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 fixing structure. The coupling piece is provided with a through fixing hole. The fixing structure abuts against the first plate and the second plate respectively along the two opposite sides of the axial direction of the fixing structure, is limited relative to at least one of the plane of the first plate and the plane of the second plate, and comprises a first insulating part and a second insulating part which are arranged on the two opposite sides of the fixing hole respectively. The side, facing the second insulating part, of the first insulating part is provided with a first connecting part, the side, facing the first insulating part, of the second insulating part is provided with a first connecting hole, the first connecting part penetrates through the fixing hole and is inserted into the first connecting hole, and the coupling part is clamped between the first insulating part and the second insulating part jointly. According to the capacitive coupling assembly, the number of parts can be reduced, the assembling convenience and the assembling efficiency can be improved, the tolerance chain and the accumulated tolerance can be reduced, and the height position of the coupling piece between the first plate and the second plate can be conveniently and accurately controlled.

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 fixing 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 penetrates a fixing hole, the fixing structure includes a first insulating block, a second insulating block and a screw, the first insulating block and the second insulating block are arranged on two sides of the fixing hole, a part of the first insulating block penetrates the fixing hole, the fixing structure is provided with a penetrating hole, the penetrating hole penetrates the first insulating block and the second insulating block along the penetration direction of the fixing hole, and the screw is arranged in the penetrating hole and is threadedly connected with the filter housing. Based on this, the screw can press and fix the first insulating block, the coupling sheet and the second insulating block to the filter housing, and the coupling sheet can be arranged to be insulated from the screw and the filter housing through the first insulating block, so that the coupling sheet can be arranged to be not grounded, and the two resonant rods can be enabled to be capacitive coupled.

[0003] However, the capacitive coupling assembly has a large number of parts, is complicated to assemble, has a long tolerance chain, and has a large cumulative tolerance, which makes it difficult to accurately control the height position of the coupling sheet, thereby resulting in poor consistency and quality of the filter product, and high failure rate and debugging cost of the filter product. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a capacitive coupling assembly, aiming to solve the problem of a large number of parts, complicated assembly and a long tolerance chain of the existing capacitive coupling assembly, which results in a large cumulative tolerance and makes it difficult to accurately control the height position of the coupling sheet.

[0005] To achieve the above object, the technical scheme adopted by the embodiments of the present application is 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, the coupling member penetrates a fixing hole;

[0008] A fixing structure abutting against the first plate member and the second plate member on opposite sides thereof along an axial direction thereof, the fixing structure being limited in a plane relative to at least one of the first plate member and the second plate member, the fixing structure comprising a first insulating member and a second insulating member disposed on opposite sides of the fixing hole, the first insulating member being provided with a first connecting portion on a side thereof facing the second insulating member, the second insulating member being provided with a first connecting hole on a side thereof facing the first insulating member, the first connecting portion being disposed in the fixing hole and inserted into the first connecting hole, the first insulating member and the second insulating member together clamping the coupling member therebetween.

[0009] In some embodiments, the first insulating member is made of the same material as the second insulating member.

[0010] In some embodiments, the fixing structure is interference-fitted between the first plate member and the second plate member.

[0011] In some embodiments, the first connecting hole is a through hole and extends through to a side of the second insulating member facing away from the first insulating member.

[0012] In some embodiments, the first connecting hole is a blind hole, and a first protrusion is provided on a side of the second insulating member facing away from the first insulating member.

[0013] In some embodiments, a second protrusion is provided on a side of the first insulating member facing away from the second insulating member.

[0014] In some embodiments, the first insulating member comprises a second connecting portion connected to the first connecting portion on a side thereof facing away from the second insulating member, the filter housing is provided with a second connecting hole at a position corresponding to the second connecting portion, and the second connecting portion is inserted into the second connecting hole.

[0015] In some embodiments, the first insulating member further comprises a stop portion disposed between the first connecting portion and the second connecting portion, the stop portion at least partially protruding in a circumferential direction from the first connecting portion and the second connecting portion, and the stop portion stopping at an opening of the fixing hole and an opening of the second connecting hole.

[0016] In some embodiments, the second connecting portion abuts against a bottom of the second connecting hole and is partially exposed outside an opening of the second connecting hole, the second connecting portion at least partially protruding in a circumferential direction from the first connecting portion and stopping at an opening of the fixing hole.

[0017] In some embodiments, the second connecting portion is interference-fitted with the second connecting hole.

[0018] In some embodiments, the first connecting portion is in clearance fit or transition fit with the fixing hole.

[0019] In some embodiments, two fixing structures are provided, and the two fixing structures are arranged at opposite ends of the coupling member.

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

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

[0022] The capacitive coupling assembly provided in the embodiments of the present application can support and fix the coupling member without grounding by the fixing structure, and can realize capacitive coupling of the two resonant rods by the coupling member. The fixing structure can pass the first connecting portion of the first insulating member through the fixing hole of the coupling member and insert the first connecting hole of the second insulating member, so that the first insulating member and the second insulating member can be connected to each other and can jointly clamp and tighten the coupling member therebetween. The fixing structure can also abut against the first plate member and the second plate member on opposite sides thereof, and can be limited in plane relative to at least one of the first plate member and the second plate member, so as to realize stable installation position and installation state of the fixing structure between the first plate member and the second plate member. Therefore, the fixing structure can only support and fix the coupling member without grounding by the two components with insulation performance, i.e. the first insulating member and the second insulating member, and at least one component, i.e. a screw, of the fixing structure of the existing capacitive coupling assembly can be omitted. Thus, the capacitive coupling assembly of the present embodiment can simplify and optimize the structure, reduce the number of components, simplify and optimize the assembly process, improve the assembly convenience and efficiency, shorten the tolerance chain, reduce the cumulative tolerance, improve the controllability of the height position of the coupling member between the first plate member and the second plate member, facilitate accurate control of the height position of the coupling member between the first plate member and the second plate member, thereby improving the consistency and usability of the capacitive coupling assembly, improving the consistency, quality and yield of the filter using the capacitive coupling assembly, and reducing the failure rate and debugging cost of the filter using the capacitive coupling assembly. 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 are 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 perspective view of the filter provided in some embodiments of the present application is shown in the following figure.

[0025] Figure 2 A cross-sectional view of the filter provided for some embodiments of the present application, wherein the first insulating member comprises a stop portion, and the first connecting hole penetrates to a side of the second insulating member facing the second plate member;

[0026] Figure 3 A cross-sectional view of the filter provided for some embodiments of the present application, wherein the first connecting hole is a blind hole, and the second connecting portion stops at the aperture of the fixing hole and abuts against the hole bottom of the second connecting hole; Figure 2 An exploded schematic view of the capacitive coupling assembly provided for some embodiments of the present application;

[0027] Figure 4 A cross-sectional view of the filter provided for some embodiments of the present application, wherein the first connecting hole is a blind hole, and the second connecting portion stops at the aperture of the fixing hole and abuts against the hole bottom of the second connecting hole;

[0028] Figure 5 An exploded schematic view of the capacitive coupling assembly provided for some embodiments of the present application; Figure 4 An exploded schematic view of the capacitive coupling assembly provided for some embodiments of the present application; Figure 1 ;

[0029] Figure 6 An exploded schematic view of the capacitive coupling assembly provided for some embodiments of the present application; Figure 4 An exploded schematic view of the capacitive coupling assembly provided for some embodiments of the present application; Figure 2 .

[0030] In the drawings:

[0031] 10 - capacitive coupling assembly, 11 - coupling member, 111 - fixing hole; 12 - fixing structure, 121 - first insulating member, 1211 - first connecting portion, 1212 - second connecting portion, 12121 - second protrusion, 1213 - stop portion, 122 - second insulating member, 1221 - first connecting hole, 1222 - first protrusion; 20 - filter housing, 21 - first plate member, 211 - boss, 2111 - second connecting hole, 22 - second plate member; 30 - resonant rod, 30a - first resonant rod, 30b - second resonant rod, 30c - third resonant rod, y - first direction. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in conjunction 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.

[0033] ​In the description of the present application, it needs to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings 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 therefore cannot be understood as indicating or implying 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.

[0034] 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 explicitly specified and limited.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through 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.

[0036] In some cases, the filter includes a filter housing, a plurality of resonant rods arranged in the filter housing, and a capacitive coupling component arranged between two resonant rods. The capacitive coupling component includes a coupling sheet and a fixing structure, the coupling sheet extends from one resonant rod to another resonant rod and realizes capacitive coupling of the two resonant rods, the coupling sheet penetrates a fixing hole, the fixing structure includes a first insulating block, a second insulating block and a screw, the first insulating block and the second insulating block are arranged on both sides of the fixing hole, part of the first insulating block penetrates the fixing hole, the fixing structure is provided with a penetrating hole, the penetrating hole penetrates the first insulating block and the second insulating block along the penetration direction of the fixing hole, and the screw is arranged in the penetrating hole and is screwed with the filter housing. Based on this, the screw can press and fix the first insulating block, the coupling sheet and the second insulating block to the filter housing, and the coupling sheet can be arranged to be insulated from the screw and the filter housing through the first insulating block, so that the coupling sheet can be arranged without grounding, and the two resonant rods can realize capacitive coupling.

[0037] However, the capacitive coupling assembly has a large number of components, and the assembly is complicated. The tolerance chain (i.e., the cumulative tolerance chain of the machining errors and assembly errors of the first insulating block, the second insulating block, the coupling sheet, the screw, and the cavity) is long, resulting in a large cumulative tolerance, so that the height position of the coupling sheet is difficult to accurately control, thereby causing poor consistency and quality of the filter product, and high failure rate and debugging cost of the filter product.

[0038] The embodiments provided in the present application will solve the above problems.

[0039] 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.

[0040] Please refer to Figure 1 , Figure 2 , Figure 3 Some embodiments of the present application provide a capacitive coupling assembly 10 arranged in a filter housing 20. The filter housing 20 has opposite first and second plate members 21 and 22. The capacitive coupling assembly 10 includes a coupling member 11 and a fixing structure 12. The coupling member 11 has a fixing hole 111 therethrough. The fixing structure 12 abuts the first and second plate members 21 and 22 along opposite sides thereof in the axial direction. The fixing structure 12 is limited in plane relative to at least one of the first and second plate members 21 and 22. The fixing structure 12 includes first and second insulating members 121 and 122 arranged on opposite sides of the fixing hole 111. The first insulating member 121 has a first connecting portion 1211 on the side facing the second insulating member 122. The second insulating member 122 has a first connecting hole 1221 on the side facing the first insulating member 121. The first connecting portion 1211 is arranged in the fixing hole 111 and inserted into the first connecting hole 1221. The first and second insulating members 121 and 122 clamp the coupling member 11 therebetween.

[0041] It should be noted that the capacitive coupling assembly 10 can be applied to a filter product. The filter includes a filter housing 20. The filter housing 20 has a closed inner cavity inside, which can achieve a shielding function to prevent signal leakage. One side of the filter housing 20 is a first plate member 21, and the opposite side of the filter housing 20 is a second plate member 22. The first and second plate members 21 and 22 are arranged in a first direction y. In actual application scenarios, the filter can be placed with the second plate member 22 facing up, or placed with the second plate member 22 facing left, right, front, or back. In addition, the shape, size, material, etc. of the filter housing 20 can be flexibly set as needed.

[0042] It should be further noted that 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 required and constructed to have a required coupling relationship. One end of the resonant rod 30 is connected and fixed to the wall portion (for example, 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 by means of, 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 made of other materials. The resonant rod 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.

[0043] The capacitive coupling assembly 10 can be arranged between any two resonant rods 30 to enable capacitive coupling between the two resonant rods 30.

[0044] In the case where the number of resonant rods 30 is at least three, the capacitive coupling assembly 10 can be arranged between two non-adjacent resonant rods 30 to enable capacitive cross-coupling between 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 between the two resonant rods 30 via the capacitive coupling assembly 10 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 a specific example of the filter, three resonant rods 30 are arranged in the filter housing 20, the three resonant rods 30 are a first resonant rod 30a, a second resonant rod 30b, and a third resonant rod 30c, and the coupling path of the first resonant rod 30a, the second resonant rod 30b, and the third resonant rod 30c is the main signal transmission path. The first resonant rod 30a and the third resonant rod 30c are non-adjacent in the main signal transmission path, and the capacitive coupling assembly 10 can be arranged between the non-adjacent first resonant rod 30a and the third resonant rod 30c to enable capacitive cross-coupling between the first resonant rod 30a and the third resonant rod 30c.

[0045] Of course, the capacitive coupling assembly 10 can also be arranged between two adjacent resonant rods 30 to enable capacitive coupling between the two resonant rods 30. The two adjacent resonant rods 30 are adjacent in the main signal transmission path, that is, the coupling between the two resonant rods 30 via the capacitive coupling assembly 10 is the coupling relationship in the main signal transmission path, that is, the coupling relationship between the two resonant rods 30 is cascading.

[0046] It is also to be noted that the coupling member 11 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 of the coupling member 11 is not grounded, that is, one end of the coupling member 11 in the extension direction of the coupling member 11 is not grounded, and the other end is grounded, or both ends of the coupling member 11 in the extension direction of the coupling member 11 are not grounded. Among them, 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 each other (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, so that the two resonant rods 30 are capacitively coupled through the coupling member 11. Among them, the coupling member 11 can be, but is not limited to, a sheet, a rod, and the like.

[0047] The fixing structure 12 can be provided at least one, and the at least one fixing structure 12 is arranged at the end of the coupling member 11 to support and fix the end of the coupling member 11 and make the end of the coupling member 11 not grounded; on this basis, part of the fixing structure 12 is arranged in the non-end region (for example, the 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 a fixing hole 111 corresponding to the fixing structure 12, the fixing hole 111 is a through hole and is arranged through the coupling member 11, and the through direction of the fixing hole 111 substantially corresponds to the first direction y. The fixing hole 111 can be circular, rectangular, etc. as needed, and the size of the fixing hole 111 can be set as needed.

[0048] The fixing structure 12 only includes two components of the first insulating member 121 and the second insulating member 122. The first insulating member 121 and the second insulating member 122 are both insulating members made of insulating materials, and the insulating materials used by the first insulating member 121 and the second insulating member 122 can be the same or different. The first insulating member 121 and the second insulating member 122 are arranged on opposite sides of the fixing hole 111. The side of the first insulating member 121 facing the second insulating member 122 protrudes a first connecting portion 1211, the first connecting portion 1211 is arranged through the fixing hole 111 and partially protrudes from the fixing hole 111 to the hole opening near the second insulating member 122. Correspondingly, the side of the second insulating member 122 facing the first insulating member 121 is provided with a first connecting hole 1221, which can be a through hole or a blind hole. The part of the first connecting portion 1211 protruding from the fixing hole 111 can be inserted into the first connecting hole 1221, so that the first insulating member 121 and the second insulating member 122 are connected to each other, and the first insulating member 121 and the second insulating member 122 together clamp and clamp the coupling member 11 therebetween. Among them, the cooperation between the first connecting portion 1211 and the fixing hole 111 can be a small gap fit or a transition fit or a small interference fit. Among them, the plug-in fit between the first connecting portion 1211 and the first connecting hole 1221 can be an interference fit, a transition fit or a small gap fit.

[0049] The axial direction of the fixing structure 12, i.e. the extension direction of the central axis of the fixing structure 12, in the filter product, substantially corresponds to the first direction y. The opposite sides of the fixing structure 12 along its axial direction, i.e. the side of the first insulating member 121 away from the second insulating member 122 (e.g. can be the end surface or end of the first insulating member 121 away from the second insulating member 122, and e.g. can be any side surface of the first insulating member 121 away from the second insulating member 122 along the first direction y), and the side of the second insulating member 122 away from the first insulating member 121 (e.g. can be the end surface or end of the second insulating member 122 away from the first insulating member 121, and e.g. can be any side surface of the second insulating member 122 away from the first insulating member 121 along the first direction y).

[0050] The opposite sides of the fixing structure 12 along its axial direction abut against the first plate member 21 and the second plate member 22 respectively, wherein the fixing structure 12 can be interference fitted or transition fitted between the first plate member 21 and the second plate member 22. Exemplarily, as shown in Figure 2 some embodiments, the side of the first insulating member 121 away from the second insulating member 122 abuts against the first plate member 21, and the side of the second insulating member 122 away from the first insulating member 121 abuts against the second plate member 22. In other embodiments, the side of the first insulating member 121 away from the second insulating member 122 abuts against the second plate member 22, and the side of the second insulating member 122 away from the first insulating member 121 abuts against the first plate member 21. Based on this, since the opposite sides of the fixing structure 12 abut against the first plate member 21 and the second plate member 22 respectively, the fixing structure 12 can be limitingly installed between the first plate member 21 and the second plate member 22 and be limited to move along the first direction y, so as to preliminarily stabilize the installation position and installation state of the fixing structure 12 between the first plate member 21 and the second plate member 22.

[0051] The fixing structure 12 is planarly limited relative to at least one of the first plate 21 and the second plate 22. That is, the fixing structure 12 can be planarly limited relative to the first plate 21, the fixing structure 12 can be planarly limited relative to the second plate 22, or the fixing structure 12 can be planarly limited relative to both the first plate 21 and the second plate 22 to achieve positioning and stabilizing the planar position of the fixing structure 12 relative to the first plate 21 and the second plate 22, and to limit the planar movement of the fixing structure 12 relative to the first plate 21 and the second plate 22, so as to optimize the installation position and installation state of the fixing structure 12 between the first plate 21 and the second plate 22. The fixing structure 12 can be fitted between the first plate 21 and the second plate 22 via interference, so as to promote the planar position of the fixing structure 12 relative to the first plate 21 and the second plate 22 to be substantially stable by means of friction; the fixing structure 12 can also be completely fixed by being bonded or fused to at least one of the first plate 21 and the second plate 22; the fixing structure 12 can also be relatively limited by being inserted into a hole of at least one of the first plate 21 and the second plate 22; and the like.

[0052] Since the installation position and installation state of the fixing structure 12 between the first plate 21 and the second plate 22 are stable and firm, and since the fixing structure 12 is coupled to the coupling member 11 by being clamped and clamped by the first insulating member 121 and the second insulating member 122, the installation position and installation state of the coupling member 11 can be stabilized, and in particular, the height position of the coupling member 11 between the first plate 21 and the second plate 22 can be stabilized. In this way, the height position of the coupling member 11 between the first plate 21 and the second plate 22 can be precisely controlled by adjusting the length of the first insulating member 121 along the first direction y, the length of the second insulating member 122 along the first direction y, the fitting position of the first connecting portion 1211 and the first connecting hole 1221 along the first direction y, and the like.

[0053] In summary, the capacitive coupling assembly 10 provided by the embodiment of the present application can support and fix the coupling member 11 through the fixing structure 12 and make the coupling member 11 not grounded, and can realize the capacitive coupling of the two resonance rods 30 through the coupling member 11. The fixing structure 12 can pass the first connecting part 1211 of the first insulating member 121 through the fixing hole 111 of the coupling member 11 and be inserted into the first connecting hole 1221 of the second insulating member 122, so that the first insulating member 121 and the second insulating member 122 can be connected to each other and can jointly clamp and hold the coupling member 11 therebetween. The fixing structure 12 can also abut against the first plate member 21 and the second plate member 22 on the opposite sides thereof respectively, and be limited in the plane relative to at least one of the first plate member 21 and the second plate member 22, so as to realize the installation position and installation state of the stable fixing structure 12 between the first plate member 21 and the second plate member 22. Based on this, the fixing structure 12 can only support and fix the coupling member 11 and make the coupling member 11 not grounded through the two components with insulation performance, i.e., the first insulating member 121 and the second insulating member 122, and at least one component of the fixing structure 12 of the existing capacitive coupling assembly 10 can be omitted, i.e., a screw. Thus, the capacitive coupling assembly 10 of the embodiment can simplify and optimize the structure, reduce the number of components, simplify and optimize the assembly process, improve the assembly convenience and efficiency, shorten the tolerance chain (at least the machining error and assembly error of the screw can be reduced), reduce the cumulative tolerance, improve the controllability of the height position of the coupling member 11 between the first plate member 21 and the second plate member 22, facilitate the accurate control of the height position of the coupling member 11 between the first plate member 21 and the second plate member 22, thereby improving the consistency and usability of the capacitive coupling assembly 10, improving the consistency, quality and yield of the filter using the capacitive coupling assembly 10, and reducing the failure rate and debugging cost of the filter using the capacitive coupling assembly 10.

[0054] Moreover, in the existing capacitive coupling assembly, the first insulating block needs to be arranged in the fixing hole, and the screw needs to be arranged in the through hole of the first insulating block, which causes the coupling sheet to have a larger fixing hole to accommodate the first insulating block and the screw, and the size of the coupling sheet needs to be expanded, thereby reducing the strength of the coupling sheet, causing the outer periphery of the coupling sheet to be too close to the filter shell and having a higher risk of sparking, and causing the coupling sheet to occupy a larger space and compress the design space of the filter. Alternatively, the existing capacitive coupling assembly may also choose to use a small size screw to maintain the safety distance between the outer periphery of the coupling sheet and the filter shell, and the strength of the coupling sheet, but in this way, the bearing capacity of the screw is weak and easy to damage, resulting in a higher failure rate of the existing capacitive coupling assembly, and the special size screw also increases the cost. In view of this, the capacitive coupling assembly 10 of the present embodiment only needs to arrange the first connecting part 1211 in the fixing hole 111 of the coupling part 11, and therefore, the coupling part 11 does not need to have a larger fixing hole 111, and the size of the coupling part 11 does not need to be larger, thereby maintaining and improving the strength of the coupling part 11, facilitating the coupling part 11 to have a certain safety distance with the filter shell 20 to reduce the risk of sparking, compressing the occupied space of the coupling part 11 to leave more design space for the filter, optimizing the structure, quality and yield of the capacitive coupling assembly 10, and reducing the cost of the capacitive coupling assembly 10.

[0055] In addition, in the existing capacitive coupling assembly, the first insulating block and the second insulating block are indirectly connected by the screw, but the thermal expansion coefficients and the thermal expansion degrees of the first insulating block (made of insulating material), the second insulating block (made of insulating material) and the screw (made of metal material) are not the same, which causes the existing capacitive coupling assembly to loosen and produce abnormal noise after experiencing high and low temperatures, and causes the height position of the coupling sheet to loosen and change, thereby reducing the quality of the filter product and increasing the failure rate. To solve this problem, please refer to Figure 2 、 Figure 3 In some embodiments of the present application, the material of the first insulating part 121 is the same as the material of the second insulating part 122. That is, the first insulating part 121 and the second insulating part 122 are both insulating parts made of insulating material, and the insulating material used by the first insulating part 121 and the second insulating part 122 is the same. For example, the insulating material used by the first insulating part 121 and the second insulating part 122 can be PTFE (Polytetrafluoroethylene) or the like.

[0056] By adopting the above-described scheme, and by making the material of the first insulating member 121 the same as that of the second insulating member 122, the coefficients and degrees of thermal expansion of the first insulating member 121 and the second insulating member 122 can be made consistent. Based on this, since the first insulating member 121 and the second insulating member 122 can deform synchronously, and since there is a direct insertion relationship between the first insulating member 121 and the second insulating member 122, the capacitive coupling assembly 10 of this embodiment experiences minimal or even negligible loosening after exposure to high and low temperatures. This reduces abnormal noise, maintains the stability of the height position of the coupling member 11 between the first plate 21 and the second plate 22, and reduces the risk of loosening or change in the height position of the coupling member 11 between the first plate 21 and the second plate 22. This improves the quality and yield of filters using this capacitive coupling assembly 10, and reduces the defect rate and debugging costs of filters using this capacitive coupling assembly 10.

[0057] Of course, in other embodiments, the insulating materials used for the first insulating member 121 and the second insulating member 122 may be different.

[0058] Please see Figure 2 , Figure 3 In some embodiments of this application, the fixing structure 12 is interference-fitted between the first plate 21 and the second plate 22. That is, the dimension of the fixing structure 12 along the first direction y is slightly larger than the distance between the first plate 21 and the second plate 22, so that there is an interference fit between the fixing structure 12 and the first plate 21 and the second plate 22. The specific interference fit can be set as needed, taking into account the overall size of the filter, flatness, etc.

[0059] By adopting the above scheme, by means of the interference fit of the fixing structure 12 between the first plate member 21 and the second plate member 22, on the one hand, the dimensional precision requirement of the “dimension of the fixing structure 12 along the first direction y” and the “distance between the first plate member 21 and the second plate member 22” can be reduced, the assembly precision requirement of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be reduced, and a certain assembly tolerance can be allowed, so that the assembly convenience and assembly efficiency of the fixing structure 12 and the capacitive coupling assembly 10 can be improved. On the other hand, based on the interference abutting fit, a larger contact pressure and friction force can be generated between the fixing structure 12 and the first plate member 21, and between the fixing structure 12 and the second plate member 22, so that the contact tightness and connection stability between the fixing structure 12 and the first plate member 21, and between the fixing structure 12 and the second plate member 22 can be improved, the risk of relative movement of the fixing structure 12 relative to the first plate member 21 and the second plate member 22 can be reduced, the stability of the mounting position and mounting state of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be improved, the risk of loosening of the fixing structure 12 leading to the change of the height position of the coupling member 11 between the first plate member 21 and the second plate member 22 can be reduced, the use reliability of the capacitive coupling assembly 10 can be improved, and the quality and yield of the filter applying the capacitive coupling assembly 10 can be improved.

[0060] Of course, in other embodiments, the fixing structure 12 can be transitionally fitted between the first plate member 21 and the second plate member 22.

[0061] Please refer to Figure 2 , Figure 3 In some embodiments of the present application, the first connecting hole 1221 is a through hole and penetrates to the side of the second insulating member 122 away from the first insulating member 121. That is, the first connecting hole 1221 penetrates from the side of the second insulating member 122 facing the first insulating member 121 to the side of the second insulating member 122 away from the first insulating member 121.

[0062] Since the second insulating member 122 is made of insulating material, has self-lubricating property and slight elasticity, and can be deformed to a certain extent without being easily broken when subjected to pressure. Thus, by adopting the above scheme, by making the first connecting hole 1221 pass through the side of the second insulating member 122 facing the first insulating member 121 to the side of the second insulating member 122 facing away from the first insulating member 121, the area of the side of the second insulating member 122 facing away from the first insulating member 121 can be reduced, the contact area between the second insulating member 122 and the second plate member 22 (or the first plate member 21) can be reduced, the pressure on the unit contact area between the second insulating member 122 and the second plate member 22 (or the first plate member 21) can be increased, and based on this, if there is a large interference between the fixing structure 12, the first plate member 21 and the second plate member 22 during assembly, the second insulating member 122 can be more easily compressed and deformed slightly in the first direction y due to the larger pressing pressure, so that the fixing structure 12 has a certain assembly tolerance between the first plate member 21 and the second plate member 22, the assembly precision requirement of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be reduced, the assembly convenience and efficiency of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be improved, and the risk of the second insulating member 122 lifting the second plate member 22 (or the first plate member 21) due to a large interference 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 especially suitable for being combined with the "the fixing structure 12 is interference-fitted between the first plate member 21 and the second plate member 22" embodiment.

[0063] Please refer to Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the first connecting hole 1221 is a blind hole, and the side of the second insulating member 122 facing away from the first insulating member 121 is provided with a first protrusion 1222.

[0064] It should be noted that the side of the second insulating member 122 facing away from the first insulating member 121 is provided with the first protrusion 1222. The shape of the first protrusion 1222 can be set as needed, for example, it can be circular, polygonal, irregular, etc. The "projected area of the first protrusion 1222 on the side of the second insulating member 122 facing away from the first insulating member 121" is smaller than the "area of the side of the second insulating member 122 facing away from the first insulating member 121", and the specific size of the first protrusion 1222 can be set as needed. The second insulating member 122 mainly abuts against the second plate member 22 (or the first plate member 21) via the first protrusion 1222.

[0065] The second insulating member 122 is made of insulating material, has self-lubricating property and slight elasticity, and can be deformed to a certain extent without being broken under pressure. Thus, by adopting the above scheme, by providing the first protrusion 1222 on the side of the second insulating member 122 facing away from the first insulating member 121, the second insulating member 122 can be brought into abutment with the second plate member 22 (or the first plate member 21) via the first protrusion 1222 with a smaller area. Based on this, the contact area between the second insulating member 122 and the second plate member 22 (or the first plate member 21) can be reduced via the first protrusion 1222, and the pressure per unit contact area between the second insulating member 122 and the second plate member 22 (or the first plate member 21) can be increased via the first protrusion 1222. Thus, during assembly, if there is a large interference between the fixing structure 12, the first plate member 21 and the second plate member 22, the second insulating member 122 can be more easily compressed and deformed slightly in the first direction y due to the larger and more concentrated pressing pressure, so that the fixing structure 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 fixing structure 12 between the first plate member 21 and the second plate member 22 can be reduced, the assembly convenience and efficiency of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be improved, and the risk of the second insulating member 122 lifting the second plate member 22 (or the first plate member 21) due to a large interference 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 combined application with the "the fixing structure 12 is interference-fitted between the first plate member 21 and the second plate member 22" embodiment, and the present embodiment is not compatible with the "the first connecting hole 1221 is a through hole and extends through to the side of the second insulating member 122 facing away from the first insulating member 121" embodiment.

[0066] Please refer to Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the side of the first insulating member 121 facing away from the second insulating member 122 is provided with a second protrusion 12121.

[0067] It should be noted that the side of the first insulating member 121 facing away from the second insulating member 122 is provided with the second protrusion 12121. The shape of the second protrusion 12121 can be set as needed, for example, it can be circular, polygonal, irregular, etc. The "projection area of the second protrusion 12121 on the side of the first insulating member 121 facing away from the second insulating member 122" is smaller than the "side area of the first insulating member 121 facing away from the second insulating member 122", and the specific size of the second protrusion 12121 can be set as needed. The first insulating member 121 mainly abuts against the first plate member 21 (or the second plate member 22) via the second protrusion 12121. For example, as shown in Figure 4 、 Figure 6As shown, in some embodiments, the first plate member 21 is provided with a boss 211 at a position corresponding to the first insulating member 121, and the first insulating member 121 mainly abuts against the boss 211 of the first plate member 21 via the second protrusion 12121. For example, in other embodiments, the first plate member 21 is a flat plate structure, and the first insulating member 121 mainly abuts against the plate surface of the first plate member 21 via the second protrusion 12121.

[0068] Since the first insulating member 121 is made of an insulating material, it has self-lubricating property and slight elasticity, and can be deformed to a certain extent without being easily broken when subjected to pressure. Thus, by adopting the above scheme, by providing the second protrusion 12121 on the side of the first insulating member 121 facing away from the second insulating member 122, the first insulating member 121 can be abutted against the first plate member 21 (or the second plate member 22) via the second protrusion 12121 with a smaller area, and based on this, the contact area between the first insulating member 121 and the first plate member 21 (or the second plate member 22) can be reduced via the second protrusion 12121, and the pressure intensity on the unit contact area between the first insulating member 121 and the first plate member 21 (or the second plate member 22) can be increased via the second protrusion 12121. Thus, in the assembly process, if there is a large interference between the fixing structure 12, the first plate member 21 and the second plate member 22, the first insulating member 121 can more easily produce slight compression deformation in the first direction y due to the larger and more concentrated pressing pressure, so that the fixing structure 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 fixing structure 12 between the first plate member 21 and the second plate member 22 can be reduced, the assembly convenience and efficiency of the fixing structure 12 between the first plate member 21 and the second plate member 22 can be improved, and the risk of the first insulating member 121 lifting the first plate member 21 (or the second plate member 22) due to a large interference 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 "the fixing structure 12 is interference-fitted between the first plate member 21 and the second plate member 22" embodiment. The present embodiment can be combined with the "the first connecting hole 1221 is a blind hole, and the first protrusion 1222 is provided on the side of the second insulating member 122 facing away from the first insulating member 121" embodiment, or can be combined with the "the first connecting hole 1221 is a through hole and penetrates to the side of the second insulating member 122 facing away from the first insulating member 121" embodiment.

[0069] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5In some embodiments of the present application, the first insulating member 121 comprises a second connecting portion 1212 connected to the side of the first connecting portion 1211 away from the second insulating member 122, and the filter housing 20 is provided with a second connecting hole 2111 at a position corresponding to the second connecting portion 1212, and the second connecting portion 1212 is inserted into the second connecting hole 2111.

[0070] It should be noted that the second connecting portion 1212 is integrally connected or separately connected to the side of the first connecting portion 1211 away from the second insulating member 122.

[0071] The filter housing 20 is provided with a second connecting hole 2111 at a position corresponding to the second connecting portion 1212. Figure 2 、 Figure 4 As shown in some embodiments, the side of the first insulating member 121 away from the second insulating member 122 abuts against the first plate member 21, in which case the first plate member 21 is provided with a second connecting hole 2111 at a position corresponding to the second connecting portion 1212. In other embodiments, the side of the first insulating member 121 away from the second insulating member 122 abuts against the second plate member 22, in which case the second plate member 22 is provided with a second connecting hole 2111 at a position corresponding to the second connecting portion 1212.

[0072] The second connecting portion 1212 is inserted into the second connecting hole 2111, and based on the insertion fit between the second connecting portion 1212 and the second connecting hole 2111, the first insulating member 121 can be directly planarly positioned relative to the first plate member 21 (or the second plate member 22), so that the planar position of the positioning and stabilizing structure 12 relative to the first plate member 21 and the second plate member 22 can be achieved, the planar movement of the positioning and stabilizing structure 12 relative to the first plate member 21 and the second plate member 22 can be limited, and the installation position and installation state of the positioning and stabilizing structure 12 between the first plate member 21 and the second plate member 22 can be optimized. The insertion fit between the second connecting portion 1212 and the second connecting hole 2111 can be an interference fit, a transition fit or a small gap fit.

[0073] As shown in some embodiments, the first plate member 21 (or the second plate member 22) is provided with a boss 211 at a position corresponding to the second connecting portion 1212, and the side of the boss 211 facing the first insulating member 121 is provided with a second connecting hole 2111, so that the height position of the positioning and stabilizing structure 12 and the coupling member 11 in the first direction y can be raised, and the structural strength and rigidity of the first plate member 21 (or the second plate member 22) can be maintained. Figure 2 、 Figure 4 In another embodiment, the second connecting hole 2111 can be provided on the plate surface of the first plate member 21 (or the second plate member 22).

[0074] By adopting the above scheme, the first insulating piece 121 can be inserted and matched into the second connecting hole 2111 through the second connecting part 1212, and is limited in position relative to the wall part plane of the second connecting hole 2111 of the filter shell 20. Based on this, the planar position of the fixing structure 12 relative to the first plate piece 21 and the second plate piece 22 can be quickly and reliably positioned and stably fixed. The planar movement of the fixing structure 12 relative to the first plate piece 21 and the second plate piece 22 can be limited. The installation position and installation state of the fixing structure 12 between the first plate piece 21 and the second plate piece 22 can be optimized. This is conducive to the installation position and installation state of the stable coupling piece 11, especially the height position of the stable coupling piece 11 between the first plate piece 21 and the second plate piece 22. The 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 applying the capacitive coupling assembly 10 can be improved. The failure rate and debugging cost of the filter applying the capacitive coupling assembly 10 can be reduced.

[0075] Of course, in other embodiments, the fixing structure 12 can be inserted into the first plate piece 21 and the second plate piece 22 through interference fit, so as to promote the planar position of the fixing structure 12 relative to the first plate piece 21 and the second plate piece 22 to be basically stable by friction force; the fixing structure 12 can also be completely fixed by being bonded, welded or the like with at least one of the first plate piece 21 and the second plate piece 22; and the like.

[0076] Please refer to Figure 2 , Figure 3 In some embodiments of the present application, the first insulating piece 121 further comprises a stop part 1213 arranged between the first connecting part 1211 and the second connecting part 1212. The stop part 1213 is at least partially protruding in the circumferential direction from the first connecting part 1211 and the second connecting part 1212. The stop part 1213 is stopped at the hole opening of the fixing hole 111 and the hole opening of the second connecting hole 2111.

[0077] It should be noted that the stop part 1213 is arranged between the first connecting part 1211 and the second connecting part 1212. The stop part 1213 is at least partially protruding in the circumferential direction from the first connecting part 1211 and the second connecting part 1212, that is, along the first direction y, the projection of the stop part 1213 is at least partially located outside the circumferential edge of the projection of the first connecting part 1211, and the projection of the stop part 1213 is at least partially located outside the circumferential edge of the projection of the second connecting part 1212.

[0078] Based on this, the stop portion 1213 and the first connecting portion 1211 can form a structure similar to a step or a shoulder. When the first connecting portion 1211 is inserted into the fixing hole 111, the stop portion 1213 can be limited and stopped at the opening of the fixing hole 111, so as to limit the stop portion 1213 from also being inserted into the fixing hole 111, and limit the coupling member 11 from continuing to move in the direction close to the stop portion 1213, so that the stop portion 1213 can be positioned and abut against and support the coupling member 11.

[0079] Similarly, the stop portion 1213 and the second connecting portion 1212 can form a structure similar to a step or a shoulder. When the second connecting portion 1212 is inserted into the second connecting hole 2111, the stop portion 1213 can be limited and stopped at the opening of the second connecting hole 2111, so as to limit the stop portion 1213 from also being inserted into the second connecting hole 2111, and limit the first insulating member 121 from continuing to move in the direction close to the second connecting hole 2111, so that the stop portion 1213 can be positioned and abut against the wall portion (for example, the first plate 21 or the second plate 22) of the filter housing 20 provided with the second connecting hole 2111, and the wall portion of the filter housing 20 provided with the second connecting hole 2111 can be positioned and support the first insulating member 121.

[0080] By adopting the above scheme, the first insulating member 121 can be limited and stopped at the opening of the fixing hole 111 and the opening of the second connecting hole 2111 by the stop portion 1213, so as to facilitate the accurate positioning of the first insulating member 121 in the fixing hole 111 and the second connecting hole 2111, and facilitate the first insulating member 121 to be positioned and abut between the coupling member 11 and the wall portion of the filter housing 20 provided with the second connecting hole 2111. Based on this, on the one hand, during assembly, the positioning and abutment between the stop portion 1213 and the wall portion of the filter housing 20 provided with the second connecting hole 2111, and the positioning and abutment between the stop portion 1213 and the coupling member 11, can quickly and accurately complete the positioning and assembly between the coupling member 11, the first insulating member 121, and the filter housing 20, so as to improve the assembly convenience, assembly efficiency, and assembly accuracy. On the other hand, in the filter product, the relative positions of the coupling member 11, the wall portion of the filter housing 20 provided with the second connecting hole 2111, and the first insulating member 121 in the first direction y can be effectively stabilized, the risk of loosening and falling of the first insulating member 121 and the coupling member 11 can be reduced, the risk of loosening and changing of the height position of the coupling member 11 between the first plate 21 and the second plate 22 can be reduced, and the coupling member 11 and the wall portion of the filter housing 20 provided with the second connecting hole 2111 can reliably be insulated via the stop portion 1213, so as to improve the consistency, structural reliability, and use reliability of the capacitive coupling assembly 10, improve the quality and yield of the filter using the capacitive coupling assembly 10, and reduce the failure rate and debugging cost of the filter using the capacitive coupling assembly 10.

[0081] Please refer to Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the second connecting portion 1212 abuts the hole bottom of the second connecting hole 2111 and partially protrudes out of the hole opening of the second connecting hole 2111, the second connecting portion 1212 at least partially protrudes in the circumferential direction from the first connecting portion 1211, and is stopped at the hole opening of the fixing hole 111.

[0082] It should be noted that the present embodiment is incompatible with the previous embodiment. In the present embodiment, the first insulating member 121 includes the first connecting portion 1211 and the second connecting portion 1212, but does not include the stopping portion 1213 as shown in Figure 2 .

[0083] It should be further noted that in the case where the second connecting portion 1212 is inserted into the second connecting hole 2111, the second connecting portion 1212 can abut the hole bottom of the second connecting hole 2111 to accurately position the second connecting portion 1212 in the second connecting hole 2111. Moreover, along the direction in which the second connecting hole 2111 is formed, the length of the second connecting portion 1212 is greater than the hole depth of the second connecting hole 2111, so that a part of the second connecting portion 1212 protrudes out of the hole opening of the second connecting hole 2111.

[0084] The second connecting portion 1212 at least partially protrudes in the circumferential direction from the first connecting portion 1211, i.e., along the first direction y, the projection of the second connecting portion 1212 at least partially locates outside the circumferential edge of the projection of the first connecting portion 1211, so that a structure similar to a step or a shoulder can be formed between the second connecting portion 1212 and the first connecting portion 1211. Based on this, in the case where the first connecting portion 1211 is inserted into the fixing hole 111, the part of the second connecting portion 1212 that protrudes out of the hole opening of the second connecting hole 2111 can be limited and stopped at the hole opening of the fixing hole 111, so as to limit the second connecting portion 1212 from also being inserted into the fixing hole 111, and also limit the coupling member 11 from continuing to move in the direction close to the second connecting portion 1212, so that the second connecting portion 1212 can be positioned to abut and support the coupling member 11, so that the coupling member 11 can be insulated and spaced from the wall portion of the filter housing 20 provided with the second connecting hole 2111 under the support of the second connecting portion 1212.

[0085] By adopting the above scheme, the first insulating piece 121 can be limited and stopped at the hole opening of the fixing hole 111 through the second connecting portion 1212, and abut against the hole bottom of the second connecting hole 2111, so as to facilitate the accurate positioning of the first insulating piece 121 in the fixing hole 111 and the second connecting hole 2111, facilitate the positioning of the first insulating piece 121 to abut between the coupling piece 11 and the hole bottom of the second connecting hole 2111, and facilitate the positioning of the first insulating piece 121 to support the coupling piece 11 and stably space the coupling piece 11 from the hole opening of the second connecting hole 2111. Based on this, on the one hand, during assembly, the positioning and assembly between the coupling piece 11, the first insulating piece 121 and the second connecting hole 2111 can be quickly and accurately completed through the positioning and abutting between the second connecting portion 1212 and the hole bottom of the second connecting hole 2111, and the positioning and abutting between the second connecting portion 1212 and the coupling piece 11, so that the assembly convenience, assembly efficiency and assembly accuracy can be improved. On the other hand, in the filter product, the relative positions of the coupling piece 11, the wall portion of the filter housing 20 provided with the second connecting hole 2111 and the first insulating piece 121 along the first direction y can be effectively stabilized, the risk of loosening and falling of the first insulating piece 121 and the coupling piece 11 can be reduced, the risk of loosening and changing of the height position of the coupling piece 11 between the first plate piece 21 and the second plate piece 22 can be reduced, and reliable insulation and spacing between the coupling piece 11 and the wall portion of the filter housing 20 provided with the second connecting hole 2111 can be ensured, so that the consistency, structural reliability and use reliability of the capacitive coupling assembly 10 can be improved, the quality and yield of the filter applying the capacitive coupling assembly 10 can be improved, and the failure rate and debugging cost of the filter applying the capacitive coupling assembly 10 can be reduced.

[0086] Please refer to Figure 2 、 Figure 4 In some embodiments of the present application, the second connecting portion 1212 is in interference fit with the second connecting hole 2111.

[0087] By adopting the above scheme, by means of the interference fit of the second connecting portion 1212 and the second connecting hole 2111, the contact tightness and connection stability between the second connecting portion 1212 and the second connecting hole 2111 can be improved, the risk of loosening and falling off of the second connecting portion 1212 in the second connecting hole 2111 can be reduced, and thus the stability of the mounting position and mounting state of the fixing structure 12 between the first plate 21 and the second plate 22 can be improved, the stability of the mounting position (especially the height position) and mounting state of the coupling piece 11 between the first plate 21 and the second plate 22 can be improved, and thus the consistency, structural reliability and use reliability of the capacitive coupling assembly 10 can be improved, and the quality and yield of the filter using the capacitive coupling assembly 10 can be improved. Moreover, based on the interference fit, a certain assembly tolerance can be allowed between the second connecting portion 1212 and the second connecting hole 2111, and thus the assembly convenience, assembly efficiency and assembly yield between the fixing structure 12 and the filter shell 20 can be improved.

[0088] Of course, in other embodiments, the second connecting portion 1212 and the second connecting hole 2111 can be transition fit or small gap fit.

[0089] Please refer to Figure 2 , Figure 4 In some embodiments of the present application, the first connecting portion 1211 and the fixing hole 111 are gap fit or transition fit.

[0090] By adopting the above scheme, by means of the small gap fit or transition fit of the first connecting portion 1211 and the fixing hole 111, it is convenient, fast and smooth to align the first connecting portion 1211 and pass it through the fixing hole 111 during assembly, and thus the assembly difficulty between the first connecting portion 1211 and the fixing hole 111 can be reduced, and the assembly convenience and efficiency between the first insulating piece 121 and the coupling piece 11 can be improved.

[0091] Of course, in other embodiments, the fit between the first connecting portion 1211 and the fixing hole 111 can be small interference fit.

[0092] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 In some embodiments of the present application, two fixing structures 12 are provided, and the two fixing structures 12 are respectively arranged at opposite ends of the coupling piece 11.

[0093] By adopting the above scheme, the opposite two ends of the coupling member 11 can be supported and fixed by the two fixing structures 12 respectively, and the opposite two ends of the coupling member 11 are not grounded. Based on this, on the one hand, the coupling member 11 can be provided with balanced and stable double support effect by the two fixing structures 12 with the same structure, which is beneficial to balance and accurately control the height position of the coupling member 11 between the first plate 21 and the second plate 22, thereby the stability of the coupling member 11 in the filter housing 20 can be enhanced, the controllability of the height position of the coupling member 11 between the first plate 21 and the second plate 22 can be improved, the consistency, structural reliability and use reliability of the capacitive coupling assembly 10 can be improved, and the quality and yield of the filter using the capacitive coupling assembly 10 can be improved. On the other hand, the opposite two ends of the coupling member 11 can be conveniently achieved by the two fixing structures 12 with the same structure, so that the capacitive coupling effect of the two resonant rods 30 through the coupling member 11 can be optimized, which helps to improve the performance, quality and stability of the filter.

[0094] Of course, in other embodiments, the fixing structure 12 can be provided with only one and arranged at one end of the coupling member 11, and the other end of the coupling member 11 can be suspended, grounded to the filter housing 20, or not grounded to the filter housing 20 through other components. In other embodiments, the fixing structure 12 can be provided with multiple, one of which is arranged at one end of the coupling member 11, and the other fixing structure 12 is arranged at any area (such as the middle area) of the coupling member 11 as needed.

[0095] Please refer to Figure 1 、 Figure 2 Some embodiments of the present application provide a filter, which comprises a filter housing 20 and a capacitive coupling assembly 10 provided by the embodiments of the present application.

[0096] It should be noted that the filter comprises a filter housing 20. The inside of the filter housing 20 has a closed inner cavity, which can realize the shielding function to prevent signal leakage. The plate on one side of the filter housing 20 is the first plate 21, and the plate on the side opposite to the first plate 21 of the filter housing 20 is the 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.

[0097] It also needs to be explained that 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 required and build the required coupling relationship. Wherein one end of the resonant rod 30 is connected and fixed to the wall part (such as the first plate 21 or the second plate 22, etc.) of the filter housing 20, 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. Wherein 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 be with or without a resonant disc; the resonant disc can be with or without a flange; the resonant rod 30 can be a circular rod, a polygonal rod, a special-shaped rod, a sheet resonant rod, a sheet metal resonant rod or a resonant rod of other shapes, etc.

[0098] It also needs to be explained that the filter further comprises a capacitive coupling assembly 10, which can be the capacitive coupling assembly 10 of any of the above embodiments of the 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.

[0099] By using the above scheme, the filter can build a capacitive coupling relationship by applying the capacitive coupling assembly 10 provided by the embodiments of the application, and improve the consistency, quality and yield of the filter, and reduce the failure rate and debugging cost of the filter.

[0100] The above is only an optional embodiment of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of the claims of the 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 component includes: A coupling element, wherein a fixing hole is provided through the coupling element; A fixing structure is provided, wherein the fixing structure abuts against the first plate and the second plate on opposite sides along its axial direction, and the fixing structure is planarly limited relative to at least one of the first plate and the second plate. The fixing structure includes a first insulating member and a second insulating member respectively disposed on opposite sides of the fixing hole. The first insulating member has a first connecting portion on the side facing the second insulating member, and the second insulating member has a first connecting hole on the side facing the first insulating member. The first connecting portion passes through the fixing hole and is inserted into the first connecting hole. The first insulating member and the second insulating member together clamp the coupling member therebetween.

2. The capacitive coupling component as described in claim 1, characterized in that, The material of the first insulating element is the same as that of the second insulating element.

3. The capacitive coupling component as described in claim 1, characterized in that, The fixing structure is interference-fitted between the first plate and the second plate.

4. The capacitive coupling component as described in claim 1, characterized in that, The first connecting hole is a through hole and extends to the side of the second insulating member opposite to the first insulating member.

5. The capacitive coupling component as described in claim 1, characterized in that, The first connecting hole is a blind hole, and the second insulating member has a first protrusion on the side facing away from the first insulating member.

6. The capacitive coupling component as claimed in claim 1, characterized in that, The first insulating member has a second protrusion on the side facing away from the second insulating member.

7. The capacitive coupling component as described in any one of claims 1-6, characterized in that, The first insulating member includes a second connecting part connected to the side of the first connecting part facing away from the second insulating member. The filter housing is provided with a second connecting hole at the position corresponding to the second connecting part, and the second connecting part is inserted into the second connecting hole.

8. The capacitive coupling component as described in claim 7, characterized in that, The first insulating member further includes a stop portion disposed between the first connecting portion and the second connecting portion, the stop portion protruding at least partially from the first connecting portion and the second connecting portion in the circumferential direction, and the stop portion stopping against the opening of the fixing hole and the opening of the second connecting hole.

9. The capacitive coupling component as claimed in claim 7, characterized in that, The second connecting part abuts against the bottom of the second connecting hole and is partially exposed outside the opening of the second connecting hole. The second connecting part protrudes at least partially from the first connecting part in the circumferential direction and stops at the opening of the fixing hole.

10. The capacitive coupling component as claimed in claim 7, characterized in that, The second connecting part is interference-fitted with the second connecting hole.

11. The capacitive coupling component as described in any one of claims 1-6, characterized in that, The first connecting part has a clearance fit or a transition fit with the fixing hole; And / or, the fixing structure is provided in two parts, and the two fixing structures are respectively located at opposite ends of the coupling member.

12. A filter, characterized in that, It includes a filter housing and a capacitive coupling component as described in any one of claims 1-11.

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