CN115642890A - filter - Google Patents

Abstract

The application provides a filter, which comprises a shell, a PCB (printed circuit board) feedthrough capacitor, a PCB assembly, a first guide pin and a second guide pin, wherein the shell is provided with a positive input port, a negative input port, a positive output port and a negative output port; the PCB feedthrough capacitor is arranged in the shell and is integrated on the first PCB; the PCB assembly is arranged in the shell and comprises a second PCB and a patch ceramic capacitor arranged on the second PCB; the first guide pin is electrically connected with the second PCB, and magnetic beads are respectively arranged at two ends of the first guide pin in a penetrating manner and penetrate through the positive input port and the positive output port; the second guide pin is electrically connected with the PCB feedthrough capacitor, one end of the second guide pin penetrates through a magnetic bead and penetrates through the negative input port, and the other end of the second guide pin penetrates through the negative output port. The problem that short circuit became invalid easily appears in ceramic feedthrough capacitor among the wave filter that exists among the prior art is solved in this application.

Description

filter

technical field

The present application relates to the field of filters, in particular to a filter.

Background technique

A filter is a device used to eliminate interfering noise signals, and is a circuit element used to effectively filter out a specific frequency band or frequencies outside the frequency band. For filters operating in the 10KHz-1GHz frequency range, ceramic feedthrough capacitors are usually used directly to achieve low insertion loss. However, ceramic feedthrough capacitors in this filter are prone to short-circuit failure.

Contents of the invention

The embodiment of the present application provides a filter, which solves the problem in the prior art that the ceramic feedthrough capacitors in the filter are prone to short-circuit failure.

The present invention is realized in this way, a filter includes a shell, a PCB feedthrough capacitor, a PCB assembly, a first guide pin and a second guide pin, and the shell has a positive input port, a negative input port, a positive output port and a negative output port The PCB feedthrough capacitor is located in the shell, and the PCB feedthrough capacitor is a feedthrough capacitor integrated on the first PCB board; the PCB assembly is located in the shell, and the PCB assembly includes the second PCB board and SMD ceramic capacitors arranged on the second PCB board; the first guide pin is electrically connected to the second PCB board, and the two ends of the first guide pin are respectively pierced with magnetic beads and pass through the positive An input port and a positive output port; the second guide pin is electrically connected to the PCB feedthrough capacitor, one end of the second guide pin is pierced with a magnetic bead and passes through the negative input port, and the other end passes through the negative output port.

In one embodiment, the first PCB board is a multi-layer printed circuit board, and the multi-layer printed circuit board forms the feedthrough capacitor.

In one of the embodiments, the first guide pin includes a first guide pin segment and a second guide pin segment electrically connected to the second PCB board, the first guide pin segment is pierced with a magnetic bead and Through the positive input port, the second guide pin section is pierced with magnetic beads and passes through the positive output port; the second guide pin includes a third guide pin electrically connected to the PCB feedthrough capacitor A needle segment and a fourth guide needle segment, the third guide needle segment is threaded with magnetic beads and passes through the negative input port, and the fourth guide needle segment passes through the negative output port.

In one of the embodiments, the filter further includes a first connection guide pin and a second connection guide pin. The second guide pin segment is located at one end of the housing; the two ends of the second connecting guide pin are respectively connected to the end of the third guide pin segment located in the housing and the fourth guide pin segment is located at an end within the housing;

The material of the first connecting guide pin and the second connecting guide pin is silver.

In one of the embodiments, a first conductive hole and a first through hole are opened on the second PCB, and a second conductive hole and a second through hole are opened on the PCB feedthrough capacitor; Both the needle segment and the third guide pin segment pass through the first conductive hole and the second through hole, the first guide pin segment passes through the housing from the positive input port, and the third The guide pin segment passes through the housing from the negative input port; the second guide pin segment and the fourth guide pin segment pass through the first through hole and the second conductive hole, and the first guide pin segment passes through the first through hole and the second conductive hole. The second guide pin section passes through the housing through the positive output port, and the fourth guide pin segment passes through the housing through the negative output port.

In one of the embodiments, the fourth guide pin segment is welded together with the negative output port;

The PCB feedthrough capacitor has a ground electrode connected to the fourth guide pin segment, and the PCB feedthrough capacitor has one side surface of the ground electrode connected to the shell.

In one of the embodiments, the second PCB board is arranged in parallel with the PCB feedthrough capacitor, and the side surface of the chip ceramic capacitor installed on the second PCB board faces the PCB feedthrough capacitor;

The magnetic beads are located between the second PCB board and the PCB feedthrough capacitor.

In one of the embodiments, the first guide needle segment, the second guide needle segment, the third guide needle segment and the fourth guide needle segment are parallel to each other, and the first guide needle segment is vertical on the second PCB board;

The positive input port, the negative input port, the positive output port and the negative output port are arranged in a square shape.

In one embodiment, the material of the first guide pin, the second guide pin and the shell is the same.

In one of the embodiments, the casing is filled with cured glue.

The beneficial effect of the filter provided by this application is that compared with the prior art, this application integrates the feedthrough capacitor on the first PCB board, and arranges chip ceramic capacitors on the second PCB board, which can avoid directly using ceramic feedthrough capacitors. Capacitor short-circuit failure caused by heart capacitance, and can meet the requirements of low insertion loss.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a three-dimensional structure of a filter provided in an embodiment of the present application;

Fig. 2 is the circuit principle diagram of the filter provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of the internal structure of the filter provided by the embodiment of the present application;

4 is a schematic diagram of the overall structure of the PCB feedthrough capacitor of the filter provided by the embodiment of the present application;

Figure 5-1 is a schematic diagram of the first layer of the printed circuit board of the first PCB board integrated with the feedthrough capacitance of the filter provided by the embodiment of the present application;

Fig. 5-2 is a schematic diagram of the second layer of the printed circuit board of the first PCB integrated with the feedthrough capacitor of the filter provided by the embodiment of the present application;

Fig. 5-3 is a schematic diagram of the third layer of the printed circuit board of the first PCB board integrated with the feedthrough capacitance of the filter provided by the embodiment of the present application;

Figure 5-4 is a schematic diagram of the fourth layer of the printed circuit board of the first PCB board integrated with the feedthrough capacitor of the filter provided by the embodiment of the present application;

Figure 5-5 is a schematic diagram of the fifth layer of the printed circuit board of the first PCB board integrated with the feedthrough capacitance of the filter provided by the embodiment of the present application;

5-6 are schematic diagrams of the sixth-layer printed circuit board of the first PCB board integrated with the feedthrough capacitance of the filter provided by the embodiment of the present application;

5-7 are schematic diagrams of the seventh-layer printed circuit board of the first PCB board integrated with the feedthrough capacitance of the filter provided by the embodiment of the present application;

5-8 are schematic diagrams of the eighth-layer printed circuit board of the first PCB board integrated with feedthrough capacitors of the filter provided by the embodiment of the present application;

FIG. 6 is a schematic front view of the PCB assembly of the filter provided by the embodiment of the present application;

FIG. 7 is a schematic diagram of the back of the PCB assembly of the filter provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of soldering a first connection guide pin and a second connection guide pin on a PCB assembly of a filter provided by an embodiment of the present application.

Reference signs:

10. Shell; 11. Positive input port; 12. Negative input port; 13. Positive output port; 14. Negative output port;

20. PCB feedthrough capacitor; 21. The first PCB board; 201. The second conductive hole; 202. The second through hole;

30. PCB assembly; 31. The second PCB board; 32. SMD ceramic capacitor; 311. The first conductive hole; 312. The first through hole;

40. The first guide pin; 41. The first guide pin segment; 42. The second guide pin segment; 43. The first connecting guide pin;

50. The second guide pin; 51. The third guide pin segment; 52. The fourth guide pin segment; 53. The second connecting guide pin;

60. Magnetic beads;

70. Curing glue.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying No device or element must have a particular orientation, be constructed, and operate in a particular orientation, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

It should also be noted that, in the embodiment of the present application, the same component or the same component is represented by the same reference numeral, and for the same component in the embodiment of the present application, only one of the parts or components may be marked as an example in the figure It should be understood that, for other identical parts or components, the reference signs are also applicable.

For convenience of description, the concrete instructions of using English among the present invention are as follows:

PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board, also known as PCB board.

The embodiment of the present application provides a filter, which solves the problem in the prior art that the ceramic feedthrough capacitors in the filter are prone to short-circuit failure.

Please refer to FIG. 1 and FIG. 3 together. The filter provided by the embodiment of the present application includes a housing 10 , a PCB feedthrough capacitor 20 , a PCB assembly 30 , a first guide pin 40 and a second guide pin 50 . Wherein, there is accommodating space in the shell 10, in order to accommodate electronic devices, the shell 10 has a positive input port 11, a negative input port 12, a positive output port 13 and a negative output port 14; PCB feedthrough capacitor 20 and PCB assembly 30 are arranged on The housing 10 is used to support and protect the PCB feedthrough capacitor 20 and the PCB assembly 30 through the housing 10 . The PCB feedthrough capacitor 20 is a feedthrough capacitor integrated on the first PCB board 21; it is arranged in the housing 10, and the PCB assembly 30 includes a second PCB board 31 and a patch ceramic capacitor 32 arranged on the second PCB board 31; The feedthrough capacitor is integrated in the first PCB board 21 to avoid a short circuit of the feedthrough capacitor, and at the same time, a patch ceramic capacitor 32 is installed on the second PCB board 31 to adjust the capacitance and capacitance characteristics. The first guide pin 40 and The second PCB board 31 is electrically connected, and the two ends of the first guide pin 40 are respectively pierced with magnetic beads 60 and pass through the positive input port 11 and the positive output port 13; One end of the two guide pins 50 is pierced with a magnetic bead 60 and passes through the negative input port 12, and the other end passes through the negative output port 14, so that the filter can reach the insertion loss index of the ceramic feedthrough capacitor, that is, achieve low insertion loss , and avoid short circuit, which can better avoid filter failure.

Referring to FIG. 2 , FIG. 2 is a schematic circuit diagram of a filter according to an embodiment of the present application. It can be seen from FIG. 2 that pin 1 in FIG. 2 corresponds to one end of the first guide pin 40 passing through the positive input port 11, pin 2 corresponds to one end of the first guide pin 40 passing through the positive output port 13, and pin 3 corresponds to the end of the first guide pin 40 passing through the positive output port 13. Corresponding to one end of the second guide pin 50 passing through the negative input port 12, 4 pins correspond to one end of the second guide pin 50 passing through the negative output port 14, the inductance in Figure 2 corresponds to the magnetic bead 60, and the 1 pin in Figure 2 The connection line between pin 2 and pin 2 corresponds to the first guide pin 40, the connection line between pin 3 and pin 4 corresponds to the second guide pin 50, and the capacitors in FIG. 2 are respectively integrated in the first PCB board 21 Feedthrough capacitors and chip ceramic capacitors 32 installed on the second PCB 31 .

According to the filter provided by the embodiment of the present application, compared with the prior art, the present application integrates the feedthrough capacitor on the first PCB board 21, and arranges the chip ceramic capacitor 32 on the second PCB board 31, which can avoid direct use The capacitor short-circuit failure problem caused by ceramic feedthrough capacitors can meet the requirements of low insertion loss at the same time.

Further, referring to FIG. 4 , the first PCB board 21 is a multilayer printed circuit board, and the multilayer printed circuit board forms a feedthrough capacitor. That is, when making a multilayer printed circuit board, that is, when making the first PCB board 21, a feedthrough capacitor is formed at the same time, that is, a printed circuit board is used to make a feedthrough capacitor, so that the feedthrough capacitor is integrated into the first PCB board 21 to avoid short circuits. The integrated feedthrough capacitor in the first PCB board 21 is obtained by PCB technology, which has the advantages of good high-frequency characteristics, strong soldering resistance, no cracking and short circuit under harsh environments (such as strong vibration and strong impact), and high reliability.

Furthermore, as a specific implementation of the filter provided in the embodiment of the application, the printed circuit board has 8 layers. In other embodiments, the printed circuit board may also have 5 layers, 6 layers, 7 layers, etc. number. Specifically, it can be set according to needs; of course, the more layers of the printed circuit board, the greater its capacitance. Please refer to Fig. 5-1 to Fig. 5-8 together. The 8-layer printed circuit board of the first PCB board 21 is stacked according to the stacking sequence of the first layer to the eighth layer from top to bottom as Fig. 5-1 to Fig. 5 -8 shows the graph.

Further, referring to FIG. 1 and FIG. 3 , as a specific implementation of the filter provided in the embodiment of the application, the first guide pin 40 includes a first guide pin section 41 and a second guide pin section 41 electrically connected to the second PCB board 31 . Needle segment 42, the first guide needle segment 41 is threaded with magnetic beads 60 and passes through the positive input port 11, the second guide needle segment 42 is threaded with magnetic beads 60 and passed through the positive output port 13; the second guide needle 50 includes a third guide pin segment 51 and a fourth guide pin segment 52 electrically connected to the PCB feedthrough capacitor 20, the third guide pin segment 51 is pierced with a magnetic bead 60 and passes through the negative input port 12, the fourth guide pin segment Section 52 passes through negative outlet 14 .

It should be noted that the first guide needle segment 41 is set to pass through the positive input port 11 as the positive input end, the second guide needle segment 42 is set to pass through the positive output port 13 as the positive output end, and the third guide needle segment 51 is set to pass through The negative input port 12 is used as a negative input end, and the fourth guide needle segment 52 is set to pass through the negative output port 14 as a negative output end. In this way, the positive input terminal, positive output terminal, negative input terminal and negative output terminal of the filter can all be located on the same side, which is convenient for connection and use, and can also well reduce the volume of the filter.

Further, setting the first guide needle segment 41, the second guide needle segment 42, the third guide needle segment 51 and the fourth guide needle segment 52 can also facilitate the penetration of the magnetic beads 60, so that the magnetic beads 60 can be concentratedly distributed, save space.

Further, with reference to FIG. 8 , as a specific implementation of the filter provided in the embodiment of the application, the filter further includes a first connection guide pin 43 and a second connection guide pin 53 , and the two ends of the first connection guide pin 43 are respectively Connect the end of the first guide needle segment 41 located in the housing 10 and the end of the second guide needle segment 42 located in the housing 10; the two ends of the second connecting guide needle 53 are respectively connected to the end of the third guide needle segment 51 located in the housing 10 and the fourth guide pin segment 52 are located at one end of the shell 10; the first connecting guide pin 43 and the second connecting guide pin 53 are made of silver. Since the filter will generate a large amount of heat after long-term use, the temperature of the filter will rise, which will easily affect the normal performance of the electronic components of the filter. On the basis of welding on the second PCB board 31, the first guide pin segment 41 and the second guide pin segment 42 are connected together through the first connecting guide pin 43 of silver material, which can reduce the resistance of the first guide pin 40 and reduce the The generation of heat, at the same time, the third guide pin segment 51 and the fourth guide pin segment 52 are also connected together through the second connecting guide pin 53 of silver material, which can reduce the resistance of the second guide pin 50 and reduce the generation of heat . In this way, by reducing the resistance of the first guide pin 40 and the second guide pin 50, the generation of heat can be reduced, thereby reducing the overall temperature of the filter, reducing the risk of failure of the electronic components of the filter due to high temperature, and improving filter reliability.

Further, please refer to Figure 4, Figure 6-Figure 7 together, as a specific implementation of the filter provided in the embodiment of the application, in order to make the first guide needle segment 41, the second guide needle segment 42, the third guide needle segment The installation of the needle section 51 and the fourth guide needle section 52 in the filter is more convenient and fast. The first conductive hole 311 and the first through hole 312 are opened on the second PCB board 31 of the present application, and the PCB through-hole capacitor 20 is opened. There are second conductive holes 201 and second through holes 202; the first guide pin segment 41 and the third guide pin segment 51 pass through the first conductive hole 311 and the second through hole 202, and the first guide pin segment 41 is input from the positive The port 11 passes through the housing 10, and the third guide pin segment 51 passes through the housing 10 from the negative input port 12, which is equivalent to the first guide pin segment 41 and the third guide pin segment 51 being electrically connected to the second PCB board 31, Instead of being electrically connected to the PCB feedthrough capacitor 20, it just passes through the PCB feedthrough capacitor 20; the second guide pin segment 42 and the fourth guide pin segment 52 both pass through the first through hole 312 and the second conductive hole 201, the second guide needle segment 42 passes through the housing 10 from the positive output port 13, and the fourth guide needle segment 52 passes through the housing 10 from the negative output port 14, which is equivalent to the second guide needle segment 42 and the fourth guide needle segment 52 are all electrically connected to the PCB feedthrough capacitor 20 , but not electrically connected to the second PCB board 31 .

Through the above settings, when the second PCB board 31 and the PCB feedthrough capacitor 20 are in a small space together, it can be well ensured that the first guide pin segment 41 and the third guide pin segment 51 are in contact with the second PCB board 31 Electrically connected, the second guide pin segment 42 and the fourth guide pin segment 52 are electrically connected to the PCB feedthrough capacitor 20, and the first guide pin segment 41, the third guide pin segment 51, and the second guide pin segment 42 may not be bent and the fourth guide pin segment 52, the first guide pin segment 41, the third guide pin segment 51, the second guide pin segment 42 and the fourth guide pin segment 52 can all adopt a straight line structure, which is convenient for installation while saving materials, and then The electronic devices installed in the housing 10 of the filter can be assembled more compactly, and the volume of the filter can be reduced.

Further, referring to FIG. 1 , as a specific implementation of the filter provided in the embodiment of the application, the fourth guide pin segment 52 is welded together with the negative output port 14; since the fourth guide pin segment 52 does not have a magnetic Bead 60, so in order to speed up the assembly efficiency of the filter, the fourth guide pin segment 52 and the negative output port 14 can be welded together, specifically, the fourth guide pin segment 52 and the negative output port 14 can be integrated when the shell 10 is manufactured Made together, in this way it is only necessary to install the first guide needle segment 41, the second guide needle segment 42 and the third guide needle segment 51. The PCB feed-through capacitor 20 has a ground electrode connected to the fourth guide pin segment 52, and the side surface of the PCB feed-through capacitor 20 with the ground electrode is connected to the shell 10, because the end of the fourth guide pin segment 52 located outside the shell 10 will serve as Negative output terminal, so the ground electrode is connected to the fourth guide pin segment 52, and the side surface of the PCB feedthrough capacitor 20 with the ground electrode is connected to the shell 10, which is equivalent to connecting the fourth guide pin segment 52, the ground electrode and the shell 10. After the shells 10 are connected together, the shells 10 can also be used for grounding, which not only increases the grounding area, facilitates grounding, but also reduces insertion loss.

Further, referring to FIG. 3 , as a specific implementation of the filter provided in the embodiment of the application, the second PCB board 31 is arranged in parallel with the PCB feedthrough capacitor 20 , and the chip ceramic capacitor 32 is installed on the second PCB board 31 One side faces the PCB feedthrough capacitor 20 ; the magnetic bead 60 is located between the second PCB board 31 and the PCB feedthrough capacitor 20 . Through the above settings, the patch ceramic capacitors 32 and the magnetic beads 60 can be distributed between the second PCB board 31 and the PCB feedthrough capacitor 20. At the same time, because the second PCB board 31 and the PCB feedthrough capacitor 20 are arranged in parallel, the shell The distribution of the electronic devices arranged in 10 is more compact, and the space utilization is more rationalized, which is beneficial to reducing the volume of the filter and making the manufacture of the filter miniaturized.

Further, please refer to FIG. 1 and FIG. 3 together. As a specific implementation of the filter provided in the embodiment of the application, the first guide needle segment 41, the second guide needle segment 42, the third guide needle segment 51 and the first guide needle segment The four guide pin segments 52 are parallel to each other, and the first guide pin segment 41 is perpendicular to the second PCB board 31; Within the size range of the space formed by the board 31 and the PCB feedthrough capacitor 20, the first guide pin segment 41, the second guide pin segment 42, the third guide pin segment 51 and the fourth guide pin segment 52 cannot occupy additional space To increase the volume of the filter, so the first guide needle section 41, the second guide needle section 42, the third guide needle section 51 and the fourth guide needle section 52 are all arranged as straight lines parallel to each other, so that the first guide needle Section 41, the second guide pin segment 42, the third guide pin segment 51 and the fourth guide pin segment 52 are located inside the housing 10 and will be in the space formed by the second PCB board 31 and the PCB feedthrough capacitor 20, while the other A part will protrude to the outside of the housing 10 without increasing the volume of the filter. Further, when the first guide needle segment 41, the second guide needle segment 42, the third guide needle segment 51 and the fourth guide needle segment 52 are arranged in parallel, the positive input port 11, the negative input port 12, the positive output port 13 and the The negative output port 14 can be on the same side of the housing 10. Specifically, the positive input port 11, the negative input port 12, the positive output port 13 and the negative output port 14 can be arranged in a square, so that the positive input port 11, the negative input port 12. The distance between the positive output port 13 and the negative output port 14 can be more uniform and as large as possible to reduce mutual influence.

Further optionally, as a specific implementation of the filter provided in the embodiment of the application, the materials of the first guide pin 40, the second guide pin 50, and the housing 10 are the same, so that the fourth guide pin section 52 and the negative output port 14 It is easier to connect the fourth guide pin segment 52 and the shell 10; the first guide pin 40, the second guide pin 50 and the shell 10 can be made of the same material, and the shell 10 can be a metal shell. The strength of the casing 10 is improved, and at the same time, the influence of the outside world on the electronic devices in the casing 10 can be shielded, and the insertion loss can be reduced. In addition, the shell 10 is made of a metal shell, and the first PCB board 21 can also be connected to the shell 10 during installation, so that the ground electrode on the first PCB board 21 is electrically connected to the shell 10 to increase the grounding area. Better grounding. The first guide needle segment 41, the second guide needle segment 42 and the third guide needle segment 51 can be set to be the same, that is, the length and size are all the same, for example, the first guide needle segment 41, the second guide needle segment 42, the third guide needle segment The three guide needle segments 51 can be configured as cylinders with the same length and diameter. In order to maintain a uniform appearance, the fourth guide needle segment 52 is also configured as a cylinder with the same length and diameter as the first guide needle segment 41 .

Further, referring to FIG. 3 , as a specific implementation of the filter provided in the embodiment of the application, the housing 10 is filled with cured glue 70 . Fill the casing 10 with curing glue 70, so that the PCB feedthrough capacitor 20, the PCB assembly 30, the first guide pin 40, the second guide pin 50 and the magnetic bead 60 are wrapped by the curing glue 70 to form an integrated structure by curing, without contact with The shell 10 is first subjected to the stresses caused by tests such as impact, temperature shock, random vibration, high-frequency vibration, low-frequency vibration, impact, etc., by the shell 10, thereby achieving the purpose of protecting the PCB feedthrough capacitor 20 and chip ceramic capacitor 32, improving stability and reliability. Preferably, the cured glue 70 can be A/B glue. Of course, the curing strip can also be other glues, such as epoxy resin glue and the like.

The manufacturing process of the filter in the embodiment of the present application is as follows: a multilayer printed circuit board is used to manufacture the first PCB board 21, and a feedthrough capacitor is formed during the manufacturing process, that is, the first PCB board 21 integrated with the feedthrough capacitor is obtained; Ordinary ceramic chip capacitors are soldered to the second PCB board 31 by a reflow process and integrated into a PCB assembly 30; firstly, the PCB feedthrough capacitor 20 is loaded into the shell 10, the PCB feedthrough capacitor 20 faces up, and the PCB feedthrough capacitor 20 Solder close to the inner bottom of the shell 10, then pass the first guide pin 40 and the second guide pin 50 through the PCB feedthrough capacitor 20, and connect the first guide pin segment 41, the second guide pin segment 42 and the third guide pin Put the magnetic beads 60 on the section 51, then put the PCB assembly 30 into the shell 10, and pass the guide pin through the PCB assembly 30 for welding to obtain a semi-finished product; then use a heat-conducting potting glue to pot the semi-finished product, and the potting glue is cured Finally, the finished filter is packaged by parallel seam welding process.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (10)

1. A filter, characterized in that, comprising: The shell (10) has a positive input port (11), a negative input port (12), a positive output port (13) and a negative output port (14); PCB feedthrough capacitance (20), located in the housing (10), the PCB feedthrough capacitor (20) is a feedthrough capacitor integrated on the first PCB board (21); PCB assembly (30), is located in described housing (10), and described PCB assembly (30) comprises the second PCB board (31) and is arranged on the patch ceramic capacitance ( 32); The first guide pin (40), the first guide pin (40) is electrically connected to the second PCB board (31), and the two ends of the first guide pin (40) are respectively pierced with magnetic beads (60 ) and pass through the positive input port (11) and the positive output port (13); A second guide pin (50), the second guide pin (50) is electrically connected to the PCB feed-through capacitor (20), one end of the second guide pin (50) is pierced with a magnetic bead (60) and Pass through the negative input port (12), and the other end through the negative output port (14). 2. The filter according to claim 1, characterized in that, The first PCB board (21) is a multi-layer printed circuit board, and the multi-layer printed circuit board forms the feedthrough capacitance. 3. The filter according to claim 2, characterized in that, The first guide pin (40) includes a first guide pin segment (41) and a second guide pin segment (42) electrically connected to the second PCB board (31), and the first guide pin segment (41 ) is perforated with magnetic beads (60) and passed through the positive input port (11), and the second guide needle section (42) is perforated with magnetic beads (60) and passed through the positive output port ( 13); The second guide pin (50) includes a third guide pin segment (51) and a fourth guide pin segment (52) electrically connected to the PCB feedthrough capacitor (20), and the third guide pin segment (51 ) is perforated with a magnetic bead (60) and passes through the negative input port (12), and the fourth guide needle segment (52) passes through the negative output port (14). 4. The filter according to claim 3, further comprising: The first connecting guide pin (43), the two ends of the first connecting guide pin (43) are respectively connected to one end of the first guide pin section (41) located in the housing (10) and the second guide pin The needle segment (42) is located at one end of the housing (10); The second connecting guide pin (53), the two ends of the second connecting guide pin (53) are respectively connected to one end of the third guide pin segment (51) located in the housing (10) and the fourth guide pin. The needle segment (52) is located at one end of the housing (10); The materials of the first connecting guide pin (43) and the second connecting guide pin (53) are both silver. 5. The filter according to claim 3 or 4, characterized in that, The second PCB board (31) is provided with a first conductive hole (311) and a first through hole (312), and the PCB feedthrough capacitor (20) is provided with a second conductive hole (201) and a second through hole (202); Both the first guide needle segment (41) and the third guide needle segment (51) pass through the first conductive hole (311) and the second through hole (202), and the first guide needle A section (41) passes through the casing (10) from the positive input port (11), and the third guide needle segment (51) passes through the casing (10) from the negative input port (12); Both the second guide needle segment (42) and the fourth guide needle segment (52) pass through the first through hole (312) and the second conductive hole (201), and the second guide needle A segment (42) passes through the casing (10) from the positive output port (13), and the fourth guide needle segment (52) passes through the casing (10) from the negative output port (14). 6. The filter according to claim 5, characterized in that, The fourth guide pin segment (52) is welded together with the negative output port (14); The PCB feedthrough capacitor (20) has a ground electrode (22) connected to the fourth guide pin segment (52), and the PCB feedthrough capacitor (20) has one side surface of the ground electrode (22) Connect with the shell (10). 7. The filter according to claim 6, wherein The second PCB board (31) is arranged in parallel with the PCB feedthrough capacitor (20), and the side surface of the chip ceramic capacitor (32) installed on the second PCB board (31) faces the PCB feedthrough capacitor (20); The magnetic beads (60) are located between the second PCB board (31) and the PCB feedthrough capacitor (20). 8. The filter according to claim 7, wherein The first guide needle segment (41), the second guide needle segment (42), the third guide needle segment (51) and the fourth guide needle segment (52) are parallel to each other, and the first guide needle segment A guide pin segment (41) is perpendicular to the second PCB board (31); The positive input port (11), the negative input port (12), the positive output port (13) and the negative output port (14) are arranged in a square shape. 9. The filter according to any one of claims 6-8, characterized in that, The materials of the first guide pin (40), the second guide pin (50) and the shell (10) are the same. 10. The filter of claim 9, wherein The casing (10) is filled with cured glue (70).

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