Serpentine spring fixing buckle and furniture frame structure matched with serpentine spring fixing buckle

Abstract

The utility model relates to the technical field of furniture accessories, in particular to a serpentine spring fixing buckle which comprises a T-shaped fixing part and an inserting part which are integrally formed, and a transverse limiting structure is formed at the intersection of the fixing part and the inserting part. One end, close to the fixing part, of the inserting part is a connecting end, the other end of the inserting part is an inserting end, symmetrically-distributed grooves are formed in the two sides, located at the connecting end, of the inserting part, and the grooves axially extend in the length direction of the inserting part; a hanging buckle hole penetrating through the thickness of the inserting part is formed in the inserting end of the inserting part and used for hanging a serpentine spring, and the hanging buckle hole and the groove are formed in the axis of the inserting part side by side. According to the utility model, stable fixation and convenient disassembly and assembly are realized through the T-shaped fixing part and the inserting part which are integrally formed; and the hanging buckle hole is formed to be buckled with the serpentine spring, so that the serpentine spring can be quickly assembled and disassembled without a tool, the maintenance and replacement efficiency is greatly improved, and the labor and time cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of furniture accessories technology, and in particular to a serpentine spring fixing buckle and its matching furniture frame structure. Background Technology

[0002] In the furniture manufacturing industry, such as the production of sofas and chairs, serpentine springs are often used to provide elastic support. The two ends of the serpentine spring are fixed to the furniture frame by fasteners, so that the entire working surface of the serpentine spring is a flat plane when it is in a free state. With the addition of soft padding and other accessories, the comfort of sitting is greatly improved.

[0003] The commonly used fixing clips (as per the instruction manual) Figure 1 As shown, the frame 7 includes a fixing part 1 and a connecting part 2. The fixing part 1 has a hook hole 4 for cooperating with the serpentine spring, and multiple limiting protrusions 10 are evenly arranged on the surface of the connecting part 2. After the hook hole 4 is connected to both ends of the serpentine spring, it is inserted into the connecting groove 71 of the frame 7 through the connecting part 2, and fixed to the frame 7 with a nail gun or bolts using a special nail gun. However, this fixing method has obvious defects: on the one hand, the nail gun fixing method is easy to cause the plastic surface of the connection part to become brittle or crack, and it is only suitable for wooden frames, with a small scope of application; on the other hand, due to the repeated force and release of the serpentine spring during use, the two ends of the serpentine spring are constantly slightly twisted, which can easily cause the fixed nail to loosen and come off, and the above actions can also easily cause the spring end to come off the fixing buckle, causing damage to the furniture; in addition, when it is necessary to disassemble, maintain or replace the serpentine spring, tools are required to unscrew the nail or bolt, which is not only cumbersome to operate, but also inconvenient to disassemble.

[0004] Therefore, a new serpentine spring retainer is urgently needed to solve the above problems. Utility Model Content

[0005] In order to address the technical defects mentioned in the background art, the purpose of this utility model is to provide a serpentine spring fixing buckle and its matching furniture frame structure, aiming to solve the problems of easy loosening, inconvenient disassembly, and limited elastic deformation of existing serpentine spring fixing methods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sofa serpentine spring fixing structure includes a T-shaped integrally formed fixing part and a plug-in part, wherein the intersection of the fixing part and the plug-in part forms a lateral limiting structure; one end of the plug-in part near the fixing part is a connecting end, and the other end is an insertion end; the plug-in part has symmetrically distributed grooves on both sides of the connecting end, and the grooves extend axially along the length direction of the plug-in part; the plug-in part has a hook hole penetrating its thickness on the insertion end, the hook hole is used to hook the serpentine spring, and the hook hole and the groove are arranged side by side on the axis of the plug-in part.

[0008] Preferably, the plug portion is provided with guide slopes on both sides of the insertion end, and the inclination direction of the guide slopes is inclined downward from the hook hole towards the insertion end.

[0009] Preferably, the insertion end of the plug is configured as a rounded transition surface, and the two ends of the rounded transition surface are smoothly connected to the upper and lower surfaces of the plug.

[0010] Preferably, the groove extends axially along the insertion part for half the total length of the insertion part, and the bottom surface of the groove is a planar structure, with a groove depth of 3-5 mm.

[0011] Preferably, the hook hole has a U-shaped opening structure, the opening width of which is 2-4 mm greater than the diameter of the serpentine spring wire, and the bottom of the hook hole is rounded.

[0012] Preferably, the fixing part has chamfers on both sides, and the radius of curvature R of the chamfers is 1-3mm.

[0013] A furniture frame structure includes the serpentine spring fixing buckle, the frame is provided with a circumferential insertion groove that mates with the insertion part, and the bottom of the insertion groove is provided with an anti-detachment protrusion.

[0014] Preferably, the inner wall of the insertion groove is provided with a limiting rib corresponding to the groove. The limiting rib is used to cooperate with the groove to realize the axial limiting of the insertion part, and the height of the limiting rib is 1.5-2.5mm.

[0015] In summary, the beneficial effects of this utility model are as follows:

[0016] This utility model's serpentine spring fixing buckle abandons the traditional method of using a nail gun to drive screws. It achieves stable fixing and convenient assembly / disassembly through a T-shaped, one-piece molded fixing part and insertion part. Furthermore, by setting hook holes to connect with the serpentine spring, the installation and removal of the serpentine spring can be completed quickly without tools, greatly improving maintenance and replacement efficiency and saving labor and time costs. At the same time, through the optimized design of the serpentine spring connection structure, the serpentine spring can generate greater deformation under pressure, better exerting its elastic performance, thereby providing users with a more comfortable experience and enhancing product quality and market competitiveness. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a traditional fastener;

[0018] Figure 2 This is a schematic diagram of the serpentine spring fixing buckle of this utility model;

[0019] Figure 3 This is a front view of the serpentine spring fixing buckle of this utility model;

[0020] Figure 4 This is a cross-sectional view of the serpentine spring fixing buckle of this utility model;

[0021] Figure 5 This is a structural schematic diagram of the furniture frame of this utility model;

[0022] Figure 6 This is a sectional view of the furniture frame of this utility model;

[0023] Figure 7 yes Figure 6 Enlarged view of the serpentine spring fixing buckle structure at point a.

[0024] Explanation of the reference numerals in the figure:

[0025] 1. Fixing part; 2. Insertion part; 3. Groove; 4. Hook hole; 5. Guide slope; 6. Arc transition surface; 7. Frame; 71. Insertion groove; 8. Anti-detachment protrusion; 9. Limiting rib; 10. Limiting protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0027] Those skilled in the art should understand that, in the disclosure of this utility model, 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 orientation or positional relationship shown in the accompanying 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, the above terms should not be construed as limitations on this utility model.

[0028] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0029] The following is in conjunction with the appendix Figure 1-7 The present invention provides a more detailed description of an embodiment of a serpentine spring fixing buckle and its matching furniture frame structure.

[0030] Example 1

[0031] A type of serpentine spring retaining buckle, such as Figures 2 to 4 As shown, it includes a T-shaped integrally formed fixing part 1 and a plug-in part 2. The intersection of the fixing part 1 and the plug-in part 2 forms a lateral limiting structure. One end of the plug-in part 2 near the fixing part 1 is the connecting end, and the other end is the insertion end. The plug-in part 2 has symmetrically distributed grooves 3 on both sides of the connecting end. The grooves 3 extend axially along the length direction of the plug-in part 2. The plug-in part 2 has a hook hole 4 that penetrates its thickness on the insertion end. The hook hole 4 is used to hook a serpentine spring, and the hook hole 4 and the groove 3 are arranged side by side on the axis of the plug-in part 2.

[0032] Specifically, the serpentine spring fixing buckle is made of high-strength nylon injection molding. The plug part 2 is directly inserted into the corresponding plug slot 71 on the frame 7, allowing the serpentine spring to be directly hooked into the buckle hole 4 and fixed to the frame 7 using the fixing part 1, achieving fixation without tools. The lateral limiting structure at the intersection of the fixing part 1 and the plug part 2 engages with the edge of the plug slot 71 opening on the frame 7, effectively limiting the lateral displacement of the plug part 2 and preventing the serpentine spring from loosening due to horizontal forces under repeated stress. Through the overall mating structure of the fixing part 1 and the plug part 2, the convenience of quick assembly and disassembly is maintained, while the synergistic effect of multiple limiting mechanisms and elastic deformation achieves torsional strength comparable to traditional screw fixing, effectively solving the problem of easy loosening with traditional screw fixing. Furthermore, the optimized deformation space improves user comfort, while also considering installation efficiency and long-term reliability.

[0033] It is worth noting that this serpentine spring fixing buckle can be used not only on steel pipes, stainless steel pipes, aluminum pipes or wooden frames, but also can be installed without the need for auxiliary installation tools. This effectively avoids the problem of screw fixing damaging the product structure, while providing a durable and stable installation foundation for the elastic support of the serpentine spring.

[0034] In this embodiment, as Figure 4As shown, the plug-in part 2 is provided with guide slopes 5 on both sides of the insertion end. The guide slopes 5 are inclined downward from the hook hole 4 towards the insertion end.

[0035] Specifically, during the installation of the serpentine spring retainer, the inclined design of the guide slope 5 provides natural guidance for the engagement of the insertion part 2 and the insertion slot 71 of the frame 7. When the insertion end of the insertion part 2 contacts the edge of the insertion slot 71 of the frame 7, the guide slopes 5 on both sides slide against the edge of the slot 71 through their downward angle, allowing the insertion part 2 to gradually adjust to align with the axis of the slot 71 during the insertion process, effectively avoiding jamming or misalignment caused by initial angle deviation. This guiding effect not only reduces the difficulty of installation but also disperses the local force on the insertion part 2 through the fit between the slope and the slot 71, reducing frictional damage to the surface of the frame 7 or retainer during installation.

[0036] In this embodiment, as Figure 3 As shown, the insertion end of the plug part 2 is set as an arc transition surface 6, and the two ends of the arc transition surface 6 are smoothly connected to the upper and lower surfaces of the plug part 2, respectively.

[0037] Specifically, the arc transition surface 6 at the insertion end of the plug part 2 provides dual protection for alignment guidance during installation and stress optimization during long-term use. When the plug part 2 is pushed into the plug slot 71 of the frame 7, the smooth curve of the arc transition surface 6 can preferentially contact the edge of the slot. By gradually adjusting the entry angle of the plug part 2, it avoids the instantaneous increase in resistance or local wear caused by excessively sharp edges at the insertion end, thereby making the fit between the fixing buckle and the plug slot 71 more natural and smooth.

[0038] In this embodiment, as Figure 4 As shown, the length of the groove 3 extending along the axial direction of the insertion part 2 is half the total length of the insertion part 2, and the bottom surface of the groove 3 is a planar structure, with a depth of 3-5mm.

[0039] Specifically, the depth of the groove 3 is preferably 4mm, and the axial extension length of the groove 3 and its planar structural design provide a precise mechanical limiting basis for the fit between the insertion part 2 and the insertion slot 71 of the frame 7. The flat bottom surface of the groove 3 allows the limiting rib 9 to fit tightly against the inner wall of the groove 3. Even during frequent reciprocating motion of the spring, stable axial constraint can be maintained through planar contact, preventing longitudinal displacement of the insertion part 2 within the insertion slot 71. At the same time, the extension length of the groove 3 matches the insertion stroke of the insertion part 2. During installation, progressive positioning is achieved through the gradual contact between the groove 3 and the limiting rib 9, ensuring smooth installation and providing structural protection for the long-term fatigue resistance of the fixing buckle.

[0040] In this embodiment, the hook hole 4 has a U-shaped opening structure, the opening width of which is 2-4 mm larger than the diameter of the serpentine spring wire, and the bottom of the hook hole 4 is rounded.

[0041] Specifically, the hook hole 4 adopts a U-shaped opening design, and the end of the serpentine spring can be directly embedded in the hook hole 4. Its opening width is slightly larger than the spring wire diameter, which can ensure the stability of the hook and allow the spring to produce moderate displacement when compressed, thereby increasing the overall deformation and improving the buffering effect of the elastic support.

[0042] In this embodiment, as Figure 2 , 3 As shown, the fixing part 1 has chamfers on both sides, and the radius of curvature R of the chamfers is 1-3mm.

[0043] Example 2

[0044] A furniture frame structure, such as Figure 6 , 7 As shown, it includes a serpentine spring retainer, and the frame 7 is provided with a circumferential insertion groove 71 that matches the insertion part 2. The bottom of the insertion groove 71 is provided with an anti-detachment protrusion 8.

[0045] Specifically, a mechanical interlock is formed between the insertion slot 71 and the insertion part 2 of the serpentine spring fixing buckle, achieving tool-free disassembly and assembly and stable load-bearing. During installation, after the anti-detachment protrusion 8 at the bottom of the insertion slot 71 contacts the insertion end of the insertion part 2, it elastically deforms to allow for displacement. Once the insertion part 2 is fully embedded, the anti-detachment protrusion 8 resets and locks below the hook hole 4 of the insertion part 2, forming a longitudinal anti-detachment lock. This design ensures that when the serpentine spring is under tension, the anti-detachment protrusion 8 rigidly supports and restricts the reverse displacement of the insertion part 2, preventing the fixing buckle from accidentally detaching. Simultaneously, the inner wall of the insertion slot 71, the groove 3, the guide slope 5, and the arc transition surface 6 of the insertion part 2 work together to disperse the composite force transmitted by the spring through multi-directional contact surfaces, reducing both the local load-bearing pressure on the frame 7 and the fretting wear of the insertion part 2 during dynamic use.

[0046] Preferred, such as Figure 7 As shown, the inner wall of the insertion groove 71 is provided with a limiting rib 9 corresponding to the groove 3. The limiting rib 9 is used to cooperate with the groove 3 to realize the axial limiting of the insertion part 2, and the height of the limiting rib 9 is 1.5-2.5mm.

[0047] Specifically, when the insertion end of the plug part 2 is pushed into the plug groove 71 of the furniture frame 7, the grooves 3 on both sides of the plug part 2 and the limiting ribs 9 on the inner wall of the plug groove 71 are interlocked to form an axial limit; and when the plug part 2 is subjected to the tension or pressure of the serpentine spring, the extension of the groove 3 will evenly transmit the force to the limiting ribs 9, avoiding the risk of deformation or slippage of the fixing buckle due to local stress concentration.

[0048] The installation process of this utility model's serpentine spring fixing buckle is as follows:

[0049] First, insert the plug part 2 of the fixing buckle along the plug groove 71 on the frame 7 until the lateral positioning structure at the intersection of the fixing part 1 and the plug part 2 abuts against the side wall of the frame 7, so that the groove 3 and the limiting rib 9 cooperate to ensure that the fixing buckle is securely installed on the frame 7; then, align the end of the serpentine spring with the hook hole 4 of the fixing buckle to insert the end of the serpentine spring into it, thus completing the installation of the serpentine spring; when it is necessary to remove the serpentine spring, simply remove the serpentine spring from the hook hole by hand so that the end of the serpentine spring is detached from the connecting part, and the serpentine spring can be easily removed; then, remove the fixing buckle from the frame 7 by sliding it in the opposite direction, which facilitates further maintenance or replacement of the fixing buckle and the serpentine spring.

[0050] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A serpentine spring retaining buckle, characterized in that, The device includes a T-shaped integrally formed fixing part and a plug-in part, with a lateral limiting structure formed at the intersection of the fixing part and the plug-in part; one end of the plug-in part near the fixing part is a connecting end, and the other end is an insertion end; the plug-in part has symmetrically distributed grooves on both sides of the connecting end, and the grooves extend axially along the length of the plug-in part; the plug-in part has a hook hole penetrating its thickness on the insertion end, and the hook hole is used to hook a serpentine spring, and the hook hole and the groove are arranged side by side on the axis of the plug-in part.

2. The serpentine spring retaining buckle according to claim 1, characterized in that, The plug-in part is provided with guide slopes on both sides of the insertion end, and the inclination direction of the guide slopes is set downward from the hook hole towards the insertion end.

3. The serpentine spring retaining buckle according to claim 1, characterized in that, The insertion end of the plug is configured as an arc transition surface, and the two ends of the arc transition surface are smoothly connected to the upper and lower surfaces of the plug.

4. The serpentine spring retaining buckle according to claim 1, characterized in that, The groove extends axially along the insertion part for half the total length of the insertion part, and the bottom surface of the groove is a planar structure. The groove depth is 3-5mm.

5. The serpentine spring retaining buckle according to claim 1, characterized in that, The hook hole has a U-shaped opening structure, and its opening width is 2-4mm larger than the diameter of the serpentine spring wire. The bottom of the hook hole is rounded.

6. The serpentine spring retaining buckle according to claim 1, characterized in that, The fixing part has chamfers on both sides, and the radius of curvature R of the chamfers is 1-3mm.

7. A furniture frame structure, characterized in that: The serpentine spring retainer as described in any one of claims 1-6 is provided with a circumferentially provided insertion groove that mates with the insertion part, and an anti-detachment protrusion is provided at the bottom of the insertion groove.

8. The furniture frame structure according to claim 7, characterized in that: The inner wall of the insertion groove is provided with a limiting rib corresponding to the groove. The limiting rib is used to cooperate with the groove to realize the axial limiting of the insertion part, and the height of the limiting rib is 1.5-2.5mm.

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