A lock catch assembly for a sofa

Abstract

The utility model discloses a lock catch subassembly for sofa, including first connecting body, second connecting body, first connecting body and second connecting body are fixedly matched with a sofa frame respectively, first connecting body includes box body, spacing clamping subassembly, spacing clamping subassembly sets up at the front side of box body, the left and right sides of the bottom of box body is equipped with the protruding portion respectively, second connecting body includes bottom plate, the left and right sides of the top of bottom plate are equipped with the side plate symmetry, the side plate is L type, the side plate and bottom plate form the slide groove between, the slide groove and protruding portion sliding fit, spacing clamping subassembly includes two left and right symmetrical and can synchronous approach or away spacing clamping block, and the spring is equipped between two spacing clamping blocks, be equipped with the limiting slot on the side plate, when spacing clamping block inserts limiting slot makes first connecting body, second connecting body complete quick insertion and allocation, has greatly promoted the efficiency of assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, specifically to a sofa locking assembly. Background Technology

[0002] With rising living standards and changing living environments, modular, freely combinable sofas are becoming increasingly popular. These sofas are typically assembled from two or more independent sofa unit frames to meet users' needs for different layouts, sizes, and functions. Therefore, the locking assembly connecting the two sofa unit frames becomes a key component, its performance directly affecting the sofa's overall stability, ease of installation, and user experience.

[0003] Currently, the common methods for connecting sofa frame units are to use simple connectors with screws for fixing, or to use pre-installed hooks and loops on the frame for connection. However, using screws for fixing is cumbersome, requires special tools, and is inefficient to disassemble and assemble. Furthermore, after repeated disassembly and assembly, the screws are prone to stripping and loosening, affecting the connection strength. While hooks and loops simplify the operation, they typically have drawbacks such as large gaps between the parts, unstable connections, and a tendency to produce abnormal noises. Especially after long-term use and under stress, hooks are prone to detachment or deformation, posing safety hazards.

[0004] Therefore, there is an urgent need in the existing technology for a sofa unit frame connection locking assembly that can achieve a fast and secure connection, while also being easy to operate, tool-free, and having high connection accuracy and reliability. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model relates to a locking assembly for sofas. This assembly has a simple and reliable structure, effectively solves the aforementioned technical problems, and is suitable for widespread use. To achieve the above objectives, this utility model is implemented through the following technical solution: A sofa locking assembly includes a first connector and a second connector, which are respectively fixedly engaged with a sofa frame. The first connector includes a housing and a limiting and locking assembly, which is disposed on the front side of the housing. The bottom left and right sides of the housing have protrusions. The second connector includes a base plate, and the upper left and right sides of the base plate are symmetrically provided with side plates. The side plates are L-shaped and form a sliding groove between the side plates and the base plate. The sliding groove is slidably engaged with the protrusions. The limiting and locking assembly includes two left and right symmetrical limiting blocks that can move closer or further apart simultaneously. A spring is provided between the two limiting blocks. The side plates have limiting grooves. When the limiting blocks are inserted into the limiting grooves, the first connector and the second connector are quickly mated.

[0006] Based on the above scheme and as a preferred embodiment: the front side of the box body is provided with a detachable support plate, the limiting block is attached to the support plate, the support plate is provided with a first baffle on the upper and lower sides of the limiting block, the upper and lower sides of the limiting block are also provided with a protrusion, the front side of the box body is also provided with an integrally formed top plate, the limiting block is located between the support plate and the top plate to form a sliding fit, the front side of the top plate is provided with a second baffle, and the protrusion is located between the first baffle and the second baffle.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the limiting clamping assembly further includes an adjusting block, the support plate is provided with a movable adjusting groove, one end of the adjusting block passes through the movable adjusting groove and is fixedly connected to the limiting clamping block, and the end of the adjusting block away from the support plate bends and extends outward.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the end of the limiting block is provided with an arc-shaped guide surface.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: a support seat is further provided in the middle of the support plate, and the support seat is provided with an arc-shaped groove adapted to the properties of the spring.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the box body has two insertion holes on the side face near the second connector, the bottom plate of the second connector has a support block, and the support block has two positioning pins on the side face near the first connector that are positioned and engaged with the insertion holes.

[0011] The outstanding and beneficial technical effects of this utility model compared with the prior art are as follows: through the sliding cooperation between the protrusion of the first connector and the groove of the second connector, precise guidance and preliminary positioning are achieved before connection. Subsequently, the spring-driven limit block automatically engages with the limit groove to complete the final locking. The entire connection process does not require any tools, which greatly improves the efficiency of assembly and disassembly. By moving the two adjusting blocks, the spring force can be overcome, and the two limit blocks can be driven to simultaneously disengage from the limit groove, achieving fast and labor-saving unlocking. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the quick-connect lock; Figure 2 This is a schematic diagram of the limit clamping component; Figure 3 This is a schematic diagram of the box. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The directions or positional relationships shown are for the purpose of describing this utility model only, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0016] To solve the above technical problems, such as Figure 1-3 As shown, this utility model designs a sofa locking assembly, including a first connecting body 1 and a second connecting body 2. The first connecting body 1 and the second connecting body 2 are respectively fixedly engaged with a sofa frame (not shown in the figure). The first connecting body 1 includes a box body 11 and a limiting and locking assembly. The limiting and locking assembly is located on the front side of the box body 11. The bottom left and right sides of the box body 11 are respectively provided with protrusions 12. The second connecting body 2 includes a base plate 21. The upper left and right sides of the base plate 21 are symmetrically provided with side plates 22. The side plates 22 are L-shaped, and a sliding groove 23 is formed between the side plates 22 and the base plate 21. The sliding groove 23 and the protrusion 12 are slidably engaged. The protrusion 12 at the bottom of the first connecting body 1 engages with the sliding groove 23 on the second connecting body 2, precisely aligning and initially joining the two connecting bodies. The sliding groove 23 has a built-in guiding function, reducing the precision requirements during docking and providing good fault tolerance. The limiting and locking assembly includes two symmetrical limiting blocks 13 that can move closer or further apart synchronously. A spring 14 is provided between the two limiting blocks 13. The side plate 22 has a limiting groove 24. When the limiting blocks 13 are inserted into the limiting groove 24, the first connecting body 1 and the second connecting body 2 complete a rapid mating. When the connecting bodies are pushed into place, under the action of the spring 14, the two limiting blocks 13 automatically and synchronously pop outwards and lock into the limiting groove 24 of the side plate 22. This action forms a rigid lock, preventing the connection from being pulled apart or loosened.

[0017] In a further preferred embodiment, the front side of the box body 11 is provided with a detachable support plate 15. The support plate 15 is bolted to the box body 11. The limiting block 13 fits against the support plate 15. The support plate 15 is provided with a first baffle 16 on the upper and lower sides of the limiting block 13. The upper and lower sides of the limiting block 13 are also provided with a protrusion 17. The front side of the box body 11 is also provided with an integrally formed top plate 18. The limiting block 13 is located between the support plate 15 and the top plate 18 to form a... The sliding fit provides support on two planes for its movement, effectively preventing the block from tilting or warping during sliding and ensuring that it can only perform the designed horizontal linear movement. The front side of the top plate 18 is provided with a second baffle 19, and the protrusion 17 is located between the first baffle 16 and the second baffle 19. The first baffle 16 and the second baffle 19 work together to restrict the protrusion 17 on the limiting block 13 within the channel they form. The design of the detachable support plate 15 makes this precision sliding pair an independent maintainable module.

[0018] In this embodiment, it is further preferred that the limiting and locking assembly also includes an adjusting block 110. The support plate 15 is provided with a movable adjusting groove. One end of the adjusting block 110 passes through the movable adjusting groove and is fixedly connected to the limiting block 13. The end of the adjusting block 110 away from the support plate 15 bends and extends outward. As an externally visible operating component, the adjusting block 110 provides the user with an intuitive and specific force point, transforming the unlocking action of the internal locking block into a clear and convenient external manual operation, realizing a tool-free unlocking method. The outward bending and extension design of the end of the adjusting block 110 conforms to the principles of ergonomics. It not only increases the contact area and comfort of the operating part, but its lever structure also plays an effective role in increasing force and saving effort, making one-handed operation easy and effortless.

[0019] In this embodiment, it is further preferred that the end of the limiting block 13 is provided with an arc-shaped guide surface 111. The arc-shaped guide surface 111 can guide the limiting block 13 to be pressed when it contacts the side plate 22. When the arc-shaped guide surface 111 of the limiting block 13 contacts the side plate 22 of the second connector 2, the horizontal pushing force is converted into a normal force perpendicular to this contact surface. The component of this normal force acts directly on the block itself, causing it to overcome the resistance of the spring 14 and produce a smooth and controllable radial contraction. This process transforms the possible rigid collision into a smooth transition movement, significantly reducing the operating force and impact wear during the insertion process. In this embodiment, it is further preferred that the support plate 15 is provided with a support seat 112 in the middle. The support seat 112 is provided with an arc-shaped groove adapted to the properties of the spring 14. The arc-shaped groove on the support seat 112 provides geometric conformal constraints for the end of the spring 14, ensuring that the spring 14 does not undergo radial movement or buckling during repeated compression and release, thereby ensuring that its force is always transmitted along the design axis.

[0020] In this embodiment, it is further preferred that the box body 11 has two insertion holes 3 on one end face near the second connector 2, and a support block 4 is provided on the bottom plate 21 of the second connector 2. The support block 4 has two positioning pins 5 on one end face near the first connector 1 that are positioned and cooperate with the insertion holes 3. On the basis of the main slide groove 23 completing the initial guidance and the limiting block 13 achieving the main locking, the positioning pins 5 and the insertion holes 3 constitute a precise secondary positioning system, which improves the connection rigidity and positional accuracy.

[0021] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made by those skilled in the art based on the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A locking assembly for a sofa, characterized in that: The device includes a first connector and a second connector, which are respectively fixedly engaged with a sofa frame. The first connector includes a box and a limiting and clamping assembly. The limiting and clamping assembly is located on the front side of the box. The bottom left and right sides of the box have protrusions. The second connector includes a base plate. The upper left and right sides of the base plate have symmetrically arranged side plates. The side plates are L-shaped and form a sliding groove between the side plates and the base plate. The sliding groove and the protrusions are slidably engaged. The limiting and clamping assembly includes two left and right symmetrical limiting blocks that can move closer or further away simultaneously. A spring is provided between the two limiting blocks. The side plates have limiting grooves. When the limiting blocks are inserted into the limiting grooves, the first connector and the second connector can be quickly mated.

2. A sofa latch assembly according to claim 1, characterized in that: The front side of the box body is provided with a detachable support plate. The limiting block is attached to the support plate. The support plate is provided with a first baffle on the upper and lower sides of the limiting block. The upper and lower sides of the limiting block are also provided with a protrusion. The front side of the box body is also provided with an integrally formed top plate. The limiting block is located between the support plate and the top plate to form a sliding fit. The front side of the top plate is provided with a second baffle. The protrusion is located between the first baffle and the second baffle.

3. A sofa latch assembly according to claim 2, characterized in that: The limiting and clamping assembly also includes an adjusting block. The support plate is provided with a movable adjusting groove. One end of the adjusting block passes through the movable adjusting groove and is fixedly connected to the limiting block. The end of the adjusting block away from the support plate bends and extends outward.

4. A sofa latch assembly according to claim 3, characterized in that: The end of the limiting block is provided with an arc-shaped guide surface.

5. A sofa latch assembly according to claim 4, characterized in that: The support plate is further provided with a support seat in the middle, and the support seat is provided with an arc-shaped groove adapted to the properties of the spring.

6. A sofa latch assembly according to claim 1, characterized in that: The box body has two insertion holes on one end face near the second connector. The bottom plate of the second connector has a support block. The support block has two positioning pins on one end face near the first connector that are positioned and engaged with the insertion holes.

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