Cover plate assembly and cavity filter

Abstract

The utility model relates to the technical field of communication, and provides a cover plate assembly and a cavity filter, and the cover plate assembly comprises a cover plate which comprises a fixed part and a deformation part connected with the fixed part, the fixed part and the deformation part form an accommodation groove, and the deformation part comprises a deformation body and a first limiting part which is formed on the deformation body in a compression joint manner; the driving part is in threaded connection with the groove side wall of the accommodating groove; the adjusting piece comprises an adjusting body and a matching part connected to the end, close to the deformation part, of the adjusting body, the adjusting body is connected with the driving piece, and the matching part is located between the first limiting piece and the deformation body. When the cover plate assembly is assembled, the adjusting piece is firstly placed on the deformation body, and then the first limiting piece is formed through compression joint, so that the matching part is located between the first limiting piece and the deformation body, namely the adjusting piece is connected to the deformation part; due to the fact that the first limiting piece formed through compression joint can limit or compress the matching part, the problem that the end of the adjusting piece can be disengaged from the fixing hole of the deformation part is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a cover plate assembly and a cavity filter. Background Art

[0002] Cavity filters, as a frequency selection device, are widely used in the field of communications technology. They generally consist of a cavity, a resonator, and a cover assembly. The resonator is located within the cavity, and the cover assembly seals the opening of the cavity.

[0003] An existing cover assembly includes a cover, a driver, and an adjustment member. The cover includes a fixed portion and a deformable portion connected to the fixed portion. The fixed portion and the deformable portion form a receiving slot. The driver is threaded onto the sidewall of the receiving slot and is rotatably connected to the adjustment member. The deformable portion has a fixing hole, and the end of the adjustment member closest to the deformable portion is interference-fitted into the fixing hole. Rotating the driver drives the adjustment member along the depth direction of the cavity, thereby causing the deformable portion to deform and adjust the resonant frequency.

[0004] The end of the adjusting member is prevented from falling out of the fixing hole of the deforming portion by friction. When the friction is insufficient to overcome the driving force of the driving member, the end of the adjusting member may fall out of the fixing hole of the deforming portion. Utility Model Content

[0005] In view of this, embodiments of the present application provide a cover plate assembly and a cavity filter to solve the problem that the end of the adjustment member may fall out of the fixing hole of the deformation portion.

[0006] A first aspect of the present application provides a cover plate assembly, comprising:

[0007] The cover plate includes a fixed portion and a deformable portion connected to the fixed portion, wherein the fixed portion and the deformable portion form a receiving groove, and the deformable portion includes a deformable body and a first limiting member press-formed on the deformable body;

[0008] A driving member, threadedly connected to a side wall of the receiving groove;

[0009] The adjusting member includes an adjusting body and a matching portion connected to one end of the adjusting body close to the deformation portion. The adjusting body is connected to the driving member, and the matching portion is located between the first limiting member and the deformation body.

[0010] The cover assembly provided by the embodiments of the present application has the following beneficial effects: During assembly, the adjusting member is first placed on the deformable body, and then the first retaining member is crimped (e.g., by pressing, riveting, extruding, stamping, etc.) so that the mating portion is positioned between the first retaining member and the deformable body, thereby achieving connection of the adjusting member to the deformable portion. In this assembly method, the crimped first retaining member can position or tighten the mating portion in the depth direction of the cavity, thereby resolving the problem of the end of the adjusting member potentially falling out of the fixing hole of the deformable portion.

[0011] In some embodiments, the driving member is rotatably connected to the adjusting body, and the matching portion is fixedly connected between the first limiting member and the deformable body.

[0012] In some embodiments, the driving member is fixedly connected or integrally connected to the adjusting body, and the matching portion is rotatably connected between the first limiting member and the deformable body.

[0013] In some embodiments, the driving member is rotatably connected to the adjusting body, and the matching portion is rotatably connected between the first limiting member and the deformable body.

[0014] In some embodiments, the driving member has a through hole, and the adjusting member further includes a second limiting member and a third limiting member provided on the adjusting body, the second limiting member and the third limiting member are arranged at intervals along the axial direction of the adjusting body, the adjusting body passes through the through hole, the second limiting member abuts against the side of the driving member facing the deformation portion, and the third limiting member is on the side of the driving member facing away from the deformation portion, and is used to limit or press the driving member.

[0015] In some embodiments, the adjusting body has a first slot, and the second limiting member is a first retaining spring engaged in the first slot; or, the second limiting member is a step surface on the adjusting body.

[0016] In some embodiments, the adjustment body has a second slot, and the third limiting member is a second retaining spring clamped in the second slot; or, the third limiting member is a second limiting flange or limiting protrusion crimped and formed on the adjustment body.

[0017] In some embodiments, the first limiting member is a first limiting flange extruded from outside to inside along the radial direction of the adjusting member.

[0018] In some embodiments, the driving member is provided with an operating hole for driving the driving member to rotate.

[0019] A second aspect of the present application provides a cavity filter, which includes a cavity and a cover plate assembly as described in the first aspect, wherein the cover plate assembly is arranged at the opening of the cavity.

[0020] The cavity filter adopts any one or more embodiments of the above-mentioned cover plate assembly, and thus has the beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or conventional technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0024] Figure 2 yes Figure 1 A cross-sectional view of the cavity filter taken along the AA direction is shown;

[0025] Figure 3 yes Figure 2 a cross-sectional view of the middle cover assembly;

[0026] Figure 4 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0027] Figure 5 yes Figure 4 A cross-sectional view of the cavity filter taken along the BB direction is shown;

[0028] Figure 6 yes Figure 5 Cross-sectional view of the middle cover assembly.

[0029] The meanings of the marks in the figure are:

[0030] 100, cavity filter;

[0031] 10. Cavity; 11. Support platform; 12. Positioning boss;

[0032] 20. Cover plate assembly; 21. Cover plate; 211. Fixing portion; 212. Deformation portion; 2121. Deformation body; 2122. First stopper; 22. Driving member; 221. Perforation; 222. Operation hole; 23. Adjustment member; 231. Adjustment body; 2311. Second stopper; 23111. Step surface; 2312. Third stopper; 23121. Second retaining spring; 2313. Second retaining slot; 232. Mating portion; 24. Accommodation slot;

[0033] 30. Resonant element; 31. Center hole. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0037] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0041] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0042] The embodiment of the first aspect of the present application provides a cover plate assembly for a cavity filter. Figures 1 to 3 The cover assembly 20 includes a cover 21, a driving member 22, and an adjusting member 23. The cover 21 includes a fixing portion 211 and a deforming portion 212 connected to the fixing portion 211. The fixing portion 211 and the deforming portion 212 form a receiving groove 24. The deforming portion 212 includes a deforming body 2121 and a first limiting member 2122 crimped onto the deforming body 2121. The driving member 22 is threadedly connected to the side wall of the receiving groove 24. The adjusting member 23 includes an adjusting body 231 and a matching portion 232. The matching portion 232 is connected to one end of the adjusting body 231 near the deforming portion 212. The adjusting body 231 is connected to the driving member 22, and the matching portion 232 is located between the first limiting member 2122 and the deforming body 2121.

[0043] The cover plate 21 is used to seal the opening of the cavity 10 , wherein the cover plate 21 is made of a metal material, for example, the metal material may be aluminum, iron, steel, copper, etc.

[0044] It can be understood that the cover plate 21 can be formed as one piece, that is, the thinned area located in the middle of the cover plate 21 forms the deformation portion 212, and the unthinned area located at the edge of the cover plate 21 forms the fixing portion 211; or, the cover plate 21 includes a ring plate and a deformation plate, and the ring plate and the deformation plate can be fixedly connected by welding, bonding, fastener connection, clamping, crimping, riveting, etc., wherein the fixing portion 211 is located on the ring plate, and the deformation portion 212 is located on the deformation plate.

[0045] The cover plate 21 is fixed to the cavity 10 through the fixing portion 211, wherein the fixing portion 211 can be fixed to the cavity 10 by welding, fastener connection, bonding, clamping, riveting, pressing, etc.; and the deforming portion 212 can be deformed under the action of external force to approach or move away from the resonant component 30, thereby adjusting the resonant frequency.

[0046] The fixing portion 211 and the deforming portion 212 form a receiving groove 24, and the opening of the receiving groove 24 faces away from the resonant component 30. It can be understood that the inner side wall of the fixing portion 211 constitutes the groove side wall of the receiving groove 24, and the side wall of the deforming portion 212 facing away from the resonant component 30 constitutes the groove bottom wall of the receiving groove 24; optionally, the receiving groove 24 is a circular groove.

[0047] The driving member 22 is threadedly connected to the side wall of the accommodating groove 24. It can be understood that the side wall of the accommodating groove 24 is provided with an internal thread, the driving member 22 has a certain thickness, and the outer side wall of the driving member 22 is provided with an external thread that cooperates with the internal thread; or, the side wall of the accommodating groove 24 is provided with an internal thread, the thickness of the driving member 22 is relatively thin, and the edge of the driving member 22 is between two adjacent threads of the internal thread.

[0048] The internal thread may be provided on the entire side wall of the accommodating groove 24 , or may be provided on a portion of the side wall of the accommodating groove 24 .

[0049] The driving member 22 may be plate-shaped or block-shaped. Optionally, the driving member 22 is made of a metal material, such as aluminum, iron, steel, copper, etc. Alternatively, the driving member 22 is made of a non-metallic material, such as plastic, ceramic, or wood.

[0050] The mating portion 232 is connected to one end of the adjusting body 231 close to the deformation portion 212. It can be understood that the mating portion 232 can be integrally formed and connected with the adjusting body 231, and the mating portion 232 can also be separately connected with the adjusting body 231 by using but not limited to welding, bonding, threaded connection, screw fastening, crimping, clamping, plugging, riveting and the like.

[0051] The deformation portion 212 includes a deformation body 2121 and a first position-limiting member 2122 formed by compression molding on the deformation body 2121. The compression molding may be press molding, extrusion molding, riveting molding, stamping molding, or the like.

[0052] The first limiting member 2122 can be an annular limiting member or a C-shaped limiting member arranged around the matching portion 232; or, the first limiting member 2122 includes a plurality of limiting portions (such as flange sections, protrusions, etc.) arranged at intervals along the circumference of the matching portion 232.

[0053] The driving member 22 is connected to the adjusting body 231, and the matching portion 232 is located between the first limiting member 2122 and the deformable body 2121. It can be understood that the driving member 22 and the adjusting body 231 are rotatably connected, and the matching portion 232 is fixedly connected between the first limiting member 2122 and the deformable body 2121; or the driving member 22 and the adjusting body 231 are fixedly connected or integrally connected, and the matching portion 232 is rotatably connected between the first limiting member 2122 and the deformable body 2121; or the driving member 22 and the adjusting body 231 are rotatably connected, and the matching portion 232 is rotatably connected between the first limiting member 2122 and the deformable body 2121.

[0054] The driving member 22 is rotatably connected to the adjusting body 231 , which means that the driving member 22 can rotate around its own axis relative to the adjusting body 231 , but cannot move relative to the adjusting body 231 in the depth direction of the cavity 10 .

[0055] The driving member 22 is fixedly connected or integrally connected to the adjusting body 231 , which means that the driving member 22 can neither rotate around its own axis relative to the adjusting body 231 nor move relative to the adjusting body 231 in the depth direction of the cavity 10 .

[0056] Among them, the matching part 232 is fixedly connected between the first limiting member 2122 and the deformable body 2121, which means that the first limiting member 2122 presses the matching part 232 onto the deformable body 2121, so that the adjusting member 23 can neither rotate around its own axis relative to the deformable part 212 nor move relative to the deformable part 212 in the depth direction of the cavity 10.

[0057] Among them, the matching part 232 is rotatably connected between the first limiting member 2122 and the deformable body 2121, which means that the first limiting member 2122 limits the matching part 232 on the deformable body 2121, so that the adjusting member 23 can rotate around its own axis relative to the deformable part 212, but cannot move relative to the deformable part 212 in the depth direction of the cavity 10.

[0058] It can be understood that in the radial direction of the adjusting member 23 , the matching portion 232 protrudes from the outer peripheral surface of the adjusting body 231 , so that the first limiting member 2122 can limit or press the matching portion 232 .

[0059] The cover assembly 20 provided by the embodiment of the present application has the following beneficial effects: During assembly, the adjusting member 23 is first placed on the deformable body 2121, and then the first retaining member 2122 is crimped (e.g., by pressing, riveting, extruding, stamping, etc.) so that the mating portion 232 is positioned between the first retaining member 2122 and the deformable body 2121, thereby achieving connection of the adjusting member 23 to the deformable portion 212. In this assembly method, the crimped first retaining member 2122 can position or compress the mating portion 232 in the depth direction of the cavity 10, thereby resolving the problem of the end of the adjusting member 23 potentially falling out of the fixing hole of the deformable portion 212.

[0060] Please also refer to Figures 1 to 3 In some embodiments, the driving member 22 has a through-hole 221, and the adjusting member 23 further includes a second limiting member 2311 and a third limiting member 2312 provided on the adjusting body 231. The second limiting member 2311 and the third limiting member 2312 are arranged at intervals along the axial direction of the adjusting body 231. The adjusting body 231 passes through the through-hole 221, and the second limiting member 2311 abuts against the side of the driving member 22 facing the deformation portion 212. The third limiting member 2312 is located on the side of the driving member 22 facing away from the deformation portion 212, and is used to limit or press the driving member 22.

[0061] It can be understood that the perforation 221 can be a circular hole, an elliptical hole, a polygonal hole, etc.

[0062] It can be understood that the second limit member 2311 can be integrally connected to the adjusting body 231, for example, the second limit member 2311 and the adjusting body 231 are integrally formed by a mold or by machining; or, the second limit member 2311 can also be fixedly connected to the adjusting body 231, for example, the second limit member 2311 is fixed to the adjusting body 231 by welding, bonding, clamping, riveting, plugging, threading, etc.

[0063] It can be understood that the third limit member 2312 can be integrally connected to the adjusting body 231, for example, the third limit member 2312 is crimped onto the adjusting body 231; or, the third limit member 2312 can also be fixedly connected to the adjusting body 231, for example, the third limit member 2312 is fixed to the adjusting body 231 by welding, bonding, clamping, riveting, plugging, threading, etc.

[0064] The second limiting member 2311 abuts against the side of the driving member 22 facing the deformation portion 212. It can be understood that the second limiting member 2311 abuts against the edge of the through hole 221 at one end close to the deformation portion 212. Optionally, the second limiting member 2311 is annular in shape.

[0065] The second limiting member 2311 abuts against the side of the driving member 22 facing the deformation portion 212, and the third limiting member 2312 is located on the side of the driving member 22 facing away from the deformation portion 212. It can be understood that the third limiting member 2312 and the second limiting member 2311 are respectively located on opposite sides of the driving member 22 in the depth direction of the cavity 10. When the second limiting member 2311 and the third limiting member 2312 limit the driving member 22, that is, the inner edge of the driving member 22 is limited between the second limiting member 2311 and the third limiting member 2312, so that the driving member 22 can rotate around its own axis relative to the adjusting member 23, but cannot move relative to the adjusting member 23 in the depth direction of the cavity 10; when the second limiting member 2311 and the third limiting member 2312 press the driving member 22, that is, the inner edge of the driving member 22 is pressed between the second limiting member 2311 and the third limiting member 2312, so that the driving member 22 can neither rotate around its own axis relative to the adjusting member 23 nor move relative to the adjusting member 23 in the depth direction of the cavity 10.

[0066] Based on the above solution, the third limiter 2312 is arranged on the side of the driving member 22 facing away from the deformation portion 212, so that the third limiter 2312 is fixedly connected to the adjustment body 231, or the third limiter 2312 is integrally connected to the adjustment body 231.

[0067] In other embodiments, the driving member 22 does not have the through hole 221 , and the driving member 22 and the adjusting member 23 are integrally connected, that is, the driving member 22 and the adjusting member 23 are integrally formed.

[0068] Please refer to Figure 3 In some embodiments, the second limiting member 2311 is a step surface 23111 on the adjustment body 231 .

[0069] The stepped surface 23111 is integrally formed with the adjusting body 231. The stepped surface 23111 and the adjusting body 231 can be integrally formed using a mold; alternatively, the stepped surface 23111 and the adjusting body 231 can be integrally formed using machining, such as by machining the adjusting body 231 using cutting, milling, lathing, or other machining methods. By configuring the second stopper 2311 as the stepped surface 23111, since the stepped surface 23111 and the adjusting body 231 are integrally formed, the number of materials required is reduced. Furthermore, the stepped surface 23111 has a simple structure and is easier to machine.

[0070] In some embodiments, the second stopper 2311 is separately and fixedly connected to the adjustment body 231. For example, the adjustment body 231 has a first retaining groove (not shown in the figure), and the second stopper 2311 is a first retaining spring (not shown in the figure) that is engaged with the first retaining groove; the first retaining spring is C-shaped; correspondingly, the first retaining groove can be an annular retaining groove or a C-shaped retaining groove.

[0071] Please refer to Figure 3 In some embodiments, the adjustment body 231 has a second slot 2313 , and the third limiting member 2312 is a second retaining spring 23121 that is engaged in the second slot 2313 .

[0072] The second retaining spring 23121 is in a C-shape; correspondingly, the second retaining groove 2313 can be an annular retaining groove or a C-shaped retaining groove.

[0073] In the depth direction of the cavity 10, the side of the driving member 22 facing the deformable portion 212 is limited by the second limiting member 2311, and the side of the driving member 22 facing away from the deformable portion 212 is limited by the second retaining spring 23121. When the second limiting member 2311 and the second retaining spring 23121 limit the driving member 22, a rotatable connection between the adjustment body 231 and the driving member 22 is achieved; when the second limiting member 2311 and the second retaining spring 23121 press against the driving member 22, a fixed connection between the adjustment body 231 and the driving member 22 is achieved.

[0074] Based on the above solution, after the adjusting body 231 passes through the through hole 221 , the second clamping spring 23121 is clamped in the second clamping groove 2313 , making the assembly of the adjusting member 23 and the driving member 22 simpler and more convenient.

[0075] In other embodiments, the adjustment body 231 is provided with a threaded hole, and the third limiting member 2312 is a limiting screw screwed into the threaded hole; that is, in the depth direction of the cavity 10, the side of the driving member 22 facing the deformable portion 212 is limited by the second limiting member 2311, and the side of the driving member 22 facing away from the deformable portion 212 is limited by the head of the limiting screw. When the second limiting member 2311 and the head of the limiting screw limit the driving member 22, a rotatable connection between the adjustment body 231 and the driving member 22 is achieved; when the second limiting member 2311 and the head of the limiting screw press against the driving member 22, a fixed connection between the adjustment body 231 and the driving member 22 is achieved.

[0076] Please also refer to Figures 4 to 6 In some embodiments, the third limiting member 2312 is a second limiting flange crimped and formed on the adjusting body 231 .

[0077] Among them, the crimping molding can be press molding, extrusion molding, riveting molding, stamping molding, etc.

[0078] Optionally, the third limiting member 2312 is a second limiting flange extruded from the inside to the outside on the adjusting body 231 along the radial direction of the adjusting member 23 .

[0079] It can be understood that the second limiting flange can be an annular limiting flange or a C-shaped limiting flange arranged around the adjusting member 23. In this way, the size of the third limiting member 2312 is relatively large, which is conducive to increasing the structural strength of the third limiting member 2312 and can stably limit or press the driving member 22; or, the second limiting flange can also include a plurality of flange segments arranged at circumferential intervals along the adjusting member 23. Since the size of the flange segments is relatively small, it is conducive to extrusion molding.

[0080] Optionally, a plurality of flange segments are evenly spaced around the adjusting member 23 to ensure that the driving member 22 is evenly stressed.

[0081] Before molding, the third limiting member 2312 is in a vertical state, and the driving member 22 is placed on the second limiting member 2311 of the adjusting body 231; during molding, the molding tool squeezes the third limiting member 2312 from the inside to the outside; after molding, the third limiting member 2312 is in an inclined state to limit or press the driving member 22.

[0082] In other embodiments, the third limiting member 2312 is a limiting protrusion crimped and formed on the adjusting body 231 .

[0083] Optionally, the third limiting member 2312 is a limiting protrusion formed by riveting and / or stamping on the adjusting body 231 in the thickness direction of the cover plate 21 .

[0084] It can be understood that the limiting protrusion can be an annular limiting protrusion or a C-shaped limiting protrusion arranged around the adjusting member 23. In this way, the size of the third limiting member 2312 is relatively large, which is conducive to increasing the structural strength of the third limiting member 2312 and can stably limit or press the driving member 22; or, the limiting protrusion can also include a plurality of protrusions arranged at circumferential intervals along the adjusting member 23. Since the size of the protrusions is relatively small, it is conducive to riveting or stamping.

[0085] Optionally, a plurality of protrusions are evenly spaced around the adjusting member 23 to ensure that the driving member 22 is evenly stressed.

[0086] When the limiting protrusion is an annular limiting protrusion or a C-shaped limiting protrusion arranged around the adjusting member 23, the limiting protrusion can be formed entirely by riveting or stamping, or a part of the limiting protrusion can be formed by riveting and a part by stamping.

[0087] When the limiting protrusion includes a plurality of convex points arranged at intervals along the circumference of the adjusting member 23, all the convex points can be formed by riveting, all the convex points can be formed by stamping, or some of the convex points can be formed by riveting and other parts can be formed by stamping.

[0088] Please refer to Figure 3 and Figure 6 In some embodiments, the first limiting member 2122 is a first limiting flange extruded from outside to inside along the radial direction of the adjusting member 23.

[0089] It can be understood that the first limiting flange can be an annular limiting flange or a C-shaped limiting flange arranged around the adjusting member 23. In this way, the size of the first limiting member 2122 is relatively large, which is conducive to increasing the structural strength of the first limiting member 2122 and can stably limit or press the matching part 232 of the adjusting member 23; or, the first limiting flange can also include a plurality of flange sections arranged at intervals along the circumference of the adjusting member 23. Since the size of the flange section is relatively small, it is conducive to extrusion molding.

[0090] Optionally, a plurality of flange segments are evenly spaced around the adjusting member 23 to ensure that the adjusting member 23 is evenly stressed.

[0091] Before molding, the first limiting member 2122 is in a vertical state, and the adjusting member 23 is placed on the deformed body 2121; during molding, the molding tool squeezes the first limiting member 2122 from the outside to the inside; after molding, the first limiting member 2122 is in an inclined state to limit or press the matching portion 232 of the adjusting member 23.

[0092] In other embodiments, the first limiting member 2122 may also adopt other crimping methods.

[0093] Please refer to Figures 1 to 3 In some embodiments, the driving member 22 is provided with an operating hole 222 for rotating the driving member 22. A hand or an external tool is inserted into the operating hole 222 to drive the driving member 22 to rotate.

[0094] It is understood that one or more operation holes 222 may be provided. When there are multiple operation holes 222 , the multiple operation holes 222 are arranged at intervals along the circumference of the driving member 22 .

[0095] It can be understood that the driving member 22 can be an elastic driving plate or a rigid driving plate.

[0096] By adopting the above technical solution, the operating hole 222 is used to facilitate driving the driving member 22 to rotate. At the same time, providing the operating hole 222 on the driving member 22 is also helpful in reducing the weight of the driving member 22.

[0097] In other embodiments, the operating hole 222 may not be provided on the driving member 22. Instead, an operating protrusion may be provided on the side of the driving member 22 facing away from the deformable portion 212, so that a human hand or an external tool can use the operating protrusion to drive the driving member 22 to rotate. Of course, it is also possible to provide the operating hole 222 on the driving member 22 while also providing the operating protrusion on the side of the driving member 22 facing away from the deformable portion 212.

[0098] The operating protrusion may be integrally formed with the driving member 22 , or the operating protrusion may be fixed to the driving member 22 by welding, bonding, threaded connection, riveting, pressing, or the like.

[0099] The second aspect of the present application provides a cavity filter 100. Please also refer to Figures 1 to 3 The cavity filter 100 includes a cavity 10 and a cover plate assembly 20 as in the first aspect, and the cover plate assembly 20 covers the opening of the cavity 10 .

[0100] The shape of the cavity 10 is not limited in this application. For example, the cavity 10 may be in the shape of a cylindrical structure, an elliptical cylindrical structure, a prismatic structure, etc. When the cavity 10 is a prismatic structure, the cavity 10 may be in the shape of a quadrangular prism, a pentagonal prism, a hexagonal prism, etc. The cavity 10 is made of a metal material, for example, aluminum, iron, steel, copper, etc.

[0101] A resonator 30 is provided within the cavity 10. It is understood that the resonator 30 can be located at the center of the cavity 10, i.e., the central axis of the resonator 30 coincides with the central axis of the cavity 10; alternatively, the resonator 30 can be located offset from the center of the cavity 10, i.e., the central axis of the resonator 30 is parallel to the central axis of the cavity 10. The resonator 30 can be a metal resonator or a dielectric resonator. When the resonator 30 is a dielectric resonator, it can be made of a ceramic material.

[0102] It can be understood that the resonant element 30 can be a resonant disk, a resonant column, a resonant rod, etc.

[0103] The cover plate 21 covers the opening of the cavity 10, and the cover plate 21 is spaced apart from the resonator 30, that is, the cover plate 21 does not contact the resonator 30. It is understood that the cover plate 21 can be fixed to the cavity 10 by bonding, welding, fastener connection, riveting, pressing, etc.

[0104] Please refer to Figure 3 In some embodiments, the resonator 30 has a central hole 31, and the bottom of the cavity 10 is provided with a positioning boss 12 extending into the central hole 31. The central hole 31 can be a blind hole or a through hole.

[0105] Optionally, the center hole 31 is a circular hole, and correspondingly, the positioning boss 12 is a circular boss.

[0106] It can be understood that the positioning boss 12 can be integrally formed with the bottom wall of the cavity 10, and the positioning boss 12 can also be fixed to the bottom wall of the cavity 10 by welding, bonding, threaded connection, crimping, riveting, etc.

[0107] By extending the positioning boss 12 into the central hole 31 , the positioning boss 12 limits the resonator 30 in the radial direction of the resonator 30 to prevent the resonator 30 from moving in the cavity 10 along its radial direction; at the same time, the resonator 30 is fixed on the positioning boss 12 .

[0108] In other embodiments, the positioning boss 12 may not be provided at the bottom of the cavity 10, and the resonator 30 may be directly fixedly connected to the bottom wall of the cavity 10. For example, the resonator 30 may be directly fixedly connected to the bottom wall of the cavity 10 by welding, bonding, threaded connection, fastener connection, riveting, etc.; or, the resonator 30 may be integrally formed with the bottom wall of the cavity 10.

[0109] Please refer to Figure 3 In some embodiments, a support platform 11 is further provided at the bottom of the cavity 10 , and a positioning boss 12 is located on the support platform 11 .

[0110] In the radial direction of the resonator 30, the size of the support platform 11 is larger than the size of the positioning boss 12, that is, the projection of the positioning boss 12 in the depth direction of the cavity 10 is within the projection of the support platform 11 in the depth direction of the cavity 10, and the lower end of the resonator 30 can be supported on the support platform 11.

[0111] It can be understood that the positioning boss 12 can be integrally formed with the support platform 11, and the positioning boss 12 can also be fixed to the support platform 11 by welding, bonding, threaded connection, crimping, riveting, etc.

[0112] It can be understood that the support platform 11 can be integrally formed with the bottom wall of the cavity 10, that is, the positioning boss 12, the support platform 11 and the bottom wall of the cavity 10 can be integrally formed; or, the support platform 11 can also be fixed to the bottom wall of the cavity 10 by welding, bonding, threaded connection, crimping, riveting, etc.

[0113] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A cover plate assembly, characterized in that: include: The cover plate includes a fixed portion and a deformable portion connected to the fixed portion, wherein the fixed portion and the deformable portion form a receiving groove, and the deformable portion includes a deformable body and a first limiting member press-formed on the deformable body; A driving member, threadedly connected to a side wall of the receiving groove; The adjusting member includes an adjusting body and a matching portion connected to one end of the adjusting body close to the deformation portion. The adjusting body is connected to the driving member, and the matching portion is located between the first limiting member and the deformation body.

2. The cover plate assembly according to claim 1, wherein: The driving member is rotatably connected to the adjusting body, and the matching portion is fixedly connected between the first limiting member and the deformable body.

3. The cover plate assembly according to claim 1, wherein: The driving member is fixedly connected or integrally connected to the adjusting body, and the matching portion is rotatably connected between the first limiting member and the deformable body.

4. The cover plate assembly according to claim 1, wherein: The driving member is rotatably connected to the adjusting body, and the matching portion is rotatably connected between the first limiting member and the deformable body.

5. The cover plate assembly according to claim 1, wherein: The driving member has a through hole, and the adjusting member also includes a second limiting member and a third limiting member provided on the adjusting body. The second limiting member and the third limiting member are arranged at intervals along the axial direction of the adjusting body. The adjusting body passes through the through hole, and the second limiting member abuts against the side of the driving member facing the deformation portion. The third limiting member is on the side of the driving member facing away from the deformation portion, and is used to limit or press the driving member.

6. The cover plate assembly according to claim 5, wherein: The adjusting body has a first clamping groove, and the second limiting member is a first clamping spring clamped in the first clamping groove; or the second limiting member is a step surface on the adjusting body.

7. The cover plate assembly according to claim 5, wherein: The adjusting body has a second clamping groove, and the third limiting member is a second clamping spring clamped in the second clamping groove; or the third limiting member is a second limiting flange or limiting protrusion press-formed on the adjusting body.

8. The cover plate assembly according to any one of claims 1 to 7, wherein: The first limiting member is a first limiting flange that is extruded from outside to inside along the radial direction of the adjusting member.

9. The cover plate assembly according to any one of claims 1 to 7, wherein: The driving member is provided with an operating hole for driving the driving member to rotate.

10. A cavity filter, characterized in that: The invention comprises a cavity and a cover plate assembly according to any one of claims 1 to 9, wherein the cover plate assembly is arranged at the opening of the cavity.

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