Capacitive coupling assembly and filter

Abstract

The utility model relates to the field of communication, and provides a capacitive coupling assembly and a filter. The capacitive coupling assembly comprises a coupling piece and a mounting piece, and a mounting hole penetrates through the coupling piece; the mounting piece is an insulating piece, the two opposite sides of the mounting piece in the axial direction abut against the first plate piece and the second plate piece respectively, the mounting piece is limited relative to the plane of at least one of the first plate piece and the second plate piece, the mounting piece is provided with a buckling part, and the buckling part penetrates through the mounting hole and is buckled and matched with the mounting hole in an axial limiting mode. Based on the above structure, the installation piece can support and fix the coupling piece and enable the coupling piece to be not grounded through a simplified and optimized structure, compared with an installation structure of an existing capacitive coupling assembly, the number of parts can be obviously reduced, and therefore the capacitive coupling assembly can simplify and optimize the structure, reduce the number of the parts, shorten a tolerance chain and improve the installation efficiency. Therefore, the accumulated tolerance can be reduced, the assembly process can be simplified and optimized, and the installation reliability, the assembly convenience and the assembly efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a capacitive coupling assembly and a filter. BACKGROUND

[0002] In some cases, the filter includes a filter housing, a plurality of resonant rods arranged in the filter housing, and a capacitive coupling assembly arranged between two resonant rods. The capacitive coupling assembly includes a coupling sheet and a mounting structure, the coupling sheet extends from one resonant rod to another resonant rod and enables capacitive coupling of the two resonant rods, the coupling sheet has a mounting hole corresponding to the mounting structure, the mounting structure includes a non-metallic screw and a non-metallic gasket, the non-metallic gasket is arranged between the coupling sheet and the filter housing, the non-metallic screw has a head and a pin, the head of the non-metallic screw is stopped at the hole of the mounting hole away from the non-metallic gasket, the pin of the non-metallic screw is arranged in the mounting hole and the non-metallic gasket, and is screwed to the filter housing. Based on this, the coupling sheet can be fixed to the filter housing through the non-metallic screw and the non-metallic gasket, and the coupling sheet and the filter housing can be insulated, so that the coupling sheet is not grounded, thereby enabling the two resonant rods to be capacitive coupled.

[0003] However, the capacitive coupling assembly has a large number of parts, a long tolerance chain, a large cumulative tolerance, and poor installation reliability. CONTENT OF THE UTILITY MODEL

[0004] The capacitive coupling assembly provided by the embodiments of the present application aims to solve the problem of a large number of parts, a long tolerance chain, a large cumulative tolerance, and poor installation reliability of the existing capacitive coupling assembly.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In a first aspect, a capacitive coupling assembly is provided, which is arranged in a filter housing, the filter housing has opposite first and second plate members, and the capacitive coupling assembly includes:

[0007] A coupling member has a mounting hole;

[0008] A mounting member is an insulating member, which is abutted to the first and second plate members on opposite sides in the axial direction of the mounting member, and is limited in the plane relative to at least one of the first and second plate members, the mounting member has a buckle portion, which is arranged in the mounting hole and is axially limited and buckled to the mounting hole.

[0009] In some embodiments, the outer periphery of the buckle portion is provided with a buckle protrusion, the buckle protrusion is buckled to one side of the mounting hole, the mounting member is provided with a stop portion, the stop portion is sequentially connected to the buckle portion along the axial direction of the mounting member, and the stop portion is stopped at the other side of the mounting hole.

[0010] In some embodiments, the buckle portion is provided with a cutting groove, the cutting groove is provided along its extending direction, the extending direction of the cutting groove is perpendicular to the axial direction of the mounting member, the cutting groove is provided along its depth direction, and the depth direction of the cutting groove is parallel to the axial direction of the mounting member.

[0011] In some embodiments, the cutting groove is arranged on the end face of the buckle portion close to the stop portion.

[0012] In some embodiments, the cutting groove is provided with two cutting grooves, and the two cutting grooves are symmetrically distributed about the central axis of the mounting member.

[0013] In some embodiments, the outer periphery of the buckle portion is provided with a guide taper surface, the guide taper surface is located on the side of the buckle protrusion away from the stop portion, and the radial dimension of the guide taper surface is gradually reduced in the direction away from the buckle protrusion.

[0014] In some embodiments, the first plate member is provided with a connecting hole at the position corresponding to the mounting member, the mounting member is provided with a connecting portion connected to the buckle portion, and the connecting portion is inserted into the connecting hole.

[0015] In some embodiments, the connecting portion abuts against the bottom of the connecting hole.

[0016] In some embodiments, the connecting portion is inserted into the connecting hole in an interference fit.

[0017] In some embodiments, the mounting member is interference-fitted between the first plate member and the second plate member.

[0018] In some embodiments, at least one end of the mounting member along the axial direction is provided with a protrusion.

[0019] In some embodiments, the mounting member is an integral structure.

[0020] In a second aspect, a filter is provided, including a filter housing and the capacitive coupling assembly provided in the embodiments of the application.

[0021] The capacitive coupling assembly provided in the application has the following beneficial effects:

[0022] The capacitive coupling assembly provided by the embodiments of the present application can support and fix the coupling element through the mounting element and make the coupling element not grounded, and can realize capacitive coupling of the two resonant rods through the coupling element. The mounting element can pass through the mounting hole of the coupling element through the buckle part and be axially limitedly buckled and matched with the mounting hole to support and fix the coupling element, and stabilize the mounting position and mounting state of the coupling element relative to the mounting element and the filter shell, especially the height position of the coupling element in the axial direction of the mounting element, and especially make the coupling element stably and reliably insulated and spaced apart from the first plate and the second plate. The mounting element can also be limited in the plane relative to at least one of the first plate and the second plate by abutting the first plate and the second plate on the opposite sides, to realize the stable mounting position and mounting state of the mounting element between the first plate and the second plate. Therefore, the mounting element can support and fix the coupling element and make the coupling element not grounded in a simplified and optimized structure, and compared with the mounting structure composed of multiple components of the existing capacitive coupling assembly, the mounting element as an individual component can obviously reduce the number of components. Therefore, the capacitive coupling assembly of the embodiments can simplify and optimize the structure, reduce the number of components, shorten the tolerance chain, reduce the cumulative tolerance, simplify and optimize the assembly process, and improve the installation reliability, assembly convenience and assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0024] Figure 1 The three-dimensional schematic view of the filter provided by some embodiments of the present application is shown in the figure.

[0025] Figure 2 The sectional view of the filter provided by some embodiments of the present application is shown in the figure.

[0026] Figure 3 The three-dimensional schematic view of the filter provided by some embodiments of the present application is shown in the figure. Figure 2 The exploded schematic view of the capacitive coupling assembly provided by some embodiments of the present application is shown in the figure. Figure 1 ;

[0027] Figure 4 The exploded schematic view of the capacitive coupling assembly provided by some embodiments of the present application is shown in the figure. Figure 2 . Figure 2 In the figure, various reference signs represent:

[0028]

[0029] ​10 - capacitive coupling assembly, 11 - coupling piece, 111 - mounting hole; 12 - mounting piece, 121 - buckle part, 1211 - buckle protrusion, 1212 - truncated groove, 1213 - guide cone, 122 - stop part, 123 - connecting part, 124 - protrusion, x - extension direction of the truncated groove, y - axial direction of the mounting piece, L - central axis of the mounting piece; 20 - filter housing, 21 - first plate piece, 211 - boss, 2111 - connecting hole, 22 - second plate piece; 30 - resonant rod, 30a - first resonant rod, 30b - second resonant rod, 30c - third resonant rod. DETAILED DESCRIPTION

[0030] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions. If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0031] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, the "central axis" refers to a line passing through the geometric center line of the corresponding structure. The "axial direction" refers to the extension direction of the central axis of the corresponding structure, the "radial direction" refers to any direction of the corresponding structure passing through the central axis and perpendicular to the central axis, and the "circumferential direction" refers to the circumferential direction of the outer circumferential surface of the corresponding structure.

[0035] In some cases, the filter includes a filter housing, a plurality of resonant rods arranged in the filter housing, and a capacitive coupling assembly arranged between two resonant rods. The capacitive coupling assembly includes a coupling sheet and a mounting structure, the coupling sheet extends from one resonant rod to another resonant rod and enables capacitive coupling of the two resonant rods, the coupling sheet has a mounting hole arranged corresponding to the mounting structure, the mounting structure includes a non-metallic screw and a non-metallic gasket, the non-metallic gasket is arranged between the coupling sheet and the filter housing, the non-metallic screw has a head and a pin, the head of the non-metallic screw is stopped at the hole of the mounting hole away from the non-metallic gasket, and the pin of the non-metallic screw is arranged in the mounting hole and the non-metallic gasket and is screwed to the filter housing. Based on this, the coupling sheet can be fixed to the filter housing through the non-metallic screw and the non-metallic gasket, and the coupling sheet and the filter housing can be arranged in an insulated manner, so that the coupling sheet is not grounded, thereby enabling the two resonant rods to be capacitive coupled.

[0036] However, the capacitive coupling assembly has a large number of components, a long tolerance chain (i.e., a cumulative tolerance chain of machining and assembly errors of the non-metallic screw, the non-metallic gasket, the coupling sheet, and the filter housing), a large cumulative tolerance, and poor installation reliability. Moreover, the non-metallic screw can withstand a small torque, which leads to a fracture of the non-metallic screw during installation, thereby affecting the assembly yield and efficiency; and leads to loosening of the non-metallic screw during reliability testing of the filter product, thereby resulting in poor consistency and quality of the filter product and a high failure rate of the filter product.

[0037] The embodiments provided in the present application will solve the above problems.

[0038] In order to illustrate the technical solutions provided in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0039] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4Some embodiments of the present application provide a capacitive coupling assembly 10 arranged in a filter housing 20, the filter housing 20 having opposite first and second plate members 21 and 22, the capacitive coupling assembly 10 comprising a coupling member 11 and a mounting member 12, the coupling member 11 having a mounting hole 111 therethrough; the mounting member 12 being an insulating member, the mounting member 12 abutting against the first and second plate members 21 and 22 along opposite axial sides thereof respectively, the mounting member 12 being planarly limited relative to at least one of the first and second plate members 21 and 22, the mounting member 12 having a buckle portion 121 buckled and axially limitedly engaged with the mounting hole 111.

[0040] It should be noted that the capacitive coupling assembly 10 can be applied to a filter product. The filter comprises the filter housing 20. The inside of the filter housing 20 has a closed inner cavity, which can achieve a shielding function to prevent signal leakage. The plate member on one side of the filter housing 20 is the first plate member 21, and the plate member on the side opposite to the first plate member 21 of the filter housing 20 is the second plate member 22. In actual application scenarios, the filter can be placed in a posture with the second plate member 22 facing upwards, or in a posture with the second plate member 22 facing left, right, front or back. In addition, the shape, size, material and the like of the filter housing 20 can be flexibly set as needed.

[0041] The filter further comprises a plurality of resonant rods 30 arranged in the filter housing 20. The plurality of resonant rods 30 are arranged as needed to establish a required coupling relationship. Among them, one end of the resonant rod 30 is connected and fixed to the wall portion (such as the first plate member 21 or the second plate member 22, etc.) of the filter housing 20. The resonant rod 30 can be connected and fixed to the filter housing 20 in a manner such as but not limited to integral connection, welding, screw fastening, threaded connection, riveting, pressure connection, clamping, etc. Among them, the resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod of other materials; the resonant rod 30 can be a hollow resonant rod or a solid resonant rod; the resonant rod 30 can have a resonant disc or not; the resonant disc can have a flange or not; the resonant rod 30 can be a circular rod, a polygonal rod, a special-shaped rod, a sheet-shaped resonant rod, a sheet metal resonant rod, or a resonant rod of other shapes, etc.

[0042] The capacitive coupling assembly 10 can be arranged between any two resonant rods 30 to enable capacitive coupling between the two resonant rods 30.

[0043] In the case that the number of the resonant rods 30 is at least three, the capacitive coupling assembly 10 can be arranged between two non-adjacent resonant rods 30 to realize capacitive cross-coupling of the two resonant rods 30. The two non-adjacent resonant rods 30 are non-adjacent in the main signal transmission path, that is, the coupling realized by the capacitive coupling assembly 10 between the two resonant rods 30 is cross-coupling, that is, the coupling relationship between the two resonant rods 30 is non-cascading. For example, as shown in Figure 2 In the specific example of the filter, three resonant rods 30 are arranged in the filter housing 20, and the three resonant rods 30 are a first resonant rod 30a, a second resonant rod 30b, and a third resonant rod 30c. The path of the first resonant rod 30a, the second resonant rod 30b, and the third resonant rod 30c is the main signal transmission path, and the first resonant rod 30a and the third resonant rod 30c are non-adjacent in the main signal transmission path. The capacitive coupling assembly 10 can be arranged between the non-adjacent first resonant rod 30a and the third resonant rod 30c to realize capacitive cross-coupling of the first resonant rod 30a and the third resonant rod 30c.

[0044] Of course, the capacitive coupling assembly 10 can also be arranged between two adjacent resonant rods 30 to realize capacitive coupling of the two resonant rods 30. The two adjacent resonant rods 30 are adjacent in the main signal transmission path, that is, the coupling realized by the capacitive coupling assembly 10 between the two resonant rods 30 is the coupling relationship in the main signal transmission path, that is, the coupling relationship between the two resonant rods 30 is cascading.

[0045] It should be further noted that the capacitive coupling assembly 10 includes a coupling member 11, which is a metal member, or the coupling member 11 is a non-metal member with a metal layer on the surface. At least one end of the coupling member 11 in the extension direction is not grounded, that is, one end of the coupling member 11 in the extension direction is not grounded, and the other end is grounded, or both ends of the coupling member 11 in the extension direction are not grounded. The ground setting means that the end of the coupling member 11 is in conductive connection with the filter housing 20, and the non-ground setting means that the end of the coupling member 11 is insulated from (that is, not in conductive connection with) the filter housing 20. The coupling member 11 can extend from one resonant rod 30 to another resonant rod 30 to realize capacitive coupling of the two resonant rods 30. The coupling member 11 can be, but is not limited to, a sheet, a rod, and the like.

[0046] The capacitive coupling assembly 10 further comprises at least one mounting member 12, which is an insulating member, i.e., the mounting member 12 is made of an insulating material and has insulating properties, and is exemplarily a non-metallic member. The at least one mounting member 12 is arranged at an end of the coupling member 11 to support and fix the end of the coupling member 11 and to arrange the end of the coupling member 11 in a non-grounded manner. On this basis, part of the mounting member 12 is arranged in a non-end region (e.g., a middle region) of the coupling member 11 to support and fix the corresponding region of the coupling member 11. Correspondingly, the coupling member 11 is provided with mounting holes 111 corresponding to the mounting members 12, which are through holes and pass through the coupling member 11. The mounting holes 111 can be circular holes, rectangular holes, etc. as needed, and the size of the mounting holes 111 can be set as needed.

[0047] The mounting member 12 is an individual component rather than an assembly formed by assembling multiple components. The axial direction y of the mounting member 12 is the extension direction of the central axis L of the mounting member 12. The opposite sides of the mounting member 12 in the axial direction y abut against the first plate member 21 and the second plate member 22, respectively, and the mounting member 12 can be interference fit or transition fit between the first plate member 21 and the second plate member 22. Based on this, since the opposite sides of the mounting member 12 abut against the first plate member 21 and the second plate member 22, respectively, the mounting member 12 can be limited to be installed between the first plate member 21 and the second plate member 22 and be limited to move in the axial direction y of the mounting member 12, thereby preliminarily stabilizing the installation position and installation state of the mounting member 12 between the first plate member 21 and the second plate member 22.

[0048] The mounting member 12 is limited in the plane relative to at least one of the first plate member 21 and the second plate member 22. That is, the mounting member 12 can be limited in the plane relative to the first plate member 21, the mounting member 12 can be limited in the plane relative to the second plate member 22, or the mounting member 12 can be limited in the plane relative to both the first plate member 21 and the second plate member 22, to realize positioning and stabilizing the planar position of the mounting member 12 relative to the first plate member 21 and the second plate member 22, and limit the planar movement of the mounting member 12 relative to the first plate member 21 and the second plate member 22, thereby optimizing the installation position and installation state of the mounting member 12 between the first plate member 21 and the second plate member 22. Among them, the mounting member 12 can be interference fit between the first plate member 21 and the second plate member 22 to basically stabilize the planar position of the mounting member 12 relative to the first plate member 21 and the second plate member 22 by means of friction; the mounting member 12 can also be completely fixed by being bonded or welded with at least one of the first plate member 21 and the second plate member 22; the mounting member 12 can also be relatively limited by being inserted into the hole of at least one of the first plate member 21 and the second plate member 22; and the like.

[0049] The mounting member 12 has a buckle portion 121. The buckle portion 121 is located at a middle region of the mounting member 12 in the axial direction y of the mounting member 12. The buckle portion 121 is arranged in the mounting hole 111 of the coupling member 11 and is buckled and axially limited with the mounting hole 111, so that the coupling member 11 is axially limited relative to the mounting member 12 and is spaced between the first plate member 21 and the second plate member 22. In this way, the movement of the coupling member 11 in the axial direction y of the mounting member 12 can be limited, and the installation position and state of the coupling member 11 relative to the mounting member 12 and the filter housing 20 can be stabilized, especially the height position of the coupling member 11 in the axial direction y of the mounting member 12 can be stabilized, and the coupling member 11 can be stably and reliably insulated and spaced from the first plate member 21 and the second plate member 22.

[0050] In summary, the capacitive coupling assembly 10 provided by the embodiment of the present application can support and fix the coupling member 11 by the mounting member 12 and make the coupling member 11 not grounded, and can realize the capacitive coupling of the two resonant rods 30 by the coupling member 11. The mounting member 12 can be arranged in the mounting hole 111 of the coupling member 11 by the buckle portion 121 and buckled and axially limited with the mounting hole 111 to support and fix the coupling member 11 and stabilize the installation position and state of the coupling member 11 relative to the mounting member 12 and the filter housing 20, especially the height position of the coupling member 11 in the axial direction y of the mounting member 12, and especially to make the coupling member 11 stably and reliably insulated and spaced from the first plate member 21 and the second plate member 22. The mounting member 12 can also be limited in the plane relative to at least one of the first plate member 21 and the second plate member 22 by abutting against the first plate member 21 and the second plate member 22 on the opposite sides, to realize the installation position and state of the mounting member 12 between the first plate member 21 and the second plate member 22. In this way, the mounting member 12 can support and fix the coupling member 11 and make the coupling member 11 not grounded with a simplified and optimized structure, and compared with the mounting structure of the existing capacitive coupling assembly composed of multiple components, the mounting member 12 as an individual component can significantly reduce the number of components. Therefore, the capacitive coupling assembly 10 of the embodiment can simplify and optimize the structure, reduce the number of components, shorten the tolerance chain, reduce the cumulative tolerance, simplify and optimize the assembly process, and improve the installation reliability, assembly convenience and assembly efficiency.

[0051] In addition, the controllability and stability of the height position of the coupling member 11 in the axial direction y of the mounting member 12 can be improved, so that the consistency and usability of the capacitive coupling assembly 10 can be improved, the consistency, quality and yield of the filter using the capacitive coupling assembly 10 can be improved, and the failure rate and debugging cost of the filter using the capacitive coupling assembly 10 can be reduced.

[0052] And, the mounting member 12 of the embodiment does not need to be threaded as the non-metallic screw of the existing capacitive coupling assembly, the torque that the mounting member 12 can bear is larger, the connection strength, the connection stability and the connection reliability between the mounting member 12 and the filter housing 20 and between the mounting member 12 and the coupling member 11 are all better, thus, the mounting member 12 of the embodiment is not prone to breakage during installation, thereby facilitating to improve the assembly yield, the assembly efficiency and the product reliability of the capacitive coupling assembly 10 and the filter; the mounting member 12 of the embodiment is also not prone to looseness during the reliability test of the filter product, thereby facilitating to improve the consistency and the usability of the capacitive coupling assembly 10, facilitating to improve the consistency, the quality and the yield of the filter applying the capacitive coupling assembly 10, and facilitating to reduce the failure rate, the test cost and the debugging cost of the filter applying the capacitive coupling assembly 10.

[0053] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the outer periphery of the buckle portion 121 is provided with a buckle protrusion 1211, the buckle protrusion 1211 is buckled to one side hole edge of the mounting hole 111, the mounting member 12 has a stop portion 122, the stop portion 122 and the buckle portion 121 are connected in sequence along the axial direction y of the mounting member 12, and the stop portion 122 is stopped at the other side hole edge of the mounting hole 111.

[0054] It should be noted that the mounting member 12 includes the buckle portion 121 and the stop portion 122, and the buckle portion 121 and the stop portion 122 are integrally connected in sequence along the axial direction y of the mounting member 12. Among them, the stop portion 122 can be arranged on the side of the buckle portion 121 close to the first plate member 21, or on the side of the buckle portion 121 close to the second plate member 22. Among them, the form of the stop portion 122 can be set as needed, for example, it can be prismatic, cylindrical, prismatic, circular, stepped, etc.

[0055] The outer periphery of the buckle portion 121 is provided with a buckle protrusion 1211, the buckle protrusion 1211 is outwardly provided relative to the outer peripheral wall of the buckle portion 121 to form, and the buckle protrusion 1211 and the stop portion 122 are arranged in sequence along the axial direction y of the mounting member 12. The buckle portion 121 is arranged in the mounting hole 111 until the buckle protrusion 1211 passes out of the mounting hole 111 and is buckled to one side hole edge of the mounting hole 111. The stop portion 122 is stopped at the other side hole edge of the mounting hole 111. That is, the buckle protrusion 1211 and the stop portion 122 are stopped at the opposite two side hole edges of the mounting hole 111. Based on this, the mounting member 12 can be buckled and matched with the mounting hole 111 through the buckle protrusion 1211 of the buckle portion 121, and the coupling member 11 is axially limited between the buckle protrusion 1211 and the stop portion 122 to stabilize the installation position and the installation state of the coupling member 11, especially the height position of the coupling member 11 in the axial direction y of the mounting member 12.

[0056] By adopting the above scheme, the mounting member 12 can be buckled and matched with the mounting hole 111 through the buckling protrusion 1211 of the buckling portion 121, and the coupling member 11 can be axially limited between the buckling protrusion 1211 and the stop portion 122, so as to stabilize the mounting position and mounting state of the coupling member 11, especially the height position of the coupling member 11 in the axial direction y of the mounting member 12. Based on this, the mounting member 12 can support and fix the coupling member 11 in a simplified and optimized structure, and the controllability and stability of the height position of the coupling member 11 in the axial direction y of the mounting member 12 can be improved, so that the structure of the capacitive coupling assembly 10 can be optimized, and the assembly convenience, structural reliability, consistency and usability of the capacitive coupling assembly 10 can be improved.

[0057] Of course, in other embodiments, the outer periphery of the buckling portion 121 can be provided with two buckling protrusions 1211, the two buckling protrusions 1211 are spaced apart along the axial direction y of the mounting member 12, the buckling portion 121 is arranged through the mounting hole 111, and the two buckling protrusions 1211 are respectively buckled on the two side holes of the mounting hole 111, so as to axially limit the coupling member 11 between the two buckling protrusions 1211, and stabilize the mounting position and mounting state of the coupling member 11, especially the height position of the coupling member 11 in the axial direction y of the mounting member 12.

[0058] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the buckling portion 121 is provided with a truncated groove 1212, the extension direction x of the truncated groove 1212 is perpendicular to the axial direction y of the mounting member 12, the truncated groove 1212 is arranged through along its extension direction, the groove depth direction of the truncated groove 1212 is parallel to the axial direction y of the mounting member 12, and the truncated groove 1212 passes through the buckling protrusion 1211 along its groove depth direction.

[0059] It should be noted that the buckling portion 121 is provided with at least one truncated groove 1212. The extension direction x of the truncated groove 1212 is perpendicular to the axial direction y of the mounting member 12, for example, the extension direction x of the truncated groove 1212 can coincide with any radial direction of the buckling portion 121 (i.e. the extension direction x of the truncated groove 1212 can pass through the central axis L of the mounting member 12 and be perpendicular to the central axis L of the mounting member 12), for example, the extension direction x of the truncated groove 1212 can be parallel to but not coincide with any radial direction of the buckling portion 121 (i.e. the extension direction x of the truncated groove 1212 does not pass through the central axis L of the mounting member 12 but is perpendicular to the central axis L of the mounting member 12). The groove depth direction of the truncated groove 1212 is perpendicular to the extension direction x of the truncated groove 1212 and parallel to the axial direction y of the mounting member 12.

[0060] The cutting groove 1212 is provided through along the extension direction x of the cutting groove 1212, and the cutting groove 1212 passes through the buckle protrusion 1211 along the groove depth direction of the cutting groove 1212, so that the cutting groove 1212 can cut the complete continuity of the buckle portion 121, especially the buckle protrusion 1211 in the circumferential direction, can provide a deformation space for the buckle portion 121, especially the buckle protrusion 1211, can reduce the deformation resistance of the buckle portion 121, especially the buckle protrusion 1211, and can optimize the elastic deformation capability of the buckle portion 121, especially the buckle protrusion 1211. Based on this, in the assembly process of the buckle portion 121 penetrating the mounting hole 111, the buckle portion 121, especially the buckle protrusion 1211, can adaptively produce elastic contraction deformation, so as to facilitate the buckle portion 121 to quickly and smoothly penetrate the mounting hole 111, especially the buckle protrusion 1211 to quickly and smoothly penetrate from one side of the mounting hole 111 to the other side of the mounting hole 111; after the buckle protrusion 1211 penetrates the mounting hole 111, the buckle portion 121, especially the buckle protrusion 1211, can quickly and automatically restore the elastic deformation, so as to facilitate the buckle protrusion 1211 to be buckled to the hole edge of the mounting hole 111 away from the stop portion 122.

[0061] By adopting the above scheme, the complete continuity of the buckle portion 121, especially the buckle protrusion 1211 in the circumferential direction, can be cut through the cutting groove 1212, and a deformation space can be provided for the buckle portion 121, especially the buckle protrusion 1211, so as to reduce the deformation resistance of the buckle portion 121, especially the buckle protrusion 1211, and optimize the elastic deformation capability of the buckle portion 121, especially the buckle protrusion 1211. Based on this, in the assembly process of the buckle portion 121 penetrating the mounting hole 111, the buckle portion 121, especially the buckle protrusion 1211, can adaptively produce elastic contraction deformation when passing through the mounting hole 111, so that the buckle portion 121 can be quickly and smoothly penetrated into the mounting hole 111, and the buckle protrusion 1211 can be quickly and smoothly penetrated from one side of the mounting hole 111 to the other side of the mounting hole 111, thereby improving the assembly convenience and efficiency between the mounting piece 12 and the coupling piece 11. After the buckle protrusion 1211 penetrates the mounting hole 111, the buckle portion 121, especially the buckle protrusion 1211, can quickly and automatically restore the elastic deformation, so as to facilitate the buckle protrusion 1211 to be buckled to the hole edge of the mounting hole 111 away from the stop portion 122, and maintain and improve the assembly reliability and connection reliability between the mounting piece 12 and the coupling piece 11.

[0062] Please refer to Figure 2 、 Figure 3 、 Figure 4 In some embodiments of the present application, the cutting groove 1212 is provided on the end face of the buckle portion 121 close to the stop portion 122.

[0063] It should be noted that the cut-off groove 1212 is arranged on the end face of the buckle portion 121 close to the stop portion 122, that is, in the depth direction of the cut-off groove 1212, the opening of the cut-off groove 1212 is arranged on the end face of the buckle portion 121 close to the stop portion 122, and the bottom of the cut-off groove 1212 is closed.

[0064] By adopting the above scheme, by arranging the cut-off groove 1212 on the end face of the buckle portion 121 close to the stop portion 122, the opening of the cut-off groove 1212 is arranged on the end face of the buckle portion 121 close to the stop portion 122, and is not communicated to the end face of the buckle portion 121 away from the stop portion 122, so that the cut-off groove 1212 can form a limited notch in the axial direction of the buckle portion 121. Based on this, on the one hand, the cut-off groove 1212 can provide sufficient space for the deformation of the buckle portion 121, especially the buckle protrusion 1211, so that the buckle portion 121, especially the buckle protrusion 1211, can flexibly adapt to the elastic shrinkage deformation caused by the extrusion of the hole wall of the mounting hole 111, so that the buckle protrusion 1211 can smoothly pass through the mounting hole 111, and then quickly recover the original shape to be tightly buckled on the hole wall of the mounting hole 111, thereby improving the connection convenience, connection reliability between the mounting piece 12 and the coupling piece 11. On the other hand, since the cut-off groove 1212 is not communicated to the end face of the buckle portion 121 away from the stop portion 122, it is beneficial to maintain the structural strength of the region of the buckle portion 121 away from the stop portion 122, thereby improving the structural reliability, use reliability and service life of the mounting piece 12 and the capacitive coupling assembly 10.

[0065] Of course, in other embodiments, the cut-off groove 1212 can be arranged on the outer circumferential surface of the buckle portion 121; in the depth direction of the cut-off groove 1212, the opposite sides of the cut-off groove 1212 are closed, or the side of the cut-off groove 1212 away from the stop portion 122 is communicated to the outside of the buckle portion 121.

[0066] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, two cut-off grooves 1212 are arranged, and the two cut-off grooves 1212 are symmetrically distributed about the central axis L of the mounting piece 12.

[0067] It should be noted that, on the basis of the above embodiment, that is, on the basis of the cut-off groove 1212 being arranged on the end face of the buckle portion 121 close to the stop portion 122, two cut-off grooves 1212 are arranged, and the two cut-off grooves 1212 are arranged in parallel and spaced apart, and are arranged on opposite sides of the central axis L of the mounting piece 12, and are symmetrically distributed about the central axis L of the mounting piece 12.

[0068] By adopting the above scheme, the buckle portion 121 can be uniformly deformed when subjected to external force through the two symmetrically distributed truncated grooves 1212, thereby helping the buckle portion 121, especially the buckle protrusion 1211, to smoothly pass through the mounting hole 111, reducing assembly difficulties and damage caused by uneven deformation, and improving the connection convenience, connection efficiency and connection reliability between the mounting piece 12 and the coupling piece 11. Moreover, the buckle portion 121 can uniformly disperse stress when subjected to force through the two symmetrically distributed truncated grooves 1212, thereby improving the carrying capacity, use reliability and service life of the buckle portion 121.

[0069] Of course, in other embodiments, the number and position of the truncated grooves 1212 can be flexibly set, for example, the truncated grooves 1212 can be provided only one, and for example, the truncated grooves 1212 can be provided two but the two truncated grooves 1212 are asymmetrically distributed, and the like.

[0070] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the outer peripheral surface of the buckle portion 121 has a guide taper surface 1213 located on the side of the buckle protrusion 1211 away from the stop portion 122, and the radial dimension of the guide taper surface 1213 is tapered in the direction away from the buckle protrusion 1211.

[0071] It should be noted that at least part of the outer peripheral surface of the buckle portion 121 is the guide taper surface 1213. The guide taper surface 1213 is located on the side of the buckle protrusion 1211 away from the stop portion 122, based on which the guide taper surface 1213 will enter the mounting hole 111 before the buckle protrusion 1211 in the assembly process of the buckle portion 121 into the mounting hole 111; and since the radial dimension of the guide taper surface 1213 is tapered in the direction away from the buckle protrusion 1211, the end of the guide taper surface 1213 with smaller radial dimension will enter the mounting hole 111 before the end of the guide taper surface 1213 with larger radial dimension, thereby achieving the effect of gradually guiding the buckle portion 121 to enter the mounting hole 111.

[0072] By adopting the above scheme, in the assembly process of the buckle portion 121 into the mounting hole 111, the guide taper surface 1213 with the radial dimension tapered in the direction away from the buckle protrusion 1211 can be used as a guide surface to guide the end of the buckle portion 121 away from the stop portion 122 and the buckle protrusion 1211 to smoothly and smoothly pass through the mounting hole 111, thereby improving the assembly convenience and efficiency between the mounting piece 12 and the coupling piece 11.

[0073] Please refer to Figure 3 , Figure 2 , Figure 2In some embodiments of this application, the first plate 21 is provided with a connecting hole 2111 at the position corresponding to the mounting member 12, and the mounting member 12 has a connecting part 123 that is connected to the snap-fit ​​part 121, and the connecting part 123 is inserted into the connecting hole 2111.

[0074] It should be noted that the first plate 21 has a connecting hole 2111 at the position corresponding to the mounting part 12, and the connecting hole 2111 is a blind hole.

[0075] The mounting part 12 has a connecting part 123 at one end near the first plate 21, and the connecting part 123 is integrally connected to the snap-fit ​​part 121. Figure 2 As shown, in some embodiments, the snap-fit ​​portion 121, the stop portion 122, and the connecting portion 123 are integrally connected sequentially along the axial direction y of the mounting member 12. In other embodiments, the stop portion 122 may be provided on the side of the snap-fit ​​portion 121 away from the connecting portion 123.

[0076] The connecting part 123 is inserted into the connecting hole 2111. Based on the insertion fit between the connecting part 123 and the connecting hole 2111, the mounting member 12 can be directly planar-limited relative to the first plate 21, thereby achieving positioning and stabilizing the planar position of the mounting member 12 relative to the first plate 21 and the second plate 22. It can limit the planar movement of the mounting member 12 relative to the first plate 21 and the second plate 22, and optimize and stabilize the installation position and installation state of the mounting member 12 between the first plate 21 and the second plate 22. The insertion fit between the connecting part 123 and the connecting hole 2111 can be an interference fit, a transition fit, or a small clearance fit.

[0077] like Figure 2 As shown, in some embodiments, the first plate 21 has a protrusion 211 at the position corresponding to the mounting member 12, and the end face of the protrusion 211 has a connecting hole 2111. This arrangement facilitates raising the height of the mounting member 12 and the coupling member 11, and also improves the connection strength, reliability, and stability between the mounting member 12 and the first plate 21. In another embodiment, the first plate 21 has a flat plate structure, and the connecting hole 2111 can be formed on the surface of the first plate 21.

[0078] By adopting the above scheme, the mounting member 12 can be inserted and fitted into the connecting hole 2111 of the first plate member 21 through the connecting portion 123 to be limited in the plane relative to the first plate member 21. Based on this, the plane position of the mounting member 12 relative to the first plate member 21 and the second plate member 22 can be quickly and reliably positioned and stably installed. The plane movement of the mounting member 12 relative to the first plate member 21 and the second plate member 22 can be limited. The installation position and installation state of the mounting member 12 between the first plate member 21 and the second plate member 22 can be optimized. This is conducive to stabilizing the installation position and installation state of the mounting member 12 and the coupling member 11, especially the height position of the coupling member 11 between the first plate member 21 and the second plate member 22. The assembly reliability, assembly convenience, assembly precision and assembly efficiency of the capacitive coupling assembly 10 can be improved. The consistency and reliability of the capacitive coupling assembly 10 can be improved. The consistency, quality and yield of the filter using the capacitive coupling assembly 10 can be improved. The failure rate and debugging cost of the filter using the capacitive coupling assembly 10 can be reduced.

[0079] Of course, in other embodiments, the mounting member 12 can be interference fitted between the first plate member 21 and the second plate member 22 to promote the plane position of the mounting member 12 relative to the first plate member 21 and the second plate member 22 to be substantially stable by friction. The mounting member 12 can also be completely fixed by being bonded, welded, etc. with at least one of the first plate member 21 and the second plate member 22. And so on.

[0080] Please refer to Figure 2 In some embodiments of the present application, the connecting portion 123 abuts against the hole bottom of the connecting hole 2111.

[0081] It should be noted that, in the case where the connecting portion 123 is inserted into the connecting hole 2111, the connecting portion 123 can abut against the hole bottom of the connecting hole 2111 to accurately position the connecting portion 123 in the connecting hole 2111, that is, to limit the connecting portion 123 both circumferentially relative to the connecting hole 2111 and axially relative to the connecting hole 2111.

[0082] By adopting the above scheme, the mounting piece 12 can abut against the hole bottom of the connecting hole 2111 through the connecting portion 123, so as to facilitate the accurate positioning of the mounting piece 12 in the connecting hole 2111, facilitate the circumferential positioning of the mounting piece 12 relative to the connecting hole 2111, and also facilitate the axial positioning of the mounting piece 12 relative to the connecting hole 2111. Based on this, in the assembly process, the positioning and assembly between the mounting piece 12 and the connecting hole 2111 can be quickly and accurately completed through the positioning abutment between the connecting portion 123 and the hole bottom of the connecting hole 2111, so as to improve the assembly reliability, assembly convenience, assembly efficiency and assembly accuracy. Moreover, in the filter product, the mounting position and mounting state of the mounting piece 12 between the first plate piece 21 and the second plate piece 22 can be quickly, effectively and reliably stabilized, the risk of loosening of the mounting piece 12 can be reduced, so as to be beneficial to stabilize the mounting position and mounting state of the mounting piece 12 and the coupling piece 11, especially beneficial to stabilize the height position of the coupling piece 11 between the first plate piece 21 and the second plate piece 22, improve the consistency, structural reliability and use reliability of the capacitive coupling assembly 10, improve the quality and yield of the filter applying the capacitive coupling assembly 10, and reduce the failure rate and debugging cost of the filter applying the capacitive coupling assembly 10.

[0083] Of course, in other embodiments, the connecting portion 123 can be stopped at the hole opening of the connecting hole 2111 through the stop portion 122 connected between the buckle portion 121 and the connecting portion 123, or through part of the connecting portion 123, so as to facilitate the axial limiting of the connecting portion 123 relative to the connecting hole 2111.

[0084] Please refer to Figure 3 In some embodiments of the present application, the connecting portion 123 is in interference fit with the connecting hole 2111.

[0085] By adopting the above scheme, by making the connecting portion 123 in interference fit with the connecting hole 2111, the contact tightness and connection stability between the connecting portion 123 and the connecting hole 2111 can be improved, the risk of loosening and falling off of the connecting portion 123 in the connecting hole 2111 can be reduced, so as to improve the stability of the mounting position and mounting state of the mounting piece 12 between the first plate piece 21 and the second plate piece 22, improve the stability of the mounting position (especially the height position) and mounting state of the coupling piece 11 between the first plate piece 21 and the second plate piece 22, so as to improve the consistency, structural reliability and use reliability of the capacitive coupling assembly 10, and improve the quality and yield of the filter applying the capacitive coupling assembly 10. Moreover, based on the interference fit, a certain assembly tolerance can exist between the connecting portion 123 and the connecting hole 2111, so as to improve the assembly convenience, assembly efficiency and assembly yield between the mounting piece 12 and the filter housing 20.

[0086] Of course, in other embodiments, the connecting portion 123 and the connecting hole 2111 can be transitionally fitted or small-gap fitted.

[0087] Please refer to Figure 4 In some embodiments of the present application, the mounting member 12 is interference fitted between the first plate member 21 and the second plate member 22. That is, along the axial direction y of the mounting member 12, the size of the mounting member 12 is slightly larger than the spacing between the first plate member 21 and the second plate member 22, so that the mounting member 12 is interference fitted between the first plate member 21 and the second plate member 22. The specific interference amount can be set as needed considering the overall size of the filter, flatness, etc.

[0088] By adopting the above scheme, by interference fitting the mounting member 12 between the first plate member 21 and the second plate member 22, on the one hand, the size precision requirement of the "size of the mounting member 12 along its axial direction" and the "spacing between the first plate member 21 and the second plate member 22" can be reduced, the assembly precision requirement of the mounting member 12 between the first plate member 21 and the second plate member 22 can be reduced, and a certain assembly tolerance can be allowed, thereby improving the assembly convenience and assembly efficiency of the mounting member 12 and the capacitive coupling assembly 10. On the other hand, based on the interference abutting fit, a larger contact pressure and friction force can be generated between the mounting member 12 and the first plate member 21, and between the mounting member 12 and the second plate member 22, thereby improving the contact tightness and connection stability between the mounting member 12 and the first plate member 21, and between the mounting member 12 and the second plate member 22, reducing the risk of relative motion of the mounting member 12 relative to the first plate member 21 and the second plate member 22, improving the stability of the mounting position and the mounting state of the mounting member 12 between the first plate member 21 and the second plate member 22, reducing the risk of height position change of the coupling member 11 between the first plate member 21 and the second plate member 22 caused by loosening of the mounting member 12, improving the use reliability of the capacitive coupling assembly 10, and improving the quality and yield of the filter applying the capacitive coupling assembly 10.

[0089] Of course, in other embodiments, the mounting member 12 can be transitionally fitted between the first plate member 21 and the second plate member 22.

[0090] Please refer to Figure 2 , Figure 4 , Figure 2 In some embodiments of the present application, the mounting member 12 is provided with a protrusion 124 at least at one end along its axial direction.

[0091] It should be noted that the mounting member 12 can be provided with a protrusion 124 at one end along its axial direction, or the mounting member 12 can be provided with a protrusion 124 at both ends along its axial direction. The mounting member 12 mainly abuts with the first plate member 21 or the second plate member 22 of the filter housing 20 via the protrusion 124. For example, as shown in Figure 3 , Figure 4As shown, in some embodiments, the mounting member 12 is provided with a protrusion 124 at the end face thereof facing the first plate member 21 (i.e. the end face of the connecting portion 123 facing the hole bottom of the connecting hole 2111), and the mounting member 12 mainly abuts against the first plate member 21 (i.e. the hole bottom of the connecting hole 2111) via the protrusion 124. In other embodiments, the mounting member 12 is provided with a protrusion 124 at the end face thereof facing the second plate member 22, and the mounting member 12 mainly abuts against the second plate member 22 via the protrusion 124.

[0092] The shape of the protrusion 124 can be set as required, for example, the protrusion 124 can be circular, polygonal, irregular, etc. In the end face of the mounting member 12 provided with the protrusion 124, the projection area of the protrusion 124 is smaller than the projection area of the corresponding end face of the mounting member 12. On this basis, the specific size of the protrusion 124 can be set as required.

[0093] Since the mounting member 12 is made of insulating material and has self-lubricating property and slight elasticity, it can deform to a certain extent without being easily broken when subjected to pressure. Thus, by adopting the above scheme, by providing the protrusion 124 at least at one end of the mounting member 12 along the axial direction thereof, the mounting member 12 can be facilitated to abut against the first plate member 21 or the second plate member 22 of the filter housing 20 via the smaller area of the protrusion 124. Based on this, the contact area between the mounting member 12 and the first plate member 21 or the second plate member 22 of the filter housing 20 can be reduced via the protrusion 124, and the pressure intensity on the unit contact area between the mounting member 12 and the first plate member 21 (or the second plate member 22) can be increased via the protrusion 124. Thus, in the assembly process, if there is a large interference amount between the mounting member 12, the first plate member 21 and the second plate member 22, the mounting member 12 can more easily produce slight compression deformation along the axial direction y thereof due to the larger and more concentrated abutting pressure, so that the mounting member 12 can have a certain assembly tolerance between the first plate member 21 and the second plate member 22, the assembly precision requirement of the mounting member 12 between the first plate member 21 and the second plate member 22 can be reduced, the assembly convenience and efficiency of the mounting member 12 between the first plate member 21 and the second plate member 22 can be improved, and the risk of the mounting member 12 lifting the second plate member 22 (or the first plate member 21) due to a large interference amount can be reduced, the assembly convenience, efficiency, yield and quality of the filter using the capacitive coupling assembly 10 can be improved. Therefore, the present embodiment is particularly suitable for being combined with the "mounting member 12 is interference-fitted between the first plate member 21 and the second plate member 22" embodiment.

[0094] Please refer to Figure 1 , Figure 2 , ​ In some embodiments of the present application, the mounting member 12 is an integrally formed structure.

[0095] By adopting the above scheme, by making the mounting piece 12 an integral structure, the assembly process between each part of the buckle part 121 of the mounting piece 12 and the like can be omitted, the processing convenience, processing efficiency and processing precision of the mounting piece 12 itself can be improved, and the structural strength, structural reliability, use reliability and service life of the mounting piece 12 can be improved. Compared with the mounting structure composed of multiple components of the existing capacitive coupling assembly, the capacitive coupling assembly 10 of the embodiment can significantly reduce the number of components, effectively shorten the tolerance chain and reduce the cumulative tolerance, effectively simplify and optimize the assembly process, and improve the assembly reliability, assembly convenience and assembly efficiency.

[0096] Please refer to ​ , ​ Some embodiments of the present application provide a filter, including a filter housing 20, and the capacitive coupling assembly 10 provided by the embodiments of the present application.

[0097] It should be noted that the filter includes a filter housing 20. The inside of the filter housing 20 has a closed inner cavity, which can realize a shielding function to prevent signal leakage. One side of the filter housing 20 is a first plate 21, and the plate on the side of the filter housing 20 opposite the first plate 21 is a second plate 22. In actual application scenarios, the filter can be placed with the second plate 22 facing up, or placed with the second plate 22 facing left, right, front or back. In addition, the shape, size, material and the like of the filter housing 20 can be flexibly set as needed.

[0098] The filter further includes a plurality of resonant rods 30 arranged in the filter housing 20. The plurality of resonant rods 30 are arranged as needed and construct the required coupling relationship. One end of the resonant rod 30 is connected and fixed to the wall of the filter housing 20 (for example, the first plate 21 or the second plate 22, etc.), and the resonant rod 30 can be connected and fixed to the filter housing 20 in a manner such as but not limited to integral connection, welding, screw fastening, threaded connection, riveting, pressure connection, clamping, etc. The resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod of other materials; the resonant rod 30 can be a hollow resonant rod or a solid resonant rod; the resonant rod 30 can have a resonant disc or not; the resonant disc can have a flange or not; the resonant rod 30 can be a circular rod, a polygonal rod, a special-shaped rod, a sheet-shaped resonant rod, a sheet metal resonant rod, or other forms of resonant rods, etc.

[0099] The filter further includes a capacitive coupling assembly 10, which can be the capacitive coupling assembly 10 of any of the embodiments of the present application. The capacitive coupling assembly 10 can be arranged between any two resonant rods 30 to enable capacitive coupling between the two resonant rods 30.

[0100] By using the above scheme, the filter can construct the capacitive coupling relationship by applying the capacitive coupling assembly 10 provided by the embodiment of the application, improve the consistency, quality and yield of the filter, and reduce the failure rate and debugging cost of the filter.

[0101] The above is only optional embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A capacitive coupling assembly disposed within a filter housing, the filter housing having opposing first and second plates, characterized in that, The capacitive coupling assembly comprises: The coupling member has a mounting hole; The mounting member is an insulating member, and opposite sides of the mounting member along an axial direction thereof abut against the first plate member and the second plate member respectively, the mounting member is limited in plane relative to at least one of the first plate member and the second plate member, the mounting member has a buckle portion, the buckle portion is arranged through the mounting hole and is in axial limiting buckling fit with the mounting hole.

2. The capacitive coupling assembly of claim 1, wherein, The outer periphery of the buckle portion is provided with a buckle protrusion, the buckle protrusion is buckled to one side hole of the mounting hole, the mounting member has a stop portion, the stop portion is sequentially connected with the buckle portion along the axial direction of the mounting member, and the stop portion is stopped at the other side hole of the mounting hole.

3. The capacitive coupling assembly of claim 2, wherein, The buckle portion is provided with a cut-off groove, an extension direction of the cut-off groove is perpendicular to the axial direction of the mounting member, the cut-off groove is arranged through along the extension direction thereof, a groove depth direction of the cut-off groove is parallel to the axial direction of the mounting member, and the cut-off groove passes through the buckle protrusion along the groove depth direction thereof.

4. The capacitive coupling assembly of claim 3, wherein, The cut-off groove is arranged on an end face of the buckle portion close to the stop portion.

5. The capacitive coupling assembly of claim 3, wherein, The cut-off groove is provided with two cut-off grooves, and the two cut-off grooves are symmetrically distributed about a central axis of the mounting member.

6. The capacitive coupling assembly of claim 2, wherein, The outer peripheral surface of the buckle portion has a guide conical surface, the guide conical surface is located on a side of the buckle protrusion away from the stop portion, and a radial dimension of the guide conical surface is gradually reduced in a direction away from the buckle protrusion.

7. The capacitive coupling assembly of any one of claims 1-6, wherein, The first plate member is provided with a connecting hole at a position corresponding to the mounting member, the mounting member has a connecting portion connected with the buckle portion, and the connecting portion is inserted into the connecting hole.

8. The capacitive coupling assembly of claim 7, wherein, The connecting portion abuts against a hole bottom of the connecting hole.

9. The capacitive coupling assembly of claim 7, wherein, The connecting portion is in interference fit with the connecting hole.

10. The capacitive coupling assembly of any one of claims 1-6, wherein, The mounting member is in interference fit between the first plate member and the second plate member.

11. The capacitive coupling assembly of any one of claims 1-6, wherein, At least one end of the mounting member along the axial direction thereof is provided with a protruding block.

12. The capacitive coupling assembly of any one of claims 1-6, wherein, The mounting member is an integrally formed structure.

13. A filter, characterized by The capacitive coupling assembly comprises a filter housing and any one of claims 1-12.

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