Filter and communication device

Abstract

This application provides a filter and a communication device. The filter includes a cavity, a resonator, and a cover assembly. The cavity has a receiving chamber, and the resonator is housed within the receiving chamber. The cover assembly includes a cover, a support, and an adjusting member. The cover covers the cavity and includes a deformable portion and a limiting structure connected to the surface of the deformable portion facing away from the resonator. The limiting structure has a limiting groove and includes a pressing portion. The support has a threaded hole and is connected to the cover. The adjusting member includes a limiting portion and a threaded portion. The limiting portion is rotatably housed within the limiting groove, and the threaded portion is threadedly connected to the threaded hole. The limiting portion has a pressing surface on the side facing away from the deformable portion. The pressing surface is planar and perpendicular to the axis of the adjusting member. The pressing portion presses against the pressing surface to limit the relative position of the limiting portion and the deformable portion along the axis of the adjusting member. The above-described filter effectively reduces the risk of the limiting portion disengaging from the limiting groove during resonant frequency adjustment, thereby improving the reliability of the filter.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a filter and a communication device. Background Technology

[0002] A filter typically includes a cavity, a resonant element, and a cover assembly, with the resonant element housed within the cavity. The cover assembly includes a cover, a support, and an adjusting component. The cover covers the cavity and includes a deformable portion and a limiting structure. The support is connected to the cover and has a threaded hole. The adjusting component includes a limiting portion and a threaded portion that are interconnected. The threaded portion is threaded into the threaded hole, and the limiting portion is rotatably connected to the limiting structure to restrict the relative position of the limiting portion and the deformable portion along the axis of the adjusting component. By rotating the adjusting component, it can be moved along its axis, thereby causing the deformable portion to deform along the axis of the adjusting component (i.e., the deformable portion moves closer to or further away from the resonant element within the cavity), thus adjusting the resonant frequency.

[0003] However, in related technologies, due to the poor connection stability between the limiting part and the limiting structure, the limiting part is prone to detaching from the limiting structure during the adjustment of the resonant frequency, resulting in adjustment failure and hindering the improvement of the filter's reliability. Utility Model Content

[0004] One of the objectives of this application is to provide a filter and a communication device that aims to solve the technical problem of low reliability of filters in related technologies.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application embodiment is as follows: a filter is provided, including a cavity, a resonator, and a cover plate assembly; the cavity has a receiving cavity; the resonator is housed in the receiving cavity; the cover plate assembly includes a cover, a support, and an adjusting member, the cover is placed on the cavity to close the receiving cavity, the cover includes a deformable part disposed opposite to the resonator and a limiting structure connected to the surface of the deformable part facing away from the resonator, the limiting structure has a limiting groove and includes a pressing part, the support has a threaded hole and is connected to the cover, the adjusting member includes a limiting part and a threaded part connected to each other, the limiting part is rotatably housed in the limiting groove, the threaded part is threadedly connected to the threaded hole, the side of the limiting part facing away from the deformable part is provided with a pressing surface, the pressing surface is a plane and perpendicular to the axis of the adjusting member, the pressing part is pressed against the pressing surface to limit the relative position of the limiting part and the deformable part along the axial direction of the adjusting member.

[0006] The beneficial effects of the filter provided in this application embodiment are as follows: By setting the pressing surface of the limiting part to a plane and making the pressing surface perpendicular to the axis of the adjusting member, after the pressing part is pressed against the pressing surface, the force exerted by the pressing part on the pressing surface is parallel to the axis of the adjusting member, and will not generate a component force in other directions. The force exerted by the pressing part on the pressing surface will not decrease due to being decomposed into components in other directions. In this way, the limiting part can be effectively restricted in the limiting groove along the axis of the adjusting member, effectively reducing the risk of the limiting part disengaging from the limiting groove during the adjustment of the resonant frequency, thereby improving the reliability of the filter.

[0007] In some embodiments of this application, the outer peripheral wall of the limiting part and the groove wall of the limiting groove are in clearance fit.

[0008] In some embodiments of this application, the limiting structure further includes a connecting portion, which protrudes from the surface of the deformable portion facing away from the resonator and has a limiting groove, and a pressing portion is connected to the connecting portion.

[0009] In some embodiments of this application, the crimping portion has an annular structure and is arranged around the opening of the limiting groove away from the deformable portion.

[0010] In some embodiments of this application, the connecting portion protrudes from the outer periphery of the pressing portion along the radial direction of the adjusting member.

[0011] In some embodiments of this application, the cover further includes a fixing part, which is connected to the deformable part and protrudes from the surface of the deformable part facing away from the resonator, and a support member is connected to the fixing part.

[0012] In some embodiments of this application, the support member includes a support body and a bent portion connected to the support body. The support body has a threaded hole, and the bent portion protrudes from the support body toward the fixing portion and is connected to the fixing portion.

[0013] In some embodiments of this application, the bending portion includes a first bending segment and a second bending segment. The first bending segment is connected to the support body and protrudes from the support body toward the fixing portion. The second bending segment is bent relative to the first bending segment and connected between the end of the first bending segment away from the support body and the fixing portion.

[0014] In some embodiments of this application, the support is welded to the fixing part.

[0015] This application also provides a communication device including the filter described in any of the above embodiments.

[0016] The beneficial effect of the communication device provided in this application embodiment is that the communication device provided in this application embodiment effectively improves the reliability of the communication device by adopting the filter described in any of the above embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the filter structure provided in an embodiment of this application;

[0019] Figure 2 for Figure 1 The diagram shows the exploded structure of the filter.

[0020] Figure 3 for Figure 1 The diagram shows the main view of the filter.

[0021] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the filter along line AA.

[0022] Figure 5 for Figure 4 The diagram shows the amplification structure at point B of the filter.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Filter;

[0025] 10. Cavity; 11. Receiving cavity;

[0026] 20. Resonant components;

[0027] 30. Cover plate assembly; 31. Cover body; 311. Deformable part; 312. Limiting structure; 3121. Pressing part; 3122. Connecting part; 31221. Limiting groove; 313. Fixing part; 32. Support member; 321. Support body; 3211. Threaded hole; 322. Bending part; 3221. First bending section; 3222. Second bending section; 33. Adjusting member; 331. Limiting part; 3311. Pressing surface; 332. Threaded part. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are used only for ease of description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first," "second," "third," and "fourth" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0030] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0031] In communication equipment, filters selectively allow signals in the target frequency band to pass through while suppressing out-of-band interference and noise to ensure the stability of the communication equipment. To enable filters to adapt to dynamic environments, their resonant frequency typically needs to be adjusted.

[0032] In related technologies, filters generally include a cavity, a resonator, and a cover assembly, with the resonator housed within the cavity. The cover assembly includes a cover, a support, and an adjusting component. The cover covers the cavity and includes a deformable portion and a limiting structure. The support is connected to the cover and has a threaded hole. The adjusting component includes a limiting portion and a threaded portion connected to each other. The threaded portion is threaded into the threaded hole. The limiting portion is rotatably housed within a limiting groove of the limiting structure, and the pressing portion of the limiting structure presses against the pressing inclined surface of the limiting portion to limit the relative position of the limiting portion and the deformable portion along the axial direction of the adjusting component. By rotating the adjusting component, it can be moved along its axial direction, thereby causing the deformable portion to deform along the axial direction of the adjusting component (i.e., the deformable portion moves closer to or further away from the resonator within the cavity), thus achieving adjustment of the resonant frequency.

[0033] However, since the pressing part of the limiting structure is pressed onto the pressing slope of the limiting part, the force exerted by the pressing part on the limiting part is decomposed into a component force along the axis parallel to the adjusting member and a component force along other directions. This results in a smaller limiting force used to restrict the relative position of the limiting part and the deformable part along the axis of the adjusting member, and poor connection stability between the limiting part and the limiting structure. During the adjustment of the resonant frequency, the limiting part is prone to detach from the limiting structure, leading to adjustment failure and hindering the improvement of the filter's reliability.

[0034] To improve the reliability of the filter, the filter provided in this application sets the pressing surface of the limiting part as a plane and makes the pressing surface perpendicular to the axis of the adjusting member. After the pressing part is pressed against the pressing surface, the force exerted by the pressing part on the pressing surface is parallel to the axis of the adjusting member and does not generate a component force in other directions. This can effectively restrict the limiting part in the limiting groove along the axis of the adjusting member, effectively reducing the risk of the limiting part disengaging from the limiting groove during the adjustment of the resonant frequency, thereby improving the reliability of the filter.

[0035] The coupling device provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0036] Firstly, please refer to the following: Figures 1 to 5 This application provides a filter 100, including a cavity 10, a resonator 20, and a cover plate assembly 30. The cavity 10 has a receiving cavity 11, and the resonator 20 is housed within the receiving cavity 11. The cover plate assembly 30 includes a cover 31, a support member 32, and an adjusting member 33. The cover 31 covers the cavity 10 to close the receiving cavity 11. The cover 31 includes a deformable portion 311 facing the resonator 20 and a limiting structure 312 connected to the surface of the deformable portion 311 facing away from the resonator 20. The limiting structure 312 has a limiting groove 31221 and includes a pressing portion 3121. The support member 32 has a threaded hole 3211 and is connected to the cover 31. The adjusting member 33 includes interconnected... The limiting part 331 and the threaded part 332 are connected. The limiting part 331 is rotatably housed in the limiting groove 31221, and the threaded part 332 is threadedly connected to the threaded hole 3211. The limiting part 331 has a pressing surface 3311 on the side opposite to the deformable part 311. The pressing surface 3311 is a plane and perpendicular to the axis of the adjusting member 33. The pressing part 3121 is pressed onto the pressing surface 3311 to limit the relative position of the limiting part 331 and the deformable part 311 along the axial direction of the adjusting member 33.

[0037] Cavity 10 provides the internal environment of filter 100, at least a portion of which constitutes the aforementioned receiving cavity 11. The shape of cavity 10 is not limited in this application; for example, cavity 10 can be a cylindrical structure, an elliptical cylinder structure, a prism structure, etc. When cavity 10 is a prism structure, it can be a square prism, a pentagonal prism, a hexagonal prism, etc. Cavity 10 is made of a metallic material, such as aluminum, iron, steel, copper, etc.

[0038] The resonator 20 is housed within the receiving cavity 11. It can be understood that the resonator 20 can be located at the center of the cavity 10, meaning the central axis of the resonator 20 coincides with the central axis of the cavity 10; alternatively, the resonator 20 can be located off-center from the cavity 10, meaning the central axis of the resonator 20 is parallel to but does not coincide with the central axis of the cavity 10. The resonator 20 can be a metallic resonator or a dielectric resonator. When the resonator 20 is a dielectric resonator, it can be made of ceramic material.

[0039] The cover 31 is used to seal the opening of the cavity 10 to close the receiving cavity 11. The shape of the cover 31 can be adapted to the shape of the cavity 10. The cover 31 is made of a metal material, which can be, but is not limited to, aluminum alloy, aluminum, iron, steel, copper, etc.

[0040] The deformable portion 311 is positioned opposite to the resonator 20 and can deform in a direction closer to or further away from the resonator 20 under the action of an external force, thereby adjusting the resonant frequency. Understandably, the thickness of the deformable portion 311 is less than the thickness of other parts of the cover 31, so that the deformable portion 311 can deform under the action of an external force. In some embodiments, the deformable portion 311 is made of a high-toughness soft aluminum alloy, which further facilitates the deformation of the deformable portion 311 under the action of an external force.

[0041] The limiting structure 312 is used to limit the relative position of the adjusting member 33 and the deformable part 311 along the axial direction of the adjusting member 33. That is, during the process of the adjusting member 33 moving along the axial direction, the deformable part 311 can move synchronously with the adjusting member 33 so that the deformable part 311 deforms. The limiting groove 31221 is used to accommodate the limiting part 331 of the adjusting member 33, and the pressing part 3121 is used to press the pressing surface 3311 of the limiting part 331. After the limiting part 331 is assembled into the limiting groove 31221, the pressing part 3121 can be bent toward the middle of the limiting groove 31221 so that the pressing part 3121 is pressed onto the pressing surface 3311. During the process of the adjusting member 33 moving away from the resonator 20 along the axial direction, the pressing part 3121 applies a reaction force from the limiting part 331 toward the resonator 20 to the limiting part 331 so as to restrict the limiting part 331 within the limiting groove 31221.

[0042] In some embodiments, the cover 31 further includes a fixing part 313, which is connected to the deformable part 311 and protrudes from the surface of the deformable part 311 facing away from the resonator 20, and the support member 32 is connected to the fixing part 313.

[0043] Understandably, the cover 31 can be an integrally formed component, with at least a portion of the cover 31 thinned to form a deformable portion 311, and a fixing portion 313 formed in the unthinned area of ​​the cover 31; or, the cover 31 can be a split-formed component, for example, the cover 31 can include a ring plate and a deformable plate, the deformable plate being connected to the inner circumference of the ring plate or the deformable plate being connected to the bottom of the ring plate, the ring plate and the deformable plate being fixedly connected by welding, bonding, fastener connection, snap-fitting, pressing, riveting, etc., wherein the fixing portion 313 is located on the ring plate and the deformable portion 311 is located on the deformable plate.

[0044] The cover 31 can be fixed to the cavity 10 by the fixing part 313. The fixing part 313 can be fixed to the cavity 10 by welding, fastener connection, bonding, snap-fitting, riveting, pressing, etc.

[0045] The support member 32 is connected to the fixed part 313, and the threaded part 332 of the adjusting member 33 is threadedly connected to the threaded hole 3211 of the support member 32. The adjusting member 33 is used to control the deformation direction and deformation amplitude of the deformable part 311, thereby adjusting the resonant frequency. It can be understood that the support member 32 is fixedly connected to the fixed part 313, so that the support member 32 can neither rotate around its own axis nor move in the depth direction of the cavity 10, while the adjusting member 33 can rotate relative to the cover 31 and the support member 32 around its own axis, but cannot move relative to the deformable part 311 in the depth direction of the cavity 10. By rotating the threaded part 332, under the threaded engagement of the threaded part 332 and the threaded hole 3211, the adjusting member 33 can gradually move closer to or away from the resonator 20 along the axial direction, so as to drive the deformable part 311 to deform in the direction closer to the resonator 20 or in the direction away from the resonator 20, thereby adjusting the resonant frequency.

[0046] Optionally, the support member 32 is made of a metallic material, such as aluminum, iron, steel, copper, etc. Alternatively, the support member 32 is made of a non-metallic material, such as plastic, ceramic, wood, etc. Understandably, the threaded hole 3211 may have internal threads throughout its entire length, or only a portion of its length may have internal threads.

[0047] In some embodiments, the adjusting member 33 may be arranged coaxially with the resonator 20, or the adjusting member 33 may be arranged coaxially with the resonator 20.

[0048] In some embodiments, the shape of the limiting groove 31221 is adapted to the outer peripheral contour shape of the limiting portion 331. For example, the outer peripheral contour shape of the limiting portion 331 can be circular, and correspondingly, the shape of the limiting groove 31221 is circular. Of course, in other embodiments, the outer peripheral contour shape of the limiting portion 331 can also be other shapes. For example, the outer peripheral surface of the limiting portion 331 is composed of multiple arc surfaces that are spaced apart along the circumference of the adjusting member 33. The multiple arc surfaces can be arranged at equal intervals or at unequal intervals along the circumference of the adjusting member 33. The lengths of the multiple arc surfaces can all be the same or different from each other.

[0049] In some embodiments, the outer peripheral surface of the limiting part 331 is perpendicular to the deformable part 311 and parallel to the inner peripheral wall of the limiting groove 31221. This increases the facing area between the outer peripheral surface of the limiting part 331 and the inner peripheral wall of the limiting groove 31221, so that the limiting groove 31221 can have a better radial limiting effect on the adjusting member 33, making the rotation of the adjusting member 33 more stable and the installation stability of the adjusting member 33 better, and preventing skewing during rotation.

[0050] The pressing surface 3311 provides the pressing space for the pressing portion 3121. It can be understood that the pressing surface 331 may be formed by the entire surface of the limiting portion 331 facing away from the deformable portion 311, or it may be formed by a portion of the surface of the limiting portion 331 facing away from the deformable portion 311. The pressing surface 3311 is planar and perpendicular to the axis of the adjusting member 33. In some embodiments, the pressing portion 3121 may be parallel to and fitted with the pressing surface 3311, or the pressing portion 3121 may not be parallel to the pressing surface 3311, with one end of the pressing portion 3121 pressed onto the pressing surface 3311.

[0051] The filter 100 provided in this application embodiment sets the pressing surface 3311 of the limiting part 331 as a plane and makes the pressing surface 3311 perpendicular to the axis of the adjusting member 33. After the pressing part 3121 presses against the pressing surface 3311, the force exerted by the pressing part 3121 on the pressing surface 3311 is parallel to the axis of the adjusting member 33 and does not generate a component force in other directions (e.g., along the radial direction of the adjusting member 33). The force exerted by the pressing part 3121 on the pressing surface 3311 will not decrease due to being decomposed into component forces in other directions. In this way, the limiting part 331 can be effectively restricted in the limiting groove 31221 along the axial direction of the adjusting member 33, which effectively reduces the risk of the limiting part 331 disengaging from the limiting groove 31221 during the adjustment of the resonant frequency, thereby improving the reliability of the filter 100.

[0052] In addition, compared with the technical solution where the pressing surface 3311 is an inclined surface, when the pressing surface 3311 has the same radial dimension along the adjusting member 33, setting the pressing surface 3311 as a plane and making the pressing surface 3311 perpendicular to the axis of the adjusting member 33 can effectively reduce the contact area between the pressing part 3121 and the pressing surface 3311. This can effectively prevent the pressing part 3121 from generating a radial component force on the pressing surface 3311 along the adjusting member 33, thereby effectively reducing the rotational resistance of the limiting part 331 in the limiting groove 31221, making it easier to rotate the adjusting member 33 smoothly, and reducing the risk of jamming or obstruction of the adjusting member 33 during rotation.

[0053] In some embodiments of this application, please refer to Figure 5 The outer peripheral wall of the limiting part 331 is fitted with the groove wall of the limiting groove 31221 with clearance.

[0054] In other words, there is a certain gap between the outer peripheral wall of the limiting part 331 and the inner peripheral wall of the limiting groove 31221. The size of the gap can be determined according to the actual application needs, and can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 1mm, 1.5mm, 2mm, etc.

[0055] By adopting the above technical solution, the rotational resistance of the limiting part 331 in the limiting groove 31221 can be further reduced, making it easier to rotate the adjusting part 33 smoothly.

[0056] In some embodiments of this application, please refer to Figure 5 The limiting structure 312 also includes a connecting part 3122, which protrudes from the surface of the deformable part 311 facing away from the resonator 20 and has a limiting groove 31221. The pressing part 3121 is connected to the connecting part 3122.

[0057] Understandably, the connecting part 3122 is used to connect the deformable part 311 and the crimping part 3121.

[0058] In some embodiments, the connecting portion 3122 protrudes from the surface of the deformable portion 311 facing away from the resonator 20, the limiting groove 31221 is recessed in the surface of the connecting portion 3122 facing away from the deformable portion 311, and the pressing portion 3121 is connected to the surface of the connecting portion 3122 facing away from the deformable portion 311.

[0059] By adopting the above technical solution, not only can the connection strength between the limiting structure 312 and the deformable part 311 be effectively improved, but the pressing part 3121 can also be effectively supported, thereby more effectively restricting the limiting part 331 in the limiting groove 31221 along the axial direction of the adjusting member 33, further reducing the risk of the limiting part 331 dislodging from the limiting groove 31221 during the adjustment of the resonant frequency, and thus further improving the reliability of the filter 100.

[0060] In some embodiments, the limiting structure 312 and the deformable part 311 are integrally formed.

[0061] It is understood that in this embodiment, the bottom wall of the limiting groove 31221 can be formed by the deformable part 311, that is, the limiting groove 31221 is formed by the connecting part 3122 and the deformable part 311 together. Of course, in this embodiment, the bottom wall of the limiting groove 31221 may not be formed by the deformable part 311, but by the connecting part 3122 itself, that is, the limiting groove 31221 is a blind groove recessed on the surface of the connecting part 3122 facing away from the deformable part 311.

[0062] In some embodiments, the limiting structure 312 and the deformable part 311 are separately connected.

[0063] It is understood that in this embodiment, the bottom wall of the limiting groove 31221 may not be formed by the deformable part 311, but by the connecting part 3122 itself. That is, the limiting groove 31221 is a blind groove recessed on the surface of the connecting part 3122 facing away from the deformable part 311. Of course, in this embodiment, the bottom wall of the limiting groove 31221 may also be formed by the deformable part 311. That is, the limiting groove 31221 is formed by the connecting part 3122 and the deformable part 311 together.

[0064] Specifically, the limiting structure 312 is separately connected to the deformable part 311, and the limiting groove 31221 is a blind groove recessed on the surface of the connecting part 3122 facing away from the deformable part 311.

[0065] By using a separate connection between the limiting structure 312 and the deformable part 311, and setting the limiting groove 31221 as a blind groove recessed on the surface of the connecting part 3122 facing away from the deformable part 311, the pressing work between the adjusting member 33 and the pressing part 3121 can be completed before the limiting structure 312 and the deformable part 311 are connected. Based on this, the deformable part 311 will not be involved in the pressing operation, reducing the risk of deformation or damage to the deformable part 311 during the pressing operation between the pressing part 3121 and the adjusting member 33.

[0066] In some embodiments of this application, please refer to Figure 5 The pressing part 3121 has a ring-shaped structure and is arranged around the opening of the limiting groove 31221 away from the deformable part 311.

[0067] The crimping portion 3121 has a ring-shaped structure. It can be understood that the entire crimping portion 3121 can be a complete continuous ring, or the entire crimping portion 3121 can be a discontinuous ring.

[0068] In some embodiments, the pressing surface 3311 has an annular structure and is arranged around the threaded portion 332. After the limiting portion 331 is assembled into the limiting groove 31221, the pressing portion 3121 can be bent toward the center of the limiting groove 31221 so that the pressing portion 3121 is pressed onto the pressing surface 3311.

[0069] By adopting the above technical solution, the pressing part 3121 can apply downward pressure to the pressing surface 3311 along the circumference of the adjusting member 33 to a greater extent, thereby more effectively restricting the limiting part 331 in the limiting groove 31221 along the axial direction of the adjusting member 33, further reducing the risk of the limiting part 331 dislodging from the limiting groove 31221 during the adjustment of the resonant frequency, and thus further improving the reliability of the filter 100.

[0070] Of course, in other embodiments, the crimping part 3121 is not annular. The crimping part 3121 can be a protrusion, rib, or other structure. The protrusion, rib, or other structure is located in the groove of the limiting groove 31221 away from the groove of the deformable part 311.

[0071] In some embodiments of this application, please refer to Figure 5 Along the radial direction of the adjusting member 33, the connecting part 3122 protrudes from the outer peripheral side of the pressing part 3121.

[0072] In other words, at least a portion of the connecting portion 3122 protrudes from the outer periphery of the pressing portion 3121 along the radial direction of the adjusting member 33.

[0073] In some embodiments, both the connecting portion 3122 and the crimping portion 3121 are annular structures. The inner annular space of the connecting portion 3122 forms a limiting groove 31221. The crimping portion 3121 is circumferentially disposed in the limiting groove 31221. The crimping portion 3121 and the connecting portion 3122 can be coaxially or non-coaxially disposed. Along the radial direction of the adjusting member 33, the outer peripheral side of the connecting portion 3122 protrudes relative to the outer peripheral side of the crimping portion 3121.

[0074] By adopting the above technical solution, not only can the connection strength between the limiting structure 312 and the deformable part 311 be further improved, but the pressing part 3121 can also be supported more effectively, effectively improving the overall structural strength of the limiting structure 312. This more effectively confines the limiting part 331 within the limiting groove 31221 along the axial direction of the adjusting member 33, further reducing the risk of the limiting part 331 disengaging from the limiting groove 31221 during resonant frequency adjustment, thereby further improving the reliability of the filter 100. Furthermore, during the pressing operation of the pressing part 3121 towards the center of the limiting groove 31221, the end face of the connecting part 3122 away from the deformable part 311 can serve as a pressing support platform, avoiding the use of the deformable part 311 as the pressing support platform. This effectively reduces the pressing difficulty, improves pressing efficiency, and prevents damage to the deformable part 311 when it is used as the pressing support platform. Furthermore, the connecting part 3122 protrudes from the outer periphery of the pressing part 3121, resulting in a larger thickness of the connecting part 3122 along the radial direction of the adjusting member 33. This strengthens the structural strength of the connecting part 3122 itself and enhances the connection strength between the connecting part 3122 and the deformable part 311. The connecting part 3122 is less likely to skew or deform relative to the deformable part 311. Therefore, the limiting groove 31221 can provide a better radial limiting effect for the adjusting member 33, making the rotation of the adjusting member 33 more stable and improving the installation stability of the adjusting member 33, preventing skew during rotation.

[0075] Please refer to some embodiments of this application as well. Figure 2 , Figure 4 and Figure 5 The support member 32 includes a support body 321 and a bent portion 322 connected to the support body 321. The support body 321 has a threaded hole 3211, and the bent portion 322 protrudes from the support body 321 toward the fixing portion 313 and is connected to the fixing portion 313.

[0076] The support body 321 is the main part of the support member 32. It can be understood that the support body 321 and the deformable part 311 are separated along the axial direction of the adjusting member 33 to form the deformation space of the deformable part 311. At least part of the threaded part 332 and the limiting part 331 are located in the deformation space.

[0077] The bent portion 322 is used to connect the fixing portion 313, and the bent portion 322 protrudes from the supporting body 321 in a direction close to the cover 31. Understandably, the bent portion 322 is set at an angle to the supporting body 321, and the bent portion 322 may be perpendicular to the supporting body 321 or not. The supporting body 321 and the bent portion 322 can be integrally formed components. For example, the supporting member 32 is integrally formed by a stamping process, with the middle part of the supporting member 32 constituting the supporting body 321 and the outer periphery of the supporting member 32 constituting the bent portion 322. The supporting body 321 and the bent portion 322 can also be separately formed components. For example, the supporting body 321 and the bent portion 322 are formed separately and then connected into a whole.

[0078] In some embodiments, the bending portion 322 has a ring-shaped structure, and the bending portion 322 is arranged around the support body 321 and connected to the outer periphery of the support body 321.

[0079] By adopting the above technical solution, not only can a large space be formed between the cover 31 and the support 32, thus reserving sufficient space for the displacement of the adjustment member 33 and the deformation of the deformation part 311, but also the deformation space that should have been provided by the cover 31 can be partially or completely transferred to the support 32, which can effectively reduce the thickness of the cover 31, thereby saving the manufacturing cost and weight of the filter 100.

[0080] Please refer to some embodiments of this application as well. Figure 2 , Figure 4 and Figure 5 The bending portion 322 includes a first bending segment 3221 and a second bending segment 3222. The first bending segment 3221 is connected to the support body 321 and protrudes from the support body 321 toward the fixing portion 313. The second bending segment 3222 is bent relative to the first bending segment 3221 and is connected between the end of the first bending segment 3221 away from the support body 321 and the fixing portion 313.

[0081] Understandably, the first bending segment 3221 protrudes from the supporting body 321 toward the direction of the cover 31, and the second bending segment 3222 protrudes from the first bending segment 3221 toward the direction of the supporting body 321. The first bending segment 3221 may be perpendicular to the supporting body 321 or not, and the second bending segment 3222 may be perpendicular to the first bending segment 3221 or not.

[0082] In some embodiments, the fixing part 313 has a connecting surface, and the second bent segment 3222 is connected to the connecting surface and arranged parallel to the connecting surface. As an example, the connecting surface is a plane and perpendicular to the axis of the adjusting member 33, that is, the second bent segment 3222 is perpendicular to the axis of the adjusting member 33.

[0083] By adopting the above technical solution, the connection area between the support member 32 and the cover 31 can be increased without occupying the deformation space of the deformable part 311, thereby effectively improving the connection strength and connection stability between the support member 32 and the cover 31.

[0084] In some embodiments of this application, the support member 32 is welded to the fixing part 313.

[0085] In some embodiments, the support member 32 includes a support body 321 and a bent portion 322 connected to the support body 321, the bent portion 322 being welded to the fixing portion 313. As an example, the bent portion 322 has a ring-shaped structure, the bent portion 322 is arranged around the support body 321 and connected to the outer periphery of the support body 321, and the bent portion 322 is welded to the fixing portion 313 along the circumferential direction to form a ring weld mark, thereby effectively improving the connection strength and connection stability between the support member 32 and the cover 31.

[0086] In some embodiments, the support member 32 and the fixing part 313 are made of the same material. For example, the support member 32 and the fixing part 313 are both made of aluminum alloy, and the support member 32 and the fixing part 313 are connected into a whole by laser welding process.

[0087] Of course, in other embodiments, the support member 32 and the fixing part 313 can also be welded by other welding processes, such as electric arc welding, submerged arc welding, gas welding, etc.

[0088] By adopting the above technical solution, it is not only convenient to connect the support member 32 and the fixing part 313, but also to further improve the connection strength and connection stability between the support member 32 and the cover 31.

[0089] Secondly, embodiments of this application provide a communication device including the filter 100 described in any of the above embodiments.

[0090] The communication device provided in this application embodiment effectively improves the reliability of the communication device by employing the filter 100 described in any of the above embodiments.

[0091] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A filter, characterized in that, The filter includes: A cavity, having a receiving cavity; The resonator is housed within the receiving cavity; A cover assembly includes a cover body, a support member, and an adjusting member. The cover body covers the cavity to close the receiving cavity. The cover body includes a deformable portion disposed opposite to the resonator and a limiting structure connected to the surface of the deformable portion facing away from the resonator. The limiting structure has a limiting groove and includes a pressing portion. The support member has a threaded hole and is connected to the cover body. The adjusting member includes a limiting portion and a threaded portion connected to each other. The limiting portion is rotatably accommodated in the limiting groove. The threaded portion is threadedly connected to the threaded hole. The side of the limiting portion facing away from the deformable portion has a pressing surface. The pressing surface is planar and perpendicular to the axis of the adjusting member. The pressing portion presses against the pressing surface to limit the relative position of the limiting portion and the deformable portion along the axial direction of the adjusting member.

2. The filter according to claim 1, characterized in that, The outer peripheral wall of the limiting part is fitted with the groove wall of the limiting groove with a clearance.

3. The filter according to claim 1, characterized in that, The limiting structure further includes a connecting part, which protrudes from the surface of the deformable part facing away from the resonator and has the limiting groove, and the pressing part is connected to the connecting part.

4. The filter according to claim 3, characterized in that, The pressing part has a ring-shaped structure and is arranged around the opening of the limiting groove away from the deformable part.

5. The filter according to claim 4, characterized in that, Along the radial direction of the adjusting member, the connecting portion protrudes from the outer peripheral side of the crimping portion.

6. The filter according to any one of claims 1-5, characterized in that, The cover also includes a fixing part, which is connected to the deformable part and protrudes from the surface of the deformable part facing away from the resonator. The support member is connected to the fixing part.

7. The filter according to claim 6, characterized in that, The support member includes a support body and a bent portion connected to the support body. The support body has the threaded hole, and the bent portion protrudes from the support body toward the fixing portion and is connected to the fixing portion.

8. The filter according to claim 7, characterized in that, The bending portion includes a first bending segment and a second bending segment. The first bending segment is connected to the support body and protrudes from the support body toward the fixing portion. The second bending segment is bent relative to the first bending segment and connected between the end of the first bending segment away from the support body and the fixing portion.

9. The filter according to claim 6, characterized in that, The support member is welded to the fixing part.

10. A communication device, characterized in that, The communication device includes a filter as described in any one of claims 1-9.

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