CN114050799A - Blocking structure in filter and filter - Google Patents

Abstract

The embodiment of the invention discloses a blocking structure in a filter and the filter, belonging to the technical field of communication. This block straight structure includes: the PCB comprises straight spacers, a PCB and metal screws, wherein the metal screws sequentially penetrate through the PCB and the straight spacers so as to fix the PCB and the straight spacers; the upper and lower surfaces of the PCB are coated with green oil. In the embodiment of the invention, as the upper surface and the lower surface of the PCB are coated with the green oil which is insulated, even if foreign matters capable of penetrating through the straight-separating sheets exist between the PCB and the straight-separating sheets, the short circuit of the straight-separating structure can not be caused. Because the cost of the metal screw is lower, the cost of the blocking structure can be reduced.

Description

Blocking structure in filter and filter

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a blocking structure in a filter and the filter.

Background

Be provided with on the apron of wave filter and separate the straight structure, including separating straight piece, PCB (Printed Circuit Board) Board and PEEK screw in this separates the straight structure, and the PEEK screw passes PCB in proper order and separates the cavity that gets into the wave filter behind the straight piece to fix PCB and the straight piece on the apron.

Because the lower surface of the PCB adopts the paint spraying process and is not provided with an insulating layer, if foreign matters capable of penetrating through the straight-separating sheet exist between the PCB and the straight-separating sheet, the short circuit of the straight-separating structure can be caused. In addition, PEEK screws are costly, resulting in a high cost of the DC blocking structure.

Disclosure of Invention

The embodiment of the invention provides a blocking structure in a filter and the filter, which are used for solving the technical problems that the blocking structure in the prior art is easy to generate short circuit and has high cost. The technical scheme is as follows:

in one aspect, a dc blocking structure in a filter is provided, where the dc blocking structure includes: the PCB comprises straight spacers, a PCB and metal screws, wherein the metal screws sequentially penetrate through the PCB and the straight spacers so as to fix the PCB and the straight spacers;

the upper and lower surfaces of the PCB are coated with green oil.

In one possible implementation, a first amount of solder resist is disposed on an upper surface of the PCB, the solder resist being uncoated with green oil.

In one possible implementation, the solder resist is used for connecting a lightning arrester.

In one possible implementation, the solder resist is used to connect a lead, which is used to transmit an electrical signal.

In a possible implementation manner, a second number of first through holes are distributed among the first number of solder masks, and the first through holes are through capacitors.

In a possible implementation manner, a second through hole is provided at a central position of the PCB, and the second through hole is used for connecting a coil.

In a possible implementation manner, a circular ring which is not coated with green oil is arranged around the second through holes, and a third number of third through holes are arranged on the circular ring, and the diameter of each third through hole is smaller than that of each second through hole.

In one possible embodiment, the third through-opening is used for throughflow.

In another aspect, a filter is provided, where the filter includes a cover plate, a cavity, and the blocking structure as described above;

and metal screws in the blocking structure sequentially penetrate through the PCB and the blocking sheet and then enter the cavity, so that the PCB and the blocking sheet are fixed on the cover plate.

In a possible implementation manner, two straight-blocking structures are arranged on the cover plate.

The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:

since the upper surface and the lower surface of the PCB are coated with the green oil which is insulated, even if foreign matters capable of penetrating through the straight-blocking piece exist between the PCB and the straight-blocking piece, the short circuit of the straight-blocking structure can not be caused. Because the cost of the metal screw is lower, the cost of the blocking structure can be reduced.

First through holes of a second quantity are distributed among the solder resists of the first quantity, so that the feedthrough capacitor can be realized through the first through holes.

The third through holes of a third quantity are arranged around the second through holes, and the third through holes are used for through flow, so that when the second through holes bear large current, the third through holes can be used for shunting, and the blocking structure is prevented from being damaged.

Drawings

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

Fig. 1 is a schematic diagram of a dc blocking structure in a filter in one embodiment of the invention;

FIG. 2 is a schematic view of an upper surface of a PCB in one embodiment of the invention;

FIG. 3 is a schematic view of the lower surface of a PCB in one embodiment of the invention;

fig. 4 is a schematic diagram of a filter in one embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, a dc blocking structure in a filter according to an embodiment of the present invention is shown, where the dc blocking structure includes: the straight spacer 110, the PCB120 and the metal screw 130, the metal screw 130 sequentially penetrates through the PCB120 and the straight spacer 110 to fix the PCB120 and the straight spacer 110.

The dc blocking structure in this embodiment includes two metal screws 130, and correspondingly, two mounting holes are respectively disposed on the dc blocking plate 110 and the PCB120, so that the metal screws 130 pass through the mounting holes to fix the PCB120 and the dc blocking plate 110. Wherein the mounting holes can be disposed at any position, two mounting holes are illustrated at both ends of the straight-bar spacer 110 and the PCB120 in fig. 1.

The upper and lower surfaces of the PCB120 are coated with green oil, and referring to fig. 2 and 3, the upper surface of the PCB120 is shown in fig. 2, and the lower surface of the PCB120 is shown in fig. 3. Since the green oil is insulating, even if a foreign substance capable of penetrating through the straight piece 110 exists between the PCB120 and the straight piece 110, a short circuit does not occur in the straight structure.

In this embodiment, the upper surface of the PCB120 is provided with a first number of solder masks 121, and the solder masks 121 are not coated with green oil. The first number, shape, size and position of the solder resist 121 may be set according to requirements, and are not limited in this embodiment. The blocking structure in fig. 2 includes four rectangular solder masks 121, and the four solder masks 121 are respectively located at four corners of the PCB 120.

Solder mask 121 may be used to make electrical connections. In one example, solder mask 121 can be used to connect to a lightning arrester to perform the lightning protection function of the filter. In another example, solder mask 121 may be used to connect leads that are used to transmit electrical signals.

In this embodiment, a second number of first through holes 122 are distributed among the first number of solder masks 121, and the first through holes 122 are feedthrough capacitors. The first through hole 122 penetrates through the upper surface and the lower surface of the PCB120, and corresponds to a feedthrough capacitor.

The second number, diameter size and position of the first through holes 122 may be set according to requirements, and are not limited in this embodiment. In fig. 2, seven first through holes 122 are T-shaped between two solder resists 121 on the wide side, and seven first through holes 122 are T-shaped between two solder resists 121 on the other wide side.

In this embodiment, a second through hole 123 is disposed at a central position of the PCB120, and the second through hole 123 is used for connecting the coil.

Optionally, a circular ring 124 without green oil is disposed around the second through hole 123, and a third number of third through holes 125 are disposed on the circular ring 124, and the diameter of the third through holes 125 is smaller than that of the second through hole 123. The third number and the diameter of the third through hole 125 may be set according to requirements, and are not limited in this embodiment. In fig. 2, nine third through holes 125 are uniformly distributed on the ring 124.

The third through hole 125 in the present embodiment is used for through-flow. In one example, if the current generated by a lightning strike is large, the shunt may be performed through the third via 125, thereby avoiding damage to the dc blocking structure.

In addition, when the DC blocking structure includes the metal screw 130, the metal screw 130 may be installed by an installation tool, which may improve installation and production efficiency compared to manually installing a PEEK screw.

In summary, in the dc blocking structure provided by this embodiment, since the upper surface and the lower surface of the PCB are coated with the green oil, and the green oil is insulating, even if there is a foreign substance capable of penetrating through the dc blocking sheet between the PCB and the dc blocking sheet, the dc blocking structure will not be short-circuited. Because the cost of the metal screw is lower, the cost of the blocking structure can be reduced.

First through holes of a second quantity are distributed among the solder resists of the first quantity, so that the feedthrough capacitor can be realized through the first through holes.

The third through holes of a third quantity are arranged around the second through holes, and the third through holes are used for through flow, so that when the second through holes bear large current, the third through holes can be used for shunting, and the blocking structure is prevented from being damaged.

Referring to fig. 4, a filter according to an embodiment of the present invention is shown, where the filter includes: a cover plate 410, a cavity 420 and a blocking structure 430; the metal screw 130 in the dc blocking structure 430 sequentially passes through the PCB120 and the dc blocking plate 110 and then enters the cavity 420, so as to fix the PCB120 and the dc blocking plate 110 on the cover plate 410.

Wherein, the number and the position of the blocking structures 430 can be set according to the requirement. In fig. 4, two blocking structures 430 are disposed in the filter, and two blocking structures 430 are disposed on the cover plate 410.

In summary, in the filter provided by this embodiment, since the upper surface and the lower surface of the PCB are coated with the green oil, and the green oil is insulating, even if there is a foreign substance capable of penetrating through the straight-blocking piece between the PCB and the straight-blocking piece, the straight-blocking structure will not be short-circuited. Because the cost of the metal screw is lower, the cost of the blocking structure can be reduced.

First through holes of a second quantity are distributed among the solder resists of the first quantity, so that the feedthrough capacitor can be realized through the first through holes.

The third through holes of a third quantity are arranged around the second through holes, and the third through holes are used for through flow, so that when the second through holes bear large current, the third through holes can be used for shunting, and the blocking structure is prevented from being damaged.

The above description should not be taken as limiting the embodiments of the invention, and any modifications, equivalents, improvements and the like which are within the spirit and principle of the embodiments of the invention should be included in the scope of the embodiments of the invention.

Claims (10)

1. A dc blocking structure in a filter, the dc blocking structure comprising: the PCB comprises straight spacers, a PCB and metal screws, wherein the metal screws sequentially penetrate through the PCB and the straight spacers so as to fix the PCB and the straight spacers;

the upper and lower surfaces of the PCB are coated with green oil.

2. The structure of claim 1, wherein a first amount of solder resist is disposed on the upper surface of the PCB, and wherein the solder resist is not coated with green oil.

3. The dc blocking structure in filter according to claim 2, wherein the solder resist is used for connecting a lightning arrester.

4. The dc blocking structure in a filter according to claim 2, wherein the solder mask is used to connect a lead wire, which is used to transmit electrical signals.

5. The dc blocking structure of claim 2, wherein a second number of first through holes are distributed between the first number of solder masks, and the first through holes are feedthrough capacitors.

6. The structure of claim 1, wherein a second through hole is formed at a central position of the PCB, and the second through hole is used for connecting the coil.

7. The structure of claim 6, wherein a ring without green oil is disposed around the second through holes, and a third number of third through holes are disposed on the ring, and the diameter of the third through holes is smaller than that of the second through holes.

8. The dc blocking structure of claim 7, wherein the third via is for through flow.

9. A filter comprising a cover plate, a cavity and the dc blocking structure of any one of claims 1 to 8;

and metal screws in the blocking structure sequentially penetrate through the PCB and the blocking sheet and then enter the cavity, so that the PCB and the blocking sheet are fixed on the cover plate.

10. The filter of claim 9, wherein two of the dc blocking structures are disposed on the cover plate.

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