Coating connection structure of metal and plastic part

Abstract

The utility model discloses a coating connection structure for metal and plastic parts, which is firm in connection and fixation, convenient to assemble, not limited by using temperature and application scenes, and suitable for popularization. Comprising a main body made of a plastic material and a metal shell made of a metal material, the outer side of the main body is coated with the metal shell, and the fixing piece made of the plastic material is buckled with the main body and clamped between the main body and the metal shell; a limiting structure is further arranged between the fixing piece and the metal shell and used for preventing the metal shell from falling off.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal and plastic parts fixing structures, and particularly relates to a metal and plastic parts covering and connecting structure. Background Technology

[0002] Currently, there is a wide variety of products with diverse shapes and sizes. Thanks to the characteristics of plastic materials, there are more and more products made of plastic. Although plastic products can be colored in a variety of colors, it is difficult to process them into products with a metallic texture, and they have a short lifespan and are easily damaged. Metal materials have irreplaceable characteristics in many scenarios.

[0003] Currently, the connection methods between metal parts and plastic parts on the market are basically fixed by glue application or welding (such as the handle and lid of a water cup). However, glue application is limited by the uniformity of glue application and the temperature of use, and the probability of the two parts separating in actual use is relatively high. Welding is a method of fixing the two parts together by heating the metal parts to melt the plastic. Heating the metal parts can easily cause the surface of the metal parts to change color, and the surface of the metal parts cannot have a coating, which limits the application scenarios. Summary of the Invention

[0004] The purpose of this invention is to provide a metal and plastic encapsulation connection structure that provides a firm and secure connection, is easy to assemble, and is not limited by operating temperature or application scenario, making it suitable for widespread application.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A metal and plastic encapsulation connection structure includes a body made of plastic material and a metal shell made of metal material, the metal shell covering the outside of the body, and a fastener made of plastic material that is fastened to the body and clamped between the body and the metal shell; a limiting structure is also provided between the fastener and the metal shell to prevent the metal shell from falling off.

[0007] By adopting the above technical solution, a fastener is set between the main body and the metal shell. After assembly, the fastener can be used to open the metal shell, so that the metal shell maintains a rigid and elastic force to hold the fastener. The fastener is set to snap onto the main body. Therefore, the fastener can be fixed to the main body, and the metal shell can be fixed to the fastener to prevent it from falling off. Moreover, a limiting structure is set between the fastener and the metal shell to further prevent the metal shell from falling off. This structure does not require glue or heating of the metal shell, avoiding some usage limitations and solving the problems existing in the prior art. Moreover, during assembly, the fastener is first placed inside the metal shell, and then the fastener is aligned with the main body to complete the snap-on. Compared with the assembly methods of glue application and welding, the above structure is more convenient and faster to assemble.

[0008] Preferably, a groove is provided on one side of the upper end of the main body; a buckle is provided on one side of the fastener; the buckle is inserted into the groove.

[0009] By adopting the above technical solution, the fastener and the main body can be well connected through the combination of the snap-in groove and the snap-in, which also facilitates assembly.

[0010] Preferably, the stop above the groove and the bottom mating surface of the undercut are respectively set as a first guide slope and a second guide slope.

[0011] By adopting the above technical solution, the combination of the first guide slope and the second guide slope facilitates the pressing and fastening of the fastener and the main body after alignment, and makes it easy for the fastener to slide into the fastening groove.

[0012] Preferably, the metal shell has a hollow cavity with an opening at its lower end; the side wall of the metal shell that mates with the fastener is inclined toward the cavity to form a force-applying cone surface; the side wall of the fastener is provided with a force-receiving cone surface with the same inclination as the force-applying cone surface; the force-applying cone surface is in close contact with the outer side of the force-receiving cone surface to form a limiting structure.

[0013] Using the above technical solution, in this embodiment, by setting the force-applying cone surface and the force-receiving cone surface close to each other, the inverted cone structure can prevent the metal shell from falling off the fixing component. At the same time, the force-applying cone surface can also form an upward oblique force on the force-receiving cone surface, resulting in a greater clamping force on the fixing component.

[0014] Preferably, the metal shell has a hollow cavity with an opening at its lower end; the limiting structure is configured such that a bent portion extending into the cavity is provided at the lower end of the metal shell, and the bent portion abuts against and limits the lower end of the fixing member.

[0015] Using the above technical solution, in this embodiment, by providing a bent portion at the lower end of the metal shell that abuts against the lower end of the fixing member, the metal shell can be prevented from falling off the fixing member.

[0016] Preferably, the lower end of the side wall of the main body is provided with a limiting step, and the lower end of the side wall of the metal shell abuts against and is limited on the limiting step.

[0017] By adopting the above technical solution, the lower end of the metal shell can be stopped by the limiting step. Furthermore, through design, the side wall of the metal shell can be flush with or recessed with the outer surface of the limiting step, thus avoiding the problem of the lower end of the metal shell being exposed, which could cause scratches or unsightly issues. Attached Figure Description

[0018] Figure 1 This is a three-dimensional exploded structural diagram of Example 1.

[0019] Figure 2 This is a cross-sectional structural diagram of Example 1.

[0020] Figure 3 This is a cross-sectional structural diagram of Example 2. Detailed Implementation

[0021] To make the technical solution of this utility model clearer, the following description is in conjunction with the appendix. Figures 1 to 3 This specification provides a detailed description of the present invention. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the scope of protection of the present invention.

[0022] This utility model is a metal and plastic encapsulation connection structure, which includes a main body 1, a fixing member 2, and a metal shell 3 from the inside out. The main body 1 and the fixing member 2 are made of plastic, while the metal shell 3 is made of metal (such as stainless steel or titanium). The fixing member 2 and the main body 1 are fastened together. The metal shell 3 tightly covers the outside of the main body 1 and the fixing member 2, and the fixing member 2 is held tightly between the metal shell 3 and the main body 1. In order to further strengthen the connection between the metal shell 3 and the main body 1 and the fixing member 2, a limiting structure is also provided between the metal shell 3 and the fixing member 2. Example 1

[0023] Combination Figure 1 and Figure 2 This embodiment uses the ring handle of a water cup as an example for illustration.

[0024] like Figure 1 As shown, the handle is a ring structure with a notch, and the two ends of the notch on the main body 1 are hinged parts.

[0025] like Figure 1 As shown, the upper inner side of the main body 1 is provided with several fastening grooves 11 evenly distributed around the periphery, and the outer side of the fastener 2 is provided with an inverted buckle 21; the inverted buckle 21 is inserted into the fastening groove 11.

[0026] Furthermore, the stop portion above the buckle 11 and the bottom mating surface of the buckle 21 are respectively set as a first guide slope 12 and a second guide slope 22 for guiding the sliding in during assembly.

[0027] like Figure 1 As shown in Figure 2, the metal shell 3 is annular and hollow with a cavity 30 inside; its lower end is open; the main body 1 and the fixing member 2 are located in the cavity 30, and the inner side wall and the outer side wall of the metal shell 3 are tightly fitted and held together with the fixing member 2 and the main body 1, respectively.

[0028] The inner wall of the metal shell 3 is inclined into the cavity 30 to form a force-applying cone surface 31; the inner wall of the fastener 2 is correspondingly provided with a force-receiving cone surface 23 with the same inclination as the force-applying cone surface 31; the force-applying cone surface 31 and the force-receiving cone surface 23 form the above-mentioned limiting structure, and the outer wall of the metal shell 3 is tightly attached to the outer wall of the main body 1; the force-applying cone surface 31 is tightly attached to the outer side of the force-receiving cone surface 23 and provides an upward clamping force for the fastener 2, so that the metal shell 3 can clamp and fix the fastener 2 and the main body 1.

[0029] Furthermore, such as Figure 2 As shown, the lower end of the outer side wall of the main body 1 is also provided with a limiting step 13, and the lower end of the outer side wall of the metal shell 3 abuts against and is limited on the limiting step 13.

[0030] Furthermore, the outer wall of the metal shell 3 can also be designed to be inclined into the cavity to form a conical surface, and the corresponding outer wall of the main body 1 is also designed to be an inclined surface that matches the conical surface. This can further prevent the metal shell 3 from falling off and make the connection structure more robust.

[0031] During assembly, first place the fastener 2 into the metal shell 3 so that the force-bearing cone surface 23 and the force-applying cone surface 31 fit together. Then, align the first guide slope 12 of the main body 1 with the second guide slope 22 of the fastener 2 and press it in so that the buckle 21 is locked into the buckle groove 11 for fixation.

[0032] After assembly, the inner and outer walls of the metal shell 3 will be stretched apart by the main body 1 and the fastener 2. Utilizing the properties of the metal material, the inner and outer walls of the metal shell 3 will have a real-time inward pulling force to hold the main body 1 and the fastener 2 tightly and secure them from falling off. Moreover, due to the mutual cooperation between the force-bearing cone surface 23 and the force-applying cone surface 31, the connection can be further ensured to be firm and not fall off. Example 2

[0033] Combination Figure 3 This embodiment uses a cup lid for a water cup as an example for explanation.

[0034] The upper end of the outer side wall of the main body 1 is provided with a buckle groove 11, and the inner side wall of the fastener 2 is provided with a corresponding buckle 21; the buckle 21 is inserted into the buckle groove 11.

[0035] Furthermore, the stop portion above the buckle 11 and the bottom mating surface of the buckle 21 are respectively set as a first guide slope 12 and a second guide slope 22 for guiding the sliding in during assembly.

[0036] The metal shell 3 is hollow and has a cavity 30, with an opening at the lower end. The main body 1 and the fixing member 2 are located inside the cavity 30 and are held tightly by the metal shell 3.

[0037] In one embodiment, the sidewall of the metal shell 3 is inclined into the cavity 30 to form a force-applying cone surface 31; the outer sidewall of the fastener 2 is correspondingly provided with a force-receiving cone surface 23 with the same inclination as the force-applying cone surface 31; the force-applying cone surface 31 and the force-receiving cone surface 23 form the above-mentioned limiting structure, the force-applying cone surface 31 is closely attached to the outer side of the force-receiving cone surface 23, and provides the fastener 2 with an upward clamping force, so that the fastener 2 can be clamped and fixed between the metal shell 3 and the main body 1.

[0038] In another embodiment, the limiting structure is configured such that a bent portion 32 extending into the cavity 30 is provided at the lower end of the metal shell 3, and the bent portion 32 abuts against the lower end of the fixing member 2 to limit and prevent it from falling off.

[0039] Furthermore, such as Figure 2 As shown, a limiting step 13 is also provided at the lower end of the outer side wall of the main body 1, and the lower end of the side wall of the metal shell 3 abuts against and is limited on the limiting step 13.

[0040] During assembly, first place the fastener 2 into the metal shell 3 so that the outer side wall of the fastener 2 fits against the side wall of the metal shell 3. Then, align the first guide slope 12 of the main body 1 with the second guide slope 22 of the fastener 2 and press it in so that the buckle 21 is locked into the buckle groove 11 for fixation.

[0041] After assembly, the side wall of the metal shell 3 is opened by the fastener 2. Utilizing the properties of the metal material, the side wall of the metal shell 3 has a real-time inward contraction force to hold the fastener 2 tightly and prevent it from falling off. Moreover, due to the limiting fit between the bent part 32 and the lower end of the fastener 2, the connection can be further ensured to be firm and not fall off.

Claims

1. A metal and plastic encapsulation connection structure, comprising a body (1) made of plastic material and a metal shell (3) made of metal material, the metal shell (3) covering the outside of the body (1), characterized in that: It also includes a fastener (2) made of plastic material that is fastened to the main body (1) and clamped between the main body (1) and the metal shell (3); A limiting structure is also provided between the fastener (2) and the metal shell (3) to prevent the metal shell (3) from falling off.

2. The metal and plastic part covering connection structure according to claim 1, characterized in that: The main body (1) has a buckle groove (11) on one side of the upper end; One side of the fastener (2) is provided with a buckle (21); The buckle (21) is inserted into the buckle groove (11).

3. The metal and plastic part covering connection structure according to claim 2, characterized in that: The stop above the buckle (11) and the bottom mating surface of the buckle (21) are respectively set as the first guide slope (12) and the second guide slope (22).

4. The metal and plastic part covering connection structure according to any one of claims 1-3, characterized in that: The metal shell (3) has a hollow cavity (30) inside, and its lower end is open; The sidewall of the metal shell (3) that mates with the fastener (2) is inclined into the cavity (30) to form a force-applying cone surface (31); The side wall of the fastener (2) is provided with a force-bearing cone surface (23) with the same slope as the force-applying cone surface (31); The force-applying cone (31) is attached to the outside of the force-receiving cone (23) to form a limiting structure.

5. The metal and plastic part covering connection structure according to any one of claims 1-3, characterized in that: The metal shell (3) has a hollow cavity (30) inside, and its lower end is open; The limiting structure is configured such that a bent portion (32) extending into the cavity (30) is provided at the lower end of the metal shell (3), and the bent portion (32) abuts against the lower end of the fastener (2) for limiting.

6. The metal and plastic part covering connection structure according to claim 1, characterized in that: The lower end of the side wall of the main body (1) is also provided with a limiting step (13), and the lower end of the side wall of the metal shell (3) abuts against the limiting step (13).

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