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, the cover plate assembly comprises a cover plate, a supporting member and an adjusting member, the cover plate comprises a fixed part and a deformation part connected with the fixed part, and the fixed part and the deformation part define a containing groove; the fixing part comprises a fixing body and a first limiting piece formed on the fixing body in a compression joint mode, and the supporting piece is connected between the first limiting piece and the fixing body. The supporting piece is provided with a threaded hole, one end of the adjusting piece is in threaded connection with the threaded hole, and the other end of the adjusting piece is connected with the deformation part. When the cover plate assembly is assembled, the supporting piece is firstly placed on the fixing body, and then the first limiting piece is formed through compression joint, so that the supporting piece is connected between the first limiting piece and the fixing body, namely the supporting piece is connected to the fixing part; the fixing part is not provided with an assembling groove, and the supporting piece is not provided with an installing part, so that the structures of the fixing part and the supporting piece are simplified.

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 generally include a cavity and a cover assembly located at the cavity opening. Figure 1 As shown, the cover assembly 200 includes a cover 201, a support member 202 and an adjusting member 203. The cover 201 includes a fixing portion 2011 and a deforming portion 2012 connected to the fixing portion 2011. The support member 202 is connected to the fixing portion 2011. The support member 202 has a threaded hole 2021. The adjusting member 203 is threadedly connected to the threaded hole 2021, and the end of the adjusting member 203 close to the deforming portion 2012 is connected to the deforming portion 2012. By rotating the support member 202 to drive the adjusting member 203 to move along its axial direction, the deforming portion 2012 is deformed (that is, the deforming portion 2012 is close to or away from the resonant member in the cavity), thereby realizing the adjustment of the resonant frequency.

[0003] The fixing portion 2011 has a mounting groove 20111 and an assembly groove 20112 communicating with the mounting groove 20111. The outer wall surface of the support member 202 is provided with a mounting portion 2022. The mounting portion 2022 of the support member 202 is installed in the mounting groove 20111 via the assembly groove 20112, thereby connecting the support member 202 to the fixing portion 2011. Since the fixing portion has both the mounting groove and the assembly groove, and the support member is provided with the mounting portion, the structures of the fixing portion and the support member are relatively complex. Utility Model Content

[0004] In view of this, embodiments of the present application provide a cover plate assembly and a cavity filter to solve the problem of the relatively complex structures of the fixing portion and the supporting member.

[0005] The first aspect of the present application proposes a cover assembly, including a cover, a support 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 fixing portion includes a fixing body and a first limiting member crimped onto the fixing body, the supporting member is connected between the first limiting member and the fixing body; the supporting member has a threaded hole, one end of the adjusting member is threadedly connected to the threaded hole, and the other end of the adjusting member is connected to the deforming portion.

[0006] The cover assembly provided by the embodiments of the present application has the following advantages: During assembly, the support member is first placed on the fixed body, and then the first stopper is press-fitted (e.g., by pressing, riveting, extruding, stamping, etc.) to connect the support member between the first stopper and the fixed body, thereby connecting the support member to the fixed portion. Since the fixed portion lacks an assembly groove and the support member lacks a mounting portion, the structures of the fixed portion and support member are simplified, solving the problem of relatively complex structures of the fixed portion and support member.

[0007] In some embodiments, the support member is rotatably connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is fixedly connected to the deformation portion.

[0008] In some embodiments, the deformation portion includes a deformation body and a second limiting member crimped onto the deformation body, and one end of the adjustment member close to the deformation portion is fixedly connected between the second limiting member and the deformation body.

[0009] In some embodiments, the support member is rotatably connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is integrally connected to the deformation portion.

[0010] In some embodiments, the support member is fixedly connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is rotatably connected to the deformation portion.

[0011] In some embodiments, the deformation portion includes a deformation body and a second limiting member crimped onto the deformation body, and one end of the adjustment member close to the deformation portion is rotatably connected between the second limiting member and the deformation body.

[0012] In some embodiments, the first limiting member is a limiting flange extruded from outside to inside along the radial direction of the support member.

[0013] 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.

[0014] In some embodiments, the support member is provided with an operating hole for driving the support member to rotate.

[0015] 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.

[0016] 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.

[0017] 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

[0018] 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.

[0019] Figure 1 It is a structural diagram of a cover plate assembly in the prior art;

[0020] Figure 2 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0021] Figure 3 yes Figure 2 A cross-sectional view of the cavity filter taken along the AA direction is shown;

[0022] Figure 4 yes Figure 3 a cross-sectional view of the middle cover assembly;

[0023] Figure 5 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0024] Figure 6 yes Figure 5 A cross-sectional view of the cavity filter taken along the BB direction is shown;

[0025] Figure 7 yes Figure 6 a cross-sectional view of the middle cover assembly;

[0026] Figure 8 is a schematic structural diagram of a cavity filter provided in some embodiments of the present application;

[0027] Figure 9 yes Figure 8 A cross-sectional view of the cavity filter taken along the CC direction is shown;

[0028] Figure 10 yes Figure 9 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. Base; 12. Positioning boss;

[0032] 20. Cover plate assembly; 21. Cover plate; 211. Fixing portion; 2111. Fixing body; 2112. First stopper; 21121. Avoidance groove; 212. Deformation portion; 2121. Deformation body; 2122. Second stopper; 22. Support member; 221. Threaded hole; 222. Operating hole; 23. Adjustment member; 231. Fitting portion; 24. Accommodation slot;

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

[0034] 200, cover plate assembly;

[0035] 201, cover plate; 2011, fixing portion; 20111, mounting groove; 20112, assembly groove; 2012, deformation portion;

[0036] 202, support member; 2021, threaded hole; 2022, mounting portion;

[0037] 203. Adjustment parts. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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).

[0044] 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.

[0045] 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.

[0046] The embodiment of the first aspect of the present application provides a cover plate assembly for use on a cavity filter. Figures 2 to 4The cover assembly 20 includes a cover 21, a support 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 fixing portion 211 includes a fixing body 2111 and a first limiting member 2112 crimped onto the fixing body 2111. The support member 22 is connected between the first limiting member 2112 and the fixing body 2111; the support member 22 has a threaded hole 221, one end of the adjusting member 23 is threadedly connected to the threaded hole 221, and the other end of the adjusting member 23 is connected to the deforming portion 212.

[0047] The cover plate 21 is used to seal the opening of the cavity 10. Optionally, the shape of the cover plate 21 is adapted to the cavity 10. The cover plate 21 is made of metal material, for example, the metal material can be aluminum, iron, steel, copper, etc.

[0048] 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.

[0049] 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 move closer to or away from the resonator 30.

[0050] The fixing portion 211 and the deforming portion 212 form a receiving groove 24, and the opening of the receiving groove 24 is away from the resonator 30. It can be understood that the fixing portion 211 constitutes the side of the receiving groove 24 and the deforming portion 212 constitutes the bottom of the receiving groove 24; optionally, the receiving groove 24 is a circular groove.

[0051] The fixing portion 211 includes a fixing body 2111 and a first position-limiting member 2112 press-molded on the fixing body 2111. The press-molding method may be press molding, extrusion molding, riveting molding, stamping molding, or the like.

[0052] The supporting member 22 is connected between the first limiting member 2112 and the fixed body 2111 , and one end of the adjusting member 23 close to the deforming portion 212 is connected to the deforming portion 212 . It can be understood that the first limiting member 2112 can press the edge of the support member 22 against the fixed body 2111, so that the support member 22 can neither rotate about its own axis nor move in the depth direction of the cavity 10. In this case, the adjusting member 23 can rotate about its own axis relative to the deformable portion 212, but cannot move relative to the deformable portion 212 in the depth direction of the cavity 10, that is, the deformable portion 212 is deformed by rotating the adjusting member 23. Alternatively, the first limiting member 2112 does not press the edge of the support member 22, so that the support member 22 can rotate about its own axis relative to the fixed portion 211, but cannot move relative to the fixed portion 211 in the depth direction of the cavity 10. In this case, the end of the adjusting member 23 near the deformable portion 212 is fixedly connected to the deformable portion 212 (which can be, but is not limited to, welding, threaded connection, bonding, clamping, riveting, pressing, etc.) or integrally connected to the deformable portion 212, that is, the deformable portion 212 is deformed by rotating the supporting member 22. In this case, the depth direction of the cavity 10 is consistent with the thickness direction of the cover plate 21.

[0053] It can be understood that the support member 22 can be flat as a whole; or, the support member 22 can be recessed on one side toward the deformation portion 212 to form a groove, and the groove is directly opposite to the deformation portion 212. In this way, it can be ensured that there is sufficient deformation when the deformation portion 212 deforms upward, thereby increasing the tuning range. Moreover, in the thickness direction of the cover plate 21, the edge of the support member 22 can be brought as close to the deformation portion 212 as possible, thereby reducing the thickness of the cover plate 21.

[0054] Optionally, the support member 22 is made of a metal material, for example, the metal material may be aluminum, iron, steel, copper, etc. Alternatively, the support member 22 is made of a non-metallic material, for example, plastic, ceramic, wood, etc.

[0055] It can be understood that the first limiting member 2112 can be an annular limiting member or a C-shaped limiting member arranged around the support member 22; or, the first limiting member 2112 includes a plurality of limiting portions (such as flange sections, protrusions, etc.) arranged at intervals along the circumference of the support member 22.

[0056] It can be understood that the threaded hole 221 can have internal threads in the entire hole section, or can have internal threads in a part of the hole section.

[0057] The adjusting member 23 may be coaxially arranged with the resonating member 30 , or may be non-coaxially arranged with the resonating member 30 .

[0058] The adjusting member 23 is threadedly connected to the threaded hole 221 , that is, an outer wall surface of the adjusting member 23 is provided with an external thread; optionally, the adjusting member 23 can be a screw, a stud, a screw rod, a bolt, etc.

[0059] The cover assembly 20 provided by the embodiment of the present application has the following beneficial effects: During assembly, the support member 22 is first placed on the fixed body 2111, and then the first stopper 2112 is press-fitted (e.g., by pressing, riveting, extruding, stamping, etc.) to connect the support member 22 between the first stopper 2112 and the fixed body 2111, thereby connecting the support member 22 to the fixed portion 211. Since the fixed portion 211 lacks an assembly groove and the support member 22 lacks a mounting portion, the structures of the fixed portion 211 and the support member 22 are simplified, thus resolving the problem of relatively complex structures of the fixed portion 211 and the support member 22.

[0060] Please also refer to Figures 2 to 4 In some embodiments, the support member 22 is rotatably connected between the first limiting member 2112 and the fixed body 2111, and the end of the adjusting member 23 close to the deformable portion 212 is fixedly connected to the deformable portion 212. That is, the deformable portion 212 is deformed by rotating the support member 22.

[0061] The support member 22 is rotatably connected between the first limiting member 2112 and the fixed body 2111, that is, the first limiting member 2112 does not press the support member 22 onto the fixed body 2111 after crimping; it can be understood that a limiting groove is formed between the first limiting member 2112 and the fixed body 2111, and the support member 22 can rotate in the limiting groove. At the same time, in the depth direction of the cavity 10, the side of the support member 22 facing the deformation part 212 is limited by the fixed body 2111, and the side of the support member 22 away from the deformation part 212 is limited by the first limiting member 2112, so that the support member 22 cannot move relative to the fixed part 211 in the depth direction of the cavity 10.

[0062] One end of the adjusting member 23 close to the deforming portion 212 is fixedly connected to the deforming portion 212 . It can be understood that the adjusting member 23 can neither rotate around its own axis nor move relative to the deforming portion 212 in the depth direction of the cavity 10 .

[0063] Based on the above solution, the adjusting member 23 can adopt existing standard parts (such as screws, bolts, etc.), which greatly reduces the processing cost and manufacturing cost compared to the integrally formed adjusting member 23 and deformation portion 212.

[0064] Please refer to Figure 4 In some embodiments, the deformation portion 212 includes a deformation body 2121 and a second limiting member 2122 crimped onto the deformation body 2121 , and one end of the adjustment member 23 close to the deformation portion 212 is fixedly connected between the second limiting member 2122 and the deformation body 2121 .

[0065] The deformation portion 212 includes a deformation body 2121 and a second position-limiting member 2122 press-formed on the deformation body 2121. The press-forming may be press forming, extrusion forming, riveting forming, stamping forming, or the like.

[0066] One end of the adjusting member 23 close to the deformation portion 212 is fixedly connected between the second limiting member 2122 and the deformation body 2121, that is, the second limiting member 2122 presses the end of the adjusting member 23 onto the deformation body 2121 after crimping; it can be understood that a limiting groove is formed between the second limiting member 2122 and the deformation body 2121, and the end of the adjusting member 23 cannot rotate in the limiting groove, and at the same time, the adjusting member 23 cannot move relative to the deformation portion 212 in the depth direction of the cavity 10.

[0067] Optionally, the adjusting member 23 includes a fitting portion 231 , and after the second limiting member 2122 is crimped and formed, the fitting portion 231 is pressed tightly against the deformed body 2121 , so that the adjusting member 23 can neither rotate around its own axis nor move relative to the deformed portion 212 in the depth direction of the cavity 10 .

[0068] It can be understood that the second limiting member 2122 can be an annular limiting member or a C-shaped limiting member arranged around the matching portion 231. In this way, the second limiting member 2122 has a larger size, which is conducive to improving the structural strength of the second limiting member 2122, so that the matching portion 231 can be stably pressed against the deformed body 2121; or, the second limiting member 2122 includes a plurality of limiting portions (such as flange sections, protrusions, etc.) arranged at circumferential intervals along the matching portion 231.

[0069] Optionally, the adjusting member 23 may be a bolt, a screw, etc., and the fitting portion 231 is the head of the bolt or the screw.

[0070] In other embodiments, the end of the adjusting member 23 near the deformable portion 212 may be connected to the deformable portion 212 by welding, bonding, riveting, fastener connection, etc. When the end of the adjusting member 23 near the deformable portion 212 is connected to the deformable portion 212 by welding, the welding method may be laser welding, ultrasonic welding, etc. Optionally, the adjusting member 23 and the deformable portion 212 are made of the same material to facilitate welding of the adjusting member 23 to the deformable portion 212. For example, the adjusting member 23 and the deformable portion 212 are both made of aluminum.

[0071] Please also refer to Figures 5 to 7 In some embodiments, the support member 22 is rotatably connected between the first limiting member 2112 and the fixed body 2111 , and one end of the adjusting member 23 close to the deformation portion 212 is integrally connected to the deformation portion 212 .

[0072] The support member 22 is rotatably connected between the first limiting member 2112 and the fixed body 2111, that is, the first limiting member 2112 does not press the support member 22 onto the fixed body 2111 after crimping; it can be understood that a limiting groove is formed between the first limiting member 2112 and the fixed body 2111, and the support member 22 can rotate in the limiting groove. At the same time, in the depth direction of the cavity 10, the side of the support member 22 facing the deformation part 212 is limited by the fixed body 2111, and the side of the support member 22 away from the deformation part 212 is limited by the first limiting member 2112, so that the support member 22 cannot move relative to the fixed part 211 in the depth direction of the cavity 10.

[0073] One end of the adjusting member 23 close to the deforming portion 212 is integrally connected to the deforming portion 212 . It can be understood that the adjusting member 23 and the deforming portion 212 are integrally formed.

[0074] Based on the above technical solution, the adjusting member 23 and the deforming portion 212 are integrally formed, which reduces the number of parts and is beneficial to the assembly of the cover assembly 20 .

[0075] Please also refer to Figure 3 and Figure 4 In some embodiments, the support member 22 is fixedly connected between the first limiting member 2112 and the fixed body 2111 , and one end of the adjusting member 23 close to the deformation portion 212 is rotatably connected to the deformation portion 212 .

[0076] The support member 22 is fixedly connected between the first limiting member 2112 and the fixed body 2111, that is, the first limiting member 2112 presses the support member 22 onto the fixed body 2111 after crimping; it can be understood that a limiting groove is formed between the first limiting member 2112 and the fixed body 2111, and the support member 22 cannot rotate in the limiting groove. At the same time, the support member 22 cannot move relative to the fixed part 211 in the depth direction of the cavity 10.

[0077] One end of the adjusting member 23 close to the deforming portion 212 is rotatably connected to the deforming portion 212 . It can be understood that the adjusting member 23 can rotate around itself relative to the deforming portion 212 , but cannot move relative to the deforming portion 212 in the depth direction of the cavity 10 .

[0078] Among them, an operating part for driving the adjusting part 23 to rotate is provided on the adjusting part 23. It can be understood that the operating part can be a prism, such as a square prism, a hexagonal prism, etc.; or, the operating part can be a groove, such as a square groove, a hexagonal groove, etc.; or, the operating part can also be a plane milled on the adjusting part 23; or, the operating part can also be a blind hole or a through hole extending along its radial direction.

[0079] Please refer to Figure 4In some embodiments, the deformation portion 212 includes a deformation body 2121 and a second limiting member 2122 crimped onto the deformation body 2121 , and one end of the adjustment member 23 close to the deformation portion 212 is rotatably connected between the second limiting member 2122 and the deformation body 2121 .

[0080] The deformation portion 212 includes a deformation body 2121 and a second position-limiting member 2122 press-formed on the deformation body 2121. The press-forming may be press forming, extrusion forming, riveting forming, stamping forming, or the like.

[0081] One end of the adjusting member 23 near the deformable portion 212 is rotatably connected between the second limiting member 2122 and the deformable body 2121. That is, after crimping, the second limiting member 2122 does not press the end of the adjusting member 23 against the deformable body 2121. It can be understood that the second limiting member 2122 and the deformable body 2121 enclose a limiting groove, within which the end of the adjusting member 23 can rotate. At the same time, in the depth direction of the cavity 10, one side of the end of the adjusting member 23 near the deformable portion 212 is limited by the deformable body 2121, while the other side of the end of the adjusting member 23 near the deformable portion 212 is limited by the second limiting member 2122, so that the adjusting member 23 cannot move relative to the deformable portion 212 in the depth direction of the cavity 10.

[0082] Optionally, the adjusting member 23 includes a fitting portion 231 , and the second limiting member 2122 does not press the fitting portion 231 onto the deformable body 2121 after crimping, so that the adjusting member 23 can rotate around its own axis but cannot move relative to the deformable portion 212 in the depth direction of the cavity 10 .

[0083] It can be understood that the second limiting member 2122 can be an annular limiting member or a C-shaped limiting member arranged around the matching portion 231; or, the second limiting member 2122 includes a plurality of limiting portions (such as flange sections, protrusions, etc.) arranged at circumferential intervals along the matching portion 231.

[0084] Optionally, the adjusting member 23 may be a bolt, a screw, etc., and the fitting portion 231 is the head of the bolt or the screw.

[0085] Based on the above solution, the adjusting member 23 can rotate relative to the deforming portion 212 without providing a limiting structure or limiting parts such as a groove or a clamping ring on the deforming portion 212 or the adjusting member 23, thereby simplifying the structure of the deforming portion 212 or the adjusting member 23.

[0086] In other embodiments, a limit block is provided in the middle position of the deformation portion 212, and the limit block has a connecting groove with an opening toward the support member 22, and an annular groove is provided on the side wall of the connecting groove. The end of the adjusting member 23 close to the deformation portion 212 is inserted into the connecting groove, and then the retaining spring is placed into the connecting groove and snapped into the annular groove; in the depth direction of the cavity 10, one side of the matching portion 231 is limited by the retaining spring, and the other side of the matching portion 231 is limited by the bottom wall of the connecting groove, so that the adjusting member 23 can only rotate around its own axis.

[0087] In other embodiments, a limit block is provided in the middle position of the deformation portion 212, and the limit block has a step hole, and the step surface of the step hole faces away from the support member 22; the adjusting member 23 passes through the step hole from the side of the deformation portion 212 facing away from the support 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 a retaining spring is placed in the groove from the side of the deformation portion 212 toward the support member 22, and the retaining spring abuts on the end face of the limit block facing the support member 22, so that the adjusting member 23 can only rotate around its own axis.

[0088] Please refer to Figure 4 and Figure 7 In some embodiments, the first limiting member 2112 is a limiting flange extruded from outside to inside along the radial direction of the support member 22.

[0089] It can be understood that the limiting flange can be an annular limiting flange or a C-shaped limiting flange arranged around the support member 22. In this way, the size of the first limiting member 2112 is relatively large, which is conducive to increasing the structural strength of the first limiting member 2112 and can stably limit or press the support member 22; or, the limiting flange can also include a plurality of flange segments arranged at intervals along the circumference of the support member 22. Since the size of the flange segment is relatively small, it is conducive to extrusion molding.

[0090] Optionally, a plurality of flange segments are evenly spaced around the support member 22 to ensure that the support member 22 is evenly stressed.

[0091] Optionally, the fixed body 2111 has a relief groove 21121 outside the first limiting member 2112. Before molding, the first limiting member 2112 is in a vertical position, placing the support member 22 on the fixed body 2111. During molding, a molding tool is inserted into and squeezed inwardly into the relief groove 21121. After molding, the first limiting member 2112 is tilted to limit or compress the support member 22. In this case, the first limiting member 2112 does not protrude from the upper surface of the cover plate 21. Of course, the fixed body 2111 can also be provided with no relief groove 21121, in which case the first limiting member 2112 protrudes entirely from the upper surface of the cover plate 21.

[0092] Please also refer to Figures 8 to 10In some embodiments, the first limiting member 2112 is a limiting protrusion formed by riveting and / or stamping in the thickness direction of the cover plate 21.

[0093] It can be understood that the limiting protrusion can be an annular limiting protrusion or a C-shaped limiting protrusion arranged around the support member 22. In this way, the size of the first limiting member 2112 is relatively large, which is conducive to increasing the structural strength of the first limiting member 2112 and can stably limit or press the support member 22; or, the limiting protrusion can also include a plurality of protrusions arranged at intervals along the circumference of the support member 22. Since the size of the protrusions is relatively small, it is conducive to riveting or stamping.

[0094] Optionally, a plurality of protrusions are evenly spaced around the support member 22 to ensure that the support member 22 is evenly stressed.

[0095] When the limiting protrusion is an annular limiting protrusion or a C-shaped limiting protrusion arranged around the support member 22, 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 can be stamped.

[0096] When the limiting protrusion includes a plurality of convex points arranged at intervals along the circumference of the support member 22, all the convex points can be formed by riveting, all the convex points can be formed by stamping, or a part of the convex points can be formed by riveting and another part of the convex points can be formed by stamping.

[0097] In other embodiments, the first limiting member 2112 may also adopt other crimping methods.

[0098] Please refer to Figures 2 to 4 In some embodiments, the support member 22 is provided with an operating hole 222 for rotating the support member 22. A hand or an external tool is inserted into the operating hole 222 to drive the support member 22 to rotate.

[0099] 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 support member 22 .

[0100] It can be understood that in this embodiment, the support member 22 can be an elastic driving plate or a rigid driving plate.

[0101] By adopting the above technical solution, the operating hole 222 is used to facilitate driving the support member 22 to rotate. At the same time, providing the operating hole 222 on the support member 22 is also helpful to reduce the weight of the support member 22.

[0102] In other embodiments, the support member 22 may not have the operating hole 222, but instead may have an operating protrusion on the side of the support member 22 facing away from the deformable portion 212, so that a hand or an external tool can use the operating protrusion to drive the support member 22 to rotate. Of course, it is also possible to provide the operating protrusion on the side of the support member 22 facing away from the deformable portion 212 while providing the operating hole 222 on the support member 22. The operating protrusion may be integrally formed with the support member 22, or it may be fixed to the support member 22 by welding, bonding, threading, riveting, crimping, or the like.

[0103] The second aspect of the present application provides a cavity filter 100. Please also refer to Figure 2 and Figure 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 .

[0104] 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.

[0105] 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.

[0106] It can be understood that the resonant element 30 can be a resonant disk, a resonant column, a resonant rod, etc.

[0107] 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.

[0108] 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.

[0109] Optionally, the center hole 31 is a circular hole, and correspondingly, the positioning boss 12 is a circular boss.

[0110] 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.

[0111] 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 .

[0112] 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.

[0113] Please refer to Figure 3 In some embodiments, a base 11 is further provided at the bottom of the cavity 10 , and a positioning boss 12 is located on the base 11 .

[0114] In the radial direction of the resonator 30, the size of the base 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 base 11 in the depth direction of the cavity 10, and the lower end of the resonator 30 can be supported on the base 11.

[0115] It is understandable that the positioning boss 12 can be integrally formed with the base 11 , and the positioning boss 12 can also be fixed to the base 11 by welding, bonding, threaded connection, crimping, riveting, etc.

[0116] It can be understood that the base 11 can be integrally formed with the bottom wall of the cavity 10, that is, the positioning boss 12, the base 11 and the bottom wall of the cavity 10 can be integrally formed; or, the base 11 can also be fixed to the bottom wall of the cavity 10 by welding, bonding, threaded connection, crimping, riveting, etc.

[0117] 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 support 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 fixing portion includes a fixing body and a first limiting member crimped onto the fixing body, the supporting member is connected between the first limiting member and the fixing body; the supporting member has a threaded hole, one end of the adjusting member is threadedly connected to the threaded hole, and the other end of the adjusting member is connected to the deformation portion.

2. The cover plate assembly according to claim 1, wherein: The supporting member is rotatably connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is fixedly connected to the deformation portion.

3. The cover plate assembly according to claim 2, wherein: The deformation portion includes a deformation body and a second limiting member press-formed on the deformation body, and one end of the adjustment member close to the deformation portion is fixedly connected between the second limiting member and the deformation body.

4. The cover plate assembly according to claim 1, wherein: The supporting member is rotatably connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is integrally connected to the deformation portion.

5. The cover plate assembly according to claim 1, wherein: The supporting member is fixedly connected between the first limiting member and the fixed body, and one end of the adjusting member close to the deformation portion is rotatably connected to the deformation portion.

6. The cover plate assembly according to claim 5, wherein: The deformation portion includes a deformation body and a second limiting member press-formed on the deformation body, and one end of the adjustment member close to the deformation portion is rotatably connected between the second limiting member and the deformation body.

7. The cover plate assembly according to any one of claims 1 to 6, wherein: The first limiting member is a limiting flange extruded from outside to inside along the radial direction of the support member.

8. The cover plate assembly according to any one of claims 1 to 6, 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 2 to 4, wherein: The support member is provided with an operating hole for driving the support member to rotate.

10. A cavity filter, characterized in that: The invention comprises the cover plate assembly according to any one of claims 1 to 9.

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