CN111541434A - Feed-through filter - Google Patents
Feed-through filter Download PDFInfo
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- CN111541434A CN111541434A CN202010438006.2A CN202010438006A CN111541434A CN 111541434 A CN111541434 A CN 111541434A CN 202010438006 A CN202010438006 A CN 202010438006A CN 111541434 A CN111541434 A CN 111541434A
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- terminal
- circuit board
- magnetic bead
- filter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
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Abstract
The application provides a feed-through filter, including the casing that has the holding chamber, install the circuit board in the holding chamber, the magnetic bead that links to each other with the circuit board, install and the circuit board electric capacity on the side towards the magnetic bead, keep away from the first terminal that the side that electric capacity links to each other and keep away from the second terminal that the one end of circuit board links to each other with the magnetic bead with the circuit board. The electric capacity sets up with the inside wall interval of casing, and the one end that the circuit board was kept away from to first terminal stretches out the casing, and the one end that the magnetic bead was kept away from to the second terminal stretches out the casing. This application is through setting up the electric capacity on the circuit board, is the interval setting between the inside wall of electric capacity and casing. When the shell of the feed-through filter is acted by external force, the capacitor arranged at intervals with the inner side wall of the shell is stressed little, and short circuit failure caused by stress vibration cracking of the capacitor due to the feed-through filter can be avoided.
Description
Technical Field
The present application is in the field of filters, and more particularly, to a feedthrough filter.
Background
A feed-through filter is a filter device for suppressing interference of high-frequency harmonics with a signal line, a power supply line, and the like. Feed-through filters currently generally employ a disk-shaped multilayer or tubular ceramic feedthrough capacitor that is welded directly to the inside wall of the housing. However, the ceramic feedthrough capacitor has a large area and a small thickness, and is prone to crack due to stress vibration of the feedthrough filter, resulting in short circuit failure.
Disclosure of Invention
An object of the embodiment of the present application is to provide a feed-through filter, so as to solve the problem that a ceramic feed-through capacitor in the related art is welded on the inner side wall of a housing, and is prone to short-circuit failure due to stress vibration cracking of the feed-through filter.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
there is provided a feed-through filter comprising:
a housing having an accommodating chamber;
the circuit board is arranged in the accommodating cavity;
the magnetic beads are arranged in the accommodating cavity and connected with the circuit board;
the capacitor is arranged on the side surface of the circuit board facing the magnetic beads and is arranged at intervals with the inner side wall of the shell;
one end of the first terminal is connected with the side face, far away from the capacitor, of the circuit board, and the other end of the first terminal extends out of the shell;
and one end of the second terminal is connected with one end of the magnetic bead, which is far away from the circuit board, and the other end of the second terminal extends out of the shell.
In one embodiment, the feed-through filter further comprises an insulating sheet supporting the magnetic beads; the insulating piece install in the holding chamber, the insulating piece is located the electric capacity with between the second terminal.
In one embodiment, the magnetic beads include a first magnetic bead unit and a second magnetic bead unit connected with the first magnetic bead unit; the first magnetic bead unit is arranged on the side surface, facing the circuit board, of the insulating sheet, and one end, far away from the insulating sheet, of the first magnetic bead unit is connected with the circuit board; the second magnetic bead unit is installed on the side of the insulating piece facing the second terminal, and one end of the second magnetic bead unit, which is far away from the insulating piece, is connected with the second terminal.
In one embodiment, a distance between the insulation sheet and the circuit board is greater than a thickness of the capacitor.
In one embodiment, a connecting guide sleeve is convexly arranged at the side end of the shell close to the second terminal, and the connecting guide sleeve is communicated with the shell; the outer peripheral surface of the connecting guide sleeve is provided with external threads, one end, far away from the circuit board, of the magnetic bead extends into the connecting guide sleeve, one end of the second terminal is connected with the magnetic bead, and the other end of the second terminal extends out of the connecting guide sleeve.
In one embodiment, the feed-through filter further comprises a sealant potted in the accommodating cavity.
In one embodiment, a first step portion for stopping the first terminal from rotating or being pulled out in cooperation with the sealant is arranged at one end of the first terminal close to the circuit board; and/or one end of the second terminal close to the magnetic bead is provided with a second step part which is used for matching with the sealant to stop the second terminal from rotating or being pulled out.
In one embodiment, an inner peripheral surface of an end of the housing adjacent to the first terminal is provided with a first internal thread.
In one embodiment, the inner peripheral surface of the end of the housing near the second terminal is provided with a second internal thread.
In one embodiment, the circuit board is in a cylindrical configuration, and a groove is formed in the outer peripheral surface of the circuit board along the central axis direction of the circuit board.
One or more technical solutions in the embodiments of the present application have at least one of the following technical effects: compare in welding the structural design on the casing inside wall with the electric capacity, this application is through setting up the electric capacity on the circuit board, is the interval setting between the inside wall of electric capacity and casing. When the shell of the feed-through filter is acted by external force, the capacitor arranged at intervals with the inner side wall of the shell is stressed little, and short circuit failure caused by stress vibration cracking of the capacitor due to the feed-through filter can be avoided.
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 front view of a feed-through filter provided in an embodiment of the present application;
fig. 2 is a schematic cross-sectional view of a feed-through filter provided in an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a housing provided in an embodiment of the present application;
fig. 4 is a front view of a first terminal or a second terminal provided in an embodiment of the present application;
fig. 5 is a top view of a first terminal or a second terminal provided in an embodiment of the present application;
fig. 6 is a side view of a first terminal or a second terminal provided by an embodiment of the present application;
fig. 7 is a schematic structural diagram of a connection between a circuit board and a capacitor according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a connection between a circuit board and a capacitor according to another embodiment of the present application.
Wherein, in the drawings, the reference numerals are mainly as follows:
1-a shell; 10-an accommodating cavity; 11-connecting the guide sleeve; 110-a housing chamber; 111-external threads; 112-a limiting step part; 12-a first internal thread; 13-a second internal thread;
2-a circuit board; 20-opening pores; 21-a groove;
3-magnetic beads; 31-a first magnetic bead unit; 32-a second magnetic bead unit;
4-a first terminal; 41-a first step; 42-a first support plate; 420-a first via; 43-a first support; 44-a first base; 441-a first cavity;
5-a second terminal; 51-a second step; 52-a second support plate; 520-a second via; 53-a second support seat; 54-a second base; 541-a second cavity;
6-sealing glue; 61-first curing glue; 62-second curing glue;
7-capacitance; 8-insulating sheet.
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 the present application and are not intended to limit the present 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 implicitly indicating 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, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to 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; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1-3, a feedthrough filter provided by the present application will now be described. The feed-through filter comprises a housing 1 with a receiving cavity 10, a circuit board 2, a magnetic bead 3, a capacitor 7, a first terminal 4 and a second terminal 5. The housing 1 may be of cylindrical configuration and may be provided as an upper and lower shell to facilitate assembly and disassembly.
Compared with the structural design that the capacitor 7 is welded on the inner side wall of the shell 1, the capacitor 7 is arranged on the circuit board 2, and the capacitor 7 and the inner side wall of the shell 1 are arranged at intervals. When feed-through filter's casing 1 receives the exogenic action, the electric capacity 7 atress effect that sets up with the inside wall interval of casing 1 is little, can avoid electric capacity 7 to arouse the short circuit inefficacy because of feed-through filter atress vibration fracture.
In one embodiment, referring to fig. 2 and 3, as an embodiment of the feed-through filter provided by the present application, the feed-through filter further includes an insulating sheet 8 supporting the magnetic bead 3; an insulating sheet 8 is mounted in the accommodating cavity 10, the insulating sheet 8 being located between the capacitor 7 and the second terminal 5. This structure through the support of insulating piece 8 to magnetic bead 3, can effectively improve the steadiness of magnetic bead 3 installation, when avoiding feed-through filter to receive the exogenic action, magnetic bead 3 takes place the offset and causes the influence to circuit board 2 or electric capacity 7, and then improves the steadiness of circuit board 2 and electric capacity 7 installation. Wherein, insulating piece 8 can set up to be the cylinder configuration, and the distance between insulating piece 8 and the circuit board 2 is greater than the thickness of electric capacity 7 to can make electric capacity 7 and 8 interval settings of insulating piece, lead to the fact the damage to electric capacity 7 when can avoiding insulating piece 8 to receive the exogenic action. In some embodiments, the thickness of the insulating sheet 8 is less than the thickness of the circuit board 2, thereby reducing the footprint of the insulating sheet 8 and facilitating the fabrication of a less bulky feed-through filter.
In an embodiment, referring to fig. 2, as a specific implementation of the feed-through filter provided by the present application, the magnetic bead 3 includes a first magnetic bead unit 31 and a second magnetic bead unit 32 connected to the first magnetic bead unit 31; the first magnetic bead unit 31 is installed on the side surface of the insulating sheet 8 facing the circuit board 2, and one end of the first magnetic bead unit 31 far away from the insulating sheet 8 is connected with the circuit board 2; the second magnetic bead unit 32 is mounted on the side of the insulating sheet 8 facing the second terminal 5, and one end of the second magnetic bead unit 32 away from the insulating sheet 8 is connected to the second terminal 5. Specifically, first magnetic bead unit 31 and second magnetic bead unit 32 all can be the cylinder configuration, offer the through-hole that supplies the wire to pass on first magnetic bead unit 31 and the second magnetic bead unit 32, and the trompil of the through-hole on the through-hole that communicates on the first magnetic bead unit 31 and the second magnetic bead unit 32 is offered to the middle part of insulating piece 8 to supply the wire to pass. This structure sets up first magnetic bead unit 31 and second magnetic bead unit 32 respectively through the both ends at insulating piece 8, can effectively improve high frequency noise and spike interference on suppression signal line, the power cord to and absorb electrostatic pulse's ability, and then improve the filtering effect. The first magnetic bead units 31 are disposed between the capacitors 7, and the capacitors 7 and the first magnetic bead units 31 are disposed at intervals, so that the feed-through filter is prevented from being affected by an external force on the capacitors 7. The thickness of first magnetic bead unit 31 is greater than the thickness of electric capacity 7, can separate circuit board 2 and insulating piece 8, avoids insulating piece 8 to cause the influence to electric capacity 7.
In one embodiment, referring to fig. 1 to 3, as an embodiment of the feed-through filter provided by the present application, a connection guide 11 is convexly disposed at a side end of the housing 1 close to the second terminal 5, and the connection guide 11 is communicated with the housing 1; the outer peripheral surface of the connecting guide sleeve 11 is provided with an external thread 111, one end of the magnetic bead 3, which is far away from the circuit board 2, extends into the connecting guide sleeve 11, one end of the second terminal 5 extends into the connecting guide sleeve 11 and is connected with the magnetic bead 3, and the other end of the second terminal 5 extends out of the connecting guide sleeve 11. Specifically, the connecting guide sleeve 11 has a containing chamber 110, the containing chamber 110 is communicated with the containing cavity 10 of the housing 1, and the second magnetic bead unit 32 is disposed in the containing chamber 110. This structure, through set up external screw thread 111 on the outer peripheral face of connecting guide pin bushing 11, be convenient for with feed-through filter and external device be connected, the installation and the dismantlement of feed-through filter of being convenient for. The diameter of the bottom surface of the connecting guide sleeve 11 is smaller than that of the bottom surface of the shell 1, and a step part is formed between the connecting guide sleeve 11 and the shell 1. When the feed-through filter is connected with an external device, the step part can play a certain limiting and resisting role. The inner peripheral surface of the connecting guide sleeve 11 is provided with a limiting step portion 112 for resisting the second magnetic bead unit 32, so that the second magnetic bead unit 32 can be conveniently positioned and installed. In some embodiments, the length of the supporting surface of the limiting step 112 is greater than or equal to the thickness of the second magnetic bead unit 32 along the central axis of the housing 1, so that the second magnetic bead unit 32 can be completely supported. In some embodiments, the length of the supporting surface of the limiting step 112 is less than the thickness of the second magnetic bead unit 32 and greater than half of the thickness of the second magnetic bead unit 32. The one end that second magnetic bead unit 32 is close to circuit board 2 can stretch out and connect guide pin bushing 11, and the interval sets up between the corresponding inside wall of second magnetic bead unit 32 and casing 1, can supply sealed glue 6 to stretch into, further strengthens the sealed fixed effect to second magnetic bead unit 32. The diameter of the bottom surface of the accommodating chamber 110 may be smaller than the diameter of the bottom surface of the accommodating chamber 10, the diameter of the bottom surface of the second magnetic bead unit 32 may be larger than the diameter of the bottom surface of the first magnetic bead unit 31, the thickness of the second magnetic bead unit 32 may be larger than the thickness of the first magnetic bead unit 31, and effective support of the insulating sheet 8 and the first magnetic bead unit 31 may be achieved.
In one embodiment, referring to fig. 2 and 3, as an embodiment of the feed-through filter provided by the present application, the feed-through filter further includes a sealant 6 encapsulated in the accommodating cavity 10. By the structure, the sealing glue 6 is filled and sealed in the accommodating cavity 10, so that the circuit board 2, the capacitor 7, the magnetic beads 3, the first terminal 4 and the second terminal 5 can be connected and fixed, and the vibration resistance and the shock resistance of the feed-through filter can be effectively improved. Specifically, the outer peripheral face of circuit board 2 and the outer peripheral face of insulating piece 8 are the interval setting with the inside wall of casing 1 respectively, and sealed glue 6 of being convenient for fills the clearance to improve circuit board 2 and insulating piece 8's sealed fixed effect. The sealant 6 includes a first curing adhesive 61 encapsulated between the circuit board 2 and the insulating sheet 8, and a second curing adhesive 62 encapsulated between the circuit board 2 and the opening end of the housing 1 near the first terminal 4 and encapsulated in the accommodating chamber 110. The first curing glue 61 may be a 518A/B glue, and the second curing glue 62 may be a G500 glue, which is not limited herein. The 518A/B adhesive has the anti-yellowing effect in addition to the high bonding strength, high hardness and high chemical resistance of the common epoxy resin adhesive. Even if the coating is scraped on a vertical surface or a suspended ceiling, the coating does not flow, is moderate in drying and solidification, and is safe and environment-friendly. The G500 adhesive is a single-component and thermosetting universal epoxy adhesive and sealant. It is a low viscosity. Easy pumping, friction resistance, good collapse resistance and long storage period at room temperature. The cured product has good surface brightness, high-temperature strength, and excellent heat resistance, water resistance and dielectric properties.
The feed-through filter is assembled in the following manner:
1. arranging the capacitor 7 on the circuit board 2, arranging the first magnetic bead unit 31 and the second magnetic bead unit 32 on two sides of the insulating sheet 8 respectively, and connecting the first magnetic bead unit 31 with the circuit board 2;
2. extending the insulating sheet 8 into the accommodating cavity 10 from the opening end of the housing 1 close to the first terminal 4, so that the second magnetic bead unit 32 extends into the accommodating chamber 110;
3. encapsulating a first curing adhesive 61 into the accommodating cavity 10, so that the first curing adhesive 61 fills gaps among the circuit board 2, the insulating sheet 8 and the inner side wall of the shell 1;
4. and a second curing adhesive 62 is filled between the circuit board 2 and the opening end of the housing 1 close to the first terminal 4 and in the accommodating chamber 110, so that the first terminal 4 and the second terminal 5 are fixed. In some embodiments, an inner circumferential surface of the accommodating chamber 110 facing the second magnetic bead unit 32 is provided with an inner thread, and the second curing adhesive 62 can extend into the inner thread, so as to improve the connection strength between the second magnetic bead unit 32 and the connection guide sleeve 11, and improve the installation stability of the second magnetic bead unit 32.
Wherein, sealed glue 6 of embedment is sealed to this application adoption vacuum embedment technology many times in to holding chamber 10 to guarantee feed through filter's sealing performance, and guarantee that feed through filter is inside bubble-free, make feed through filter reach the requirement of ability normal use under the environment under the low pressure.
In an embodiment, referring to fig. 4 to fig. 6, as a specific implementation of the feed-through filter provided by the present application, a first step portion 41 for cooperating with the sealant 6 to stop the first terminal 4 from rotating or being pulled out is disposed at an end of the first terminal 4 close to the circuit board 2; and/or a second step part 51 used for matching with the sealant 6 to stop the rotation or pull-out of the second terminal 5 is arranged at one end of the second terminal 5 close to the magnetic bead 3. With the structure, after the second curing glue 62 is filled and sealed, the second curing glue 62 extends into the first step part 41, the vertical surface of the first step part 41 can be blocked by the second curing glue 62, and the first terminal 4 can be prevented from being pulled out along the central axis direction of the shell 1 under the action of external force. The horizontal surface of the first step portion 41 can also be resisted by the second curing adhesive 62, so that the first terminal 4 can be prevented from rotating along the circumferential direction of the housing 1 under the action of external force. The vertical surface of the second step 51 can be blocked by the second curing adhesive 62, so that the second terminal 5 can be prevented from being pulled out along the central axis of the housing 1 under the action of external force. The horizontal surface of the second step 51 can also be resisted by the second curing adhesive 62, so that the second terminal 5 can be prevented from rotating along the circumferential direction of the housing 1 under the action of external force.
In some embodiments, referring to fig. 4 to 6, the first terminal 4 includes a first supporting plate 42, a first supporting seat 43 mounted on the first supporting plate 42, and a first base 44 mounted on the first supporting seat 43, the first supporting seat 43 is disposed at one end of the first supporting plate 42, the other end of the first supporting plate 42 extends out of the housing 1, and a first through hole 420 is formed at one end of the first supporting plate 42 extending out of the housing 1 for facilitating connection with an external device. The length of the first supporting seat 43 is greater than that of the first base 44, and the top surface of the first supporting seat 43 and the corresponding side surface of the first base 44 form the first step portion 41. The first base 44 has a first cavity 441 along the length direction of the first base 44 for a lead to pass through and be connected to an external device. Similarly, the second terminal 5 includes a second supporting plate 52, a second supporting seat 53 mounted on the second supporting plate 52, and a second base 54 mounted on the second supporting seat 53, the second supporting seat 53 is disposed at one end of the second supporting plate 52, the other end of the second supporting plate 52 extends out of the housing 1, specifically, extends out of the connecting guide 11, and a second through hole 520 is formed at one end of the second supporting plate 52 extending out of the housing 1, so as to facilitate connection with an external device. The length of the second support seat 53 is greater than that of the second base 54, and the top surface of the second support seat 53 and the corresponding side surface of the second base 54 form the second step portion 51. The second base 54 has a second cavity 541 along the length direction of the second base 54 for the wire to pass through and connect with the external device.
In one embodiment, referring to fig. 2 and 3, as an embodiment of the feed-through filter provided by the present application, an inner peripheral surface of an end of the housing 1 near the first terminal 4 is provided with a first internal thread 12. This structure, when sealed glue 6 of embedment, sealed glue 6 can stretch into in first internal thread 12 to the realization is to sealed fixed of glue 6, avoids the smooth problem that leads to sealed glue 6 to drop of inner peripheral surface of casing 1, thereby can effectively improve the fixed effect to first terminal 4. In some embodiments, a plurality of slots are spaced on an inner peripheral surface of one end of the housing 1 close to the first terminal 4, and the sealant 6 can extend into the slots to be fixed.
In one embodiment, referring to fig. 2 and 3, as an embodiment of the feed-through filter provided by the present application, a second internal thread 13 is provided on an inner peripheral surface of an end of the housing 1 near the second terminal 5. This structure, when sealed glue 6 of embedment, sealed glue 6 can stretch into in the second internal thread 13 to the realization is to sealed fixed of glue 6, avoids the smooth problem that leads to sealed glue 6 to drop of inner peripheral surface of casing 1, thereby can effectively improve the fixed effect to second terminal 5. In some embodiments, a plurality of slots are spaced on the inner peripheral surface of one end of the housing 1 close to the second terminal 5, and the sealant 6 can extend into the slots to fix the terminals.
In one embodiment, referring to fig. 7 and 8, as a specific implementation of the feed-through filter provided by the present application, the circuit board 2 is in a cylindrical configuration, and a groove 21 is formed on an outer peripheral surface of the circuit board 2 along a central axis direction of the circuit board 2. With the structure, when the sealant 6 is encapsulated, the sealant 6 can extend into the groove 21, so that the sealing and fixing effect on the circuit board 2 can be improved. The circuit board 2 has an opening 20 formed in a middle portion thereof, and the opening 20 is in communication with the first cavity 441 of the first terminal 4 for a wire to pass through. The quantity of recess 21 can be two, and two recesses 21 are the symmetric distribution with the axis of circuit board 2, can further improve the sealed fixed effect to circuit board 2. The cross section of each groove 21 is semicircular, so that the processing and the manufacturing are convenient. In other embodiments, the number, configuration, etc. of the grooves 21 can be adjusted according to actual needs, and are not limited herein.
In some embodiments, referring to fig. 7 and 8, the capacitor 7 is a sheet structure, and the capacitor 7 is disposed on the circuit board 2 in a ring array; the number of the capacitors 7 can be adjusted according to actual needs, such as two, four, six, etc., which are sufficient to meet the working requirements, and is not limited herein. The capacitor 7 is a chip capacitor, and the chip capacitor has the characteristics of large capacity, small volume, easiness in chip formation and the like. In order to obtain materials conveniently, the chip capacitor is a chip type laminated ceramic dielectric capacitor, wherein the chip type laminated ceramic capacitor is called as a chip type laminated capacitor (or further called as a chip capacitor) for short, ceramic dielectric diaphragms with printed electrodes (inner electrodes) are overlapped in a staggered mode, a ceramic chip is formed through one-time high-temperature sintering, and metal layers (outer electrodes) are sealed at two ends of the chip, so that a structure body similar to a monolithic body is formed, and the chip type laminated ceramic capacitor is also called as a monolithic capacitor. The main component of the commonly used ceramic media is MgTiO3、CaTiO3、SrTiO3And TiO2And adding a proper amount of rare earth oxide to prepare the catalyst. It features large dielectric coefficient, low dielectric loss, small temperature coefficient, wide range of application for ambient temperature and good high-frequency characteristics, and is used in the place with high requirement (I-class porcelain dielectric container).
The feed-through filter provided by the application has at least the following beneficial effects:
(1) the method can solve the problem that the guide post is short-circuited and fails because the traditional ceramic feed-through core is easy to vibrate and crack due to stress of the feed-through filter;
(2) the first step part 41 and the second step part 51 can prevent the first terminal 4 and the second terminal 5 from rotating and plugging, and the connection stability of the first terminal 4 and the second terminal 5 is good;
(3) the sealing glue 6 is filled and sealed in the shell 1, so that the vibration resistance and the shock resistance of the feed-through filter can be improved;
(4) the feed-through filter can meet military requirements and meet the test requirements of GJB1518A-2015 and GJB 360B.
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. A feed-through filter, comprising:
a housing having an accommodating chamber;
the circuit board is arranged in the accommodating cavity;
the magnetic beads are arranged in the accommodating cavity and connected with the circuit board;
the capacitor is arranged on the side surface of the circuit board facing the magnetic beads and is arranged at intervals with the inner side wall of the shell;
one end of the first terminal is connected with the side face, far away from the capacitor, of the circuit board, and the other end of the first terminal extends out of the shell;
and one end of the second terminal is connected with one end of the magnetic bead, which is far away from the circuit board, and the other end of the second terminal extends out of the shell.
2. The feedthrough filter of claim 1, wherein: the feed-through filter further comprises an insulating sheet supporting the magnetic beads; the insulating piece install in the holding chamber, the insulating piece is located the electric capacity with between the second terminal.
3. The feedthrough filter of claim 2, wherein: the magnetic beads comprise a first magnetic bead unit and a second magnetic bead unit connected with the first magnetic bead unit; the first magnetic bead unit is arranged on the side surface, facing the circuit board, of the insulating sheet, and one end, far away from the insulating sheet, of the first magnetic bead unit is connected with the circuit board; the second magnetic bead unit is installed on the side of the insulating piece facing the second terminal, and one end of the second magnetic bead unit, which is far away from the insulating piece, is connected with the second terminal.
4. The feedthrough filter of claim 2, wherein: the distance between the insulation sheet and the circuit board is larger than the thickness of the capacitor.
5. The feedthrough filter of claim 1, wherein: a connecting guide sleeve is convexly arranged at the side end of the shell close to the second terminal and is communicated with the shell; the outer peripheral surface of the connecting guide sleeve is provided with external threads, one end, far away from the circuit board, of the magnetic bead extends into the connecting guide sleeve, one end of the second terminal is connected with the magnetic bead, and the other end of the second terminal extends out of the connecting guide sleeve.
6. The feedthrough filter of claim 1, wherein: the feed-through filter further comprises a sealing glue encapsulated in the accommodating cavity.
7. The feedthrough filter of claim 6, wherein: a first step part which is used for matching with the sealant to stop the first terminal from rotating or being pulled out is arranged at one end of the first terminal, which is close to the circuit board; and/or one end of the second terminal close to the magnetic bead is provided with a second step part which is used for matching with the sealant to stop the second terminal from rotating or being pulled out.
8. The feedthrough filter of any of claims 1-7, wherein: the inner peripheral surface of one end of the shell close to the first terminal is provided with a first internal thread.
9. The feedthrough filter of any of claims 1-7, wherein: the inner peripheral surface of one end of the shell close to the second terminal is provided with a second internal thread.
10. The feedthrough filter of any of claims 1-7, wherein: the circuit board is in a cylindrical configuration, and grooves are formed in the outer peripheral surface of the circuit board along the central axis direction of the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010438006.2A CN111541434A (en) | 2020-05-21 | 2020-05-21 | Feed-through filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010438006.2A CN111541434A (en) | 2020-05-21 | 2020-05-21 | Feed-through filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111541434A true CN111541434A (en) | 2020-08-14 |
Family
ID=71976186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010438006.2A Pending CN111541434A (en) | 2020-05-21 | 2020-05-21 | Feed-through filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111541434A (en) |
-
2020
- 2020-05-21 CN CN202010438006.2A patent/CN111541434A/en active Pending
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