CN218679012U - Filter - Google Patents

Abstract

The utility model belongs to the technical field of electronic devices, and discloses a filter, which comprises a socket and a PCB board, wherein the socket comprises a base body, a positioning component and two first conductive columns, the two first conductive columns are arranged at intervals and penetrate through the base body, and the positioning component is arranged on the base body; the PCB board is positioned in the positioning assembly, one end of the first conductive column is electrically connected to the PCB board, the other end of the first conductive column is a butt joint end, and the butt joint end is used for electrically connecting butt joint equipment. The first conductive column penetrates through the base body, one end of the first conductive column is electrically connected to the PCB, the other end of the first conductive column is a butt joint end, the butt joint end is used for electrically connecting the butt joint equipment, the electric connection between the filter and the butt joint equipment is achieved, the PCB is directly connected to the socket, and a circuit between the PCB and the socket is omitted. The utility model provides a compact structure of wave filter, occupation space is little, and electric connection's firm nature is higher.

Description

Filter

Technical Field

The utility model belongs to the technical field of the electron device, especially, relate to a filter.

Background

A filter is a frequency-selective device that passes certain frequency components of a signal while significantly attenuating other frequency components. By using the frequency selection function of the filter, interference noise can be filtered out or spectrum analysis can be carried out.

At present, the PCB and the socket of the filter are respectively connected to different positions of the shell, the PCB is electrically connected to the conductive columns on the socket through circuits, so the PCB, the socket and the components connected on the PCB are distributed, the occupied space is large, the size of the filter is large, and the circuits in the filter are more, so that the electrical connection is not firm enough.

Therefore, a filter is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a filter, its compact structure, occupation space is little, and moreover, electric connection's firm nature is higher.

To achieve the purpose, the utility model adopts the following technical proposal:

a filter, comprising: the socket comprises a base body, a positioning assembly and two first conductive columns, wherein the two first conductive columns are arranged at intervals and penetrate through the base body, and the positioning assembly is arranged on the base body; the PCB is positioned on the positioning assembly, one end of the first conductive column is electrically connected to the PCB, the other end of the first conductive column is a butt joint end, and the butt joint end is used for electrically connecting butt joint equipment; the positioning assembly comprises two first positioning bulges and two socket terminals, the first positioning bulges are connected to the base body, the two first positioning bulges and the two socket terminals are arranged in a one-to-one correspondence mode, each first positioning bulge and one end of each corresponding socket terminal are abutted to the two opposite sides of the PCB respectively, and the other end of each socket terminal is electrically connected with one first conductive column.

As an optimal technical scheme of the filter, the positioning assembly further comprises two limiting blocks, the limiting blocks are connected to the base body, the two limiting blocks and the two first positioning protrusions are arranged in a one-to-one correspondence mode, each limiting block and the corresponding first positioning protrusion enclose a first positioning groove, and each socket terminal is correspondingly positioned in one first positioning groove.

As an optimal technical scheme of the above-mentioned wave filter, one end of the socket terminal is provided with a folded portion, the folded portion abuts against the side wall of the PCB plate away from the first positioning protrusion, the other end of the socket terminal is provided with a first through hole, and one end of the first conductive column penetrates through the first through hole.

As a preferred technical scheme of the filter, the filter further comprises two capacitors, a second through hole is formed in the folding part, the capacitors are arranged on the base body, one end of each capacitor penetrates through one second through hole and then is inserted into the PCB, and the other end of each capacitor is inserted into the PCB.

As a preferable technical solution of the above filter, a recessed portion is provided on the base, and both the capacitors are provided in the recessed portion.

As a preferable technical solution of the above filter, an insulating protective plate is provided on the top cover of the recess.

As a preferable technical solution of the above filter, the positioning assembly further includes a plurality of second positioning protrusions, the second positioning protrusions are connected to the base, and the second positioning protrusions abut against one sidewall of the PCB.

As an optimal technical scheme of the filter, each second positioning protrusion is convexly provided with a clamping block, the end part of the PCB is provided with a plurality of clamping grooves, and the clamping blocks are clamped in the clamping grooves in a one-to-one correspondence mode.

As a preferred technical solution of the above filter, the socket further includes a second conductive pillar, a ground wire, and a ground terminal, the second conductive pillar is disposed through the base, the second conductive pillar and the two first conductive pillars are disposed at three corners of a triangle, respectively, one end of the second conductive pillar is inserted into the ground terminal, the other end of the second conductive pillar is used for electrically connecting the docking device, one end of the ground wire is connected to the ground terminal, and the other end of the ground wire is inserted into the PCB.

As a preferred technical solution of the above filter, a first flange is disposed on a side portion of the ground terminal, a third through hole is disposed on the first flange, and one end of the ground wire penetrates through the third through hole and then bends to form a hook.

As a preferred technical scheme of the above filter, the filter further includes a housing, the housing is sleeved outside the socket and the PCB, one end of the ground terminal departing from the second conductive pillar has a second flange, and the second flange is inserted into the housing.

In a preferred embodiment of the filter, a blocking portion is provided on the base in a protruding manner, and the blocking portion blocks between the ground terminal and the receptacle terminal.

As a preferred technical solution of the above filter, at least two third positioning protrusions are convexly provided on the base, the at least two third positioning protrusions surround to form a second positioning groove, and the ground terminal is positioned in the second positioning groove.

As an optimal technical scheme of the filter, the filter further comprises a shell, the shell comprises a middle shell, a rear shell and a front cover, the middle shell is connected to one end, facing the PCB, of the base body, the rear shell and the front cover are respectively connected to two sides of the middle shell, the outer side of the PCB is sleeved with the rear shell, and the outer side of the socket is sleeved with the front cover.

As a preferred technical scheme of above-mentioned wave filter, well casing is the square frame structure, and well casing cover is located outside the PCB board, and connects in the terminal surface of base member towards the PCB board.

As an optimal technical scheme of above-mentioned wave filter, well casing includes main part frame, preceding connection limit and back connection limit, and preceding connection limit is the angle and connects in the outward flange of main part frame, and the back connection limit is the angle and connects in the inward flange of main part frame, and preceding connection limit sets up respectively in the both sides of main part frame with the back connection limit, and preceding connection limit is connected in the inner wall of protecgulum, and the back connection limit is connected in the inner wall of back casing.

As a preferred technical solution of the above filter, the housing further includes an insulating sheath, the insulating sheath is sleeved outside the PCB, and the middle casing and the rear casing are sleeved outside the insulating sheath.

As a preferred technical scheme of above-mentioned wave filter, the tip of protecgulum has seted up logical groove, and the head of base member is worn out through leading to the groove in the protecgulum, presss from both sides before the inner wall of logical groove and the outer wall of base member and is equipped with the gasket.

As a preferred technical solution of the above filter, the filter further includes an X capacitor, a first Y capacitor, a second Y capacitor, a third Y capacitor, a fourth Y capacitor and a common mode inductor all connected to the PCB board, the X capacitor is connected in parallel to an input end of the common mode inductor, a series branch formed by connecting the first Y capacitor and the second Y capacitor in series is connected in parallel to the X capacitor, a ground line is disposed between the first Y capacitor and the second Y capacitor, a series branch formed by connecting the third Y capacitor and the fourth Y capacitor in series is connected in parallel to an output end of the common mode inductor, and a ground line is disposed between the third Y capacitor and the fourth Y capacitor.

The utility model has the advantages that:

the utility model provides a filter, its socket include base member, locating component and two first leading electrical pillar, and two first leading electrical pillar are separated from each other and are set up to wear to locate the base member, and locating component sets up on the base member, and the PCB board is located locating component, and the one end electricity of first leading electrical pillar is connected in the PCB board, and the other end is butt joint end, and butt joint end is used for the electricity to connect the butt joint equipment. The utility model provides a PCB board direct connection of wave filter has saved the circuit between PCB board and the socket in the socket for compact structure has improved electric connection's firm nature.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic diagram of an exploded structure of a filter according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a socket and a PCB board provided in an embodiment of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is a schematic structural diagram of a filter provided in an embodiment of the present invention;

fig. 5 is an exploded schematic view of a filter according to an embodiment of the present invention after a housing is hidden;

FIG. 6 is an enlarged view at B in FIG. 1;

FIG. 7 is an enlarged view at C in FIG. 5;

fig. 8 is a schematic structural diagram of a ground terminal and a ground wire provided in an embodiment of the present invention;

fig. 9 is a schematic diagram of an exploded structure of a filter according to an embodiment of the present invention;

FIG. 10 is an enlarged view at D of FIG. 9;

fig. 11 is a circuit diagram of a filter according to an embodiment of the present invention.

In the figure:

1. a socket; 2. a PCB board; 3. an X capacitor; 4. a first Y capacitor; 5. a second Y capacitor; 6. a third Y capacitor; 7. a fourth Y capacitor; 8. a common mode inductor; 9. a housing; 10. a live wire lead-out; 20. a zero line outgoing line; 30. an outgoing line; 40. a connector;

11. a substrate; 12. a positioning assembly; 13. a first conductive post; 14. a second conductive post; 15. a ground line; 16. a ground terminal; 21. a card slot; 91. a middle shell; 92. a rear housing; 93. a front cover; 94. an insulating guard plate; 95. an insulating sheath; 96. a gasket;

111. a recessed portion; 112. a blocking section; 113. a third positioning projection; 121. a first positioning projection; 122. a socket terminal; 123. a limiting block; 124. a second positioning projection; 125. a clamping block; 131. a butt joint end; 161. a fourth via hole; 162. second flanging; 163. a first flanging; 164. a third through hole; 911. a rear connecting edge; 912. a front connecting edge; 931. a through groove;

1221. a folding part; 1222. a first through hole; 1223. a second through hole; 9121. and (4) a groove.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly and can include, for example, a mounted connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not in direct contact, but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a filter, which includes a socket 1 and a PCB 2, wherein the PCB 2 is directly connected to the socket 1, so as to omit the circuit between the PCB and the socket in the prior art, make the structure compact, and improve the reliability of the electrical connection.

Specifically, as shown in fig. 2 to 4, the socket 1 includes a base 11, a positioning assembly 12, and two first conductive pillars 13, where the two first conductive pillars 13 are disposed at intervals and penetrate through the base 11, and the positioning assembly 12 is disposed on the base 11; the PCB board 2 is positioned in the positioning assembly 12, one end of the first conductive pillar 13 is electrically connected to the PCB board 2, the other end is a docking end 131, and the docking end 131 is used for electrically connecting a docking device.

In the filter provided by this embodiment, the first conductive pillar 13 is disposed through the substrate 11, one end of the first conductive pillar is electrically connected to the PCB 2, the other end of the first conductive pillar is a docking end 131, and the docking end 131 is used for electrically connecting the docking device and is used for electrically connecting the filter and the docking device; the two first conductive columns 13 are respectively used for electrically connecting a live wire and a zero line; the PCB 2 is directly connected with the socket 1, so that a circuit between the PCB and the socket in the prior art is omitted, the structure is compact, and the firmness of electric connection is improved.

Specifically, as shown in fig. 2 and 3, the positioning assembly 12 includes two first positioning protrusions 121 and two socket terminals 122, the first positioning protrusions 121 are connected to the base 11, the two first positioning protrusions 121 and the two socket terminals 122 are arranged in a one-to-one correspondence, one end of each first positioning protrusion 121 and one end of each corresponding socket terminal 122 abut against two opposite sides of the PCB board 2, and the other end of each socket terminal 122 is electrically connected to one first conductive pillar 13. The first positioning protrusions 121 and the socket terminals 122 are respectively abutted to two opposite sides of the PCB 2 to fix the PCB 2, thereby achieving the direct connection between the PCB 2 and the socket 1. The socket terminal 122 simultaneously realizes the electrical connection between the PCB board 2 and the first conductive pillar 13.

Specifically, as shown in fig. 3 and 5, one end of each socket terminal 122 is provided with a folded portion 1221, the folded portions 1221 abut against the side wall of the PCB 2 away from the first positioning protrusion 121, the folded portions 1221 of the two socket terminals 122 abut against the live wire input portion and the neutral wire input portion of the PCB 2, the other end of each socket terminal 122 is provided with a first through hole 1222, and one end of the first conductive pillar 13 is inserted into the first through hole 1222. The folding part 1221 improves the positioning firmness of the socket terminal 122 to the PCB board 2, and improves the firmness of the electrical connection between the socket terminal and the PCB board. The first through hole 1222 and the first conductive pillar 13 are matched and plugged, so that the connection firmness of the first through hole 1222 and the first conductive pillar 13 is ensured.

More specifically, as shown in fig. 3, the positioning assembly 12 further includes two limiting blocks 123, the limiting blocks 123 are connected to the base 11, the two limiting blocks 123 and the two first positioning protrusions 121 are disposed in a one-to-one correspondence, each limiting block 123 and the corresponding first positioning protrusion 121 enclose a first positioning groove, and each socket terminal 122 is correspondingly positioned in one first positioning groove. The fixing firmness of the socket terminal 122 is improved due to the arrangement of the limiting block 123, so that the positioning firmness of the PCB 2 is guaranteed.

Further specifically, with continued reference to fig. 3, the first conductive pillars 13 are spaced from the stopper 123 and the first positioning protrusion 121. The first conductive pillar 13 limits the position of one end of the socket terminal 122, and if the position of the other end of the socket terminal 122 is not limited, the socket terminal 122 rotates around the first conductive pillar 13, so the rotation of the socket terminal 122 is limited by the positioning of the stopper 123 and the first positioning protrusion 121, and the position of the socket terminal 122 is firmly fixed.

Specifically, as shown in fig. 2 and 3, the positioning assembly 12 further includes a plurality of second positioning protrusions 124, the second positioning protrusions 124 are connected to the base 11, and the second positioning protrusions 124 abut against one sidewall of the PCB 2. The second positioning protrusion 124 further improves the positioning stability of the PCB 2.

More specifically, with reference to fig. 2 and fig. 3, each second positioning protrusion 124 is provided with a fixture block 125 in a protruding manner, the end of the pcb 2 is provided with a plurality of slots 21, and the plurality of fixture blocks 125 are clamped in the plurality of slots 21 in a one-to-one correspondence manner. In the present embodiment, two of the latch 125 and the catch groove 21 are provided. Of course, the number of the latches 125 and the slots 21 may be other, and is not limited in this respect.

Optionally, the two first positioning protrusions 121 abut against two ends of one side of the PCB 2, respectively, and the two second positioning protrusions 124 are disposed between the two first positioning protrusions 121 and abut against the same side of the PCB 2 as the first positioning protrusions 121. So set up, one side of PCB board 2 is fixed in socket 1 for the remaining position of PCB board 2 can not receive socket 1's interference, thereby guarantees that PCB board 2 has other components and parts of sufficient position installation.

Specifically, as shown in fig. 5 and fig. 6, the filter further includes two capacitors, a second through hole 1223 is formed in the folded portion 1221, the capacitors are disposed on the base 11, and one end of each capacitor passes through one second through hole 1223 and then is inserted into the PCB 2. The capacitor passes through the second through hole 1223, and has a limiting effect on one end of the socket terminal 122, so that the positioning firmness of the socket terminal 122 is further improved, and moreover, the structure is more compact. In this embodiment, the two capacitors are a first Y capacitor 4 and a second Y capacitor 5, respectively, one end of the first Y capacitor 4 is inserted into the PCB 2 after passing through one second through hole 1223, the other end of the first Y capacitor is inserted into the PCB 2, one end of the second Y capacitor 5 is inserted into the PCB 2 after passing through the other second through hole 1223, and the other end of the second Y capacitor is inserted into the PCB 2.

Specifically, both ends of the capacitor are connected to the PCB 2 by wave soldering. The firmness of connection is ensured, and the manufacturing efficiency is improved.

Specifically, as shown in fig. 5, a concave portion 111 is provided on the base 11, and both capacitors are provided in the concave portion 111. The concave part 111 is used for accommodating the capacitor, and has a limiting effect and a protecting effect on the capacitor. In the present embodiment, the first Y capacitor 4 and the second Y capacitor 5 are disposed in the recess 111.

Specifically, as shown in fig. 5, the socket 1 further includes a second conductive pillar 14, a ground line 15, and a ground terminal 16, the second conductive pillar 14 penetrates through the substrate 11, the second conductive pillar 14 and the two first conductive pillars 13 are respectively disposed at three corners of a triangle, one end of the second conductive pillar 14 is inserted into the ground terminal 16, the other end of the second conductive pillar is used for electrically connecting the docking device, one end of the ground line 15 is connected to the ground terminal 16, and the other end of the ground line 15 is inserted into the PCB 2. The second conductive pillar 14 is used for grounding. The ground line 15 and the ground terminal 16 electrically connect the second conductive pillar 14 and the PCB board 2.

Specifically, as shown in fig. 5 and 7, the blocking portion 112 protrudes from the base 11, and the blocking portion 112 blocks between the ground terminal 16 and the receptacle terminal 122, so that the ground terminal 16 and the receptacle terminal 122 are prevented from contacting to affect the normal conductive function.

With continued reference to fig. 5 and 7, at least two third positioning protrusions 113 are protrudingly disposed on the substrate 11, the at least two third positioning protrusions 113 define a second positioning groove, and the ground terminal 16 is positioned in the second positioning groove. The provision of the third positioning projection 113 improves the fixation firmness to the ground terminal 16. In the present embodiment, two third positioning projections 113 are provided.

Specifically, as shown in fig. 5 and 8, a first flanging 163 is disposed on a side portion of the ground terminal 16, a third through hole 164 is disposed on the first flanging 163, and one end of the ground wire 15 is bent to form a hook after passing through the third through hole 164, so as to achieve a firm connection between the ground wire 15 and the ground terminal 16.

Specifically, with reference to fig. 5 and 8, one end of the ground terminal 16 is provided with a fourth through hole 161, and one end of the second conductive pillar 14 is inserted into the fourth through hole 161, so as to electrically connect the second conductive pillar 14 and the ground terminal 16. In the present embodiment, the other end of the ground terminal 16 is positioned in the second positioning groove formed by the two third positioning protrusions 113, so that the firmness of the connection between the ground terminal 16 and the base 11 is ensured.

Specifically, the filter provided by the embodiment further includes a housing 9, and the pcb 2, the socket 1 and the capacitor are all disposed in the housing 9, so as to protect the internal structure. As shown in fig. 7, one end of the ground terminal 16, which is far away from the fourth through hole 161, is provided with a second flange 162, and the second flange 162 is inserted into the housing 9 for improving the firmness of fixing the ground terminal 16.

As shown in fig. 5, the filter further includes an X capacitor 3, a first Y capacitor 4, a second Y capacitor 5, a third Y capacitor 6, a fourth Y capacitor 7 and a common mode inductor 8, all of which are connected to the PCB 2. The X capacitor 3, the first Y capacitor 4, the second Y capacitor 5, the third Y capacitor 6, the fourth Y capacitor 7 and the common mode inductor 8 are all arranged in the shell 9.

Specifically, as shown in fig. 1, 4 and 9, the housing 9 includes a middle case 91, a rear case 92 and a front cover 93, the middle case 91 is connected to one end of the base 11 facing the PCB board 2, the rear case 92 and the front cover 93 are respectively connected to two sides of the middle case 91, the rear case 92 is disposed outside the PCB board 2, the X capacitor 3, the third Y capacitor 6, the fourth Y capacitor 7 and the common mode inductor 8, and the front cover 93 is disposed outside the socket 1, the first Y capacitor 4 and the second Y capacitor 5.

More specifically, as shown in fig. 1, the middle housing 91 is a square frame structure, and the middle housing 91 is sleeved outside the PCB 2 and connected to an end surface of the base 11 facing the PCB 2. The square frame structure ensures the firmness of the connection with the substrate 11.

Further specifically, the middle casing 91 comprises a main body frame, a front connecting edge 912 and a rear connecting edge 911, wherein the front connecting edge 912 is connected to the outer edge of the main body frame at an angle, the rear connecting edge 911 is connected to the inner edge of the main body frame at an angle, the front connecting edge 912 and the rear connecting edge 911 are respectively arranged on two sides of the main body frame, the front connecting edge 912 is connected to the inner wall of the front cover 93, and the rear connecting edge 911 is connected to the inner wall of the rear casing 92. In the present embodiment, four front connecting edges 912 are provided, and the four front connecting edges 912 are respectively connected to four outer edges of the main body frame and are respectively connected to four inner walls of the front cover 93; the rear connection sides 911 are provided with four rear connection sides 911, and the four rear connection sides 911 are connected to four inner edges of the main body frame, and connected to four inner walls of the rear case 92, respectively.

In this embodiment, as shown in fig. 10, a front connecting edge 912 of the middle housing 91 is provided with a groove 9121, and the second flange 162 of the ground terminal 16 is inserted into a slot defined by the groove 9121 and an inner wall of the front cover 93.

Specifically, as shown in fig. 1, the housing 9 further includes an insulating sheath 95, and the insulating sheath 95 is sleeved outside the PCB 2, the X capacitor 3, the third Y capacitor 6, the fourth Y capacitor 7, and the common mode inductor 8 to perform an insulating function. The rear shell 92 and the middle shell 91 are sleeved outside the insulating sheath 95.

More specifically, the top cover of the recess 111 is provided with an insulating protector 94. That is, as shown in fig. 1, an insulating protective plate 94 is disposed on the outer side of the first Y capacitor 4 and the second Y capacitor 5 to insulate and protect the first Y capacitor 4 and the second Y capacitor 5. The front cover 93 is sleeved outside the insulating protection plate 94, and the insulating sheath 95 is pressed on the edge of the insulating protection plate 94.

As shown in fig. 4 and 9, a through groove 931 is formed at an end of the front cover 93, the head of the base body 11 passes through the through groove 931 from the inside of the front cover 93, and a gasket 96 is interposed between an inner wall of the through groove 931 and an outer wall of the base body 11. The firmness of the connection between the front cover 93 and the base body 11 is ensured. In the present embodiment, three spacers 96 are provided.

Specifically, as shown in fig. 4 and 5, the PCB 2 is further connected with a live line outgoing line 10 and a neutral line outgoing line 20, one ends of the live line outgoing line 10 and the neutral line outgoing line 20 are respectively connected to the live line output portion and the neutral line output portion of the PCB 2, the other ends of the live line outgoing line 10 and the neutral line outgoing line 20 are wound close to each other to form an outgoing line 30, the outgoing line 30 penetrates out from the tail portion of the rear housing 92, and the end portion of the outgoing line is connected with the connector 40.

Specifically, the ends of the X capacitor 3, the first Y capacitor 4, the second Y capacitor 5, the third Y capacitor 6, the fourth Y capacitor 7, the common mode inductor 8, the live wire outgoing line 10, the zero line outgoing line 20 and the ground line 15 are all plugged into the PCB 2 and connected by wave soldering. The firmness of connection is ensured, and the manufacturing efficiency is improved.

Specifically, CY1, CY2, CY3, CY4, CX1, and L1 in fig. 11 respectively represent the first Y capacitor 4, the second Y capacitor 5, the third Y capacitor 6, the fourth Y capacitor 7, the X capacitor 3, and the common mode inductor 8. The X capacitor 3 is connected in parallel to the input end of the common mode inductor 8, a series branch formed by connecting the first Y capacitor 4 and the second Y capacitor 5 in series is connected in parallel with the X capacitor 3, a ground wire is arranged between the first Y capacitor 4 and the second Y capacitor 5, a series branch formed by connecting the third Y capacitor 6 and the fourth Y capacitor 7 in series is connected in parallel to the output end of the common mode inductor 8, and a ground wire is arranged between the third Y capacitor 6 and the fourth Y capacitor 7.

The filter circuit formed by CY1 and CY2 in fig. 11 can suppress the common-mode interference signal existing on the power line; the filter circuit formed by CX1, L1, CY3 and CY4 can suppress electromagnetic noise and clutter signals of the input power supply, prevent interference to the power supply and suppress high-frequency clutter generated by the power supply. In this embodiment, CY1, CY2, CY3, and CY4 each use a ceramic capacitor having a capacitance of 2.2nF, and CX1 uses a thin-film capacitor having a capacitance of 0.1 nF.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (19)

1. A filter, comprising:

the socket (1) comprises a base body (11), a positioning assembly (12) and two first conductive columns (13), wherein the two first conductive columns (13) are arranged at intervals and penetrate through the base body (11), and the positioning assembly (12) is arranged on the base body (11);

the PCB (2) is positioned on the positioning assembly (12), one end of the first conductive column (13) is electrically connected to the PCB (2), the other end of the first conductive column is a butt joint end (131), and the butt joint end (131) is used for electrically connecting butt joint equipment;

the positioning assembly (12) comprises two first positioning protrusions (121) and two socket terminals (122), the first positioning protrusions (121) are connected to the base body (11), the two first positioning protrusions (121) and the two socket terminals (122) are arranged in a one-to-one correspondence manner, one end of each first positioning protrusion (121) and one end of each socket terminal (122) corresponding to the first positioning protrusion are respectively abutted to two opposite sides of the PCB (2), and the other end of each socket terminal (122) is electrically connected to one first conductive column (13).

2. The filter according to claim 1, wherein the positioning assembly (12) further comprises two position-limiting blocks (123), the position-limiting blocks (123) are connected to the base (11), the two position-limiting blocks (123) and the two first positioning protrusions (121) are arranged in a one-to-one correspondence, each position-limiting block (123) and the corresponding first positioning protrusion (121) define a first positioning groove, and each socket terminal (122) is correspondingly positioned in one first positioning groove.

3. The filter according to claim 1, wherein one end of the socket terminal (122) is provided with a folded portion (1221), the folded portion (1221) abuts against a side wall of the PCB board (2) facing away from the first positioning protrusion (121), the other end of the socket terminal (122) is provided with a first through hole (1222), and one end of the first conductive pillar (13) is inserted into the first through hole (1222).

4. The filter according to claim 3, further comprising two capacitors, wherein the folded portion (1221) is provided with a second through hole (1223), the capacitors are disposed on the base (11), one end of each capacitor passes through one second through hole (1223) and then is plugged into the PCB (2), and the other end of each capacitor is plugged into the PCB (2).

5. A filter according to claim 4, characterized in that a recess (111) is provided in the substrate (11), and both capacitors are provided in the recess (111).

6. A filter according to claim 5, characterised in that the top cover of the recess (111) is provided with an insulating shield (94).

7. The filter according to claim 1, wherein the positioning assembly (12) further comprises a plurality of second positioning protrusions (124), the second positioning protrusions (124) are connected to the base body (11), and the second positioning protrusions (124) abut against one sidewall of the PCB board (2).

8. The filter according to claim 7, wherein each second positioning protrusion (124) is provided with a clamping block (125) in a protruding manner, the end of the PCB (2) is provided with a plurality of clamping slots (21), and the plurality of clamping blocks (125) are clamped in the plurality of clamping slots (21) in a one-to-one correspondence manner.

9. The filter according to claim 1, wherein the socket (1) further includes a second conductive pillar (14), a ground line (15) and a ground terminal (16), the second conductive pillar (14) is disposed through the base (11), the second conductive pillar (14) and the two first conductive pillars (13) are respectively disposed at three corners of a triangle, one end of the second conductive pillar (14) is plugged into the ground terminal (16), the other end of the second conductive pillar is used for electrically connecting the docking device, one end of the ground line (15) is connected to the ground terminal (16), and the other end of the ground line (15) is plugged into the PCB (2).

10. The filter according to claim 9, wherein a first flanging (163) is disposed at a side of the ground terminal (16), a third through hole (164) is disposed on the first flanging (163), and one end of the ground wire (15) is bent to form a hook after passing through the third through hole (164).

11. The filter according to claim 9, further comprising a housing (9), wherein the housing (9) is sleeved outside the socket (1) and the PCB (2), and one end of the ground terminal (16) facing away from the second conductive pillar (14) has a second flange (162), and the second flange (162) is inserted into the housing (9).

12. The filter according to claim 9, wherein a blocking portion (112) is protrudingly provided on the base (11), and the blocking portion (112) is blocked between the ground terminal (16) and the receptacle terminal (122).

13. The filter according to claim 9, characterized in that at least two third positioning protrusions (113) are convexly arranged on the base body (11), at least two third positioning protrusions (113) enclose a second positioning groove, and the grounding terminal (16) is positioned in the second positioning groove.

14. The filter according to any one of claims 1-13, wherein the filter further comprises a housing (9), the housing (9) comprises a middle housing (91), a rear housing (92) and a front cover (93), the middle housing (91) is connected to one end of the base (11) facing the PCB board (2), the rear housing (92) and the front cover (93) are respectively connected to two sides of the middle housing (91), the rear housing (92) is sleeved on the outer side of the PCB board (2), and the front cover (93) is sleeved on the outer side of the socket (1).

15. The filter according to claim 14, wherein the middle housing (91) is a square frame structure, and the middle housing (91) is sleeved outside the PCB (2) and connected to an end surface of the base (11) facing the PCB (2).

16. The filter according to claim 15, characterized in that the middle housing (91) comprises a main frame, a front connecting edge (912) and a rear connecting edge (911), the front connecting edge (912) is connected to the outer edge of the main frame at an angle, the rear connecting edge (911) is connected to the inner edge of the main frame at an angle, the front connecting edge (912) and the rear connecting edge (911) are respectively arranged at two sides of the main frame, the front connecting edge (912) is connected to the inner wall of the front cover (93), and the rear connecting edge (911) is connected to the inner wall of the rear housing (92).

17. The filter according to claim 14, wherein the housing (9) further comprises an insulating sheath (95), the insulating sheath (95) is sleeved outside the PCB board (2), and the middle casing (91) and the rear casing (92) are sleeved outside the insulating sheath (95).

18. The filter according to claim 14, wherein a through groove (931) is opened at an end of the front cover (93), the head of the base body (11) penetrates out of the front cover (93) through the through groove (931), and a gasket (96) is clamped between an inner wall of the through groove (931) and an outer wall of the base body (11).

19. The filter according to any one of claims 1-13, further comprising an X capacitor (3), a first Y capacitor (4), a second Y capacitor (5), a third Y capacitor (6), a fourth Y capacitor (7), and a common mode inductor (8) all connected to the PCB board (2), wherein the X capacitor (3) is connected in parallel to an input end of the common mode inductor (8), a series branch formed by connecting the first Y capacitor (4) and the second Y capacitor (5) in series is connected in parallel to the X capacitor (3), a ground line is provided between the first Y capacitor (4) and the second Y capacitor (5), a series branch formed by connecting the third Y capacitor (6) and the fourth Y capacitor (7) in series is connected in parallel to an output end of the common mode inductor (8), and a ground line is provided between the third Y capacitor (6) and the fourth Y capacitor (7).

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