Filter

Abstract

The utility model is suitable for the technical field of radio frequency devices, and provides a filter which comprises a shell, a resonance rod, a first limiting piece, a screw rod and a nut. The shell comprises a first wall, and the first wall comprises a deformation part and a first connecting part connected to the periphery of the deformation part. The resonance rod is arranged in the shell and is opposite to the deformation part at an interval. The first limiting piece is arranged on the side, away from the resonance rod, of the deformation part and connected to the first connecting part. A first groove is formed in the side, close to the deformation part, of the first limiting piece, and a penetrating hole communicated with the first groove is formed in the first limiting piece. The screw rod can be movably arranged in the through hole in a penetrating mode in the axial direction and is connected to the deformation part. The nut is in threaded connection with the screw. When the nut and the screw rotate relatively, the screw is used for moving in the axial direction so as to drive the deformation part to deform. Therefore, the stroke of deformation of the deformation part towards the first limiting piece can be increased, namely, the deformation quantity of the deformation part is increased. Therefore, the adjustment amount of the frequency of the filter can be improved, and the performance index of the filter can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of radio frequency devices, and more specifically, relates to a filter. Background Art

[0002] In related art, a filter typically includes a cavity, a cover plate that covers the cavity, a spring element positioned outside the cover plate, a screw that passes through the spring element and connects to the deformable portion of the cover plate, and a nut threaded onto the screw element. By driving the screw and nut relative to each other, the screw element can be moved axially relative to the spring element, causing the deformable portion of the cover plate to deform under the screw element's influence, thereby adjusting the signal frequency.

[0003] However, the distance between the deformable portion of the cover plate and the elastic sheet is generally small. Due to the limitation of the distance between the deformable portion of the cover plate and the elastic sheet, the deformation of the deformable portion of the cover plate is small, which makes the frequency adjustment of the filter small, affecting the performance indicators of the filter. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a filter that can improve the technical problem of small adjustment amount of the filter in the related art.

[0005] An embodiment of the present application provides a filter, comprising:

[0006] The housing includes a first wall, wherein the first wall includes a deformable portion and a first connecting portion connected to an outer periphery of the deformable portion;

[0007] a resonant rod, disposed in the housing, spaced apart from and opposite to the deformable portion;

[0008] A first limiting member is provided on a side of the deformable portion away from the resonant rod and connected to the first connecting portion; the first limiting member is provided with a first groove on a side close to the deformable portion, and the first limiting member is provided with a through hole connected to the first groove;

[0009] a screw, movably disposed in the through hole along the axial direction and connected to the deformation portion;

[0010] The nut is threadedly connected to the screw; when the nut and the screw rotate relative to each other, the screw is used to move along the axial direction to drive the deformation part to deform.

[0011] In some embodiments, the first limiting member includes a protrusion and a second connecting portion; the second connecting portion is connected to the outer periphery of the protrusion and is connected to the first connecting portion; the protrusion is bent relative to the second connecting portion and is raised in a direction away from the deformation portion to form the first groove.

[0012] In some embodiments, the raised portion comprises:

[0013] Plane segment;

[0014] The curved section is connected between the outer periphery of the planar section and the second connecting portion, and is bent relative to the planar section and the second connecting portion, and is surrounded by the planar section to form the first groove; the curved section is gradually expanded from the planar section to the second connecting portion.

[0015] In some embodiments, the deformation portion includes a boss and a deformation section, the deformation section is connected between the outer periphery of the boss and the first connecting portion, the boss extends beyond the deformation section toward the first limit member, and part of the screw is inserted into the boss.

[0016] In some embodiments, in the radial direction of the screw, the minimum dimension of the first groove is larger than the dimension of the boss.

[0017] In some embodiments, the screw is limited on the deformation part along the circumferential direction, and one end of the screw for connecting with the deformation part is limited on the deformation part along the axial direction toward the first limiting member; the first limiting member is limited on the first connecting part along the axial direction toward the deformation part; the nut abuts against the side of the first limiting member away from the deformation part, and is configured to rotate relative to the first limiting member.

[0018] In some embodiments, the nut is fixedly connected to the first limiting member, and the screw is fixedly connected to the deformation portion; the first limiting member is limited on the first connecting portion along the axial direction and is rotationally connected to the first connecting portion and the screw.

[0019] In some embodiments, the deformation portion is formed with the first connecting portion on a side away from the resonant rod to form a second groove, the inner wall of the second groove is provided with a third groove, the third groove is extended along the circumference of the screw, and the circumference of the first limiting member is limited in the third groove along the axial direction.

[0020] In some embodiments, the first limiting member is fixedly connected to the first connecting portion, and the screw is fixedly connected to the deformable portion; the nut is limited on the first limiting member along the axial direction and is rotatably connected to the first limiting member;

[0021] Alternatively, the screw is fixedly connected to the deformation part; the filter also includes a second limit member, which is arranged on the side of the first limit member away from the deformation part and is fixedly connected to the first connection part; the nut is limited on the second limit member along the axial direction and is rotatably connected to the second limit member; the first limit member is fixedly connected to the first connection part, and the nut is configured to rotate relative to the first limit member, or the nut is fixedly connected to the first limit member, and the first limit member is rotatably connected to the first connection part and the screw.

[0022] In some embodiments, the first limiting member is fixedly connected to the first connecting portion, and the nut is fixedly connected to the first limiting member; the screw is limited on the deformation portion along the axial direction and is rotationally connected to the deformation portion and the first limiting member.

[0023] In the filter provided by the embodiments of the present application, a first groove is provided on the side of the first stopper proximate to the deformable portion. This increases the distance between the first stopper proximate to the deformable portion and the deformable portion. This increases the travel of the deformable portion toward the first stopper, i.e., the deformation of the deformable portion. This helps increase the frequency adjustment capability of the filter, thereby improving the filter's performance.

[0024] 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

[0025] 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 descriptions of the prior art. 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.

[0026] Figure 1 A three-dimensional schematic diagram of a filter provided in some embodiments of the present application;

[0027] Figure 2 for Figure 1 Sectional view along AA;

[0028] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0029] Figure 4 Cross-sectional views of filters provided in other embodiments of the present application;

[0030] Figure 5 for Figure 4 Enlarged view of point C in the middle.

[0031] Among them, the reference numerals in the figures are:

[0032] 10-shell; 11-cavity; 1101-resonance cavity; 12-cover; 1201-second groove; 1202-third groove; 1203-mounting groove; 12a-first wall; 121-deformation part; 1211-boss; 1212-deformation section; 122-first connecting part; 20-resonance rod; 30-first limiter; 301-first groove; 302-perforation; 31-raised part; 311-planar section; 312-bent section; 32-second connecting part; 40-screw; 50-nut; D1-first dimension; D2-second dimension; L-center axis; Y-axial direction; X-radial direction; Z-circumferential direction. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0036] In the description of this application, "a plurality of" means more than two, and unless otherwise specifically defined, "more than two" includes two. Accordingly, "a plurality of groups" means more than two groups, including two groups.

[0037] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0038] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the related objects are in an "or" relationship.

[0039] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0040] The following is a detailed description with reference to the accompanying drawings and embodiments:

[0041] Please also refer to Figures 1 to 3 , Figure 1 A three-dimensional structural diagram of a filter provided in some embodiments of the present application, Figure 2 for Figure 1 Cross-section view along AA, Figure 3 for Figure 2Enlarged view of point B in the figure. The filter provided in the embodiment of the present application includes a housing 10, a resonant rod 20, a first limiting member 30, a screw 40 and a nut 50. The housing 10 includes a first wall 12a, the first wall 12a includes a deformation portion 121 and a first connecting portion 122, and the first connecting portion 122 is connected to the outer periphery of the deformation portion 121. The resonant rod 20 is arranged in the housing 10, and the resonant rod 20 and the deformation portion 121 are spaced apart and arranged opposite to each other. The first limiting member 30 is arranged on a side of the deformation portion 121 away from the resonant rod 20 and is connected to the first connecting portion 122. The first limiting member 30 is provided with a first groove 301 on a side close to the deformation portion 121, and the first limiting member 30 is provided with a through-hole 302 connected to the first groove 301. The screw 40 is movably provided in the through-hole 302 along the axial direction Y and is connected to the deformation portion 121. The nut 50 is threadedly connected to the screw 40. When the nut 50 and the screw rod 40 rotate relative to each other, the screw rod 40 is used to move along the axial direction Y to drive the deformation portion 121 to deform.

[0042] It should be noted that the axial direction Y refers to the axial direction Y of the screw 40 , the circumferential direction Z refers to the circumferential direction of the screw 40 , and the radial direction X refers to the radial direction of the circle defined by the outer circumference of the screw 40 .

[0043] The screw 40 has a central axis L, and the central axis L of the screw 40 is parallel to the axial direction Y.

[0044] The nut 50 is threadedly connected to the screw 40, meaning that the nut 50 is sleeved around the outer circumference of the screw 40, and the internal threads of the nut 50 are threadedly connected to the external threads of the screw 40. Specifically, the nut 50 is disposed around the central axis L of the screw 40. For ease of description, the central axis L of the screw 40 is simply referred to as the central axis L in the various embodiments of this application.

[0045] The relative rotation of the nut 50 and the screw 40 means that the nut 50 and the screw 40 can rotate relative to each other around the central axis L. In some possible designs, the nut 50 can rotate relative to the screw 40 around the central axis L. In other possible designs, the screw 40 can rotate relative to the nut 50 around the central axis L.

[0046] The first wall 12a is a solid wall at one end of the housing 10 along the axial direction Y. It is understood that the first wall 12a is substantially perpendicular to the axial direction Y. The deformable portion 121 is the portion of the first wall 12a that is designed to deform, and the first connecting portion 122 is the portion of the first wall 12a that is designed to connect to the deformable portion 121. The first connecting portion 122 being connected to the outer periphery of the deformable portion 121 means that the first connecting portion 122 is disposed around the outer periphery of the deformable portion 121, which is around the central axis L, and is connected to the deformable portion 121.

[0047] The housing 10 may include a cavity 11 and a cover 12. Cavity 11 is a solid structure with an opening at one end, and a resonant cavity 1101 is provided within cavity 11. Cover 12 covers the opening of cavity 11, particularly resonant cavity 1101, to provide signal shielding, thereby minimizing signal leakage and enabling the filter to form a complete and effective filtering channel. Both cavity 11 and cover 12 are made of metal.

[0048] Among some possible designs, such as Figures 1 to 3 As shown, the first wall 12a can be a cover plate 12, which covers the opening at one end of the cavity 11 along the axial direction Y. Based on this, the first connecting portion 122 is connected to the cavity 11. The first connecting portion 122 can be fixed to the cavity 11 by bolts, screws, etc. Alternatively, in other possible designs, the first wall 12a can be a solid wall of the cavity 11, specifically, the solid wall at one end of the cavity 11 along the axial direction Y is the first wall 12a. Based on this, the first connecting portion 122 is connected to the other solid walls of the cavity 11. As an example, the first wall 12a and the other solid walls of the cavity 11 are integrally formed.

[0049] The resonant rod 20 is disposed within the housing 10, specifically within the resonant cavity 1101. The resonant rod 20 may be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made of another material. The resonant rod 20 may be a hollow resonant rod or a solid resonant rod. The resonant rod 20 may or may not have a resonant disk. The resonant disk may or may not have a flange. The resonant rod 20 may be a circular rod, a polygonal rod, a special-shaped rod, a sheet-like resonant rod, a sheet metal resonant rod, or a resonant rod 20 of another form.

[0050] The resonant rod 20 and the deformable portion 121 are spaced apart and arranged opposite to each other, which means that the resonant rod 20 and the deformable portion 121 are spaced apart and arranged opposite to each other along the axial direction Y. Based on this, the deformable portion 121 and the resonant rod 20 form a coupling capacitor.

[0051] The first stopper 30 is disposed on a side of the deformable portion 121 away from the resonant rod 20 along the axial direction Y. The first groove 301 is disposed on a side of the first stopper 30 close to the deformable portion 121 along the axial direction Y. The through hole 302 passes through the first stopper 30 along the axial direction Y, so that the through hole 302 is connected to the first groove 301.

[0052] The screw rod 40 is passed through the through hole 302 , so that the through hole 302 can limit the screw rod 40 in the radial direction X, thereby allowing the screw rod 40 to stably move in the axial direction Y relative to the first limiting member 30 .

[0053] Based on this, when adjusting the frequency, the nut 50 and the screw 40 can be driven to rotate relative to each other, so that under the driving action of the relative rotation between the nut 50 and the screw 40, the screw 40 moves relative to the through-hole 302 along the axial direction Y, thereby driving the deformation portion 121 to deform. In this way, the distance between the deformation portion 121 and the resonant rod 20 can be adjusted, thereby adjusting the capacitive coupling value formed between the deformation portion 121 and the resonant rod 20, thereby achieving adjustment of the resonant frequency.

[0054] The first position-limiting member 30 may be recessed on one side of the first position-limiting member 30 close to the deformation portion 121 along the axial direction Y, thereby forming a first groove 301. Figure 2 and Figure 3 As shown, the first limiting member 30 may also be bent as a whole, so that the first limiting member 30 is bent at a side close to the deformation portion 121 to form a first groove 301 .

[0055] In the filter provided in the embodiment of the present application, the first groove 301 is provided on the side of the first stopper 30 near the deformable portion 121. This increases the distance between the first stopper 30 near the deformable portion 121 and the deformable portion 121. This increases the travel of the deformable portion 121 toward the first stopper 30, that is, increases the deformation of the deformable portion 121. This helps increase the frequency adjustment capability of the filter, thereby improving the filter's performance.

[0056] In addition, in the related art, the thickness of the cover plate 12 along the axial direction Y can generally be increased to increase the distance between the first limiter 30 and the deformation portion 121, thereby increasing the adjustment amount of the filter. However, such an arrangement makes the thickness of the cover plate 12 relatively large, which easily increases the volume and mass of the filter, and is not conducive to the lightweight design of the filter. In the filter provided in the embodiment of the present application, the first limiter 30 is designed so that the first limiter 30 is provided with a first groove 301 on the side close to the deformation portion 121, thereby increasing the distance between the deformation portion 121 and the first limiter 30, without additionally increasing the thickness of the first wall 12a along the axial direction Y, which is beneficial to increasing the adjustment amount of the filter while being able to ensure the lightweight design of the filter to a certain extent, thereby improving the performance indicators of the filter.

[0057] In some embodiments, please refer to Figure 2 and Figure 3 The deformation portion 121 has a mounting groove 1203 on one side thereof close to the first position-limiting member 30 . A portion of the screw rod 40 is passed through the mounting groove 1203 to connect to the deformation portion 121 .

[0058] The mounting groove 1203 can penetrate the deformation portion 121 along the axial direction Y, so that the screw 40 can extend to the side of the deformation portion 121 away from the first limiting member 30. Figure 2 and Figure 3 As shown, the installation groove 1203 may not pass through the deformation portion 121 along the axial direction Y, so that the screw rod 40 does not extend to the side of the deformation portion 121 away from the first limiting member 30.

[0059] In some embodiments, please refer to Figure 2 and Figure 3 , and in conjunction with other figures. The first limiting member 30 includes a raised portion 31 and a second connecting portion 32. The second connecting portion 32 is connected to the outer periphery of the raised portion 31 and to the first connecting portion 122. The raised portion 31 is bent relative to the second connecting portion 32 and protrudes away from the deformable portion 121 to form a first groove 301.

[0060] Specifically, the second connection portion 32 is connected to the outer periphery of the protrusion 31 surrounding the central axis L, and is connected to the protrusion 31 .

[0061] Specifically, the protrusion 31 is provided to protrude along the axial direction Y in a direction away from the deformation portion 121 , so that the protrusion 31 forms a first groove 301 on a side close to the deformation portion 121 .

[0062] By adopting the above technical solution, the raised portion 31 is arranged to be raised to enclose and form the first groove 301. This increases the distance between the deformable portion 121 and the first stopper 30 without increasing the thickness of the first stopper 30, thereby facilitating a lightweight design of the filter. Furthermore, the second connecting portion 32 is connected to the first connecting portion 122, and the raised portion 31 is bent relative to the second connecting portion 32. This facilitates the second connecting portion 32 to fit closely to the first connecting portion 122, thereby achieving a secure and stable connection between the first stopper 30 and the first connecting portion 122.

[0063] In other embodiments, the first limiting member 30 may be bent as a whole, so that the first limiting member 30 is substantially in an arc-shaped structure.

[0064] In some embodiments, please refer to Figure 2 and Figure 3 , and in conjunction with other drawings. The raised portion 31 includes a planar section 311 and a curved section 312. The curved section 312 is connected between the periphery of the planar section 311 and the second connecting portion 32, and is bent relative to the planar section 311 and the second connecting portion 32. Together with the planar section 311, it forms a first groove 301. The curved section 312 gradually expands from the planar section 311 toward the second connecting portion 32.

[0065] The planar section 311 is substantially planar, and the curved section 312 is curved.

[0066] Specifically, the curved section 312 is connected between the outer periphery of the planar section 311 and the second connecting portion 32. This means that the curved section 312 is provided on the outer periphery of the planar section 311 around the central axis L and is connected to the planar section 311. Furthermore, the second connecting portion 32 is provided on the outer periphery of the curved section 312 around the central axis L and is connected to the curved section 312. It can be understood that the planar section 311, the curved section 312, and the second connecting portion 32 are sequentially distributed along the radial direction X and are connected.

[0067] The bent section 312 is bent relative to the second connection portion 32 to facilitate the second connection portion 32 to fit against the first connection portion 122 , thereby achieving a secure and stable connection between the first limiting member 30 and the first connection portion 122 .

[0068] The curved section 312 is bent relative to the flat section 311 , so that the curved section 312 and the flat section 311 can surround and form the first groove 301 .

[0069] The curved section 312 gradually expands from the planar section 311 toward the second connecting portion 32. This means that the radial dimension of the curved section 312 gradually increases as the planar section 311 points toward the second connecting portion 32 along the axial direction Y. This also means that the radial dimension of the first groove 301 gradually increases. Therefore, the radial dimension of the first groove 301 at the junction of the curved section 312 and the planar section 311 is the minimum dimension of the first groove 301, i.e., the first dimension D1. In other words, the radial dimension of the planar section 311 is the minimum dimension of the first groove 301.

[0070] The provision of the flat section 311 increases the minimum dimension of the first groove 301. This facilitates the deformation of the deformable portion 121 as it deforms toward the first stopper 30, thereby increasing the deformation of the deformable portion 121 and thereby increasing the filter's adjustment capability, thereby improving the filter's performance.

[0071] In some embodiments, please refer to Figure 2 and Figure 3 , and in conjunction with other figures. The deformable portion 121 includes a boss 1211 and a deformable section 1212. The deformable section 1212 is connected between the outer periphery of the boss 1211 and the first connecting portion 122. The boss 1211 extends beyond the deformable section 1212 toward the first stopper 30, and a portion of the screw 40 is disposed within the boss 1211.

[0072] The deformation section 1212 is connected between the outer periphery of the boss 1211 and the first connecting portion 122. This means that the deformation section 1212 is provided on the outer periphery of the boss 1211 around the central axis L and is connected to the boss 1211. Furthermore, the first connecting portion 122 is provided on the outer periphery of the deformation section 1212 around the central axis L and is connected to the deformation section 1212. It can be understood that the boss 1211, the deformation section 1212, and the first connecting portion 122 are sequentially distributed along the radial direction X and are connected.

[0073] The boss 1211 extends beyond the deformation section 1212 toward the first limiting member 30 , which means that in the axial direction Y, the end of the boss 1211 away from the resonant rod 20 extends beyond the deformation section 1212 toward the first limiting member 30 .

[0074] Part of the screw 40 is inserted into the boss 1211 so that the boss 1211 is used to install the screw 40. Specifically, the boss 1211 can be provided with the above-mentioned mounting groove 1203, and part of the screw 40 is located in the mounting groove 1203 to achieve the connection between the boss 1211 and the screw 40.

[0075] The boss 1211 extends beyond the deformation section 1212 toward the first limiting member 30 , so that the boss 1211 has a larger size in the axial direction Y, which helps to improve the connection reliability and stability between the deformation portion 121 and the screw rod 40 .

[0076] In some embodiments, please refer to Figure 2 and Figure 3 In the radial direction X of the screw 40 , the minimum dimension of the first groove 301 is greater than the dimension of the boss 1211 .

[0077] In the radial direction X of the screw 40 , the minimum dimension of the first groove 301 is the first dimension D1 . Specifically, the minimum dimension of the first groove 301 is the radial dimension of the plane segment 311 .

[0078] In the radial direction X of the screw 40 , the size of the boss 1211 is a second size D2 .

[0079] By adopting the above technical solution, when the deformation part 121 is deformed toward the first limit member 30, the boss 1211 can enter the first groove 301, which can increase the deformation amount of the deformation part 121 to increase the adjustment amount of the filter, thereby helping to improve the performance indicators of the filter.

[0080] In some embodiments, please refer to Figure 2 and Figure 3, and in conjunction with other figures. The screw 40 is constrained on the deformable portion 121 along the circumferential direction Z and is constrained on the deformable portion 121 toward the first stopper 30 along the axial direction Y. The first stopper 30 is constrained on the first connecting portion 122 toward the deformable portion 121 along the axial direction Y. The nut 50 abuts against the side of the first stopper 30 away from the deformable portion 121 and is configured to rotate relative to the first stopper 30.

[0081] The nut 50 abuts against a side of the first limiting member 30 away from the deforming portion 121, so that the nut 50 is limited on the first limiting member 30 toward the deforming portion 121 along the axial direction Y. The first limiting member 30 is limited on the first connecting portion 122 toward the deforming portion 121 along the axial direction Y, so that the first limiting member 30 can abut against the first connecting portion 122 toward the deforming portion 121 along the axial direction Y. In this way, during the process of the nut 50 rotating relative to the screw rod 40 about the central axis L, under the limiting action of the first limiting member 30, the nut 50 can drive the screw rod 40 to move along the axial direction Y away from the resonant rod 20.

[0082] The first position-limiting member 30 may be limited on the first connecting portion 122 along the circumferential direction Z, or may be configured to be rotatable relative to the first connecting portion 122. As an example, the first position-limiting member 30 and the first connecting portion 122 are fixedly connected. The first position-limiting member 30 may be fixedly connected to the first connecting portion 122 by welding, bolting, riveting, or the like.

[0083] The screw 40 is constrained on the deformable portion 121 along the circumferential direction Z so that the screw 40 and the deformable portion 121 do not rotate relative to each other about the central axis L. Thus, while the nut 50 rotates relative to the screw 40 about the central axis L, the screw 40 does not rotate relative to the deformable portion 121, thereby facilitating movement of the screw 40 along the axial direction Y under the drive of the nut 50.

[0084] The screw rod 40 is limited on the deformable portion 121 toward the first limiting member 30 along the axial direction Y, so that the end of the screw rod 40 connected to the deformable portion 121 can abut the deformable portion 121 toward the first limiting member 30 along the axial direction Y. In this way, as the nut 50 rotates relative to the screw rod 40 about the central axis L, the screw rod 40 can be driven by the nut 50 to move away from the resonant rod 20 along the axial direction Y, thereby causing the deformable portion 121 to deform toward the first limiting member 30. Specifically, the end of the screw rod 40 connected to the deformable portion 121 can abut against the inner wall of the mounting groove 1203 toward the first limiting member 30 along the axial direction Y. When the mounting groove 1203 penetrates the deformable portion 121 along the axial direction Y, the end of the screw rod 40 connected to the deformable portion 121 can also abut against the side of the deformable portion 121 away from the first limiting member 30 along the axial direction Y.

[0085] As an example, the screw rod 40 is fixedly connected to the deformation portion 121. The screw rod 40 can be fixedly connected to the deformation portion 121 by welding, bolting, riveting, interference fitting, etc.

[0086] By adopting the above-mentioned technical solution, when the nut 50 rotates around the central axis L relative to the screw 40, under the limiting action of the first limit member 30 along the axial direction Y, the nut 50 can drive the screw 40 to move along the axial direction Y away from the resonance rod 20, so that the deformation part 121 is deformed toward the first limit member 30 under the drive of the screw 40, thereby adjusting the capacitive coupling value between the deformation part 121 and the resonance rod 20 to achieve a frequency modulation effect.

[0087] Based on the setting of the first groove 301, the deformation distance of the deformation portion 121 toward the first limiter 30 is increased, thereby increasing the deformation amount of the deformation portion 121, thereby helping to increase the adjustment amount of the filter and improve the performance indicators of the filter.

[0088] In some embodiments, please refer to Figure 4 and Figure 5 , and combined with other drawings. Among them, Figure 4 Cross-sectional views of filters provided in other embodiments of the present application, Figure 5 for Figure 4 Enlarged view of point C in the middle. The nut 50 is fixedly connected to the first stopper 30, and the screw 40 is fixedly connected to the deformation portion 121. The first stopper 30 is limited on the first connection portion 122 along the axial direction Y and is rotationally connected to the first connection portion 122 and the screw 40.

[0089] The nut 50 can be fixedly connected to the first position-limiting member 30 by welding, bolting, riveting, interference fit, etc. The nut 50 can be inserted into the through-hole 302 or located on a side of the first position-limiting member 30 away from the deformation portion 121 .

[0090] The screw rod 40 can be fixedly connected to the deformation portion 121 by welding, bolting, riveting, interference fitting, etc.

[0091] The first limiting member 30 is limited on the first connection portion 122 along the axial direction Y, which means that the first limiting member 30 is limited on the first connection portion 122 along the axial direction Y toward the deformation portion 121 and is limited on the first connection portion 122 along the axial direction Y away from the deformation portion 121.

[0092] The first limiting member 30 is rotatably connected to the first connection portion 122 and the screw 40 , such that the first limiting member 30 can rotate around the central axis L relative to the first connection portion 122 and the screw 40 .

[0093] By adopting the above technical solution, the nut 50 can be driven to rotate forwardly about the center axis L relative to the screw 40, so that the nut 50 and the first limiter 30 can rotate forwardly about the center axis L relative to the screw 40 and the first connecting portion 122. In this way, under the driving action of the nut 50, the screw 40 can move along the axial direction Y away from the resonant rod 20, thereby driving the deformation portion 121 to deform toward the first limiter 30, thereby achieving a tuning effect. The nut 50 can also be driven to rotate backwardly about the center axis L relative to the screw 40, so that the nut 50 and the first limiter 30 can rotate backwardly about the center axis L relative to the screw 40 and the first connecting portion 122. In this way, under the driving action of the nut 50, the screw 40 can move along the axial direction Y toward the resonant rod 20, thereby driving the deformation portion 121 to deform toward the resonant rod 20, thereby achieving a tuning effect. The rotation directions of the forward rotation and the reverse rotation are opposite.

[0094] Such arrangement enables the deformation portion 121 to deform toward or away from the resonance rod 20 under the drive of the screw rod 40 when the drive nut 50 rotates, thereby achieving a tuning effect.

[0095] In some embodiments, please refer to Figure 4 and Figure 5 , and in conjunction with other drawings. The side of the deformable portion 121 away from the resonant rod 20 and the first connecting portion 122 form a second groove 1201. The inner circumferential wall of the second groove 1201 is provided with a third groove 1202. The third groove 1202 extends along the circumferential direction Z of the screw 40, and the circumference of the first limiting member 30 is limited in the axial direction Y within the third groove 1202.

[0096] The second groove 1201 is provided on a side of the deformable portion 121 away from the resonant rod 20 along the axial direction Y, so that under the provision of the second groove 1201 , the first limiting member 30 can be spaced apart from the deformable portion 121 .

[0097] The third groove 1202 extends along the circumferential direction Z and surrounds the central axis L.

[0098] The periphery of the first limiting member 30 may be disposed on the second connecting portion 32 of the first limiting member 30 .

[0099] The periphery of the first limiting member 30 is limited in the third groove 1202 along the axial direction Y, so that the first limiting member 30 is limited on the first connecting portion 122 along the axial direction Y.

[0100] Furthermore, the first limiting member 30 can rotate around the central axis L relative to the first connection portion 122 , so that the first limiting member 30 can rotate relative to the third groove 1202 .

[0101] By adopting the above technical solution, the first limiting member 30 can be limited on the first connecting portion 122 along the axial direction Y and rotatably connected to the first connecting portion 122 .

[0102] Furthermore, the provision of the third groove 1202 allows the first position-limiting member 30 to be provided as a spring sheet. By squeezing the spring sheet, the periphery of the spring sheet can be inserted into the third groove 1202, thereby achieving installation of the first position-limiting member 30 on the first connecting portion 122. This facilitates installation of the first position-limiting member 30.

[0103] In some embodiments, please refer to Figure 4 and Figure 5 , and in combination with other drawings. The periphery of the first limiting member 30 is limited in the third groove 1202 along the radial direction X. Such a configuration can achieve a stable installation of the first limiting member 30 on the first wall 12a.

[0104] In some embodiments, the first limiting member 30 is fixedly connected to the first connection portion 122, and the screw 40 is fixedly connected to the deformation portion 121. The nut 50 is limited on the first limiting member 30 along the axial direction Y and is rotatably connected to the first limiting member 30.

[0105] The first position-limiting member 30 can be fixedly connected to the first connection portion 122 by welding, bolting, riveting, interference fitting, etc. The screw rod 40 can be fixedly connected to the deformation portion 121 by welding, bolting, riveting, interference fitting, etc.

[0106] The nut 50 is limited on the first limiting member 30 along the axial direction Y, which means that the nut 50 is limited on the first limiting member 30 toward the deformable portion 121 along the axial direction Y, and is limited on the first limiting member 30 away from the deformable portion 121 along the axial direction Y. The nut 50 can be inserted into the through-hole 302 or located on the side of the first limiting member 30 away from the deformable portion 121.

[0107] The nut 50 may be provided with a fourth groove, which is arranged around the central axis L. The first limiting member 30 is inserted into the fourth groove to be limited in the fourth groove along the axial direction Y.

[0108] The nut 50 is rotatably connected to the first limiting member 30 , such that the nut 50 can rotate around the central axis L relative to the first limiting member 30 .

[0109] By adopting the above technical solution, the nut 50 can be driven to rotate in the positive direction relative to the screw rod 40 about the central axis L, so that the nut 50 rotates in the positive direction relative to the first limiter 30 and the screw rod 40 about the central axis L. In this way, under the driving action of the nut 50 and the axial Y limiting action of the first limiter 30, the screw rod 40 can move in the axial direction Y away from the resonant rod 20, thereby driving the deformation portion 121 to deform toward the first limiter 30, thereby achieving a tuning effect. The nut 50 can also be driven to rotate in the opposite direction relative to the screw rod 40 about the central axis L, so that the nut 50 rotates in the opposite direction relative to the first limiter 30 and the screw rod 40 about the central axis L. In this way, under the driving action of the nut 50 and the axial Y limiting action of the first limiter 30, the screw rod 40 can move in the axial direction Y toward the resonant rod 20, thereby driving the deformation portion 121 to deform toward the resonant rod 20, thereby achieving a tuning effect.

[0110] Such arrangement enables the deformation portion 121 to deform toward or away from the resonance rod 20 under the drive of the screw rod 40 when the drive nut 50 rotates, thereby achieving a tuning effect.

[0111] In some embodiments, the screw 40 is fixedly connected to the deformable portion 121. The filter further includes a second stopper, which is disposed on a side of the first stopper 30 away from the deformable portion 121 and is fixedly connected to the first connecting portion 122. The nut 50 is constrained on the second stopper along the axial direction Y and is rotationally connected to the second stopper.

[0112] The screw rod 40 can be fixedly connected to the deformation portion 121 by welding, bolting, riveting, interference fitting, etc.

[0113] The second limiting member refers to a component used to limit the nut 50 in the axial direction Y. The second limiting member can be fixedly connected to the first connecting portion 122 by welding, bolting, riveting, interference fit, etc.

[0114] The nut 50 is limited on the second limiting member along the axial direction Y, which means that the nut 50 is limited on the second limiting member along the axial direction Y toward the deformation portion 121 and is limited on the second limiting member along the axial direction Y away from the resonance rod 20.

[0115] The nut 50 is rotatably connected to the second limiting member so that the nut 50 can rotate around the central axis L relative to the second limiting member.

[0116] By adopting the above technical solution, the nut 50 can be driven to rotate in the positive direction around the central axis L relative to the screw 40. In this way, under the driving action of the nut 50 and the axial Y limiting action of the second limiting member, the screw 40 can move in the axial direction Y away from the resonant rod 20, thereby driving the deformation portion 121 to deform toward the first limiting member 30, thereby achieving a tuning effect. The nut 50 can also be driven to rotate in the opposite direction around the central axis L relative to the screw 40. In this way, under the driving action of the nut 50 and the axial Y limiting action of the second limiting member, the screw 40 can move in the axial direction Y toward the resonant rod 20, thereby driving the deformation portion 121 to deform toward the resonant rod 20, thereby achieving a tuning effect. This arrangement allows the deformation portion 121 to deform toward or away from the resonant rod 20 under the drive of the screw 40 when the nut 50 is driven to rotate, thereby achieving a tuning effect.

[0117] Based on this, in some possible designs, the first limiting member 30 is fixedly connected to the first connecting portion 122 , and the nut 50 is configured to rotate relative to the first limiting member 30 .

[0118] The first position-limiting member 30 may be fixedly connected to the first connection portion 122 by welding, bolting, riveting, interference fit, or the like.

[0119] The nut 50 is configured to rotate relative to the first limiting member 30 , which means that the nut 50 can rotate around the central axis L relative to the first limiting member 30 .

[0120] In this arrangement, when the drive nut 50 rotates relative to the screw 40 around the center axis L, the nut 50 can rotate relative to the screw 40, the first limit member 30 and the first connecting portion 122 around the center axis L to drive the screw 40 to move axially in the Y direction.

[0121] Alternatively, in some other possible designs, the nut 50 is fixedly connected to the first limiting member 30 , and the first limiting member 30 is rotatably connected to the first connecting portion 122 and the screw rod 40 .

[0122] The nut 50 can be fixedly connected to the first limiting member 30 by welding, bolt fixing, riveting fixing, interference fit, etc.

[0123] The first limiting member 30 is rotatably connected to the first connecting portion 122 and the screw 40 , such that the first limiting member 30 can rotate around the central axis L relative to the first connecting portion 122 and the screw 40 .

[0124] In this arrangement, when the drive nut 50 rotates relative to the screw 40 around the central axis L, the nut 50 can rotate together with the first limiter 30 around the central axis L relative to the screw 40 and the first connecting portion 122 to drive the screw 40 to move axially in the Y direction.

[0125] In some embodiments, the first stopper 30 is fixedly connected to the first connection portion 122, and the nut 50 is fixedly connected to the first stopper 30. The screw 40 is limited on the deformation portion 121 along the axial direction Y and is rotatably connected to the deformation portion 121 and the first stopper 30.

[0126] The first stopper 30 can be fixedly connected to the first connection portion 122 by welding, bolting, riveting, interference fit, etc. The nut 50 can be fixedly connected to the first stopper 30 by welding, bolting, riveting, interference fit, etc. In this way, the first connection portion 122, the first stopper 30, and the nut 50 are relatively fixed.

[0127] The screw rod 40 is limited on the deformation portion 121 along the axial direction Y, which means that the screw rod 40 is limited on the deformation portion 121 along the axial direction Y toward the resonance rod 20 and is limited on the deformation portion 121 along the axial direction Y away from the resonance rod 20.

[0128] The screw rod 40 is rotatably connected to the deformation portion 121 and the first limiting member 30 , and is configured to rotate around a central axis L relative to the deformation portion 121 and the first limiting member 30 .

[0129] By adopting the above technical solution, the screw rod 40 can be driven to rotate in the positive direction around the central axis L relative to the nut 50. Under the limiting action of the nut 50, the screw rod 40 can move away from the resonance rod 20 along the axial direction Y, thereby driving the deformation portion 121 to deform toward the first limiting member 30, thereby achieving a tuning effect. The screw rod 40 can also be driven to rotate in the opposite direction around the central axis L relative to the nut 50. Under the limiting action of the nut 50, the screw rod 40 can move toward the resonance rod 20 along the axial direction Y, thereby driving the deformation portion 121 to deform toward the resonance rod 20, thereby achieving a tuning effect. In this way, when the screw rod 40 is driven to rotate, the deformation portion 121 can be deformed toward or away from the resonance rod 20 under the drive of the screw rod 40, thereby achieving a tuning effect.

[0130] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A filter, characterized in that: include: The housing includes a first wall, wherein the first wall includes a deformable portion and a first connecting portion connected to an outer periphery of the deformable portion; a resonant rod, disposed in the housing, spaced apart from and opposite to the deformable portion; A first limiting member is provided on a side of the deformable portion away from the resonant rod and connected to the first connecting portion; the first limiting member is provided with a first groove on a side close to the deformable portion, and the first limiting member is provided with a through hole connected to the first groove; a screw, movably disposed in the through hole along the axial direction and connected to the deformation portion; The nut is threadedly connected to the screw; when the nut and the screw rotate relative to each other, the screw is used to move along the axial direction to drive the deformation part to deform.

2. The filter according to claim 1, wherein The first limiting member includes a protrusion and a second connecting portion; the second connecting portion is connected to the outer periphery of the protrusion and is connected to the first connecting portion; the protrusion is bent relative to the second connecting portion and protrudes in a direction away from the deformation portion to form the first groove.

3. The filter according to claim 2, characterized in that The raised portion comprises: Plane segment; The curved section is connected between the outer periphery of the planar section and the second connecting portion, and is bent relative to the planar section and the second connecting portion, and is surrounded by the planar section to form the first groove; the curved section is gradually expanded from the planar section to the second connecting portion.

4. The filter according to any one of claims 1 to 3, characterized in that The deformation portion includes a boss and a deformation section, the deformation section is connected between the outer periphery of the boss and the first connecting portion, the boss extends beyond the deformation section toward the first limiting member, and a portion of the screw is inserted into the boss.

5. The filter according to claim 4, characterized in that In the radial direction of the screw, the minimum dimension of the first groove is greater than the dimension of the boss.

6. The filter according to any one of claims 1 to 3, characterized in that: The screw is limited on the deformation part along the circumferential direction, and one end of the screw for connecting with the deformation part is limited on the deformation part toward the first limiting member along the axial direction; the first limiting member is limited on the first connecting part toward the deformation part along the axial direction; the nut abuts against the side of the first limiting member away from the deformation part, and is configured to rotate relative to the first limiting member.

7. The filter according to any one of claims 1 to 3, characterized in that: The nut is fixedly connected to the first limiting member, and the screw is fixedly connected to the deformation portion; the first limiting member is limited on the first connecting portion along the axial direction and is rotationally connected to the first connecting portion and the screw.

8. The filter according to claim 7, characterized in that The deformation portion is arranged on one side away from the resonant rod and is surrounded by the first connecting portion to form a second groove, and the inner peripheral wall of the second groove is provided with a third groove, and the third groove is extended along the circumference of the screw rod, and the peripheral edge of the first limiting member is limited in the third groove along the axial direction.

9. The filter according to any one of claims 1 to 3, characterized in that: The first limiting member is fixedly connected to the first connecting portion, and the screw is fixedly connected to the deforming portion; the nut is limited on the first limiting member along the axial direction and is rotatably connected to the first limiting member; Alternatively, the screw is fixedly connected to the deformation part; the filter also includes a second limit member, which is arranged on the side of the first limit member away from the deformation part and is fixedly connected to the first connection part; the nut is limited on the second limit member along the axial direction and is rotatably connected to the second limit member; the first limit member is fixedly connected to the first connection part, and the nut is configured to rotate relative to the first limit member, or the nut is fixedly connected to the first limit member, and the first limit member is rotatably connected to the first connection part and the screw.

10. The filter according to any one of claims 1 to 3, characterized in that: The first limiting member is fixedly connected to the first connecting portion, and the nut is fixedly connected to the first limiting member; the screw is limited on the deformation portion along the axial direction and is rotationally connected to the deformation portion and the first limiting member.

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