Cavity filter and cover plate assembly

Abstract

The utility model relates to the technical field of communication, and provides a cavity filter and a cover plate assembly, the cover plate assembly comprises a cover plate, a driving part and an adjusting part, the cover plate comprises a fixed part and a deformation part connected with the fixed part, the fixed part and the deformation part define a containing groove, the driving part is an annular part, and the outer edge of the driving part is in threaded connection with the groove side wall of the containing groove; the adjusting piece comprises an adjusting body and a first limiting piece formed at the end of the adjusting body in a compression joint mode. The inner edge of the driving piece is located between the adjusting body and the first limiting piece. One end of the adjusting body away from the first limiting piece is connected with the deformation part. According to the cover plate assembly, the inner edge of the driving part is located between the first limiting part and the adjusting body, that is, the first limiting part can limit or press the inner edge of the driving part on the adjusting body, and the driving part is connected to the adjusting part. Due to the fact that the first limiting piece is formed on the adjusting body in a compression joint mode, looseness is avoided, and the problem that a screw is prone to looseness after being used for a long time is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a cavity filter and a cover plate assembly. 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 enclose a receiving slot. The driver is threadedly connected to the sidewall of the receiving slot, and the adjustment member is connected to the deformable portion. A screw is threadedly connected to the end of the adjustment member away from the deformable portion, and the driver is positioned between the adjustment member and the screw head. 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] However, since the screw is threadedly connected to the adjusting member, it is easy to become loose after long-term use, and may rotate along with the driving member or even fall off, which is not conducive to the adjustment of the resonant frequency. Utility Model Content

[0005] In view of this, an embodiment of the present application provides a cavity filter and a cover plate assembly to solve the problem that screws are prone to loosening after long-term use.

[0006] The first aspect of the present application proposes a cover assembly, including a cover, a driving member and an adjusting member, the cover including a fixing portion and a deforming portion connected to the fixing portion, the fixing portion and the deforming portion forming a receiving groove, the driving member being an annular member, the outer edge of the driving member being threadedly connected to the side wall of the receiving groove; the adjusting member including an adjusting body and a first limiting member, the first limiting member being crimped and formed at the end of the adjusting body, the inner edge of the driving member being located between the adjusting body and the first limiting member; the end of the adjusting body away from the first limiting member is connected to the deforming portion.

[0007] The cover assembly provided by the embodiments of the present application has the following beneficial effects: During assembly, the driver is first placed on the adjustment body, and then the first stopper is crimped (e.g., by pressing, riveting, extruding, stamping, etc.) so that the inner edge of the driver is positioned between the first stopper and the adjustment body. In other words, the first stopper can position or press the inner edge of the driver against the adjustment body, thereby connecting the driver to the adjustment body. Because the first stopper is crimped and formed on the adjustment body, it will not loosen, solving the problem of screws becoming loose after prolonged use.

[0008] In some embodiments, the inner edge of the driving member is rotatably connected between the adjusting body and the first limiting member, and one end of the adjusting body away from the first limiting member is fixedly connected or integrally connected to the deformation portion.

[0009] In some embodiments, an inner edge of the driving member is fixedly connected between the adjusting body and the first limiting member, and an end of the adjusting body away from the first limiting member is rotatably connected to the deformation portion.

[0010] In some embodiments, an inner edge of the driving member is rotatably connected between the adjusting body and the first limiting member, and an end of the adjusting body away from the first limiting member is rotatably connected to the deformation portion.

[0011] In some embodiments, the deformation portion has a connecting groove with an opening toward the driving member, and an annular clamping groove is provided on the side wall of the connecting groove; the end of the adjustment body away from the first limiting member is provided with a clamping portion, and the clamping portion is clamped in the annular clamping groove.

[0012] In some embodiments, the deformation portion has a connecting groove with an opening toward the driving member, and an annular clamping groove is provided on the side wall of the connecting groove; a mating portion is provided at one end of the adjustment body away from the first limiting member, and the mating portion is located in the connecting groove; the cover assembly also includes a retaining spring located in the connecting groove and clamped in the annular clamping groove, and the retaining portion is limited between the retaining spring and the bottom wall of the connecting groove.

[0013] In some embodiments, the first limiting member is a first limiting flange extruded from inside to outside along the radial direction of the adjusting member.

[0014] In some embodiments, the first limiting member is a limiting protrusion formed by riveting and / or stamping in the thickness direction of the cover plate.

[0015] In some embodiments, the driving member is provided with an operating hole for driving the driving member to rotate.

[0016] 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.

[0017] 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.

[0018] 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

[0019] 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.

[0020] Figure 1 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0021] Figure 2 yes Figure 1 A cross-sectional view of the cavity filter taken along the AA direction is shown;

[0022] Figure 3 yes Figure 2 a cross-sectional view of the middle cover assembly;

[0023] Figure 4 is a cross-sectional view of a cover plate assembly provided in some other embodiments of the present application;

[0024] Figure 5 It is a cross-sectional view of the cover assembly provided in some further embodiments of the present application.

[0025] The meanings of the marks in the figure are:

[0026] 100, cavity filter;

[0027] 10. Cavity;

[0028] 20. Cover plate assembly; 21. Cover plate; 211. Fixing portion; 212. Deformation portion; 2121. Connecting groove; 21211. Annular retaining groove; 22. Driving member; 221. Perforation; 222. Operating hole; 23. Adjusting member; 231. Adjusting body; 2311. Connecting portion; 2312. Fitting portion; 232. First position limiting member; 24. Accommodating groove; 25. Circlip;

[0029] 30. Resonant component. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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 driving member 22 is an annular member. The outer edge of 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 first limiting member 232. The first limiting member 232 is crimped and formed at the end of the adjusting body 231. The inner edge of the driving member 22 is between the adjusting body 231 and the first limiting member 232; the end of the adjusting body 231 away from the first limiting member 232 is connected to the deforming portion 212.

[0039] The cover plate 21 is used to seal the opening of the cavity 10. The cover plate 21 is made of metal material, for example, the metal material can be aluminum, iron, steel, copper, etc.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The driving member 22 is an annular member, that is, the driving member 22 has a through hole 221, and the through hole 221 can be used for the adjustment member 23 to pass through. The through hole 221 can be a circular hole, an elliptical hole, a polygonal hole, etc.

[0044] The outer edge of 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 matches 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 outer edge of the driving member 22 is between two adjacent threads of the internal thread.

[0045] 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 .

[0046] It is understood that the driving member 22 can be a plate-shaped structure or a block-shaped structure. Optionally, the driving member 22 is made of a metal material, such as aluminum, iron, steel, copper, etc.; or the driving member 22 is made of a non-metallic material, such as plastic, ceramic, or wood.

[0047] The adjusting member 23 includes an adjusting body 231 and a first limiting member 232. The first limiting member 232 is press-formed at the end of the adjusting body 231. The press-forming process may be press forming, extrusion forming, riveting forming, stamping forming, or the like.

[0048] The first limiting member 232 can be an annular limiting member or a C-shaped limiting member arranged along the circumference of the adjusting body 231; or, the first limiting member 232 includes a plurality of limiting portions (such as flange sections, protrusions, etc.) arranged at intervals along the circumference of the adjusting body 231.

[0049] It is understandable that the inner edge of the driving member 22 may be an annular structure or a C-shaped structure; or, the inner edge of the driving member 22 may also include a plurality of arc segments, which are arranged at intervals along the circumference of the adjusting member 23 .

[0050] The inner edge of the driving member 22 is located between the adjusting body 231 and the first limiting member 232; the end of the adjusting body 231 away from the first limiting member 232 is connected to the deforming portion 212. It can be understood that the inner edge of the driving member 22 is rotatably connected between the adjusting body 231 and the first limiting member 232, and the end of the adjusting body 231 away from the first limiting member 232 is fixedly connected (including but not limited to welding, bonding, riveting, threading, interference fit, etc.) or integrally connected to the deforming portion 212; or the inner edge of the driving member 22 is fixedly connected between the adjusting body 231 and the first limiting member 232, and the end of the adjusting body 231 away from the first limiting member 232 is rotatably connected to the deforming portion 212; or the inner edge of the driving member 22 is rotatably connected between the adjusting body 231 and the first limiting member 232, and the end of the adjusting body 231 away from the first limiting member 232 is rotatably connected to the deforming portion 212.

[0051] Among them, the inner edge of the driving member 22 is rotatably connected between the adjusting body 231 and the first limiting member 232, which means that the first limiting member 232 limits the inner edge of the driving member 22 on the adjusting body 231, 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.

[0052] Among them, the inner edge of the driving member 22 is fixedly connected between the adjusting body 231 and the first limiting member 232, which means that the first limiting member 232 presses the inner edge of the driving member 22 against the adjusting body 231, so that the driving member 22 can neither rotate around its own axis relative to the adjusting member 23 nor move in the depth direction of the cavity 10 relative to the adjusting member 23.

[0053] Among them, the end of the adjustment body 231 away from the first limit member 232 is fixedly connected or integrally connected to the deformation part 212, which means that the adjustment member 23 can neither rotate around its own axis relative to the deformation part 212 nor move relative to the deformation part 212 in the depth direction of the cavity 10.

[0054] The end of the adjusting body 231 away from the first limiting member 232 is rotatably connected to the deforming portion 212 , which means that the adjusting body 231 can rotate around its own axis relative to the deforming portion 212 , but cannot move relative to the deforming portion 212 in the depth direction of the cavity 10 .

[0055] The cover assembly 20 provided by the embodiment of the present application has the following beneficial effects: During assembly, the driver 22 is first placed on the adjustment body 231, and then the first stopper 232 is crimped (e.g., pressed, riveted, extruded, stamped, etc.) so that the inner edge of the driver 22 is located between the first stopper 232 and the adjustment body 231. That is, the first stopper 232 can limit or press the inner edge of the driver 22 against the adjustment body 231, thereby connecting the driver 22 to the adjustment body 23. Because the first stopper 232 is crimped and formed on the adjustment body 231, it will not loosen, solving the problem of screws easily loosening after long-term use.

[0056] Please refer to Figure 4 In some embodiments, the deforming portion 212 has a connecting groove 2121 with an opening toward the driving member 22, and an annular clamping groove 21211 is provided on the side wall of the connecting groove 2121; the end of the adjusting body 231 away from the first limiting member 232 is provided with a clamping portion 2311, and the clamping portion 2311 is clamped in the annular clamping groove 21211.

[0057] Optionally, a protrusion is provided on the deforming portion 212 , and the connecting groove 2121 is provided on the protrusion.

[0058] It can be understood that the annular groove 21211 can be set at the bottom of the groove side wall of the connecting groove 2121, or at the middle position of the groove side wall of the connecting groove 2121.

[0059] A clamping portion 2311 is provided at one end of the adjusting body 231 away from the first stopper 232. Specifically, the clamping portion 2311 is provided at the end of the adjusting body 231 that is closer to the deformable portion 212. The clamping portion 2311 may be integrally connected to the adjusting body 231, or may be fixedly connected (including but not limited to welding, bonding, riveting, threading, interference fit, etc.) to the adjusting body 231.

[0060] Optionally, a plurality of the clamping portions 2311 are arranged at intervals along the circumference of the adjustment body 231 . For example, the number of the clamping portions 2311 is two, three, or four or more.

[0061] During installation, the engaging portion 2311 is inserted into the connecting groove 2121 along the axial direction of the adjusting body 231, while simultaneously moving radially inward along the adjusting body 231. When the engaging portion 2311 is aligned with the annular engaging groove 21211, the engaging portion 2311 moves radially outward along the adjusting body 231 to engage within the annular engaging groove 21211, thereby achieving rotatable connection between the end of the adjusting body 231 away from the first stopper 232 and the deformable portion 212. A guiding slope is provided on the side of the engaging portion 2311 facing away from the driving member 22 to guide the engaging portion 2311 into the connecting groove 2121.

[0062] Based on the above solution, the adjusting member 23 and the deforming portion 212 can be connected by simply inserting the clamping portion 2311 of the adjusting body 231 into the connecting groove 2121 of the deforming portion 212, making the connection between the adjusting member 23 and the deforming portion 212 simpler and more convenient.

[0063] In other embodiments, the connecting groove 2121 can be set on the adjusting body 231, and the clamping portion 2311 can be set on the deformation portion 212, and the groove side wall of the connecting groove 2121 is provided with an annular clamping groove 21211, and the opening of the connecting groove 2121 is facing away from the driving member 22.

[0064] Please refer to Figure 5 In some embodiments, the deformation portion 212 has a connecting groove 2121 with an opening toward the driving member 22, and an annular clamping groove 21211 is provided on the side wall of the connecting groove 2121; the end of the adjusting body 231 away from the first limiting member 232 is provided with a matching portion 2312, and the matching portion 2312 is located in the connecting groove 2121; the cover assembly 20 also includes a retaining spring 25 located in the connecting groove 2121 and clamped in the annular clamping groove 21211, and the retaining portion 2312 is limited between the retaining spring 25 and the bottom wall of the connecting groove 2121.

[0065] Optionally, a protrusion is provided on the deforming portion 212 , and the connecting groove 2121 is provided on the protrusion.

[0066] It can be understood that the annular groove 21211 can be set at the top of the groove side wall of the connecting groove 2121, or at the middle position of the groove side wall of the connecting groove 2121.

[0067] A mating portion 2312 is provided at one end of the adjusting body 231 away from the first stopper 232. Specifically, the mating portion 2312 is provided at the end of the adjusting body 231 that is closer to the deformable portion 212. The mating portion 2312 may be integrally connected to the adjusting body 231, or may be fixedly connected (including but not limited to welding, bonding, riveting, threading, interference fit, etc.) to the adjusting body 231.

[0068] It can be understood that the fitting portion 2312 can be a ring-shaped structure or a C-shaped structure, or the fitting portion 2312 can also include a plurality of fitting segments, and the plurality of fitting segments are arranged at intervals along the circumference of the adjustment body 231 .

[0069] During installation, the matching portion 2312 is inserted into the connecting groove 2121 along the axial direction of the adjusting body 231. When the matching portion 2312 abuts against the bottom wall of the connecting groove 2121, the retaining spring 25 is clamped into the annular retaining groove 21211 to realize the rotatable connection between the end of the adjusting body 231 away from the first limiting member 232 and the deformation portion 212.

[0070] Based on the above scheme, after the matching part 2312 of the adjustment body 231 is inserted into the connecting groove 2121, it is only necessary to clamp the retaining spring 25 in the annular retaining groove 21211 to realize the connection between the adjustment member 23 and the deformation part 212, making the connection between the adjustment member 23 and the deformation part 212 relatively simple and convenient.

[0071] In other embodiments, a limit block is provided on the deformation portion 212, and the limit block has a step hole, and the step surface of the step hole faces away from the driving member 22; the adjusting member 23 passes through the step hole from the side of the deformation portion 212 facing away from the driving member 22, and the matching portion 2312 of the adjusting member 23 abuts on the step surface of the step hole, and at the same time, a groove is provided on the outer wall surface of the adjusting member 23, and the retaining spring 25 is placed in the groove from the side of the deformation portion 212 toward the driving member 22, and the retaining spring 25 abuts on the end face of the limit block facing the driving member 22, so that the adjusting member 23 is rotatably connected to the deformation portion 212.

[0072] In some embodiments, the deformation portion 212 includes a deformation body and a second limiting member press-formed on the deformation body.

[0073] Optionally, the second limiting member is a second limiting flange that is extruded from outside to inside on the deformable body along the radial direction of the adjusting member 23 .

[0074] 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 second limiting member is relatively large, which is conducive to increasing the structural strength of the second limiting member and can stably limit or press the matching part 2312 of the adjusting member 23; or, the second limiting flange can also include a plurality of flange segments arranged at intervals along the circumference of the adjusting member 23. Since the size of the flange segments is relatively small, it is conducive to extrusion molding.

[0075] Optionally, a plurality of flange segments are evenly spaced around the adjusting member 23 to ensure that the matching portion 2312 of the adjusting member 23 is evenly stressed.

[0076] Before molding, the second limiting member is in a vertical state, placing the matching portion 2312 of the adjusting member 23 on the deformed body; during molding, the molding tool squeezes the second limiting member from the outside to the inside; after molding, the second limiting member is in an inclined state to limit or press the matching portion 2312 of the adjusting member 23.

[0077] Please refer to Figure 3 In some embodiments, the first limiting member 232 is a first limiting flange extruded from the inside to the outside along the radial direction of the adjusting member 23.

[0078] 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 232 is relatively large, which is conducive to increasing the structural strength of the first limiting member 232 and can stably limit or press the inner edge of the driving member 22; or, the first limiting flange can also include a plurality of flange segments arranged at intervals along the circumference of the adjusting member 23. Since the size of the flange segments is relatively small, it is conducive to extrusion molding.

[0079] Optionally, a plurality of flange segments are evenly spaced around the adjusting member 23 to ensure that the inner edge of the driving member 22 is evenly stressed.

[0080] Before molding, the first limiting member 232 is in a vertical state, placing the driving member 22 on the adjusting body 231; during molding, the molding tool squeezes the first limiting member 232 from the inside to the outside; after molding, the first limiting member 232 is in an inclined state to limit or press the inner edge of the driving member 22.

[0081] In other embodiments, the first limiting member 232 is a limiting protrusion formed by riveting and / or stamping in the thickness direction of the cover plate 21 .

[0082] 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 first limiting member 232 is relatively large, which is conducive to increasing the structural strength of the first limiting member 232 and can stably limit or press the inner edge of the driving member 22; or, the limiting protrusion can also include a plurality of protrusions arranged at intervals along the circumference of the adjusting member 23. Since the size of the protrusions is relatively small, it is conducive to riveting or stamping.

[0083] Optionally, a plurality of protrusions are evenly spaced around the adjusting member 23 to ensure that the inner edge of the driving member 22 is evenly stressed.

[0084] 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.

[0085] 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.

[0086] In other embodiments, the first limiting member 232 may also be formed by other crimping methods.

[0087] Please refer to Figures 1 to 3In 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.

[0088] 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 .

[0089] It can be understood that the driving member 22 can be an elastic driving plate or a rigid driving plate.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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 .

[0094] 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.

[0095] It can be understood that the resonant element 30 can be a resonant disk, a resonant column, a resonant rod, etc.

[0096] 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.

[0097] 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: It includes a cover plate, a driving member and an adjusting member, the cover plate includes a fixing portion and a deformation portion connected to the fixing portion, the fixing portion and the deformation portion form a receiving groove, the driving member is an annular member, and the outer edge of the driving member is threadedly connected to the groove side wall of the receiving groove; the adjusting member includes an adjusting body and a first limiting member, the first limiting member is crimped onto the end portion of the adjusting body, and the inner edge of the driving member is between the adjusting body and the first limiting member; the end of the adjusting body away from the first limiting member is connected to the deformation portion.

2. The cover plate assembly according to claim 1, wherein: The inner edge of the driving member is rotatably connected between the adjusting body and the first limiting member, and one end of the adjusting body away from the first limiting member is fixedly connected or integrally connected to the deformation portion.

3. The cover plate assembly according to claim 1, wherein: The inner edge of the driving member is fixedly connected between the adjusting body and the first limiting member, and one end of the adjusting body away from the first limiting member is rotatably connected to the deformation portion.

4. The cover plate assembly according to claim 1, wherein: The inner edge of the driving member is rotatably connected between the adjusting body and the first limiting member, and one end of the adjusting body away from the first limiting member is rotatably connected to the deformation portion.

5. The cover plate assembly according to claim 3 or 4, wherein: The deformation portion has a connecting groove with an opening toward the driving member, and an annular clamping groove is provided on the groove side wall of the connecting groove; the adjusting body is provided with a clamping portion at one end away from the first limiting member, and the clamping portion is clamped in the annular clamping groove.

6. The cover plate assembly according to claim 3 or 4, wherein: The deformation portion has a connecting groove with an opening toward the driving member, and an annular clamping groove is provided on the side wall of the connecting groove; the end of the adjustment body away from the first limiting member is provided with a matching portion, and the matching portion is located in the connecting groove; the cover plate assembly also includes a retaining spring located in the connecting groove and clamped in the annular clamping groove, and the retaining portion is limited between the retaining spring and the bottom wall of the connecting groove.

7. The cover plate assembly according to any one of claims 1 to 4, wherein: The first limiting member is a first limiting flange that is extruded from inside to outside along the radial direction of the adjusting member.

8. The cover plate assembly according to any one of claims 1 to 4, wherein: The first limiting member is a limiting protrusion formed by riveting and / or stamping in the thickness direction of the cover plate.

9. The cover plate assembly according to any one of claims 1 to 4, characterized in that: 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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