A snap-fit ​​assembly and a sofa bed

Abstract

This utility model relates to a fastening assembly and a sofa bed. Existing sofa beds have complex structures. This utility model includes a hook on a first connecting part and a fastening element on a second connecting part. The hook has a downward-facing, exposed fastening groove, and the fastening element has a pin. The fastening groove fits onto the pin from top to bottom, allowing the hook and fastening element to be fastened and positioned, and limiting the horizontal displacement of the first and second connecting parts. The fastening hook and fastening element are respectively provided on the first and second connecting parts. The hook fastens downward onto the pin of the fastening element through the fastening groove, facilitating the assembly and disassembly of the first and second connecting parts, improving assembly and maintenance convenience, reducing costs, and enhancing the user experience.

Description

Technical Field

[0001] This utility model relates to the field of furniture, specifically to a fastening component and a sofa bed. Background Technology

[0002] Sofa beds can switch between sitting and reclining positions, facilitating use in various scenarios. Existing sofa beds consist of a base, a movable seat, and a backrest. The movable seat is adjustable to allow for switching between sitting and reclining positions. The movable seat's connection to the base, requiring quick assembly and disassembly, necessitates both strong connection and precise adjustment. This results in an overly complex connection structure, leading to assembly difficulties due to the inability to quickly disassemble and reassemble, requiring users to spend more time and effort on assembly. It also increases the difficulty of disassembly and maintenance, impacting the user experience and increasing production costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a snap-fit ​​assembly and a sofa bed. Hooks and snap-fit ​​components are respectively provided on the first connecting part and the second connecting part. The hooks are snapped downwards onto the pins of the snap-fit ​​components through snap grooves. This facilitates the assembly and disassembly of the first connecting part and the second connecting part, improves the convenience of assembly and maintenance, reduces costs, and enhances the user experience.

[0004] This utility model is achieved through the following method: a fastening assembly includes a hook disposed on a first connecting part and a fastening member disposed on a second connecting part. The hook has a downward-facing exposed fastening groove, and the fastening member has a pin. The fastening groove is fitted onto the pin from top to bottom, so that the hook and the fastening member are fastened and positioned, and the horizontal displacement of the first and second connecting parts is restricted. The first and second connecting parts are respectively provided with a hook and a fastening member for fastening. The hook is fastened to the pin of the fastening member from top to bottom through the fastening groove. This facilitates the assembly and disassembly of the first and second connecting parts through vertical relative displacement, improving assembly and maintenance convenience. It also reduces production costs by simplifying the structure, and provides horizontal limiting for the first and second connecting parts, improving connection and positioning reliability and enhancing the user experience.

[0005] Preferably, the groove opening is vertically oriented, and the groove cavity is inclined. The pin vertically passes through the groove opening and is embedded in the groove cavity to prevent the pin from detaching from the groove. The groove includes a vertically oriented groove opening and an inclined groove cavity. By setting a non-linear groove, the pin's positioning effect is improved, preventing the pin from vertically detaching from the groove and improving connection reliability.

[0006] Preferably, the hook is in the shape of a vertically placed plate, and the bottom edge of the hook is recessed upward to form the buckle groove, which runs through the hook along its vertical direction. The vertically placed plate shape of the hook ensures that its height meets the requirements for the buckle groove, provides good structural strength, and also facilitates insertion and fastening by reducing its thickness, thus improving assembly and disassembly efficiency.

[0007] Preferably, the fastener includes a vertically positioned connecting piece, with the pin vertically positioned on the connecting piece. The vertical projections of the connecting piece and the hook are offset but adjacent to each other, allowing the hook to be fitted onto the pin through a fastening groove. The vertical positioning of the connecting piece facilitates vertical insertion and tight fit with the hook, ensuring that the fastening groove can be precisely fitted onto the horizontally positioned pin, improving assembly accuracy and efficiency.

[0008] Preferably, one end of the pin is perpendicularly fixed to the connecting piece, and the other end has a radially raised periphery forming a limiting ring. The pin and the connecting piece are integrally formed, providing good structural strength. The pin is vertically connected to the vertically positioned connecting piece, ensuring that the pin axis remains horizontal and stably supports the hook, preventing the hook from slipping due to pin tilting. The end of the pin away from the connecting piece is provided with a limiting ring to prevent the hook from detaching from the pin, ensuring reliable fastening.

[0009] Preferably, the width of the retaining groove matches the diameter of the middle section of the pin, and the outer diameter of the limiting ring is larger than the width of the retaining groove to prevent the retaining groove from disengaging along the pin's axis. Reducing the gap between the retaining groove wall and the pin decreases the relative movement between the first and second connecting parts, thereby improving connection reliability and preventing wobbling after engagement. The outer diameter of the limiting ring is larger than the width of the retaining groove, allowing the limiting ring to abut against the lateral edge of the retaining groove and preventing the hook from disengaging from the pin.

[0010] A sofa bed includes a base forming a second connecting portion and a movable seat forming a first connecting portion. The base includes two opposing armrest portions, and the movable seat is mounted between the armrest portions and fixedly connected by a fastening assembly, allowing the movable seat to be detachably installed within the base. The detachable installation of the movable seat onto the base via the fastening assembly effectively improves the convenience of disassembly and maintenance. It allows for independent packaging and transportation of the base and movable seat through disassembly, and also ensures that the movable seat can be precisely installed between the armrest portions to meet usage requirements.

[0011] Preferably, the fastening components are in two sets and are respectively placed between the rear edges of the movable seat and the corresponding armrests. The two sets of fastening components are set separately, which not only increases the connection strength by increasing the number of fastening components and ensuring a firm connection between the base and the movable seat, but also simplifies the structure by limiting the number of fastening components, facilitates synchronous fastening, improves assembly efficiency, and reduces component costs.

[0012] Preferably, the armrests are provided with slide rails on their opposing surfaces, and the fasteners can slide along the slide rails to allow the movable seat to reciprocate along the channel between the armrests. The fasteners can slide along the slide rails and guide the movable seat relative to the base, allowing the sofa bed to switch between sitting and reclining positions to meet user needs.

[0013] Preferably, the bottom of the front edge of the movable seat is provided with rollers, which overlap the ground so that the top surface of the seat cushion forms an upward supporting surface. The rollers are used to support the front of the movable seat and also reduce friction with the ground when the movable seat moves, making it convenient for the sofa bed to switch between sitting and lying positions.

[0014] Preferably, the base includes a backrest positioned between the rear edges of the armrests, with the front wall of the backrest forming a support surface. The backrest provides a soft support for the user, enhancing comfort. The two sides of the backrest connect to the corresponding armrests, ensuring that the backrest can withstand the force exerted by the user when leaning against it.

[0015] The beneficial effects of this utility model are as follows: hooks and fasteners are respectively provided on the first connecting part and the second connecting part. The hooks are fastened to the pins of the fasteners from top to bottom through the fastening grooves. This not only facilitates the assembly and disassembly of the first connecting part and the second connecting part by vertical relative displacement, improving the convenience of assembly and maintenance, but also reduces production costs by simplifying the structure. In addition, it can also play a role in horizontal limiting of the first connecting part and the second connecting part, improving the reliability of connection positioning and enhancing the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the fastening assembly described in Embodiment 1;

[0017] Figure 2 This is a schematic diagram of the hook structure described in Embodiment 1;

[0018] Figure 3 This is a schematic diagram of the fastener structure described in Embodiment 1;

[0019] Figure 4 This is a partial structural diagram of the sofa bed described in Embodiment 2;

[0020] Figure 5 This is a schematic diagram of the structure of the movable seat described in Embodiment 2;

[0021] In the diagram: 1. Hook, 2. Fastener, 3. Fastener groove, 4. Pin, 5. Connecting piece, 6. Limiting ring, 7. Movable seat, 8. Handrail, 9. Slide rail, 10. Roller. Detailed Implementation

[0022] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1:

[0024] This embodiment provides a fastening assembly.

[0025] like Figure 1 The fastening assembly shown includes a hook 1 on a first connecting part and a fastening member 2 on a second connecting part. The hook 1 has a downward-facing exposed fastening groove 3, and the fastening member 2 has a pin 4. The fastening groove 3 is fitted onto the pin 4 from top to bottom, so that the hook 1 and the fastening member 2 are fastened and positioned, and the horizontal displacement of the first and second connecting parts is restricted. The first and second connecting parts are respectively provided with a hook 1 and a fastening member 2 for fastening. The hook 1 is fastened to the pin 4 of the fastening member 2 from top to bottom through the fastening groove 3. This facilitates the assembly and disassembly of the first and second connecting parts through vertical relative displacement, improving assembly and maintenance convenience. It also reduces production costs by simplifying the structure, and provides horizontal limiting for the first and second connecting parts, improving connection positioning reliability and enhancing the user experience.

[0026] During installation, the first connecting part moves from top to bottom and is fitted onto the pin 4 of the fastener 2 through the buckle groove 3 on the hook 1. The pin 4 passes upward through the groove section and is embedded in the groove cavity section. After installation, the surface of the pin 4 abuts against the groove wall of the buckle groove 3, which plays a role in horizontal positioning of the first connecting part and the second connecting part. The first connecting part uses its own weight to drive the buckle groove 3 to fit onto the pin 4, effectively preventing the buckle groove 3 from vertically detaching from the pin 4 due to upward lifting.

[0027] In this embodiment, the groove opening of the buckle 3 is vertically oriented, and the groove cavity of the buckle 3 is inclined (e.g., Figure 2 As shown, the pin 4 vertically passes through the slot section and is embedded in the cavity section to prevent the pin 4 from dislodging from the groove 3. The cavity section is inclined, with its bottom end positioned rearward and communicating with the slot section, and its top end positioned forward. This effectively prevents the pin 4 from vertically dislodging from the groove and also effectively resists the rearward force of the first connecting part, ensuring that the pin 4 is embedded in the top end of the cavity section, thus improving the anti-dislodgement performance.

[0028] In this embodiment, the hook 1 is a vertically oriented sheet, and the bottom edge of the hook 1 is recessed upward to form the buckle groove 3, which extends through the hook 1 in the vertical direction. The fastening member 2 includes a vertically oriented connecting piece 5, and the pin 4 is vertically disposed on the connecting piece 5. The vertical projections of the connecting piece 5 and the hook 1 are offset and adjacent to each other, so that the hook 1 is fitted onto the pin 4 through the buckle groove 3. Both the hook 1 and the connecting piece 5 are sheet-shaped and vertically oriented in the front-to-back direction. By reducing the thickness of the hook 1, it is easier to fasten with the pin 4, effectively reducing the length of the pin 4. By reducing the thickness of the connecting piece 5, the gap between the side wall of the movable seat 7 and the side wall of the armrest 8 is reduced, thereby utilizing the armrest 8 to clamp and position the movable seat 7.

[0029] In this embodiment, one end of the pin 4 is perpendicularly fixed to the connecting piece 5, and the other end has a radially raised periphery forming a limiting ring 6 (e.g., Figure 3 (As shown). The axis of the pin 4 is perpendicular to the connecting piece 5, which ensures that the connecting piece 5 remains in a vertical position, thereby reducing the gap between the side wall of the movable seat 7 and the side wall of the armrest 8. It also ensures that the axis of the pin 4 is set horizontally, preventing the hook 1 from sliding along the surface of the pin 4 and improving the positioning reliability of the hook 1.

[0030] In this embodiment, the width of the latching groove 3 matches the diameter of the middle section of the pin 4, and the outer diameter of the limiting ring 6 is greater than the width of the latching groove 3 to prevent the latching groove 3 from disengaging along the axis of the pin 4. The hook 1 can slide between the limiting ring 6 and the connecting piece 5. Preferably, the length of the pin 4 is appropriately greater than the thickness of the hook 1, which ensures that the hook 1 can be smoothly fastened to the pin 4, and also improves the positioning reliability by reducing the length difference between the two, thereby reducing the sliding range of the hook 1 on the pin 4.

[0031] Example 2:

[0032] Compared to Embodiment 1, this embodiment provides a sofa bed.

[0033] like Figure 4 The sofa bed shown includes a base forming the second connecting portion and a movable seat 7 forming the first connecting portion. The base includes two opposing armrest portions 8, and the movable seat 7 is installed between the armrest portions 8 and fixedly connected by the fastening assembly, so that the movable seat 7 is detachably installed in the base. The detachable installation of the movable seat 7 on the base facilitates independent processing and assembly of the base and the movable seat 7, improving production convenience and efficiency. Furthermore, it allows for independent packaging and transportation of the base and the movable seat 7 by disassembling them, improving transportation convenience by reducing the volume of each package.

[0034] In this embodiment, the width of the movable seat 7 corresponds to the distance between the armrests 8, allowing the movable seat 7 to be inserted into the armrests 8 and assembled to form the sofa bed. Specifically, the fastening assembly consists of two sets, positioned between the rear edges of the movable seat 7 and the corresponding armrests 8. This ensures a secure connection between the movable seat 7 and the base, guaranteeing that the rear edge of the movable seat 7 is always close to and in contact with the rear edge of the base, preventing the movable seat 7 from shifting or deviating. It also facilitates disassembly and assembly, allowing for manual assembly by the user.

[0035] In this embodiment, a slide rail 9 is provided on the facing surface of the armrest 8, and the fastener 2 can slide along the slide rail 9 so that the movable seat 7 can reciprocate along the channel between the armrests 8. There are two slide rails 9, which are respectively provided on the corresponding side walls of the armrest 8. The fastener 2 is slidably installed on the slide rail 9 so that the fastening assembly can move along the slide rail 9 and guide the movable seat 7 to move back and forth, ensuring that the sofa bed can freely switch between a sitting position where the seat 7 moves backward and a reclining position where the movable seat 7 moves forward.

[0036] In this embodiment, the bottom of the front edge of the movable seat 7 is provided with a roller 10 (e.g., Figure 5 As shown, a seat cushion is provided on top, and rollers 10 rest on the ground so that the top surface of the seat cushion forms an upward supporting surface. The rollers 10 are located below the front edge of the movable seat 7, supporting the front edge of the movable seat 7. The rear edge of the movable seat 7 is mounted on the slide rail 9 via a fastening assembly, supporting the rear edge of the movable seat 7. This ensures that the movable seat 7 always maintains a horizontal posture, and the seat cushion on top of the movable seat 7 provides stable and comfortable support for the user.

[0037] In this embodiment, the base includes a backrest disposed between the rear edges of the armrest portion 8, with the front wall of the backrest forming a support surface. The two sides of the backrest are respectively connected to the rear edge of the armrest portion 8, allowing the user to lean against the support surface for support. During use, as the movable seat 7 moves forward, a large gap is created between the rear edge of the movable seat 7 and the backrest. This gap can be sealed by placing a filling bag, ensuring that the filling bag is flush with the top surface of the movable seat 7 and forms a flat support surface.

[0038] In this embodiment, the movable seat 7 is provided with a forward-movable extension, and the extension is provided with a liftable pillow. When the extension moves forward to the front of the movable seat 7, the pillow can be lifted by the support mechanism and smoothly connected to the top surface of the movable seat 7, and combined with the top surface of the filling bag to form a support surface for the user to lie on.

[0039] The other structures and effects of the fastening assembly described in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Claims

1. A snap-on assembly comprising a hook (1) arranged on a first connection part and a snap-on part (2) arranged on a second connection part, characterized in that The hook (1) has a downward-facing exposed buckle groove (3), and the fastener (2) has a pin (4). The buckle groove (3) is fitted onto the pin (4) from top to bottom so that the hook (1) and the fastener (2) are fastened and positioned and the horizontal displacement of the first connecting part and the second connecting part is restricted.

2. A snap-fit assembly according to claim 1, wherein The groove opening of the buckle (3) is vertical, and the cavity section of the buckle (3) is inclined. The pin (4) passes vertically through the groove opening and is embedded in the cavity section to prevent the pin (4) from leaving the buckle (3).

3. A clasp assembly according to claim 1, wherein The hook (1) is in the shape of a vertical plate, and the bottom edge of the hook (1) is recessed upward to form the buckle groove (3), which is provided through the hook (1) in the vertical direction.

4. A fastening assembly according to any one of claims 1-3, characterized in that, The fastener (2) includes a vertical connecting piece (5), and the pin (4) is vertically arranged on the connecting piece (5). The vertical projections of the connecting piece (5) and the hook (1) are misaligned and arranged adjacent to each other, so that the hook (1) is fitted onto the pin (4) through the fastening groove (3).

5. A fastening assembly according to claim 4, characterized in that, One end of the pin (4) is perpendicularly fixed to the connecting piece (5), and the other end has a radial bulge forming a limiting ring (6).

6. A fastening assembly according to claim 5, characterized in that, The width of the buckle groove (3) matches the diameter of the middle section of the pin (4), and the outer diameter of the limiting ring (6) is greater than the width of the buckle groove (3) to restrict the buckle groove (3) from disengaging along the axis of the pin (4).

7. A sofa bed, comprising a base forming a second connecting portion and a movable seat (7) forming a first connecting portion, the base comprising two opposing armrest portions (8), characterized in that, The movable seat (7) is installed between the armrest portions (8) and fixed by the fastening assembly according to any one of claims 1-6, so that the movable seat (7) is detachably installed in the base.

8. A sofa bed according to claim 7, characterized in that, The fastening components are in two sets and are respectively placed between the rear ends of the movable seat (7) and the corresponding armrest (8).

9. A sofa bed according to claim 8, characterized in that, The armrest (8) has a slide rail (9) on its facing surface. The fastener (2) can slide along the slide rail (9) so that the movable seat (7) can move back and forth along the channel between the armrests (8).

10. A sofa bed according to claim 9, characterized in that, The movable seat (7) has a roller (10) at the bottom of its front edge. The roller (10) overlaps the ground so that the top surface of the seat cushion forms an upward supporting surface; or, the base includes a backrest between the rear edges of the armrest (8), and the front wall of the backrest forms a backing surface.

Images