CN115242201A - Filter - Google Patents

Abstract

The application provides a filter, including the PCB board, cover lid, electric capacity, magnetic bead and the guide pin on the PCB board, electric capacity is installed on the PCB board, and the magnetic bead supports on the PCB board, and the guide pin includes cartridge first needle bar in the magnetic bead, the second needle bar that links to each other with the input of electric capacity and the current conducting plate of connecting first needle bar and second needle bar. According to the filter provided by the application, the first needle rod and the second needle rod are arranged on the conducting plate to form the guide pin, so that the structure is simple, and the resistance is small; the first needle bar cartridge with the guide pin is on the magnetic bead, links to each other the second needle bar of guide pin and the input of electric capacity for the wave filter is connected conveniently, and can avoid using the wire or lead wire in addition in the wave filter to link to each other magnetic bead and electric capacity, and then has reduced the resistance among the filter circuit, has increased the operating current among the filter circuit, has promoted the filter to high frequency interference signal's suppressive ability. Moreover, the guide pin is connected with the capacitor and the magnetic beads at the same time, and the assembly efficiency of the filter is improved.

Description

Filter

Technical Field

The application belongs to the technical field of filters, and particularly relates to a filter.

Background

The filter is applied in the direct current power circuit and the signal circuit to solve the problem of electromagnetic interference of the power circuit and the signal circuit. A plurality of wires or leads are needed to be adopted in the existing filter to be respectively connected with the capacitors and the magnetic beads, and more wires or leads are used to increase the resistance in the filter circuit, so that the working current in the circuit is reduced, and the filter effect of the filter on high-frequency noise is poor. In addition, the arrangement of more leads increases the assembly complexity of the filter and reduces the assembly efficiency of the filter.

Disclosure of Invention

An object of the embodiments of the present application is to provide a filter, so as to solve the problems in the prior art that the filter uses more leads or wires, resulting in lower operating current and low assembly efficiency.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: the utility model provides a filter, including the PCB board, cover lid, electric capacity, magnetic bead and the guide pin on the PCB board, electric capacity installs on the PCB board, and the magnetic bead supports on the PCB board, and the guide pin includes cartridge in the magnetic bead and with PCB board continuous first needle bar, the second needle bar that links to each other with the input of electric capacity and the current conducting plate of connecting first needle bar and second needle bar, first needle bar and second needle bar are located the same one side of current conducting plate.

In one embodiment, there are two magnetic beads, two magnetic beads are arranged side by side, and two first needle bars are in one-to-one correspondence with the two magnetic beads.

In one embodiment, the conductive plate is T-shaped, and the first needle bar and the two second needle bars are respectively arranged at three ends of the conductive plate.

In one embodiment, two first bonding pads are arranged on one side of the PCB, which is away from the capacitor, the two first bonding pads are respectively electrically connected with the two first pins, and the two first bonding pads extend to the side face of the PCB.

In one embodiment, the capacitors are two, and the two capacitors are arranged in parallel.

In one embodiment, the second pin is mounted on a PCB board, and the PCB board is provided with a conductive circuit connecting the input terminals of the two capacitors and the second pin.

In one embodiment, both capacitors are patch capacitors.

In one embodiment, the PCB board is formed with a first through hole for the first needle bar to pass through and a second through hole for the second needle bar to pass through, the first through hole is provided with a first conductive layer, the second through hole is provided with a second conductive layer, the first needle bar is fixed in the first through hole, and the second needle bar is fixed in the second through hole.

In one embodiment, the PCB is provided with a blind hole with insulating property, the magnetic bead part is arranged in the blind hole, and the bottom of the blind hole is provided with a second through hole.

In one embodiment, the first needle bar, the second needle bar and the conductive plate are of an integrated structure.

The beneficial effect of the filter that this application embodiment provided lies in: compared with the prior art, the filter has the advantages that the first needle rod and the second needle rod are arranged on the conducting plate to form the guide needle, so that the structure is simple, and the resistance is small; in addition, can be with the first needle bar cartridge of guide pin on the magnetic bead, and install the second needle bar of guide pin on the PCB board, with link to each other with the input of electric capacity, make the wave filter connect conveniently, and can avoid using the wire or lead wire to link to each other magnetic bead and electric capacity in addition in the wave filter, lead wire or wire's use among the filter circuit has been reduced, and then resistance among the filter circuit has been reduced, the operating current among the filter circuit has been increased, the filter has promoted the inhibition ability to high frequency interference signal, and then the filtering performance of promotion wave filter. And moreover, the guide pin is simultaneously connected with the capacitor and the magnetic beads, so that the assembly procedures of the filter are further reduced, and the assembly efficiency of the filter is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a first schematic structural diagram of a filter according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a filter according to an embodiment of the present application;

fig. 3 is an exploded schematic view of a filter according to an embodiment of the present disclosure;

fig. 4 is a schematic partial structural diagram of a filter according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a lead provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a PCB provided in an embodiment of the present application;

fig. 7 is a circuit diagram of a filter according to an embodiment of the present application.

Wherein, in the figures, the various reference numbers:

100-a filter; 10-a PCB board; 11-a first via; 111-a first conductive layer; 12-a second via; 121-a second conductive layer; 13-blind hole; 14-a first pad; 15-a second pad; 16-a third pad; 17-a fourth pad; 20-capacitance; 30-magnetic beads; 40-guiding the needle; 41-a conductive plate; 411-first section; 412-second segment; 42-a first needle shaft; 43-a second needle bar; 50-cover body.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can 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 be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used merely for convenience in describing the present application and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following explains the english nouns appearing herein:

PCB, english: printed Circuit Board; chinese: a printed circuit board or a printed wiring board.

Referring to fig. 1 and 2, a filter 100 provided herein is now described. The filter 100 includes a PCB 10, a cover 50, a capacitor 20, a magnetic bead 30, and a guide pin 40. The cover 50 covers the PCB 10 to place the devices on the PCB 10 in the cover 50 and protect the devices on the PCB 10. The cover 50 may be fixed to the PCB 10 by dispensing, and the dispensing is simple and easy to operate, so that the cover 50 is convenient to mount, and it can be understood that the cover 50 may be fixed to the PCB 10 by other methods. The capacitor 20 is mounted on the PCB 10, the magnetic bead 30 is supported on the PCB 10, and the magnetic bead 30 is used for suppressing high-frequency noise and spike interference on a signal line and a power line, and also has an ability of absorbing electrostatic pulses. The magnetic beads 30 are used for absorbing ultrahigh frequency signals, have high resistivity and magnetic conductivity, are equivalent to series connection of a resistor and an inductor, have better high-frequency filtering characteristics than common inductors, and can keep higher impedance in a wider frequency range, so that the frequency modulation filtering effect is improved. The lead 40 includes a first needle bar 42, a second needle bar 43, and a conductive plate 41, the conductive plate 41 connecting the first needle bar 42 and the second needle bar 43, the first needle bar 42 and the second needle bar 43 being located on the same side of the conductive plate 41. The first needle bar 42 and the second needle bar 43 are provided on the conductive plate 41 to form the lead 40, and the lead 40 thus provided is simple in structure and has a smaller electric resistance. The first pin 42 is inserted into the magnetic bead 30, and the first pin 42 is connected to the PCB 10, that is, the first pin 42 is connected to the PCB 10 after passing through the magnetic bead 30, and the second pin 43 is connected to the input terminal of the capacitor 20, that is, the second pin 43 is mounted on the PCB 10 and connected to the input terminal of the capacitor 20. That is to say, when the first needle bar 42 of the guide pin 40 is connected to the magnetic bead 30, the second needle bar 43 of the guide pin 40 can be connected to the input end of the capacitor 20 at the same time, so that the connection is convenient, and it is avoided that a wire or a lead is additionally used in the filter 100 to connect the magnetic bead 30 and the capacitor 20, so that the use of the wire or the lead in the filter 100 is reduced, and then the resistance in the filter circuit is reduced, the operating current in the filter circuit is increased, the suppression capability of the filter 100 on high-frequency interference signals is improved, and further the filtering performance of the filter 100 is improved. In addition, when the guide pin 40 is assembled on the filter 100, the first needle rod 42 and the second needle rod 43 of the guide pin 40 are simultaneously connected with the capacitor 20 and the magnetic bead 30, so that the assembling procedure of the filter 100 is reduced, and the assembling efficiency of the filter 100 is improved.

Compared with the prior art, the filter 100 provided by the application, the filter 100 of the application, through set up first needle bar 42 and second needle bar 43 on the conducting plate 41, in order to form the guide pin 40, simple structure and resistance are little, in addition, can insert the first needle bar 42 of guide pin 40 on the magnetic bead 30, and install the second needle bar 43 of guide pin 40 on the PCB board 10, in order to link to each other with the input of electric capacity 20, make the filter 100 connect conveniently, and can avoid using the wire or lead to link to magnetic bead 30 and electric capacity 20 in addition in the filter 100, the use of wire or lead in the filter circuit has been reduced, and then the resistance in the filter circuit has been reduced, the operating current in the filter circuit has been increased, the inhibition ability of filter 100 to high frequency interference signal has been promoted, and then the filtering performance of filter 100 has been promoted. Moreover, the guide pin 40 is connected to the capacitor 20 and the magnetic bead 30 at the same time, so that the assembly procedure of the filter 100 is further reduced, and the assembly efficiency of the filter 100 is improved.

In one embodiment, two magnetic beads 30 are provided, the two magnetic beads 30 are arranged side by side, and the two magnetic beads 30 are arranged in the filter 100 to form a T-shaped filter circuit, and the magnetic beads 30 at two ends of the T-shaped filter circuit can consume noise coupled to the signal line by the capacitor 20, so as to ensure the filtering effect of the filter 100. The first needle bars 42 of the guide needles 40 are two, the two first needle bars 42 correspond to the two magnetic beads 30 one by one, and each first needle bar 42 is inserted into one magnetic bead 30 to connect the magnetic bead 30 with the filter circuit, so as to suppress the high-frequency interference signals by the magnetic bead 30.

In one embodiment, the conductive plate 41 is T-shaped, that is, the conductive plate 41 has three ends, and two first needle rods 42 and one second needle rod 43 are respectively located at the three ends of the conductive plate 41, so as to ensure that the conductive pin 40 can better connect the input end of the capacitor 20 and the two magnetic beads 30, and at the same time, reduce the area of the conductive plate 41, further reduce the resistance of the conductive pin 40, increase the operating current of the filter 100, and improve the filtering performance of the filter 100.

Further, the conductive plate 41 includes a first section 411 and a second section 412, two first needle bars 42 are disposed at opposite ends of the first section 411, a second needle bar 43 is disposed at one end of the second section 412, and the other end of the second section 412 is connected to a middle portion of the first section 411, so that distances from the second needle bar 43 to the two first needle bars 42 are equal, and further, resistances from the second needle bar 43 to the two first needle bars 42 are equal, thereby reducing loss better.

Further, the position where the first section 411 and the second section 412 of the conductive plate 41 are connected is in an arc shape which is bent inwards, so that the edge angle is reduced, the charge concentration is reduced, the discharge is avoided, and the resistance is reduced.

In one embodiment, the number of capacitors 20 is one, one terminal of the capacitor 20 is an input terminal, the other terminal of the capacitor 20 is a ground terminal, and the second pin 43 of the lead 40 is connected to the input terminal of the capacitor 20.

In one embodiment, the number of capacitors 20 is two, two capacitors 20 are disposed in parallel, the lead 40 leads out the input terminals of the two capacitors 20, one terminal of the two capacitors 20 is an input terminal, the other terminal of the two capacitors 20 is a ground terminal, and the second pin 43 of the lead 40 is connected with the input terminals of the two capacitors 20. The two capacitors 20 are connected in parallel, so that the parasitic inductance of the capacitors 20 can be reduced, the suppression capability of the high-frequency interference signal of the filter 100 is enhanced, and the filtering performance of the filter circuit is improved.

In one embodiment, the capacitor 20 is a chip capacitor, and the chip capacitor can be attached to the PCB 10 by surface mounting, which is simple to mount. Moreover, the patch capacitor has a small size, a small mass, and high reliability, and can ensure the miniaturization of the filter 100.

In one embodiment, the second pin 43 is mounted on the PCB 10, and the PCB 10 is provided with a conductive circuit connecting the input terminals of the two capacitors 20 and the second pin 43, that is, when the two capacitors 20 are connected in parallel, the PCB 10 is provided with a conductive circuit, so that the input terminals of the two capacitors 20 are electrically connected to the second pin 43.

In one embodiment, the selection of the capacitor 20 is: at a nominal voltage of 100V, the amount of capacitor 20 ranges between 0-540nF, which ensures that filter 100 is well used.

Alternatively, the two capacitors 20 may be capacitors 20 of the same specification.

Optionally, the two capacitors 20 may also be capacitors 20 with different specifications, and may be specifically set according to actual use requirements.

It is understood that, in order to secure the structural strength of the PCB board 10, the thickness of the PCB board 10 may be increased to improve the reliability of the use of the filter 100. The thickness of the PCB 10 may be in the range of 1.5-3mm, which not only ensures the structural strength of the PCB 10, but also ensures the miniaturization of the filter 100.

In one embodiment, the PCB board 10 is formed with a first through hole 11, the first needle bar 42 of the guide pin 40 passes through the first through hole 11, the first through hole 11 is formed with a first conductive layer 111, the first needle bar 42 is fixed in the first through hole 11, that is, the first needle bar 42 of the guide pin 40 passes through the corresponding first through hole 11 and is fixed in the first through hole 11, and the first conductive layer 111 is formed in the first through hole 11, so as to communicate the guide pin 40, the PCB board 10 and the input end of the capacitor 20.

In one embodiment, the PCB 10 is provided with a second through hole 12, the second needle bar 43 of the guide pin 40 passes through the second through hole 12, the second through hole 12 is provided with a second conductive layer 121, the second needle bar 43 is fixed in the second through hole 12, that is, after passing through the magnetic bead 30, the second needle bar 43 of the guide pin 40 passes through the second through hole 12 on the PCB 10 and is fixed in the second through hole 12, and the second conductive layer 121 is provided in the second through hole 12, so that the guide pin 40 is electrically connected to the PCB 10. In addition, when the second needle bar 43 passes through the magnetic bead 30 and the second through hole 12 and is fixed in the second through hole 12, the conductive plate 41 on the guide pin 40 abuts against the magnetic bead 30, that is, the magnetic bead 30 is located between the conductive plate 41 and the PCB 10, and at this time, the magnetic bead 30 can be fixed on the PCB 10 more stably, and the magnetic bead 30 is prevented from loosening, which may affect the filtering performance of the filter 100.

In an embodiment, the PCB 10 is provided with a blind hole 13, the magnetic bead 30 is partially disposed in the blind hole 13, and the bottom of the blind hole 13 is provided with the first through hole 11, that is, the magnetic bead 30 is partially embedded in the blind hole 13 of the PCB 10, so as to reduce the height of the top of the magnetic bead 30 from the PCB 10, thereby reducing the size of the filter 100 and ensuring the miniaturization of the product. The blind hole 13 has an insulating property, so that the interference of the magnetic bead 30 can be avoided, and the filtering effect of the filter 100 can be prevented from being affected.

In one embodiment, the magnetic beads 30 are of the type: under the frequency of 100MHz, the impedance range of the magnetic bead 30 is 0-60 Ω, which can satisfy the high frequency suppression capability of the magnetic bead 30 and ensure the parasitic resistance of the magnetic bead 30 in a reasonable range.

In one embodiment, the first needle shaft 42, the second needle shaft 43 and the conductive plate 41 of the guide pin 40 are formed integrally, which not only facilitates the manufacturing process, but also reduces the resistance of the guide pin 40 and improves the over-current capability of the guide pin 40.

In one embodiment, when the number of the magnetic beads 30 is two, the number of the first pins 42 of the lead 40 is two, and the two first pins 42 are electrically connected to the electrode input terminal and the electrode output terminal of the filter 100, respectively, so that when the filter 100 is mounted on an electronic product, the filter 100 can be mounted on the electronic product by electrically connecting the two first pins 42 on the filter 100.

Further, the PCB board 10 is provided with two first pads 14 on a side thereof facing away from the capacitor 20, and the two first pads 14 are electrically connected to the two first pins 42, respectively. When the two first pins 42 are electrically connected to the electrode input terminal and the electrode output terminal of the filter 100, respectively, the two first pads 14 are also electrically connected to the electrode input terminal and the electrode output terminal, respectively, so that when the filter 100 is mounted on an electronic product, the filter 100 can be mounted on the electronic product by connecting the two first pads 14 to the electronic product by soldering. Further, the first pads 14 extend to the side of the PCB board 10 to increase the area of the first pads 14, ensuring the soldering effect of the first pads 14.

In one embodiment, a second pad 15 is disposed on a side of the PCB board 10 facing away from the capacitor 20, and the second pad 15 is disposed on a ground terminal of the capacitor 20 for grounding. In one embodiment, the number of the second pads 15 is three, further ensuring the grounding effect of the capacitor 20.

In one embodiment, the third pad 16 is disposed on a side of the PCB 10 away from the capacitor 20, and when the filter 100 is mounted on an electronic product, the third pad 16 can be connected to the electronic product by soldering, so as to improve the fixing performance of the filter 100 to the electronic product.

In one embodiment, the PCB 10 is provided with a fourth bonding pad 17 at a position corresponding to the capacitor 20, so that the terminal electrode of the capacitor 20 is soldered to the PCB 10.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a filter, includes the PCB board and cover in lid on the PCB board which characterized in that: the filter still includes electric capacity, magnetic bead and guide pin, electric capacity install in on the PCB board, the magnetic bead support in on the PCB board, the guide pin including the cartridge in the magnetic bead and with first needle bar that the PCB board links to each other, with the second needle bar that the input of electric capacity links to each other and connect first needle bar with the current conducting plate of second needle bar, first needle bar with the second needle bar is located same one side of current conducting plate.

2. The filter of claim 1, wherein: the magnetic bead is two, two the magnetic bead sets up side by side, first needle bar is two, two first needle bar and two the magnetic bead one-to-one.

3. The filter of claim 2, wherein: the current conducting plate is T-shaped, and the first needle bar and the two second needle bars are respectively arranged at three ends of the current conducting plate.

4. The filter of claim 2, wherein: the PCB board is kept away from be equipped with two first pads in the one side of electric capacity, two first pad is respectively with two first pin electricity is connected, two first pad extends to the side of PCB board.

5. The filter of any of claims 1-4, wherein: the number of the capacitors is two, and the two capacitors are arranged in parallel.

6. The filter of claim 5, wherein: the second needle bar is arranged on the PCB, and the PCB is provided with a conductive circuit for connecting the input ends of the two capacitors and the second needle bar.

7. The filter of claim 5, wherein: and the two capacitors are both patch capacitors.

8. The filter of any of claims 1-4, wherein: offer the confession on the PCB board first through-hole that first needle bar passed and confession the second through-hole that the second needle bar passed, be equipped with first conducting layer in the first through-hole, be equipped with the second conducting layer in the second through-hole, first needle bar is fixed in the first through-hole, the second needle bar is fixed in the second through-hole.

9. The filter of claim 8, wherein: the PCB is provided with a blind hole with insulating property, the magnetic bead part is arranged in the blind hole, and the bottom of the blind hole is provided with the second through hole.

10. The filter of any of claims 1-4, wherein: the first needle bar, the second needle bar and the conductive plate are of an integrally formed structure.

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