Expansion screw decorative cover and expansion screw kit

Abstract

The utility model discloses an expansion screw decorative cover and an expansion screw suite, and the expansion screw decorative cover comprises a decorative cover body, one end of which is recessed inwards to form a containing cavity; the clamping teeth are arranged in the middle of the accommodating cavity, extend towards the opening of the accommodating cavity and extend out of the opening; the clamping teeth of the decorative cover are matched with the clamping openings in the end face of the expansion screw, so that a gasket and a copper ring are omitted, and the material cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home furnishing, and particularly relates to an expansion screw decorative cover and an expansion screw kit. BACKGROUND

[0002] In the field of custom furniture installation, especially in the fixing operation of load-bearing components such as wall cabinets and layers, the combination of expansion screws and decorative covers has become the mainstream technical solution in the industry. The current market generally adopts the installation mode of mirror nail decorative cover matched with expansion screw, and the standard kit contains multiple independent components such as metal decorative cover, copper ring, rubber ring, expansion screw and expansion tube. This technical solution has the following significant defects:

[0003] Material management is complicated: the multiple-component structure (decorative cover, copper ring, rubber ring) leads to a sharp increase in the number of product SKUs, which not only increases the warehouse management cost of enterprises, but also easily causes the missing or mismatching of accessories on the installation site, affecting the construction efficiency.

[0004] Durability defects: the existing metal decorative cover is usually treated by electroplating process, which is easy to be oxidized and corroded in a humid environment (such as kitchen and bathroom space), and rust spots will be generated after the plating layer peels off, resulting in obvious color difference in the contact area between the furniture and the wall.

[0005] Installation process is complicated: the existing technology needs to perform a step-by-step assembly operation - first, the copper ring, rubber ring and expansion screw are pre-assembled and locked to the wall, and then the decorative cover is assembled by screwing after the expansion structure is completely fixed. This process has two major pain points: first, the pre-assembly precision of the copper ring and the rubber ring directly affects the final assembly effect of the decorative cover, and the operation has low fault tolerance; second, the screwing process needs to use special tools and takes a long time, and the average single-point installation time is 3-5 minutes, which significantly restricts the installation efficiency of large-scale projects.

[0006] In view of the above industry pain points, the market urgently needs a new decorative cover technical solution with high integration degree, strong weather resistance and convenient installation. The existing technical improvements are mainly focused on surface treatment process optimization (such as the nano coating technology proposed in CN210217210U) or connection structure improvement (such as the buckle type decorative cover designed in CN211950712U), but they have not fundamentally solved the common problem of multiple-component dependence and complex assembly process, and have not achieved the synergistic improvement of material performance and installation efficiency. INVENTION CONTENTS

[0007] To solve the above technical problems, the utility model provides an expansion screw decorative cover and an expansion screw kit, which match the clamping interface of the decorative cover with the clamping interface of the end face of the expansion screw, omit the gasket and the copper ring, and effectively reduce the material cost.

[0008] The utility model adopts the following technical scheme:

[0009] An expansion screw decorative cover, comprising:

[0010] A decorative cover body, one end of which is inwardly recessed to form a receiving cavity;

[0011] A clamping tooth provided in the middle of the receiving cavity, extending towards and protruding out of the opening of the receiving cavity;

[0012] The receiving cavity structure formed by the decorative cover body can effectively wrap the head of the expansion screw, and the design of the clamping tooth extending out of the opening can realize quick clamping and fixing with the expansion screw, which not only hides the exposed part of the screw head to improve the aesthetics, but also provides stable mechanical connection to prevent the decorative cover from falling off, without the need to install the gasket and copper ring in the prior art.

[0013] As a preferred, the decorative cover body and / or the clamping tooth are made of PVC nickel-plated material, the PVC material gives the decorative cover good elastic deformation ability for easy installation, the nickel plating treatment not only enhances the surface wear resistance and corrosion resistance, but also forms a metallic luster appearance to improve the decoration, while considering cost control and processing convenience.

[0014] As a preferred, the decorative cover body includes a cover surface and a surrounding wall integrally formed on the cover surface, the integrally formed cover surface and surrounding wall structure eliminates the joint weakness of the split design, improves the overall structural strength and sealing performance, simplifies the production process, and the surrounding wall design can effectively shield the surrounding of the screw hole.

[0015] As a preferred, the surrounding wall has a slope of 1-10 degrees, which forms a tapered structure, is beneficial to mold demolding to improve production efficiency, and can ensure smooth transition of the appearance while achieving maximum range of coverage to prevent installation from being exposed.

[0016] As a preferred, the clamping tooth includes a cylindrical clamping tooth body and a guide portion provided at the end of the clamping tooth body, the cylindrical clamping tooth body provides uniform radial support force, the tapered design of the guide portion can guide the precise alignment of the decorative cover and the screw, reduce installation error, and the two form a progressive clamping structure to improve assembly reliability.

[0017] As a preferred, the diameter of the guide portion is smaller than the diameter of the clamping tooth body; and there is an arc portion between the guide portion and the clamping tooth body, the step structure formed by the diameter difference enhances the elastic reset ability of the clamping tooth, and the arc transition design effectively disperses stress concentration, which not only prevents plastic deformation caused by repeated disassembly, but also reduces the risk of fracture of the guide portion during assembly.

[0018] An expansion screw kit, comprising an expansion tube and an expansion screw, and further comprising an expansion screw decorative cover, which realizes standardized cooperation of the decorative cover and the expansion screw assembly through kit design.

[0019] As preferred, the end face of the expansion screw is provided with a clamping port matched with the clamping teeth, the special clamping port and the clamping teeth form a complementary occlusion structure, the fixing of the decorative cover is realized through physical limiting, the aging and falling problems of the traditional adhesive mode are effectively avoided, and the later maintenance and disassembly are facilitated.

[0020] As preferred, the end face of the expansion screw is provided with a slot, and the clamping port is located in the middle of the slot. The slot is designed to provide a precise positioning reference for the clamping port, preventing the decorative cover from being circumferentially offset during installation.

[0021] As preferred, the clamping port comprises a clamping part and a guide opening. The guide opening is used for quick positioning, and the clamping part is used for firm locking, so that the convenience of installation and the final fixing reliability are considered.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] 1. The accommodating cavity structure formed by the decorative cover body can effectively wrap the head of the expansion screw. The design that the clamping teeth extend out of the opening can realize quick clamping and fixing with the expansion screw, which hides the exposed part of the screw head to improve the aesthetics, provides stable mechanical connection to prevent the decorative cover from falling off, and does not need to install the gasket and copper ring in the prior art.

[0024] 2. The decorative cover is made of PVC nickel-plated material. The PVC material gives the decorative cover good elastic deformation capacity for convenient installation. The nickel-plating treatment enhances the surface wear resistance and corrosion resistance, forms a metal luster appearance to improve the decoration, and considers the cost control and processing convenience. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the decorative cover.

[0026] Figure 2 It is a right view of Figure 1 .

[0027] Figure 3 It is a structural schematic view of the expansion pipe.

[0028] Figure 4 It is a structural schematic view of the expansion screw.

[0029] Figure 5 It is a side view of the expansion screw.

[0030] Figure 6 It is a structural schematic view of the expansion screw kit.

[0031] In the figure, the decorative cover body 1, the receiving cavity 1-1, the cover surface 1-2, the enclosure 1-3, the snap-fit ​​tooth 2, the snap-fit ​​tooth body 2-1, the guide part 2-2, the expansion tube 3, the expansion screw 4, the snap-fit ​​interface 4-1, the snap-fit ​​part 4-1-1, the guide opening 4-1-2, and the groove 4-2. Detailed Implementation

[0032] To facilitate understanding of the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figures 1-3 As shown, an expansion screw decorative cover includes:

[0035] The decorative cover body 1 has one end recessed inward to form a receiving cavity 1-1;

[0036] The snap-fit ​​tooth 2 is located in the middle of the receiving cavity 1-1, extends toward the opening of the receiving cavity 1-1 and protrudes from the opening;

[0037] The cavity structure formed by the decorative cover body can effectively enclose the head of the expansion screw. The design of the snap-fit ​​teeth extending into the opening can achieve quick snap-fit ​​and fixation with the expansion screw. It not only hides the exposed part of the screw head to improve aesthetics, but also provides a stable mechanical connection to prevent the decorative cover from falling off, eliminating the need for the washers and copper rings used in existing technologies.

[0038] The decorative cover body 1 and / or the snap-fit ​​teeth 2 are made of nickel-plated PVC. The PVC material gives the decorative cover good elastic deformation ability, which is convenient for installation. The nickel plating treatment not only enhances the surface wear resistance and corrosion resistance, but also forms a metallic luster to enhance the decoration, while taking into account cost control and processing convenience.

[0039] The decorative cover body 1 includes a cover surface 1-2 and a barrier 1-3 integrally formed on the cover surface 1-2. The integrally formed cover surface and barrier structure eliminates the weakness of the joints in the split design, improves the overall structural strength and sealing performance, simplifies the production process, and the barrier design can effectively cover the area around the screw holes.

[0040] The enclosure 1-3 has a slope of 1-10 degrees, forming a tapered structure that facilitates mold release, improves production efficiency, and ensures a smooth transition in appearance while maximizing coverage to prevent installation from being exposed. The preferred slope of enclosure 1-3 is 3 degrees.

[0041] The clamping tooth 2 comprises a cylindrical clamping tooth body 2-1 and a guide portion 2-2 arranged at the end of the clamping tooth body 2-1, the cylindrical clamping tooth body provides uniform radial support force, and the tapered design of the guide portion can guide the accurate alignment of the decorative cover and the screw, thereby reducing the installation error, and the two form a progressive clamping structure to improve the assembly reliability.

[0042] The diameter of the guide portion 2-2 is smaller than that of the clamping tooth body 2-1; the guide portion 2-2 and the clamping tooth body 2-1 have an arc-shaped portion, the step structure formed by the diameter difference enhances the elastic reset capability of the clamping tooth, and the arc-shaped transition design effectively disperses stress concentration, thereby preventing plastic deformation caused by repeated disassembly and reducing the risk of fracture of the guide portion during assembly.

[0043] As shown in Figures 4-6 An expansion screw kit comprises an expansion tube 3 and an expansion screw 4, and further comprises an expansion screw decorative cover, and the standardized cooperation of the decorative cover and the expansion screw assembly is realized through the kit design. The expansion tube 3 is a common expansion tube in the prior art and is made of nylon.

[0044] The end face of the expansion screw 4 is provided with a clamping port 4-1 matched with the clamping tooth 2, the special clamping port and the clamping tooth form a complementary occlusion structure, the fixation of the decorative cover is realized through physical limiting, the aging and falling problems of the traditional adhesive mode are effectively avoided, and the expansion screw is convenient for later maintenance and disassembly. Compared with the expansion screw on the market, the non-full-car tooth screw body structure is adopted, on the one hand, the stress points of the non-full-car tooth installation are increased to ensure that the screw installation has greater structural bearing, and on the other hand, the structural fracture risk caused by deepening of the cross groove is reduced.

[0045] The end face of the expansion screw 4 is provided with a slot 4-2, and the clamping port 4-1 is located in the middle of the slot 4-2, and the slot is designed to provide a precise positioning reference for the clamping port, so that the circumferential deviation of the decorative cover during installation is prevented.

[0046] The clamping port 4-1 comprises a clamping portion 4-1-1 and a guide opening 4-1-2, the clamping port is quickly positioned through the guide opening, and firm locking is realized through the clamping portion, so that the installation convenience and the final fixation reliability are considered.

[0047] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is subject to the scope defined by the claims, and some improvements and decorations made by the person skilled in the art without departing from the spirit and range of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An expansion screw trim cap, characterized by, The utility model relates to a decorative cover, comprising: a decorative cover body (1) with one end inwardly recessed to form a receiving cavity (1-1); a clamping tooth (2) arranged in the middle of the receiving cavity (1-1) and extending towards and protruding out of the opening of the receiving cavity (1-1).

2. The expansion screw trim cap of claim 1, wherein, The decorative cover body (1) and / or the clamping tooth (2) are made of PVC with nickel plating.

3. The expansion screw trim cap of claim 1, wherein, The decorative cover body (1) comprises a cover surface (1-2) and a surrounding barrier (1-3) integrally formed on the cover surface (1-2).

4. The expansion screw trim cap of claim 3, wherein, The surrounding barrier (1-3) has a slope of 1-10 degrees.

5. The expansion screw trim cap of claim 1, wherein, The clamping tooth (2) comprises a cylindrical clamping tooth body (2-1) and a guide portion (2-2) arranged at the end of the clamping tooth body (2-1).

6. The expansion screw trim cap of claim 5, wherein, The diameter of the guide portion (2-2) is smaller than that of the clamping tooth body (2-1); and there is an arc-shaped portion between the guide portion (2-2) and the clamping tooth body (2-1).

7. An expansion screw kit, characterized in that, The utility model relates to an expansion pipe (3) and an expansion screw (4), and further comprises the expansion screw decorative cover as claimed in any one of claims 1-6.

8. The expansion screw kit of claim 7, wherein, The end surface of the expansion screw (4) is provided with a clamping opening (4-1) matching the clamping tooth (2).

9. The expansion screw kit of claim 8, wherein, The end surface of the expansion screw (4) is provided with a slot (4-2), and the clamping opening (4-1) is located in the middle of the slot (4-2).

10. The expansion screw kit of claim 9, wherein, The clamping opening (4-1) comprises a clamping portion (4-1-1) and a guide opening (4-1-2).

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