Composite DC plug for anti-electromagnetic interference

Abstract

This utility model relates to the field of DC plug technology, specifically to a composite DC plug for electromagnetic interference suppression, comprising a housing; a plug-in opening; a receiving cavity inside the housing; a plug-in terminal assembly at the plug-in opening; the housing includes an insulating layer, a first shielding layer, and a second shielding layer; the first shielding layer covers the second shielding layer; the insulating layer covers the first shielding layer; a magnetic ring is provided on the inner wall of the receiving cavity; the receiving cavity contains a positive cable and a negative cable; the positive cable and the negative cable are respectively connected to the plug-in terminal assembly. This utility model, by setting the housing as a three-layer composite structure of an insulating layer, a first shielding layer, and a second shielding layer, can achieve sufficient strength while providing dual shielding against magnetic and electric field interference; furthermore, by providing a magnetic ring outside the positive and negative cables, it can strongly suppress high-frequency electromagnetic interference and absorb and dissipate the energy of high-frequency interference signals.

Description

Technical Field

[0001] This utility model relates to the field of DC plug technology, specifically to a composite DC plug for electromagnetic interference suppression. Background Technology

[0002] In the field of modern electronic devices, DC plugs, as a key component for power connection, are widely used in various terminal devices such as laptops, tablets, and chargers. As electronic devices become increasingly complex, the requirements for power connection stability and signal purity continue to rise, gradually exposing the technological shortcomings of traditional composite DC plugs.

[0003] Currently, traditional composite DC plugs suffer from weak electromagnetic interference resistance due to limitations in structural design, shielding material selection, and processing technology. In practical applications, the complex electromagnetic environment can easily interfere with the electrical signals transmitted by the DC plug, leading to unstable power transmission, signal distortion, and even equipment crashes and data loss. This not only reduces the user experience but also limits the application expansion of electronic devices in complex electromagnetic environments. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a composite DC plug for electromagnetic interference suppression.

[0005] The objective of this utility model is achieved through the following technical solution: a composite DC plug for electromagnetic interference suppression, comprising a housing; one end of the housing is provided with a plug-in opening; a receiving cavity is provided inside the housing; and a plug-in terminal assembly is provided at the plug-in opening;

[0006] The housing includes an insulating layer, a first shielding layer, and a second shielding layer; the first shielding layer covers the outside of the second shielding layer; the insulating layer covers the outside of the first shielding layer;

[0007] The inner wall of the accommodating cavity is provided with a magnetic ring; the accommodating cavity is provided with a positive cable and a negative cable; the positive cable and the negative cable respectively protrude from the plug-in opening and are connected to the plug-in terminal assembly.

[0008] The present invention is further configured such that the magnetic ring is embedded in the inner wall of the accommodating cavity.

[0009] The present invention is further configured such that the material of the insulating layer is polyphenylene sulfide.

[0010] The present invention is further configured such that the material of the first shielding layer is permalloy.

[0011] The present invention is further configured such that the material of the second shielding layer is copper.

[0012] The present invention is further configured such that the positive cable and the negative cable are twisted together.

[0013] The present invention is further configured such that a metal braided mesh is provided on the outer casing of the positive electrode cable and the outer casing of the negative electrode cable.

[0014] The present invention is further provided that one end of the housing is provided with an elastic shielding contact ring.

[0015] The present invention is further provided that the elastic shielding contact ring has a groove in the middle.

[0016] The present invention is further configured such that the housing is provided with a spring pin; the spring pin is connected to the first shielding layer.

[0017] The beneficial effects of this utility model are as follows: By setting the shell as a three-layer composite structure consisting of an insulating layer, a first shielding layer, and a second shielding layer, this utility model can achieve dual shielding against magnetic field and electric field interference while having sufficient strength; in addition, by setting magnetic rings outside the positive and negative cables, it can have a strong suppression effect on high-frequency electromagnetic interference and can absorb and consume the energy of high-frequency interference signals. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention;

[0019] Among them: 1. Insertion opening; 11. Insertion terminal assembly; 2. Receiving cavity; 21. Magnetic ring; 31. Insulation layer; 32. First shielding layer; 33. Second shielding layer; 41. Positive cable; 42. Negative cable; 43. Metal braided mesh; 5. Elastic shielding contact ring; 51. Groove; 6. Spring pin. Detailed Implementation

[0020] The present invention will be further described in conjunction with the following embodiments.

[0021] Depend on Figure 1 As can be seen, the composite DC plug for electromagnetic interference suppression described in this embodiment includes a housing; one end of the housing is provided with a plug-in opening 1; the housing is provided with a receiving cavity 2; a plug-in terminal assembly 11 is provided at the plug-in opening 1; the housing includes an insulating layer 31, a first shielding layer 32 and a second shielding layer 33; the first shielding layer 32 covers the second shielding layer 33; the insulating layer 31 covers the first shielding layer 32; a magnetic ring 21 is provided on the inner wall of the receiving cavity 2; the receiving cavity 2 is provided with a positive cable 41 and a negative cable 42; the positive cable 41 and the negative cable 42 respectively protrude from the plug-in opening 1 and are connected to the plug-in terminal assembly 11.

[0022] The composite DC plug for electromagnetic interference suppression described in this embodiment uses polyphenylene sulfide (PPS) as the material for the insulating layer 31. The use of PPS as the insulating layer 31 gives the composite DC plug for electromagnetic interference suppression excellent electrical insulation properties, maintaining stability even in high temperature and high humidity environments. It also features low dielectric constant and dielectric loss, as well as high rigidity.

[0023] The composite DC plug for electromagnetic interference suppression described in this embodiment uses permalloy as the material for the first shielding layer 32. The use of permalloy as the material for the first shielding layer 32 gives it extremely high magnetic permeability, effectively guiding and shielding against external magnetic field interference.

[0024] In this embodiment, a composite DC plug for electromagnetic interference suppression is described, wherein the second shielding layer 33 is made of copper. The copper material of the second shielding layer 33 has good electrical conductivity and can also be used to shield against electric field interference.

[0025] The composite DC plug for electromagnetic interference suppression described in this embodiment has a three-layer composite structure consisting of an insulating layer 31, a first shielding layer 32, and a second shielding layer 33. This structure provides sufficient strength while achieving dual shielding against magnetic and electric field interference. Furthermore, by setting a magnetic ring 21 outside the positive cable 41 and the negative cable 42, it has a strong suppression effect on high-frequency electromagnetic interference and can absorb and dissipate the energy of high-frequency interference signals.

[0026] This embodiment describes a composite DC plug for electromagnetic interference suppression, in which the magnetic ring 21 is embedded in the inner wall of the accommodating cavity 2. This configuration ensures a stable and reliable overall structure for the composite DC plug for electromagnetic interference suppression.

[0027] This embodiment describes a composite DC plug for electromagnetic interference suppression, in which the positive cable 41 and the negative cable 42 are twisted together. By twisting the positive cable 41 and the negative cable 42, this embodiment can reduce interference caused by electromagnetic coupling between the lines.

[0028] This embodiment describes a composite DC plug for electromagnetic interference suppression, in which the positive cable 41 and the negative cable 42 are covered with a metal braided mesh 43. This design effectively suppresses electromagnetic radiation generated during internal signal transmission and interference from external electromagnetic signals to the internal circuitry.

[0029] This embodiment describes a composite DC plug for electromagnetic interference suppression, wherein one end of the housing is provided with an elastic shielding contact ring 5. This elastic shielding contact ring 5 is made of highly elastic conductive rubber material. When the composite DC plug for electromagnetic interference suppression is inserted into the corresponding socket of the device, the elastic shielding contact ring 5 can tightly fit against the metal shell of the socket, forming a good electrical connection, further enhancing the electromagnetic shielding effect between the plug and the socket, and preventing electromagnetic interference from leaking or intruding from the connection interface.

[0030] This embodiment describes a composite DC plug for electromagnetic interference suppression, in which a groove 51 is provided in the middle of the elastic shielding contact ring 5. This design strengthens the connection between the plug and the socket.

[0031] This embodiment describes a composite DC plug for electromagnetic interference suppression, wherein the housing is provided with a spring-loaded pin 6; the spring-loaded pin 6 is connected to the first shielding layer 32. Through this configuration, when the composite DC plug for electromagnetic interference suppression is inserted into the socket, the spring-loaded pin 6 can automatically connect to the grounding terminal of the socket, maintaining a good electrical connection with the grounding terminal of the socket, thereby quickly conducting the induced electromagnetic interference current on the housing to the ground, further enhancing the electromagnetic interference suppression capability.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A composite DC plug for electromagnetic interference suppression, characterized in that: Includes a housing; one end of the housing is provided with a plug-in opening (1); the housing is provided with a receiving cavity (2); a plug-in terminal assembly (11) is provided at the plug-in opening (1); The housing includes an insulating layer (31), a first shielding layer (32), and a second shielding layer (33); the first shielding layer (32) covers the second shielding layer (33); the insulating layer (31) covers the first shielding layer (32). The inner wall of the accommodating cavity (2) is provided with a magnetic ring (21); the accommodating cavity (2) is provided with a positive cable (41) and a negative cable (42); the positive cable (41) and the negative cable (42) respectively protrude from the plug-in opening (1) and are connected to the plug-in terminal assembly (11).

2. The composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The magnetic ring (21) is embedded in the inner wall of the accommodating cavity (2).

3. The composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The insulating layer (31) is made of polyphenylene sulfide.

4. The composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The material of the first shielding layer (32) is permalloy.

5. A composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The material of the second shielding layer (33) is copper.

6. A composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The positive cable (41) and the negative cable (42) are twisted together.

7. A composite DC plug for electromagnetic interference suppression according to claim 6, characterized in that: The positive electrode cable (41) and the negative electrode cable (42) are covered with a metal braided mesh (43).

8. A composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: One end of the housing is provided with an elastic shielding contact ring (5).

9. A composite DC plug for electromagnetic interference suppression according to claim 8, characterized in that: The elastic shielding contact ring (5) has a groove (51) in the middle.

10. A composite DC plug for electromagnetic interference suppression according to claim 1, characterized in that: The housing is provided with a spring pin (6); the spring pin (6) is connected to the first shielding layer (32).

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