstable connections in the prior art.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: A connecting structure for a furniture bracket includes a first connector, a second connector, a connecting seat, a movable nut, a first connecting bolt, and a second connecting bolt. Both the first connector and the second connector are hollow tubular structures; The second connector has a first mounting hole on its side wall; The connecting seat is disposed on the outside of the second connecting member. The connecting seat has a second mounting hole corresponding to the first mounting hole, and has a mounting surface for cooperating with the first connecting member and a connecting part for the second connecting bolt to connect. The movable nut is movably disposed inside the second connector and can be moved to a position corresponding to the first mounting hole; After passing through the second mounting hole and the first mounting hole, the first connecting bolt is threadedly connected to the movable nut to fix the connecting seat to the second connecting member; The first connector has a third mounting hole; The second connecting bolt passes through the third mounting hole and connects to the connecting part of the connecting seat to fix the first connecting member to the connecting seat.

[0012] Preferably, the second connector has an open end into which the movable nut is inserted, the movable nut being able to enter the interior of the second connector through the open end and move along the length of the second connector.

[0013] Preferably, the connector is a U-shaped structure, and the mounting surface is disposed on the U-shaped structure so that the end of the first connector is positioned on the mounting surface.

[0014] Preferably, the connecting part of the connecting seat is a threaded hole, and the second connecting bolt is threadedly connected to the threaded hole.

[0015] An installation method for a furniture bracket connection structure, applied to the aforementioned furniture bracket connection structure, includes the following steps: S1. A first mounting hole is formed on the side wall of the second connector, and the movable nut is inserted into the second connector from the open end of the second connector. S2. Move the movable nut to the position corresponding to the first mounting hole; S3. Place the connector on the outside of the second connector so that the second mounting hole is aligned with the first mounting hole; S4. Pass the first connecting bolt through the second mounting hole and the first mounting hole in sequence and thread it with the movable nut to fix the connecting seat on the second connecting member; S5. Position the end of the first connector on the mounting surface of the connector, so that the third mounting hole is aligned with the connecting part of the connector; S6. Pass the second connecting bolt through the third mounting hole and connect it to the connecting part to complete the connection between the first connecting member and the second connecting member.

[0016] Preferably, the second connector is made of a non-ferromagnetic material, and the movable nut is a metal part that can be attracted by a magnetic traction tool; in step S2, the movable nut is pulled by a magnetic traction tool located outside the second connector to move it to the position corresponding to the first mounting hole; the magnetic traction tool is a permanent magnet or an electromagnetic adsorption device.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention adopts a non-welding connection method using a connecting seat, a movable nut, and bolts to achieve a reliable connection between the first connecting part and the second connecting part, avoiding the high dependence of traditional welding processes on the operator's technical level.

[0018] 2. This invention eliminates the need for welding operations, thereby reducing the impact of welding fumes, harmful gases, and arc radiation on operators, which is beneficial for improving the production environment and occupational health conditions.

[0019] 3. This invention is applicable to hollow tubular connectors, especially to profiles that are inconvenient or unsuitable for welding, such as thin-walled tubes, aluminum alloy co-extruded tubes, and wood-plastic co-extruded tubes, thus expanding the applicable range of furniture support materials.

[0020] 4. By providing a movable nut inside the second connector and a corresponding mounting structure for the first connector and the connector seat, both connection strength and ease of assembly are ensured.

[0021] 5. The connector is first fixed to the second connector, and then the first connector is connected to the connector. The assembly logic is clear, which facilitates standardized assembly and mass production.

[0022] 6. The present invention adopts a bolt connection method, which has the advantages of being detachable, maintainable and easy to transport and assemble, and can effectively reduce the packaging volume and transportation cost of furniture products.

[0023] 7. When using magnetic traction to position movable nut parts, the process of aligning holes in the fasteners inside the hollow tube can be simplified, improving assembly efficiency and accuracy. Attached Figure Description

[0024] Figure 1 , 2 This is a schematic diagram of the overall structure of the furniture support connection structure of the present invention.

[0025] Figure 3 This is an exploded structural diagram of the furniture support connection structure of the present invention.

[0026] Figure 4 This is a partial cross-sectional view of the furniture support connection structure of the present invention.

[0027] Figure 5 This is a partially exploded structural diagram of the furniture support connection structure of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. First connector; 2. Second connector; 3. First mounting hole; 4. Connecting seat; 41. Mounting surface; 5. Second mounting hole; 6. Movable nut; 7. First connecting bolt; 8. Third mounting hole; 9. Second connecting bolt. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. All equivalent substitutions, improvements, and modifications made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0030] Example 1: Connection Structure like Figures 1 to 3 As shown, a connecting structure for a furniture bracket includes a first connector 1, a second connector 2, a connecting seat 4, a movable nut 6, a first connecting bolt 7, and a second connecting bolt 9.

[0031] In this embodiment, both the first connector 1 and the second connector 2 are hollow tubular structures. In this embodiment, the first connector 1 can serve as a crossbeam in the furniture support, and the second connector 2 can serve as a column in the furniture support. Of course, in other embodiments, the two can be interchanged according to the overall structural layout of the furniture, as long as the connection between the two hollow tubular components can be achieved.

[0032] The second connector 2 has a first mounting hole 3 on its side wall. A connecting seat 4 is located on the outside of the second connector 2, and has a second mounting hole 5 corresponding to the first mounting hole 3. The connecting seat 4 also has a mounting surface 41 and a connecting portion. The mounting surface 41 is used to support, position, and mount the end of the first connector 1, and the connecting portion is used for connection by the second connecting bolt 9. In this embodiment, the connecting portion is preferably a threaded hole, so that the second connecting bolt 9 can be directly screwed into the connecting seat 4 to achieve a tight connection between the first connector 1 and the connecting seat 4.

[0033] The movable nut 6 is disposed inside the second connecting member 2 and can move along the length of the second connecting member 2 to a position corresponding to the first mounting hole 3. The movable nut 6 can be a metal block with internal threads, a nut plate, or other components that can move inside the hollow tube and engage with the first connecting bolt 7. In this embodiment, the movable nut 6 is preferably a block-shaped metal part with internal threads, whose external dimensions are adapted to the internal cavity of the second connecting member 2 to ensure that it can move inside the tube without significant shaking after locking.

[0034] The second connector 2 preferably has an open end into which the movable nut 6 is inserted. This open end can be an end opening of the second connector 2, facilitating the insertion of the movable nut 6 into the second connector 2. After the movable nut 6 is inserted into the second connector 2, it can be moved to a predetermined installation position by pushing, pulling, or magnetic attraction.

[0035] After the first connecting bolt 7 passes through the second mounting hole 5 on the connecting seat 4 and the first mounting hole 3 on the second connecting member 2, it is threadedly connected to the movable nut 6 located inside the second connecting member 2. By tightening the first connecting bolt 7, the connecting seat 4 can be firmly fixed to the outside of the second connecting member 2.

[0036] The first connector 1 has a third mounting hole 8. After the end of the first connector 1 is positioned on the mounting surface 41 of the connector 4, the second connecting bolt 9 passes through the third mounting hole 8 and connects with the connecting part of the connector 4, thereby fixing the first connector 1 on the connector 4. Thus, a stable mechanical connection is formed between the first connector 1 and the second connector 2.

[0037] In this embodiment, the connecting seat 4 is preferably a U-shaped structure. This U-shaped structure facilitates a better fit with the outer side of the second connecting member 2, and also makes it easier to form a mounting surface 41 and a connecting part on it, so that the first connecting member 1 can be easily assembled onto the connecting seat 4.

[0038] Example 2: Installation Method An installation method for a furniture support connection structure, applied to the aforementioned connection structure, includes the following steps: S1. A first mounting hole 3 is formed on the side wall of the second connector 2, and the movable nut 6 is inserted into the second connector 2 from the open end of the second connector 2.

[0039] The position of the first mounting hole 3 can be predetermined according to the predetermined connection position between the first connector 1 and the second connector 2. The first mounting hole 3 can be formed by drilling, punching or machining.

[0040] S2. Move the movable nut 6 to the position corresponding to the first mounting hole 3.

[0041] In this step, the movable nut 6 moves along its length inside the second connector 2 until its internal threaded hole is substantially aligned with the first mounting hole 3. For ease of subsequent assembly, its position can be fine-tuned by trial and error.

[0042] S3. Place the connector 4 on the outside of the second connector 2 so that the second mounting hole 5 is aligned with the first mounting hole 3.

[0043] At this time, the connecting seat 4 and the second connecting member 2 are in a locked state.

[0044] S4. Pass the first connecting bolt 7 through the second mounting hole 5 and the first mounting hole 3 in sequence and thread it with the movable nut 6 to fix the connecting seat 4 on the second connecting member 2.

[0045] As the first connecting bolt 7 is gradually tightened, the connecting seat 4 is pulled towards the outer wall of the second connecting member 2, and the movable nut 6 is pulled by the first connecting bolt 7 and pressed against the inner wall of the second connecting member 2, thereby forming an inner and outer clamping structure on both sides of the tube wall of the second connecting member 2, and finally achieving a firm fixation between the connecting seat 4 and the second connecting member 2.

[0046] S5. Position the end of the first connector 1 on the mounting surface 41 of the connector 4, so that the third mounting hole 8 is aligned with the connecting part of the connector 4.

[0047] The mounting surface 41 can support and limit the first connector 1, so that the first connector 1 can maintain a relatively accurate installation posture during the assembly process.

[0048] S6. Pass the second connecting bolt 9 through the third mounting hole 8 and connect it to the connecting part to complete the connection between the first connecting piece 1 and the second connecting piece 2.

[0049] When the second connecting bolt 9 is tightened, the first connecting piece 1 is pressed and fixed on the connecting seat 4. The connecting seat 4 is then fixed on the second connecting piece 2 by the first connecting bolt 7 and the movable nut piece 6, thus forming a complete furniture bracket connection node.

[0050] Example 3: Magnetic Traction Positioning Method In a preferred embodiment, the second connector 2 is made of a non-ferromagnetic material, such as aluminum alloy, wood-plastic composite, or other non-ferromagnetic tubing. The movable nut 6 is a metal part that can be attracted by a magnetic traction tool, such as iron or a metal part with magnetic response characteristics.

[0051] In step S2 above, the movable nut 6 can be pulled by a magnetic traction tool located outside the second connector 2, causing it to move inside the second connector 2 to a position corresponding to the first mounting hole 3. The magnetic traction tool can be a permanent magnet or an electromagnetic adsorption device.

[0052] Specifically, after the movable nut 6 enters the interior of the second connector 2 through its open end, the operator can move the magnetic traction tool along the outer wall of the second connector 2. Since the second connector 2 itself is a non-ferromagnetic material, it does not significantly shield the magnetic traction process. Therefore, the external magnetic traction tool can attract the movable nut 6 inside the tube through the tube wall of the second connector 2 and drive it to move along the tube cavity. The operator can move the magnetic traction tool to the vicinity of the first mounting hole 3, so that the movable nut 6 accurately stops at the corresponding position of the first mounting hole 3, thereby facilitating the quick threaded engagement of the first connecting bolt 7 with the movable nut 6.

[0053] This method is particularly suitable for scenarios where the cavity is deep and it is difficult to directly locate the internal nut parts manually, which can effectively improve assembly efficiency and reduce assembly difficulty.

[0054] Working principle The working principle of this invention is as follows: a movable nut 6 located inside the second connector 2 is used to form a bolt clamping connection that spans the pipe wall of the second connector 2 with a connecting seat 4 located outside the second connector 2, and then an indirect fixed connection between the first connector 1 and the second connector 2 is achieved through the connecting seat 4.

[0055] Specifically, the connection relationships in this invention are divided into two levels: The first level is the fixed connection between the connector 4 and the second connector 2.

[0056] Since the second connector 2 is a hollow tubular structure, its internal space is usually difficult to directly place and fix conventional nuts. Therefore, the present invention provides a movable nut 6 inside the second connector 2. This movable nut 6 can be inserted into the interior from the open end of the second connector 2 and then moved to the corresponding position of the first mounting hole 3. When the first connecting bolt 7 passes through the second mounting hole 5 on the connecting seat 4 and the first mounting hole 3 on the second connector 2 from the outside to the inside, the first connecting bolt 7 can form a threaded connection with the movable nut 6. When the first connecting bolt 7 is tightened further, the connecting seat 4 is pulled inward to the outer wall of the second connector 2, while the movable nut 6 is pulled outward and pressed against the inner wall of the second connector 2. In this way, the tube wall of the second connector 2 is clamped between the connecting seat 4 and the movable nut 6, forming a stable clamping and locking state. Thus, the connecting seat 4 can be reliably installed on the second connector 2 without welding.

[0057] The second level is the fixed connection between the first connector 1 and the connector 4.

[0058] After the connecting seat 4 is stably fixed to the second connecting member 2, the end of the first connecting member 1 is placed and positioned on the mounting surface 41 of the connecting seat 4. The mounting surface 41 provides a support reference for the first connecting member 1, ensuring that the first connecting member 1 remains in the correct position during assembly. Subsequently, the second connecting bolt 9 passes through the third mounting hole 8 on the first connecting member 1 and connects to the connecting part on the connecting seat 4. By tightening the second connecting bolt 9, the first connecting member 1 is locked onto the connecting seat 4. Since the connecting seat 4 is fixed to the second connecting member 2, the first connecting member 1 is indirectly fixed to the second connecting member 2, thereby achieving a stable connection between the beam and the column.

[0059] From a mechanical transmission perspective, when the furniture support is under load, the load from the first connector 1 is first transmitted to the connector 4, and then from the connector 4 to the second connector 2 via the first connecting bolt 7 and the movable nut 6. The mounting surface 41 is used to bear and distribute the local load of the first connector 1, while the connector 4 serves as a transition connection and load transfer point. The locking structure formed by the first connecting bolt 7 and the movable nut 6 ensures the connection strength between the connector 4 and the second connector 2, and the second connecting bolt 9 ensures the connection stability between the first connector 1 and the connector 4. Through the above structural cooperation, the present invention can still achieve a relatively reliable connection effect without using welding technology.

[0060] Furthermore, the positioning process of the movable nut 6 is simplified when using magnetic traction positioning. The operator does not need to manually position the nut by inserting tools into the second connector 2; instead, a magnetic traction tool located outside the second connector 2 can be used to move the movable nut 6 to the predetermined position through the tube wall of the second connector 2. This method is particularly effective when the second connector 2 is long, has a small cross-section, or has limited internal space, significantly reducing assembly difficulty and improving the alignment efficiency between the movable nut 6 and the first mounting hole 3.

[0061] Therefore, the present invention solves the problem that it is inconvenient to use non-welding methods to reliably connect the nodes of hollow tubular furniture supports through the structural design of "internal movable nut parts + external connecting seats + double bolt hierarchical connection", while taking into account the ease of assembly, connection reliability and applicable material range.

Claims

1. A connecting structure for a furniture bracket, characterized in that, It includes a first connector (1), a second connector (2), a connecting seat (4), a movable nut (6), a first connecting bolt (7), and a second connecting bolt (9); Both the first connector (1) and the second connector (2) are hollow tubular structures; The second connector (2) has a first mounting hole (3) on its side wall; The connecting seat (4) is located on the outside of the second connecting member (2). The connecting seat (4) has a second mounting hole (5) corresponding to the first mounting hole (3), and has a mounting surface (41) for cooperating with the first connecting member (1) and a connecting part for the second connecting bolt (9) to connect. The movable nut (6) is movably disposed inside the second connector (2) and can be moved to a position corresponding to the first mounting hole (3); After the first connecting bolt (7) passes through the second mounting hole (5) and the first mounting hole (3), it is threadedly connected to the movable nut (6) to fix the connecting seat (4) on the second connecting member (2); The first connector (1) has a third mounting hole (8); The second connecting bolt (9) passes through the third mounting hole (8) and connects to the connecting part of the connecting seat (4) to fix the first connecting member (1) to the connecting seat (4).

2. The connecting structure of the furniture bracket according to claim 1, characterized in that: The second connector (2) has an open end into which the movable nut (6) is inserted, the movable nut (6) being able to enter the interior of the second connector (2) through the open end and move along the length of the second connector (2).

3. The connecting structure of the furniture bracket according to claim 1, characterized in that: The connecting seat (4) is a U-shaped structure, and the mounting surface (41) is disposed on the U-shaped structure so that the end of the first connecting member (1) is positioned on the mounting surface (41).

4. The connecting structure of the furniture bracket according to claim 1, characterized in that: The connecting part of the connecting seat (4) is a threaded hole, and the second connecting bolt (9) is threadedly connected to the threaded hole.

5. A method for installing a furniture support connection structure, characterized in that, The connection structure applied to the furniture bracket according to any one of claims 1-4 includes the following steps: S1. A first mounting hole (3) is formed on the side wall of the second connector (2), and the movable nut (6) is inserted into the second connector (2) through the open end of the second connector (2); S2. Move the movable nut (6) to the position corresponding to the first mounting hole (3); S3. Place the connector (4) on the outside of the second connector (2) so that the second mounting hole (5) is aligned with the first mounting hole (3); S4. Pass the first connecting bolt (7) through the second mounting hole (5) and the first mounting hole (3) in sequence and thread it with the movable nut (6) to fix the connecting seat (4) on the second connecting member (2); S5. Position the end of the first connector (1) on the mounting surface (41) of the connector (4) so ​​that the third mounting hole (8) is aligned with the connecting part of the connector (4); S6. Pass the second connecting bolt (9) through the third mounting hole (8) and connect it to the connecting part to complete the connection between the first connecting member (1) and the second connecting member (2).

6. The installation method according to claim 5, characterized in that: The second connector (2) is made of a non-ferromagnetic material, and the movable nut (6) is a metal part that can be attracted by a magnetic traction tool.

7. The installation method according to claim 1, characterized in that: In step S2, the movable nut (6) is pulled by a magnetic traction tool located outside the second connector (2) to move it to the position corresponding to the first mounting hole (3); the magnetic traction tool is a permanent magnet or an electromagnetic adsorption device.

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