Connector

Abstract

The utility model discloses a connector, which comprises a connector body, an internal protection part, a middle protection layer and an external protection layer, and is characterized in that the connector body comprises a connector rubber core and a circuit board arranged on the connector rubber core; the internal protection part is encapsulated on the circuit board; the middle protection layer is encapsulated at one end, close to the circuit board, of the internal protection part and the connector rubber core; the external protection layer is encapsulated at one end, close to the circuit board, of the middle protection layer and the connector rubber core; the material thermal deformation temperature of the internal protection part is smaller than that of the middle protection layer, and the material thermal deformation temperature of the middle protection layer is smaller than that of the external protection layer.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a connector. Background Technology

[0002] In the prior art, connectors containing electronic components are generally protected by single-layer or double-layer adhesive. Since the electronic components are not resistant to high temperatures and are not waterproof, the electronic components are easily damaged by high temperatures, high-voltage impacts, or short circuits caused by water ingress during use. This can lead to poor electrical performance, resulting in failure of the connector's signal transmission function or safety issues. Utility Model Content

[0003] The purpose of this invention is to provide a connector.

[0004] This utility model provides a connector, which includes a connector body, an inner protective part, a middle protective layer, and an outer protective layer. The connector body includes a connector core and a circuit board disposed on the connector core. The inner protective part is coated with adhesive to the circuit board. The middle protective layer is coated with adhesive to the inner protective part and the end of the connector core near the circuit board. The outer protective layer is coated with adhesive to the middle protective layer and the end of the connector core near the circuit board. The heat distortion temperature of the material of the inner protective part is lower than that of the material of the middle protective layer, and the heat distortion temperature of the material of the middle protective layer is lower than that of the material of the outer protective layer.

[0005] The circuit board of the connector in this application is encapsulated with multiple layers of adhesive, namely an inner protective layer, a middle protective layer, and an outer protective layer. The heat distortion temperature of the material in the outer protective layer, the middle protective layer, and the inner protective layer decreases sequentially, so that the heat distortion temperature of the material in the inner protective layer is lower than the temperature resistance of the electronic components on the circuit board. Therefore, the inner protective layer, the middle protective layer, and the outer protective layer can not only cover and fix the electronic components on the circuit board 24, protecting them from high temperatures, injection pressure, and temperature shocks during production, processing, and long-term use, but also provide waterproof, impact-resistant, and crack-resistant protection during long-term use. Attached Figure Description

[0006] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below.

[0007] Figure 1 This is a three-dimensional structural diagram of the connector provided in the first embodiment of this utility model.

[0008] Figure 2 yes Figure 1A schematic diagram of one side of the connector in the diagram.

[0009] Figure 3 yes Figure 1 The diagram shows the end structure of the connector.

[0010] Figure 4 yes Figure 3 A cross-sectional view of the connector along line IX-IX.

[0011] Figure 5 yes Figure 4 An exploded view of the connector in the diagram.

[0012] Figure 6 yes Figure 1 A schematic diagram of the process of applying the adhesive layer to the connector.

[0013] Figure 7 This is a schematic diagram of the end face structure of the connector provided in the second embodiment of this utility model.

[0014] Figure 8 yes Figure 7 A cross-sectional view of the connector along line VIII-VIII.

[0015] Figure 9 This is a cross-sectional view of the connector provided in the third embodiment of this utility model.

[0016] Figure 10 This is a cross-sectional view of the connector provided in the fourth embodiment of this utility model.

[0017] Figure 11 This is a cross-sectional view of the connector provided in the fifth embodiment of this utility model. Detailed Implementation

[0018] 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, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort should fall within the protection scope of the present utility model.

[0019] It should be noted that, in this document, the reference to "embodiment" or "implementation" means that a specific feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments.

[0020] The terms "first" and "second" used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. It should be noted in the description of this utility model that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figures 1-4 The connector 100 in the first embodiment of this utility model includes a connector body 20, an inner protective part 30, a middle protective layer 50, and an outer protective layer 60. The connector body 20 includes a connector core 22 and a circuit board 24 disposed on the connector core 22. The inner protective part 30 is coated with the circuit board 24, and the middle protective layer 50 is coated with the inner protective part 30 and the end of the connector core 22 near the inner protective part 30. The outer protective layer 60 is coated with the middle protective layer 50 and the end of the connector core 22 near the inner protective part 30. The heat deformation temperature of the material of the inner protective part 30 is lower than that of the material of the middle protective layer 50, and the heat deformation temperature of the material of the middle protective layer 50 is lower than that of the material of the outer protective layer 60.

[0022] The circuit board 24 of the connector 100 of this application is encapsulated with multiple layers of adhesive, namely an inner protective layer 30, a middle protective layer 50, and an outer protective layer 60. The heat distortion temperature of the material of the outer protective layer 60, the middle protective layer 50, and the inner protective layer 30 decreases sequentially, so that the heat distortion temperature of the material of the inner protective layer 30 is lower than the temperature resistance of the electronic components on the circuit board 24. Therefore, the inner protective layer 30, the middle protective layer 50, and the outer protective layer 60 can not only cover and fix the electronic components 242 on the circuit board 24, protecting them from high temperatures, injection pressure, and temperature shocks during production, processing, and long-term use, but also provide waterproofing, impact resistance, and crack prevention during long-term use of the connector 100.

[0023] The inner protective layer 30 is made of a material with a low heat distortion temperature during molding. The inner protective layer 30 can be made of, but is not limited to, silicone, polyamide plastic, polyoxymethylene plastic, polycarbonate plastic, or polyetheretherketone plastic, and is not limited to injection molding or potting compound. The inner protective layer 30 is molded around the circuit board 24, allowing it to cover and fix the electronic components 242 on the circuit board 24. The inner protective layer 30 directly isolates the electronic components 242 on the circuit board 24 from the high temperatures of the middle protective layer 50 during manufacturing. Because the material of the inner protective layer 30 has a low heat distortion temperature—that is, the heat distortion temperature of the material of the inner protective layer 30 is lower than the temperature resistance of the electronic components on the circuit board 24—it can prevent the high melting temperature of the inner protective layer 30 during injection molding from burning the electronic components, or prevent the high temperature of the potting compound during baking from burning the electronic components.

[0024] The plastic material used in the middle protective layer 50 has a heat distortion temperature between that of the plastic material used in the inner protective layer 30 and that of the plastic material used in the outer protective layer 60 during the molding process, thus serving as a transition layer. Specifically, the middle protective layer 50 can be made of, but is not limited to, PE plastic material, polyester plastic material, PVC plastic material, polycarbonate plastic material, etc. The middle protective layer 50 prevents the inner protective layer 30 from melting due to the high melting temperature of the plastic material used in the outer protective layer 60 during the injection molding process.

[0025] The outer protective layer 60 is made of a plastic material with a high heat distortion temperature. The plastic material used for the outer protective layer 60 can be, but is not limited to, high-temperature polyamide plastic material, polyimide plastic material, etc. The outer protective layer 60 is used for waterproofing, impact resistance, and crack prevention.

[0026] Optionally, the material stress of the inner protective layer 30 is less than that of the middle protective layer 50, and the material stress of the middle protective layer 50 is less than that of the outer protective layer 60. Specifically, the inner protective layer 30 is made of a material with low material stress during the molding process. This material is not limited to injection molding plastics or potting compounds. The inner protective layer 30 can prevent damage to electronic components on the circuit board caused by the high pressure injected during injection molding of injection molding plastics, or damage to electronic components caused by the stress generated during the curing of potting compounds. The stress generated during the molding process of the plastic material selected for the middle protective layer 50 is between the stress generated during the molding process of the plastic material selected for the inner protective layer 30 and the stress generated during the molding process of the plastic material selected for the outer protective layer 60, and the middle protective layer 50 plays a transitional role. The middle protective layer 50 isolates the electronic components 242 on the circuit board 24 from the high-pressure impact during manufacturing through the internal protective layer 30. Simultaneously, the middle protective layer 50 prevents the material of the internal protective layer 30 from flowing into the outer protective layer 60 and mixing with it, thus avoiding affecting the performance of the outer protective layer 60 material and preventing problems such as cracking and poor waterproofing of the connector 100 during long-term use. The outer protective layer 60 is made of a high-stress material and is used for waterproofing, impact resistance, and crack prevention.

[0027] like Figure 4 and Figure 5 As shown, the connector core 22 includes a connecting portion 221 and a plug-in portion 223 located at opposite ends, and an operating sleeve 225 sleeved on the plug-in portion 223. The plug-in portion 223 is provided with plug-in terminals 224. The circuit board 24 is located between the connecting portion 221 and the internal protective portion 30, and the internal protective portion 30 abuts against the end face of the connecting portion 221 away from the plug-in portion 223. In this embodiment, the plug-in portion 223 is a cylindrical cylinder, and the connecting portion 221 is a cylindrical column. One end of the cylindrical cylinder is connected to one end of the cylindrical column. The plug-in portion 223 and the connecting portion 221 are coaxial. The inner cavity of the plug-in portion 223 is provided with a plurality of plug-in terminals 224 spaced apart from each other. One end of each plug-in terminal 224 is housed in the inner cavity of the cylindrical cylinder, and the other end of the plug-in terminal 224 is fixedly connected to the cylindrical column. One end of the circuit board 24 is connected to the end of the cylindrical column opposite to the cylindrical tube, and the other end of the circuit board 24 is connected to the connecting part 221. The circuit board 24 is provided with electronic components 242 and solder pads 244, which are used for soldering cables 245.

[0028] The outer peripheral surface of the connecting portion 221 is provided with multiple connecting grooves 226, which are arranged along an axial direction parallel to the plug-in terminal 224. Preferably, the multiple connecting grooves 226 are arranged at intervals along an axial direction parallel to the plug-in terminal 224. Specifically, multiple connecting grooves 226 are provided at the end of the outer peripheral surface of the connecting portion 221 away from the plug-in portion 223, and each connecting groove 226 surrounds the circumference of the connecting portion 221. The connecting grooves 226 and the connecting portion 221 are coaxial. The operating sleeve 225 includes a positioning cylinder 2251 sleeved on the plug-in portion 223 and an operating portion 2253 connected to the positioning cylinder 2251. The outer peripheral surface of the plug-in portion 223 is provided with threads 2254, and the outer peripheral surface of the operating portion 2253 is provided with anti-slip textures 2256.

[0029] Optionally, the thread 2254 is provided with at least one reducing surface 2255, which passes through the thread 2254 along an axial direction parallel to the insertion portion 223. In this embodiment, the thread 2254 is provided with two reducing surfaces 2255, which are located at opposite ends of the radial direction of the insertion portion 223, such that the two reducing surfaces 2255 on the insertion portion 223 are designed with an "H"-shaped flat position. When the mold is mass-produced, the parting line of the upper and lower molds is designed on the "H"-shaped flat position of the thread 2254 of the insertion portion 223. Even if there are burrs or rough edges, it will not affect the thread mating, which not only reduces the difficulty of production and processing, but also improves the pass rate of the connector 100.

[0030] In other embodiments, the thread 2254 of the insertion portion 223 is provided with a plurality of material reduction surfaces 2255, which are evenly spaced around the circumference of the insertion portion 223. For example, the thread 2254 is provided with three material reduction surfaces 2255, each material reduction surface 2255 passing through the thread 2254 along an axial direction parallel to the insertion portion 223, and the three material reduction surfaces 2255 are evenly spaced around the circumference of the insertion portion 223; the thread 2254 may also be provided with more than three material reduction surfaces 2255, each material reduction surface 2255 passing through the thread 2254 along an axial direction parallel to the insertion portion 223, and the three or more material reduction surfaces 2255 are evenly spaced around the circumference of the insertion portion 223.

[0031] The connecting portion 221 has an end face 227 facing away from the insertion portion 223. The inner protective portion 30 covers the circuit board 24 and abuts against the end face 227 of the connecting portion 221. A middle protective layer 50 covers the inner protective portion 30 and the connecting portion 221, and an outer protective layer 60 covers the middle protective layer 50 and the connecting portion 221. In this embodiment, the middle protective layer 50 is sealed around the connecting groove 226 of the inner protective portion 30 and the connecting portion 221 near the inner protective portion 30, and the outer protective layer 60 is sealed around the connecting groove 226 of the middle protective layer 50 and the connecting portion 221 away from the inner protective portion 30. Specifically, one end of the middle protective layer 50 fills the connecting groove 226 near the inner protective portion 30, and one end of the outer protective layer 60 fills the connecting groove 226 away from the inner protective portion 30.

[0032] In other embodiments, the outer peripheral surface of the connecting portion 221 is provided with multiple connecting flanges at the end away from the insertion portion 223, and the multiple connecting flanges are evenly spaced along the axial direction of the connecting portion 221. One end of the middle protective layer 50 is connected to the connecting flange of the connecting portion 221 near the end of the inner protective portion 30, and one end of the outer protective layer 60 is connected to the connecting flange of the connecting portion 221 away from the end of the inner protective portion 30.

[0033] like Figures 4-6 As shown, when manufacturing connector 100, the plug-in terminal 224 is assembled to the plug-in portion 223, and the circuit board 24 is assembled to the connecting portion 221; the soldering cable 245 is soldered to the circuit board 24, specifically, the soldering cable 245 is soldered to the soldering pad 244 of the circuit board 24; an inner protective portion 30 is formed on the outer periphery of the circuit board 24 and at the connection between the circuit board 24 and the soldering cable 245, such that the inner protective portion 30 seals and wraps around the end of the soldering cable 245 near the circuit board 24 and the circuit board 24, the electronic component 242 is wrapped by the inner protective portion 30, and the inner protective portion 30 abuts against the connecting portion 221; in this embodiment, the inner protective portion 30... The inner protective part 30 and the connecting part 221 are coaxial, and the outer diameter of the inner protective part 30 is equal to the outer diameter of the connecting part 221. A middle protective layer 50 is formed at the end of the inner protective part 30 and the connecting part 221 near the inner protective part 30, so that the middle protective layer 50 seals and wraps the inner protective part 30 and the connecting groove 226 near the end of the inner protective part 30. An outer protective layer 60 is formed at the end of the middle protective layer 50 and the connecting part 221 away from the middle protective layer 50, so that the outer protective layer 60 seals and wraps the middle protective layer 50 and the connecting groove 226 near the end of the middle protective layer 50. The outer peripheral surface of the outer protective layer 60 is provided with anti-slip texture 62.

[0034] The internal protective layer 30 of the connector 100 of this application covers and fixes the electronic components 242 of the circuit board 24, thereby isolating the middle protective layer 50 from the electronic components 242 of the circuit board 24. This prevents the electronic components 242 from being burned by the high temperature of the molten plastic of the middle protective layer 50 during the injection molding process, or from being damaged by the impact of the high pressure of the injection of the middle protective layer 50, or from being burned by the high temperature of the potting compound of the middle protective layer 50 during baking, or from being damaged by the stress generated when the potting compound of the middle protective layer 50 is cured. The middle protective layer 50 also acts as a transition layer, preventing the molten high temperature of the outer protective layer 60 material during the injection molding process from melting the internal protective layer 30, preventing the material of the internal protective layer 30 from flowing into the outer protective layer 60 and mixing with the material of the outer protective layer 60, thus affecting the performance of the outer protective layer 60 material. This avoids problems such as cracking and poor waterproofing of the connector 100 during long-term use.

[0035] Please refer to the following: Figure 7 and Figure 8 The connector 100a of the second embodiment of this application has a structure similar to that of the connector in the first embodiment, except that the circuit board 24 on the connector 100a in the second embodiment is offset from the axis of the connecting portion 221, and the plug terminal 224 avoids the electronic components 242 on the circuit board 24 in its axial direction. Because the circuit board 24 in this embodiment is located off-center from the connecting portion 221, the plug terminal 224 is less likely to bump into the electronic components 242 on the circuit board 24 when riveting, reducing the difficulty of manufacturing and improving the connector yield.

[0036] like Figure 9 As shown, the structure of connector 100b in the third embodiment of this application is similar to that of connector in the first embodiment, except that in the third embodiment, a first positioning tooth 32 is provided between the inner protective part 30 and the middle protective layer 50. In this embodiment, the first positioning tooth 32 is provided on the outer peripheral surface of the inner protective part 30. When the middle protective layer 50 is wrapped with plastic around the inner protective part 30, the plastic material of the middle protective layer 50 fills the first positioning tooth 32 so that the middle protective layer 50 is firmly wrapped around the inner protective part 30.

[0037] like Figure 10 As shown, the structure of the connector 100c in the fourth embodiment of this application is similar to that of the connector in the first embodiment, except that: in the fourth embodiment, a second positioning tooth 52 is provided between the middle protective layer 50 and the outer protective layer 60. In this embodiment, the second positioning tooth 52 is provided on the outer peripheral surface of the middle protective layer 50. When the outer protective layer 60 is wrapped with plastic on the middle protective layer 50, the plastic material of the outer protective layer 60 fills the second positioning tooth 52 so that the outer protective layer 60 is firmly wrapped around the middle protective layer 50.

[0038] like Figure 11 As shown, the structure of the connector 100d in the fifth embodiment of this application is similar to that of the connector in the first embodiment, except that in the fifth embodiment, a first positioning tooth 32 is provided between the inner protective part 30 and the middle protective layer 50, and a second positioning tooth 52 is provided between the middle protective layer 50 and the outer protective layer 60. Specifically, the first positioning tooth 32 is provided on the outer peripheral surface of the inner protective part 30, the plastic material of the middle protective layer 50 can fill the first positioning tooth 32, the second positioning tooth 52 is provided on the outer peripheral surface of the middle protective layer 50, and the plastic material of the outer protective layer 60 fills the second positioning tooth 52, so that the inner protective part 30, the middle protective layer 50 and the outer protective layer 60 are stably fixed together.

[0039] The connector of this utility model embodiment can be widely used in various fields such as automobiles, communications, computers, consumer electronics, industry, and transportation. For example, it can be used as a key component in new energy vehicles, electric bicycles, electric motorcycles, and electric scooters, specifically in the motors of various types of vehicles. Its applications are very wide and are not limited to the examples provided.

[0040] The embodiments of this utility model have been described in detail above. Specific examples have been used in this article to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model.

Claims

1. A connector characterized by comprising: The connector comprises: a connector body comprising a connector rubber core and a circuit board arranged on the connector rubber core; an inner protective part encapsulated on the circuit board; a middle protective layer encapsulated on the inner protective part and one end of the connector rubber core close to the circuit board; and an outer protective layer encapsulated on the middle protective layer and one end of the connector rubber core close to the circuit board; the material thermal deformation temperature of the inner protective part is less than that of the middle protective layer, and the material thermal deformation temperature of the middle protective layer is less than that of the outer protective layer.

2. The connector of claim 1, wherein The material stress of the inner protective part is less than that of the middle protective layer, and the material stress of the middle protective layer is less than that of the outer protective layer.

3. The connector of claim 1, wherein The connector rubber core comprises connecting parts and plug-in parts at opposite ends thereof, the plug-in parts are provided with plug-in terminals, the circuit board is arranged between the connecting parts and the inner protective part, and the inner protective part abuts against the end face of the connecting part away from the plug-in part.

4. The connector of claim 3, wherein The middle protective layer encapsulates the inner protective part and one end of the connecting part close to the middle protective layer, and the outer protective layer encapsulates the middle protective layer and one end of the connecting part close to the plug-in part.

5. The connector of claim 3, wherein The outer circumferential surface of the connecting part is provided with multiple connecting grooves arranged in the axial direction parallel to the plug-in terminals; the middle protective layer is sealingly encapsulated in the connecting grooves close to the inner protective part, and the outer protective layer is sealingly encapsulated in the connecting grooves away from the inner protective part.

6. The connector of claim 1, wherein First positioning teeth are arranged between the inner protective part and the middle protective layer, and / or second positioning teeth are arranged between the middle protective layer and the outer protective layer.

7. The connector of claim 3, wherein The plug-in part is a circular cylinder, the connecting part is a circular column, one end of the plug-in terminal is accommodated in the circular cylinder, the other end of the plug-in terminal is fixedly connected to the circular column, one end of the circuit board is connected to the end of the circular column away from the circular cylinder, the circuit board deviates from the axis of the circular cylinder, and the plug-in terminal avoids the electronic components on the circuit board in the axial direction thereof.

8. The connector of claim 7, wherein, The outer circumferential surface of the plug-in part is provided with threads, at least one material reducing surface is arranged on the threads, and the material reducing surface penetrates the threads in the axial direction parallel to the circular cylinder.

9. The connector of claim 1, wherein, The inner protective part is silica gel, the middle protective layer is PE plastic material, and the outer protective layer is high-temperature polyamide plastic material.

10. The connector of claim 1, wherein The connector further comprises a soldering cable soldered to the circuit board, and the inner protective part sealingly encapsulates one end of the soldering cable close to the circuit board.

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