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 groove side wall of the containing groove is provided with an internal thread, and the driving part is connected with the adjusting part; the outer edge of the driving part is in threaded connection with the groove side wall of the accommodating groove; the driving piece is provided with a threaded hole, the adjusting piece is in threaded connection in the threaded hole, and one end, close to the deformation part, of the adjusting piece is rotatably connected with the deformation part; wherein the thread pitch of the internal thread is the same as that of the threaded hole. In the assembling process, the adjusting piece is installed on the deformation part firstly, and then it is guaranteed that the adjusting piece is fixed relative to the deformation part through a hand or an external tool; due to the fact that the thread pitch of the internal thread is the same as that of the threaded hole, when the driving piece is screwed on the fixing part, the adjusting piece can also be connected into the threaded hole in a threaded mode, namely simultaneous connection of the driving piece, the fixing part and the adjusting piece is achieved, and the problem that the driving piece is low in assembling efficiency 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 plate assembly includes a cover plate, a driver, and an adjustment member. The cover plate includes a fixed portion and a deformable portion connected to the fixed portion, with the fixed portion and the deformable portion defining a receiving slot. The driver is welded to the fixed portion and has a threaded hole. The adjustment member is threaded into the threaded hole, and the end of the adjustment member closest to the deformable portion is rotatably connected to the deformable portion. Rotating the adjustment member causes the deformable portion to deform along the depth direction of the cavity, thereby adjusting the resonant frequency.

[0004] However, since the driving member is welded to the fixing portion and the adjusting member is threadedly connected to the threaded hole of the driving member, the driving member needs to be connected to the adjusting member and the fixing portion in sequence, resulting in low assembly efficiency. 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 of low assembly efficiency of driving components.

[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 groove side wall of the receiving groove is provided with an internal thread, the outer edge of the driving member is threadedly connected to the groove side wall of the receiving groove; the driving member has a threaded hole, the adjusting member is threaded in the threaded hole, and one end of the adjusting member close to the deforming portion is rotatably connected to the deforming portion; wherein the pitch of the internal thread is the same as the pitch of the threaded hole.

[0007] The beneficial effects of the cover assembly provided by the embodiment of the present application are as follows: during assembly, the adjusting part is first installed on the deforming part, and then the adjusting part is fixed relative to the deforming part by hand or external tools; since the pitch of the internal thread provided on the side wall of the accommodating groove is the same as the pitch of the threaded hole of the driving part, when the driving part is screwed on the fixed part, the adjusting part can also be threadedly connected in the threaded hole of the driving part, that is, the driving part is connected to the fixed part and the adjusting part at the same time, which solves the problem of low assembly efficiency of the driving part.

[0008] It should be noted that, since the outer diameter of the adjusting member is much smaller than the outer diameter of the driving member, the driving member will not rotate together when the adjusting member is rotated.

[0009] In some embodiments, the deformation portion includes a deformation body and a limiting member crimped onto the deformation body, and the adjusting member is provided with a fitting portion at one end close to the deformation portion, and the fitting portion is located between the deformation body and the limiting member.

[0010] In some embodiments, the limiting member is a limiting flange extruded from outside to inside along the radial direction of the adjusting member.

[0011] In some embodiments, the limiting flange is an annular limiting flange arranged around the circumference of the adjusting member;

[0012] Alternatively, the limiting flange is a C-shaped limiting flange arranged around the circumference of the adjusting member;

[0013] Alternatively, the limiting flange includes a plurality of flange segments arranged at intervals along the circumference of the adjusting member.

[0014] In some embodiments, the deformation portion has a connecting groove with an opening toward the driving member, and an annular retaining groove is provided on the side wall of the connecting groove; the adjusting member is provided with a matching portion at one end close to the deformation portion, and the matching 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 retaining groove, and the retaining portion is limited between the retaining spring and the bottom wall of the connecting groove.

[0015] In some embodiments, the deformation portion has a connecting groove opening toward the driving member, and an annular clamping groove is provided on the side wall of the connecting groove; the adjusting member is provided with a clamping portion at one end close to the deformation portion, and the clamping portion is clamped in the annular clamping groove.

[0016] In some embodiments, the adjusting member is an adjusting screw, and the fitting portion is the head of the adjusting screw.

[0017] In some embodiments, in the axial direction of the adjusting member, the internal thread extends from the notch of the receiving groove to a middle position of the receiving groove.

[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 cross-sectional view of a cover plate assembly provided in some other embodiments of the present application;

[0027] Figure 5 It is a cross-sectional view of a cover assembly provided in some further embodiments of the present application.

[0028] The meanings of the marks in the figure are:

[0029] 100, cavity filter;

[0030] 10. Cavity;

[0031] 20. Cover plate assembly; 21. Cover plate; 211. Fixing portion; 212. Deformation portion; 2121. Deformation body; 2122. Positioning member; 2123. Connecting groove; 21231. Annular retaining groove; 22. Driving member; 221. Threaded hole; 222. Operating hole; 23. Adjusting member; 231. Fitting portion; 232. Retaining portion; 24. Receiving groove; 241. Internal thread; 25. Retaining spring;

[0032] 30. Resonant component. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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).

[0039] 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.

[0040] 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.

[0041] The embodiment of the first aspect of the present application provides a cover plate assembly for a cavity filter. Figure 2 and Figure 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 side wall of the receiving groove 24 is provided with an internal thread 241. The outer edge of the driving member 22 is threadedly connected to the side wall of the receiving groove 24; the driving member 22 has a threaded hole 221, and the adjusting member 23 is threadedly connected in the threaded hole 221. One end of the adjusting member 23 close to the deforming portion 212 is rotatably connected to the deforming portion 212; wherein the pitch of the internal thread 241 is the same as the pitch of the threaded hole 221.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The driving member 22 has a threaded hole 221 , that is, the driving member 22 has a certain thickness. It can be understood that the threaded hole 221 can be threaded in the entire hole section or in a partial hole section.

[0047] Among them, an internal thread 241 is provided on the side wall of the accommodating groove 24, and 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 outer side wall of the driving member 22 is provided with an external thread that cooperates with the internal thread 241.

[0048] The internal thread 241 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] It is understood that the driving member 22 can be a flat or 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.

[0050] The adjusting member 23 is threadedly connected to the threaded hole 221 , that is, the outer wall surface of the adjusting member 23 is provided with threads; optionally, the adjusting member 23 can be a screw, a stud, a screw rod, a bolt, etc.

[0051] One end of the adjusting member 23 close to the deforming portion 212 is rotatably connected to the deforming portion 212 , which means that the adjusting member 23 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 .

[0052] The pitch of the internal thread 241 on the side wall of the receiving groove 24 is the same as the pitch of the threaded hole 221 of the driving member 22 to ensure that the driving member 22 can be threadedly connected to the side wall of the receiving groove 24 and the adjusting member 23 at the same time.

[0053] The beneficial effects of the cover assembly 20 provided by the embodiment of the present application are as follows: during assembly, the adjusting member 23 is first installed on the deforming portion 212, and then the adjusting member 23 is fixed relative to the deforming portion 212 by hand or external tools; since the pitch of the internal thread 241 provided on the side wall of the accommodating groove 24 is the same as the pitch of the threaded hole 221 of the driving member 22, when the driving member 22 is screwed on the fixing portion 211, the adjusting member 23 can also be threadedly connected to the threaded hole 221 of the driving member 22, that is, the driving member 22 is connected to the fixing portion 211 and the adjusting member 23 at the same time, thereby solving the problem of low assembly efficiency of the driving member 22.

[0054] After the driving member 22 is installed, the adjusting member 23 is still rotated to drive the deforming portion 212 to deform along the depth direction of the cavity 10 .

[0055] It should be noted that, since the outer diameter of the adjusting member 23 is much smaller than the outer diameter of the driving member 22 , the driving member 22 will not rotate together with the adjusting member 23 when it is rotated.

[0056] In some embodiments, an operating portion for driving the adjusting member 23 to rotate is provided at one end of the adjusting member 23 away from the deforming portion 212 , so as to facilitate driving the adjusting member 23 to rotate.

[0057] It can be understood that the operating part can be a prism, for example, a square prism, a pentagonal prism, a hexagonal prism, etc.; or, the operating part can be a groove, for example, a square groove, a pentagonal groove, a hexagonal groove, etc.; or, the operating part can also be a plurality of planes milled on the adjusting member 23, for example, two, three, four, etc., and the plurality of planes are arranged at intervals along the circumference of the adjusting member 23; or, the operating part can also be a blind hole or a through hole extending radially along the adjusting member 23.

[0058] Please refer to Figure 3 In some embodiments, the deformation portion 212 includes a deformation body 2121 and a limiting member 2122 crimped onto the deformation body 2121 , and the adjustment member 23 is provided with a mating portion 231 at one end close to the deformation portion 212 , and the mating portion 231 is located between the deformation body 2121 and the limiting member 2122 .

[0059] Among them, the crimping molding can be press molding, extrusion molding, riveting molding, stamping molding, etc. It can be understood that the limiting member 2122 and the deformable body 2121 are integrally formed.

[0060] Optionally, there is a gap between the fitting portion 231 and the deformable body 2121 and / or the limiting member 2122 to facilitate the rotation of the fitting portion 231 .

[0061] During assembly, the adjusting member 23 is first placed on the deformable body 2121, and then the stopper 2122 is crimped and formed so that the mating portion 231 is located between the stopper 2122 and the deformable body 2121. This ensures that the end of the adjusting member 23 closest to the deformable portion 212 is rotatably connected to the deformable portion 212. In this assembly method, the crimped stopper 2122 can limit the mating portion 231 in the depth direction of the cavity 10, preventing the adjusting member 23 from separating from the deformable portion 212.

[0062] In other embodiments, the limiting member 2122 may also be fixed to the deformable body 2121 by welding, bonding, fastener connection, riveting, clamping, etc.

[0063] Please refer to Figure 3 In some embodiments, the limiting member 2122 is a limiting flange extruded from the outside to the inside along the radial direction of the adjusting member 23.

[0064] Optionally, the limiting flange can be an annular limiting flange or a C-shaped limiting flange arranged around the circumference of the adjusting member 23. In this way, the size of the limiting member 2122 is relatively large, which is conducive to increasing the structural strength of the limiting member 2122 and can stably limit the matching part 231 of the adjusting member 23; or, the 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.

[0065] Optionally, a plurality of flange segments are evenly spaced around the adjusting member 23 to ensure that the matching portion 231 of the adjusting member 23 is evenly stressed.

[0066] Before molding, the 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 limiting member 2122 from the outside to the inside; after molding, the limiting member 2122 is in an inclined state to limit the matching portion 231 of the adjusting member 23.

[0067] In other embodiments, the limiting member 2122 may also be formed by other crimping methods.

[0068] Please refer to Figure 4 In some embodiments, the deformation portion 212 has a connecting groove 2123 with an opening toward the driving member 22, and an annular groove 21231 is provided on the side wall of the connecting groove 2123; the adjusting member 23 is provided with a matching portion 231 at one end close to the deformation portion 212, and the matching portion 231 is located in the connecting groove 2123; the cover assembly 20 also includes a retaining spring 25 located in the connecting groove 2123 and clamped in the annular groove 21231, and the retaining portion 231 is limited between the retaining spring 25 and the bottom wall of the connecting groove 2123.

[0069] Optionally, a protrusion is provided on the deformation portion 212 , and the connecting groove 2123 is provided on the protrusion.

[0070] It can be understood that the annular groove 21231 can be set at the top of the groove side wall of the connecting groove 2123, or at the middle position of the groove side wall of the connecting groove 2123.

[0071] The fitting portion 231 may be integrally connected to the adjusting member 23 , or may be fixedly connected (including but not limited to welding, bonding, riveting, threaded connection, interference connection, etc.) to the adjusting member 23 .

[0072] During installation, the fitting portion 231 is inserted into the connecting groove 2123 along the axial direction of the adjusting member 23. When the fitting portion 231 abuts against the bottom wall of the connecting groove 2123, the retaining spring 25 is clamped into the annular retaining groove 21231 to realize the rotatable connection between the end of the adjusting member 23 close to the deformation portion 212 and the deformation portion 212.

[0073] The distance between the retaining spring 25 and the bottom wall of the connecting groove 2123 can be consistent with the thickness of the mating portion 231. That is, in the depth direction of the cavity 10, the side of the mating portion 231 facing away from the driver 22 is limited by the retaining spring 25, while the side of the mating portion 231 facing the driver 22 is limited by the retaining spring 25. This prevents the adjusting member 23 from moving relative to the deformable portion 212 in the depth direction of the cavity 10, but allows it to rotate about its own axis relative to the deformable portion 212. The retaining spring 25 is C-shaped.

[0074] Based on the above scheme, after the matching portion 231 of the adjusting member 23 is inserted into the connecting groove 2123, it is only necessary to clamp the retaining spring 25 in the annular retaining groove 21231 to realize the rotatable connection between the adjusting member 23 and the deforming portion 212, making the connection between the adjusting member 23 and the deforming portion 212 relatively simple and convenient.

[0075] 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 231 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.

[0076] Please refer to Figure 5In some embodiments, the deformation portion 212 has a connecting groove 2123 with an opening toward the driving member 22, and an annular clamping groove 21231 is provided on the side wall of the connecting groove 2123; the adjusting member 23 is provided with a clamping portion 232 at one end close to the deformation portion 212, and the clamping portion 232 is clamped in the annular clamping groove 21231.

[0077] Optionally, a protrusion is provided on the deformation portion 212 , and the connecting groove 2123 is provided on the protrusion.

[0078] It can be understood that the annular groove 21231 can be set at the bottom of the groove side wall of the connecting groove 2123, or at the middle position of the groove side wall of the connecting groove 2123.

[0079] The clamping portion 232 can be integrally connected to the adjusting member 23 , and the clamping portion 232 can also be fixedly connected (including but not limited to welding, bonding, riveting, threaded connection, interference connection, etc.) to the adjusting member 23 .

[0080] Optionally, a plurality of the clamping portions 232 are arranged at intervals along the circumference of the adjusting member 23 . For example, the number of the clamping portions 232 is two, three, or four or more.

[0081] During installation, the engaging portion 232 is inserted into the connecting groove 2123 along the axial direction of the adjusting member 23, while simultaneously moving radially inward along the adjusting member 23. When the engaging portion 232 is aligned with the annular engaging groove 21231, the engaging portion 232 moves radially outward along the adjusting member 23 to engage within the annular engaging groove 21231, thereby achieving a rotatable connection between the end of the adjusting member 23 closest to the deformable portion 212 and the deformable portion 212. A guiding slope is provided on the side of the engaging portion 232 facing away from the driving member 22 to guide the engaging portion 232 into the connecting groove 2123.

[0082] Based on the above solution, the adjusting member 23 and the deforming portion 212 can be connected by simply inserting the clamping portion 232 of the adjusting member 23 into the connecting groove 2123 of the deforming portion 212, making the connection between the adjusting member 23 and the deforming portion 212 simpler and more convenient.

[0083] In other embodiments, the connecting groove 2123 can be set on the adjusting member 23, and the clamping portion 232 can be set on the deformation portion 212. The groove side wall of the connecting groove 2123 is provided with an annular clamping groove 21231, and the opening of the connecting groove 2123 is facing away from the driving member 22.

[0084] In some embodiments, the adjusting member 23 is an adjusting screw, and the mating portion 231 is the head of the adjusting screw. The adjusting screw is a standard part that is easily available and does not require additional processing, thereby reducing processing costs. Of course, the adjusting member 23 can also be an adjusting bolt, and the mating portion 231 is the head of the adjusting bolt.

[0085] Please refer to Figure 3 In some embodiments, in the axial direction of the adjusting member 23 , the internal thread 241 provided on the side wall of the accommodating groove 24 extends from the notch of the accommodating groove 24 to the middle position of the accommodating groove 24 .

[0086] Based on this, after the driving member 22 is screwed from the notch of the receiving groove 24 to the middle position of the receiving groove 24, the driving member 22 will not be able to be screwed further, so as to prevent the driving member 22 from being over-screwed and too close to the deformation portion 212, thereby affecting the deformation of the deformation portion 212.

[0087] 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.

[0088] The shape of the operation hole 222 is not limited in this application. For example, the shape of the operation hole 222 can be circular, elliptical, polygonal, etc.

[0089] 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 .

[0090] It can be understood that the driving member 22 can be an elastic driving plate or a rigid driving plate.

[0091] 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.

[0092] 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. The operating protrusion may be radially spaced apart from the adjusting member 23, or it may be sleeved on the adjusting member 23.

[0093] Optionally, there may be one or more operating protrusions.

[0094] It can be understood that the operating protrusion can be integrally formed with the driving member 22, or the operating protrusion can be fixed to the driving member 22 by welding, bonding, threading, riveting, pressing, etc.

[0095] The second aspect of the present application provides a cavity filter 100. Please also refer to Figures 1 to 3The 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 .

[0096] 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.

[0097] 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.

[0098] It can be understood that the resonant element 30 can be a resonant disk, a resonant column, a resonant rod, etc.

[0099] 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.

[0100] 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 groove side wall of the receiving groove is provided with an internal thread, and the outer edge of the driving member is threadedly connected to the groove side wall of the receiving groove; the driving member has a threaded hole, the adjusting member is threadedly connected in the threaded hole, and one end of the adjusting member close to the deformation portion is rotatably connected to the deformation portion; wherein the pitch of the internal thread is the same as the pitch of the threaded hole.

2. The cover plate assembly according to claim 1, wherein: The deformation part includes a deformation body and a limiting member press-formed on the deformation body. The adjustment member is provided with a matching part at one end close to the deformation part. The matching part is located between the deformation body and the limiting member.

3. The cover plate assembly according to claim 2, wherein: The limiting member is a limiting flange that is extruded from outside to inside along the radial direction of the adjusting member.

4. The cover plate assembly according to claim 3, wherein: The limiting flange is an annular limiting flange arranged around the circumference of the adjusting member; Alternatively, the limiting flange is a C-shaped limiting flange arranged around the circumference of the adjusting member; Alternatively, the limiting flange includes a plurality of flange segments arranged at intervals along the circumference of the adjusting member.

5. The cover plate assembly according to claim 1, 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 adjusting member is provided with a matching portion at one end close to the deformation 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.

6. The cover plate assembly according to claim 1, 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 member is provided with a clamping portion at one end close to the deformation portion, and the clamping portion is clamped in the annular clamping groove.

7. The cover plate assembly according to any one of claims 2 to 5, wherein: The adjusting member is an adjusting screw, and the matching portion is the head of the adjusting screw.

8. The cover plate assembly according to any one of claims 1 to 6, wherein: In the axial direction of the adjusting member, the internal thread extends from the notch of the accommodating groove to the middle position of the accommodating groove.

9. The cover plate assembly according to any one of claims 1 to 6, 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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