Lightning protection filtering electric connector

Abstract

The utility model discloses an anti-thunder filtering electric connector, which comprises a metal shell, an input end contact element, a filtering capacitor, an output end lead, a transient suppression diode and a printed board, and is characterized in that the filtering capacitor is a plate-type capacitor which is arranged in the metal shell; the plurality of input end contacts respectively pass through a plurality of inner electrode through holes of the plate-type capacitor and a plurality of corresponding through holes on the printed board, the plurality of transient suppression diodes are respectively installed on the printed board, and one ends of the transient suppression diodes are respectively in conductive connection with the plurality of input end contacts. The other ends of the plurality of transient suppression diodes are respectively and conductively connected with the inner wall of the metal shell, and the inner ends of the plurality of input end contacts are respectively and conductively connected with the inner ends of the plurality of output end leads. The utility model has the functions of filtering, lightning protection and electric connection at the same time, the product integration level is very high, the volume and the weight are reduced, a lightning protection circuit module does not need to be added in a post-stage circuit module during application, the design and the production of the whole machine are facilitated, and the production efficiency of the whole machine is improved.

Description

Technical Field

[0001] This utility model relates to an electrical connector with multiple functions, and more particularly to a lightning protection and filtering electrical connector. Background Technology

[0002] With the rapid development of science and technology and the widespread application of various information and electronic products, electromagnetic pollution is becoming increasingly serious. The growing electromagnetic interference (EMI) not only damages or reduces the specifications and performance of electronic equipment, but also poses a certain threat to human health. For a system, various EMIs are most severe at the interface, which is the "window" through which EMI enters and exits electrical and electronic equipment. Therefore, electrical connectors with filtering functions, i.e., filtered electrical connectors, best meet the electromagnetic compatibility requirements of electronic products and can minimize the impact of electromagnetic interference on electronic products.

[0003] Traditional filter connectors have filtering capabilities, which can meet general application requirements, such as filtering power lines and signal lines. However, in some specific applications, such as airborne equipment, lightning protection is often required. Because traditional filter connectors do not have lightning protection, a lightning protection circuit module needs to be added to the subsequent circuit module. This not only increases the size and weight of the product, but also requires more circuit modules to be considered in the overall design and manufacturing process, reducing the overall production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a lightning protection filter connector that simultaneously has filtering, lightning protection, and electrical connection functions in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A surge protector and filter connector includes a metal housing, input contacts, a filter capacitor, and output leads. It also includes transient suppression diodes and a printed circuit board. The filter capacitor is a plate capacitor mounted inside the metal housing with its edge conductively connected to the inner wall of the metal housing. Multiple input contacts pass through multiple internal electrode through-holes in the plate capacitor and multiple corresponding through-holes on the printed circuit board. Multiple transient suppression diodes are mounted on the printed circuit board, with one end conductively connected to a corresponding input contact via a printed line. The other end of each transient suppression diode is conductively connected to the inner wall of the metal housing via a printed line. The inner ends of the input contacts are conductively connected to the inner ends of corresponding output leads via wires. The outer ends of the output leads pass through the metal housing and are located outside the metal housing. The aforementioned input terminal contacts are generally pins, but can also be sockets; the aforementioned output terminal leads are generally metal terminals, but can also be cables; the aforementioned transient voltage suppressor diode, i.e., TVS diode, is an overvoltage protection device with bidirectional voltage regulation and bidirectional negative resistance characteristics, similar to a varistor. It can be unidirectional or bidirectional. If it is a bidirectional TVS diode, the connection method is not divided into two poles. If it is a unidirectional TVS diode, its positive terminal is conductively connected to the input terminal contact, and its negative terminal is conductively connected to the inner wall of the metal casing; the aforementioned plate capacitor is also called a ceramic array plate capacitor, plate feedthrough (ceramic) capacitor, plate filter (ceramic) capacitor, etc. Its basic structure is that there are multiple capacitor through holes on the dielectric (generally ceramic, so it is called ceramic) plate, and an internal electrode paste layer is provided on the hole wall to form the internal electrode through hole. A resistive paste layer is provided on the dielectric plate and grounded. When the voltage on the input terminal contact is normal, the TVS diode is in the open state. When the voltage on the input terminal contact is high due to lightning, the TVS diode is in the conducting state, thereby realizing the lightning protection function.

[0007] Preferably, in order to simultaneously filter and protect the power lines and signal lines from lightning strikes and eliminate common-mode interference between the two power lines, the input contacts include two power input contacts and multiple signal input contacts; the output leads include two power output leads and multiple signal output leads; the lightning protection filter connector also includes a common-mode inductor housed within the metal housing; the inner ends of the two power input contacts are respectively connected to one end of the two inductor coils of the common-mode inductor via wires; the other ends of the two inductor coils of the common-mode inductor are respectively electrically connected to the inner ends of the two power output leads via wires; and the inner ends of the multiple signal input contacts are respectively electrically connected to the inner ends of the corresponding multiple signal output leads via wires.

[0008] Preferably, for ease of processing and assembly, the metal housing includes a first housing and a second housing connected to each other. The plate capacitor is installed in the first housing. Multiple input terminal contacts are located in both the first housing and the second housing. The printed circuit board, multiple transient suppression diodes and the common mode inductor are all placed in the second housing. Multiple output terminal leads are all provided on the second housing.

[0009] Preferably, in order to reliably position the components inside the housing and maintain good insulation performance, the edge of the plate capacitor is bonded to the inner wall of the metal housing with conductive silver paste, the first housing is filled with silicone rubber and epoxy resin in sequence at the positions other than the two sides of the plate capacitor, and the second housing is filled with thermally conductive insulating adhesive.

[0010] Preferably, in order to facilitate a reliable connection between the first housing and the second housing, one end of the first housing is provided with a connecting flange, which is welded to one end of the second housing, and the other end of the second housing is open and welded to a cover plate.

[0011] Preferably, in order to further improve the installation stability of the input terminal contacts, the plate capacitor is close to the connecting flange, and an insulating mounting plate is installed in the middle section of the first housing away from the connecting flange, and the plurality of input terminal contacts pass through the corresponding through holes on the insulating mounting plate.

[0012] Preferably, in order to further improve the sealing performance of the input terminal contacts, a sealing body is provided on the side of the insulating mounting plate away from the plate capacitor inside the first housing. The multiple input terminal contacts pass through corresponding through holes on the sealing body, and a sealing ring is provided between the outer circumferential wall of the sealing body and the inner wall of the first housing.

[0013] Preferably, in order to facilitate reliable conductive connection with the grounding component during application, a conductive liner is fitted on the outer circumferential wall of the first housing near the connecting flange.

[0014] Preferably, in order to more reliably position the input terminal contact, the input terminal contact is electrically connected to the wall of the corresponding inner electrode through hole of the plate capacitor via a claw spring.

[0015] Preferably, in order to reliably connect the input terminal contacts and the wires and protect the connection points, the inner ends of the plurality of input terminal contacts are connected to the corresponding wires by solder, and the connection points are covered with heat shrink tubing.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention, by adding transient suppression diodes and printed circuit boards, and using plate capacitors as filter capacitors, facilitates filtering and lightning protection functions for multiple input terminal contacts within a metal housing. This allows the electrical connector to simultaneously perform filtering, lightning protection, and electrical connection functions. Moreover, the product has a high degree of integration, which helps reduce size and weight. In application, there is no need to add a lightning protection circuit module in the subsequent circuit module, which is beneficial for the overall design and production, and improves the overall production efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of the lightning protection filter electrical connector described in this utility model;

[0019] Figure 2 This is a front sectional view of the lightning protection filter connector described in this utility model;

[0020] Figure 3 This is a circuit diagram of the lightning protection and filtering electrical connector described in this utility model, corresponding to the filtering and lightning protection functions. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figure 1-Figure 3 As shown, the surge protection filter connector of this utility model includes a metal housing (refer to the first housing 3 and the second housing 1 below), input contacts 15, a filter capacitor, output leads (refer to the power output lead 8 and the signal output lead 5 below), transient suppression diodes 17, and a printed circuit board 11. The filter capacitor is a plate capacitor 19, which is installed inside the metal housing and its edge is electrically connected to the inner wall of the metal housing. Multiple input contacts 15 pass through multiple internal electrode through holes of the plate capacitor 19 and multiple corresponding through holes on the printed circuit board 11. Multiple transient suppression diodes... The tubes 17 are respectively mounted on the printed circuit board 11, and one end of each tube is electrically connected to a plurality of corresponding input terminal contacts 15 through printed lines. The other ends of the plurality of transient suppression diodes 17 are electrically connected to the inner wall of the metal housing through printed lines. The inner ends of the plurality of input terminal contacts 15 are electrically connected to the inner ends of a plurality of corresponding output terminal leads through wires 10 (here, wires 10 are wires with insulating jackets, and wires 10 in different positions use the same marking name, the same below). The outer ends of the plurality of output terminal leads pass through the metal housing and are placed outside the metal housing.

[0023] like Figure 1-Figure 3 As shown, this utility model also discloses the following more optimized specific structures:

[0024] To simultaneously filter and protect the power and signal lines and eliminate common-mode interference between the two power lines, the input contact 15 includes two power input contacts (not separately marked in the figure) and multiple signal input contacts (not separately marked in the figure). The output leads include two power output leads 8 and multiple signal output leads 5. The surge protection filter connector also includes a common-mode inductor 9 housed within the metal housing. The inner ends of the two power input contacts are connected to one end of the two inductor coils of the common-mode inductor 9 via wires 10. The other ends of the two inductor coils of the common-mode inductor 9 are electrically connected to the inner ends of the two power output leads 8 via wires. The inner ends of the multiple signal input contacts are electrically connected to the inner ends of the multiple corresponding signal output leads 5 via wires.

[0025] For ease of processing and assembly, the metal housing includes a first housing 3 and a second housing 1 that are interconnected. A plate capacitor 19 is installed in the first housing 3. Multiple input terminal contacts 15 are located in both the first housing 3 and the second housing 1. A printed circuit board 11, multiple transient suppression diodes 17 and a common mode inductor 9 are all placed in the second housing 1. Multiple output terminal leads are all located on the second housing 1.

[0026] In order to reliably position the components inside the housing and maintain good insulation performance, the edge of the plate capacitor 19 is bonded to the inner wall of the metal housing with conductive silver paste. The first housing 3 is filled with silicone rubber 18 and epoxy resin 16 in sequence at the positions other than the two sides of the plate capacitor 19, and the second housing 1 is filled with thermally conductive insulating adhesive 14.

[0027] To facilitate a reliable connection between the first housing 3 and the second housing 1, a connecting flange 2 is provided at one end of the first housing 3. The connecting flange 2 is welded to one end of the second housing 1, and the other end of the second housing 1 is open and welded to the cover plate 7.

[0028] To further improve the installation stability of the input terminal contact 15, the plate capacitor 19 is close to the connecting flange 2, and an insulating mounting plate 21 is installed in the middle section of the first housing 3 away from the connecting flange 2. Multiple input terminal contacts 15 pass through corresponding through holes on the insulating mounting plate 21.

[0029] To further improve the sealing performance of the input terminal contact 15, a sealing body 22 is provided on the side of the first housing 3 located away from the plate capacitor 19 in the insulating mounting plate 21. Multiple input terminal contacts 15 pass through corresponding through holes on the sealing body 22. A sealing ring 23 is provided between the outer circumferential wall of the sealing body 22 and the inner wall of the first housing 3.

[0030] To facilitate reliable conductive connection with grounding components during application, a conductive liner 4 is fitted on the outer circumferential wall of the first housing 3 near the connecting flange 2.

[0031] To ensure more reliable positioning of the input contact 15, the input contact 15 is electrically connected to the wall of the corresponding inner electrode through hole of the plate capacitor 19 via a claw spring 20.

[0032] In order to reliably connect the input terminal contact 15 and the wire 10 and protect the connection, the inner ends of multiple input terminal contacts 15 are connected to the corresponding wires 10 by solder 12, and the connection position is covered with heat shrink tubing 13.

[0033] Figure 1 and Figure 2 The diagram also shows an insulator 5 disposed on the outer wall of the second housing 1, used to isolate the output lead from the second housing 1; Figure 3 The diagram only shows the circuit structure corresponding to one signal line, omitting the circuit structures corresponding to other signal lines.

[0034] like Figure 1-Figure 3 As shown, in application, multiple input terminal contacts 15 are plugged into the corresponding connectors (such as sockets or plugs, not shown in the figure) of the power supply and signal source, and multiple output terminal leads are connected to the electrical equipment (not shown in the figure). During normal operation, the multiple input terminal contacts 15 corresponding to the DC power supply and signal source are first filtered by the plate capacitor 19 to remove interference electromagnetic waves. The two input terminal contacts 15 corresponding to the DC power supply are filtered by the common-mode inductor 9 to remove the common-mode interference generated between the two power lines. Then, the two power output terminals are connected to the leads 8 to supply power to the electrical equipment. The multiple input terminal contacts 15 corresponding to the signal source provide relevant electrical signals to the electrical equipment through multiple signal output terminals 5. When affected by lightning, when the high-energy lightning impact arrives, the transient suppression diode 17 is the first to act, conducts to ground, and discharges the high energy of the transient pulse to reach the design-required limiting voltage, thereby effectively protecting the back-end drive control circuit. After the lightning impact is eliminated, the transient suppression diode 17 returns to normal and is in the open state, without affecting the normal operation of the electrical equipment.

[0035] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A surge protector and filter connector, comprising a metal housing, input contacts, a filter capacitor, and output leads, characterized in that: It also includes transient suppression diodes and a printed circuit board. The filter capacitor is a plate capacitor, which is installed inside the metal housing and its edge is conductively connected to the inner wall of the metal housing. Multiple input terminal contacts pass through multiple internal electrode through holes of the plate capacitor and multiple corresponding through holes on the printed circuit board. Multiple transient suppression diodes are installed on the printed circuit board, and one end of each diode is conductively connected to a corresponding input terminal contact through a printed line. The other end of each diode is conductively connected to the inner wall of the metal housing through a printed line. The inner ends of each input terminal contact are conductively connected to the inner ends of a corresponding output terminal lead through wires. The outer ends of each output terminal lead pass through the metal housing and are located outside the metal housing.

2. The surge protection filter connector according to claim 1, characterized in that: The input contacts include two power input contacts and multiple signal input contacts. The output leads include two power output leads and multiple signal output leads. The surge protection filter connector also includes a common-mode inductor housed within the metal housing. The inner ends of the two power input contacts are connected to one end of the two inductor coils of the common-mode inductor via wires. The other ends of the two inductor coils of the common-mode inductor are electrically connected to the inner ends of the two power output leads via wires. The inner ends of the multiple signal input contacts are electrically connected to the inner ends of the corresponding multiple signal output leads via wires.

3. The surge protection filter connector according to claim 2, characterized in that: The metal housing includes a first housing and a second housing that are connected to each other. The plate capacitor is installed in the first housing. Multiple input terminal contacts are located in both the first housing and the second housing. The printed circuit board, multiple transient suppression diodes and the common mode inductor are all placed in the second housing. Multiple output terminal leads are all provided on the second housing.

4. The surge protection filter connector according to claim 3, characterized in that: The edge of the plate capacitor is bonded to the inner wall of the metal casing with conductive silver paste. The first casing is filled with silicone rubber and epoxy resin in sequence at the positions other than the two sides of the plate capacitor. The second casing is filled with thermally conductive insulating adhesive.

5. The surge protection filter connector according to claim 3 or 4, characterized in that: One end of the first housing is provided with a connecting flange, which is welded to one end of the second housing. The other end of the second housing is open and welded to a cover plate.

6. The surge protection filter connector according to claim 5, characterized in that: The plate capacitor is located near the connecting flange. An insulating mounting plate is installed in the middle section of the first housing away from the connecting flange. Multiple input terminal contacts pass through corresponding through holes on the insulating mounting plate.

7. The surge protection filter connector according to claim 6, characterized in that: A sealing body is provided inside the first housing on the side of the insulating mounting plate away from the plate capacitor. Multiple input terminal contacts pass through corresponding through holes on the sealing body. A sealing ring is provided between the outer circumferential wall of the sealing body and the inner wall of the first housing.

8. The surge protection filter connector according to claim 5, characterized in that: A conductive liner is fitted on the outer circumferential wall of the first housing near the connecting flange.

9. The surge protection filter connector according to any one of claims 1-4, characterized in that: The input terminal contact is electrically connected to the wall of the corresponding internal electrode through hole of the plate capacitor via a claw spring.

10. The surge protection filter connector according to any one of claims 1-4, characterized in that: The inner ends of the plurality of input terminal contacts are connected to the corresponding wires by solder, and the connection positions are covered with heat shrink tubing.

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