Coupling adjustment structure and filter

Abstract

The present application relates to the field of radio frequency devices, and provides a coupling adjustment structure and a filter. The coupling adjustment structure includes a mounting part that is rotatably mounted on a through hole, and a coupling part connected to one end of the mounting part. The mounting part includes a mounting platform and a buckle connected to the side of the mounting platform close to the coupling part. The mounting platform is axially limited to the through hole, limiting the mounting part from being dislodged from the through hole in a direction close to the coupling part. The end of the buckle away from the mounting platform is protruded outward to form a buckle protrusion, which is buckled to the edge of the through hole, limiting the mounting part from being dislodged from the through hole in a direction away from the coupling part. The coupling adjustment structure can be stably rotatably mounted on the through hole in an inverted mounting manner, thereby simplifying and facilitating the assembly operation of the coupling adjustment structure, and improving the assembly convenience and efficiency of the coupling adjustment structure. The coupling adjustment structure has a simple structure, reduces components such as nuts and screws, and can avoid occupying too much additional space in the filter, thereby facilitating the miniaturization of the filter.

Description

Technical Field

[0001] The present application belongs to the technical field of radio frequency devices, and in particular relates to a coupling adjustment structure and a filter. Background Art

[0002] As a radio frequency device, filters can be used to select communication signals and filter out clutter or interference signals outside the communication signal frequency, and are widely used in the field of communications. Existing filters generally include a cover plate with a threaded hole, a coupling adjustment screw threadedly connected to the threaded hole, and a locking nut threadedly connected to the upper end of the coupling adjustment screw and locking the coupling adjustment screw to the cover plate. Based on this, the assembly operation of the coupling adjustment screw is relatively cumbersome and the assembly efficiency is relatively low. At the same time, the assembly of the coupling adjustment screw requires a large number of parts, which takes up additional space outside the filter housing, making the filter appearance and structure complex, which is not conducive to the miniaturization of the filter. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a coupling adjustment structure to solve the problems that the assembly operation of the existing coupling adjustment screw is relatively cumbersome, the assembly efficiency is relatively low, and it occupies a large space.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a coupling adjustment structure, including a mounting member rotatably mounted on a through hole, and a coupling member connected to one end of the mounting member, the mounting member including a mounting platform and a buckle connected to the side of the mounting platform close to the coupling member, the mounting platform is axially limited to the through hole, limiting the mounting member from escaping from the through hole in a direction close to the coupling member, the end of the buckle away from the mounting platform is protruded outward to form a buckle protrusion, the buckle protrusion is buckled to the edge of the through hole, limiting the mounting member from escaping from the through hole in a direction away from the coupling member.

[0005] In one embodiment, a first conical surface is provided on a side of the mounting platform close to the buckle, and a radial dimension of the first conical surface is gradually reduced in a direction close to the coupling member.

[0006] In one embodiment, a second conical surface is provided on a side of the snap-fit ​​protrusion close to the mounting platform, and a radial dimension of the second conical surface is gradually reduced in a direction away from the coupling member.

[0007] In one embodiment, the buckle is arranged in a ring shape, and the buckle is provided with at least one truncation groove in the circumferential direction.

[0008] In one embodiment, the mounting member further includes an extension body connected to the mounting platform and extending in a direction close to the coupling member, and the outer periphery of the extension body is spaced apart from the inner periphery of the buckle.

[0009] In one embodiment, a side of the mounting member away from the coupling member is lower than or flush with an opening of the through hole.

[0010] In one embodiment, the mounting member and the coupling member are connected separately or integrally.

[0011] In one embodiment, an adjustment groove is formed on the end surface of the mounting member away from the coupling member, and the adjustment groove is used for an external tool to drive the mounting member to rotate.

[0012] In one embodiment, the mounting member is an insulating member, and the coupling member is a metal member;

[0013] Alternatively, the mounting member and the coupling member are both metal members;

[0014] Alternatively, the mounting member and the coupling member are both insulating members, and a portion or the entirety of the coupling member is covered with a metal layer.

[0015] The embodiment of the present application also aims to provide a filter, comprising a cavity, a cover plate covering the cavity, a plurality of resonant rods disposed in the cavity, and at least one coupling adjustment structure;

[0016] Each of the resonant rods is mounted on the cavity, and the cover plate is provided with the through hole for mounting the coupling adjustment structure; or each of the resonant rods is mounted on the cover plate, and the cavity is provided with the through hole for mounting the coupling adjustment structure.

[0017] In one embodiment, at least one coupling adjustment structure is provided between two adjacent resonant rods and is used to adjust the coupling strength between the two adjacent resonant rods;

[0018] And / or, the number of the resonant rods is at least three, the cavity has a coupling window, and the coupling adjustment structure is provided in the coupling window and is used to adjust the passband out-of-band suppression.

[0019] In one embodiment, the cover plate or the cavity is provided with a recessed groove on a side of the through hole corresponding to the snap protrusion.

[0020] The beneficial effects provided by this application are:

[0021] The coupling adjustment structure provided by the embodiments of the present application, during assembly, the mounting member can be first aligned with the corresponding through hole, and then a pressing force is applied to the mounting member to insert the mounting member into the through hole and the buckle adaptively elastically contracts and deform until the buckle protrusion passes through the through hole. After the buckle protrusion passes through the through hole, the buckle returns from the contracted state, and the buckle protrusion is buckled to the edge of the through hole. At this time, a buckle fit is formed between the buckle protrusion and the edge of the through hole, which can effectively prevent the mounting member from being disengaged from the through hole in the direction away from the coupling member. The cooperation between the mounting table and the through hole can effectively prevent the mounting member from being disengaged from the through hole in the direction close to the coupling member. Thus, the mounting member can be stably rotationally mounted in the through hole in an inverted mounting manner, and the axial positions of the mounting member and the coupling member connected to the mounting member relative to the through hole can be stabilized. Moreover, it also allows an external force to drive the mounting member to rotate in the through hole and drive the coupling member to rotate synchronously. Therefore, the assembly operation of the coupling adjustment structure can be effectively simplified and facilitated, and the assembly convenience and assembly efficiency of the coupling adjustment structure can be effectively guaranteed and improved. At the same time, because this structure is simple and the components such as nuts and screws are reduced, therefore, for the filter adopting the coupling adjustment structure provided by the embodiments of the present application, it can avoid the coupling adjustment structure occupying too much extra space of the filter, which is beneficial to the miniaturization of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Stereo schematic of the coupling adjustment structure provided by Embodiment 1 of the present application Figure 1 , wherein, the coupling member is in the shape of a rectangular sheet;

[0024] Figure 2 is Figure 1 Cross-sectional view of the coupling adjustment structure provided;

[0025] Figure 3 Stereo schematic of the coupling adjustment structure provided by Embodiment 1 of the present application Figure 2 , wherein, the coupling member is in the shape of a U-shaped sheet;

[0026] Figure 4 Stereo schematic of the filter provided by Embodiment 1 of the present application;

[0027] Figure 5 is Figure 4 Cross-sectional view of the filter provided;

[0028] Figure 6 is Figure 5Magnified image of region A is provided;

[0029] Figure 7 A schematic diagram of the coupling adjustment structure and the through hole provided in the second embodiment of the present application;

[0030] Figure 8 A three-dimensional schematic diagram of the coupling adjustment structure provided in Example 3 of the present application;

[0031] Figure 9 A three-dimensional schematic diagram of the filter provided in Example 8 of the present application;

[0032] Figure 10 for Figure 9 A top view of a portion of the filter structure provided;

[0033] Figure 11 Schematic diagram of the coordination of the coupling adjustment structure and the through hole provided in the ninth embodiment of the present application.

[0034] Among them, the reference numerals in the figures are:

[0035] 10-coupling adjustment structure, 11-mounting part, 111-mounting platform, 1111-first conical surface; 112-clip, 1121-clip protrusion, 1122-clip base, 1123-second conical surface, 1124-truncated groove; 113-extension body; 114-adjustment groove; 12-coupling part; 13-coupling rod, 14-flying rod; 20-cavity, 21-coupling window, 22-resonance cavity; 30-cover plate, 31-through hole, 311-limiting hole section, 32-sunk groove; 40-resonance rod, 41-resonance disk, 42-flanged edge. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] 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.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "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 internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0040] Filters, as radio frequency devices, are widely used in the communications field. They can select communication signals and filter out clutter or interference signals outside the communication signal frequency range. Existing filters typically include a cover plate with a threaded hole, a coupling adjustment screw threaded into the threaded hole, and a locking nut threaded onto the upper end of the coupling adjustment screw to secure the coupling adjustment screw to the cover plate.

[0041] Based on this, the existing filters have the following problems:

[0042] 1. The coupling adjustment screw needs to be threadedly matched with the threaded hole and nut of the cover plate, which makes the assembly operation of the coupling adjustment screw relatively cumbersome and the assembly efficiency relatively low;

[0043] Second, the cover plate needs to be tapped with threaded holes, which results in high processing costs and low processing efficiency;

[0044] 3. Whether during assembly or adjustment, the coupling adjustment screw needs to rotate relative to the cover plate. During rotation, burrs and debris are inevitably generated. If the burrs and debris fall into the filter, the intermodulation and power performance of the filter will inevitably be reduced.

[0045] Fourth, there are too many components such as coupling adjustment screws and nuts, and most of them protrude from the outside of the filter housing, resulting in excessive space outside the filter housing, increasing the complexity of the filter's appearance and structure, and being detrimental to the miniaturization of the filter.

[0046] Therefore, the embodiments of the present application provide a coupling adjustment structure that can improve the above problems.

[0047] The following describes the specific implementation of this application in more detail with reference to specific embodiments:

[0048] Example 1

[0049] See also Figure 1 、 Figure 2 、 Figure 6 The embodiment of the present application provides a coupling adjustment structure 10, comprising a mounting member 11 rotatably mounted on a through hole 31, and a coupling member 12 connected to one end of the mounting member 11. The mounting member 11 comprises a mounting platform 111 and a buckle 112 connected to the side of the mounting platform 111 close to the coupling member 12. The mounting platform 111 is axially limited to the through hole 31 and restricts the mounting member 11 from being removed from the through hole 31 in a direction close to the coupling member 12. The buckle 112 is protruded outwardly at one end away from the mounting platform 111 to form a buckle protrusion 1121. The buckle protrusion 1121 is buckled to the edge of the through hole 31 and restricts the mounting member 11 from being removed from the through hole 31 in a direction away from the coupling member 12. The "through hole 31" mentioned throughout the text refers to the through hole 31 opened on the filter housing and used to mount the coupling adjustment structure 10.

[0050] The buckle 112 includes a buckle base 1122 extending in a direction toward the coupling member 12 and configured to be rotatably mounted within the through hole 31, and a buckle protrusion 1121 extending outwardly from the end of the buckle base 1122 away from the mounting platform 111. The mounting platform 111 has a radial dimension greater than that of the buckle base 1122. This arrangement ensures that the mounting platform 111, when mounted within the through hole 31, can engage with the retaining hole section 311 of the through hole 31, thereby reliably preventing the mounting member 11 from exiting the through hole 31 in a direction toward the coupling member 12.

[0051] Based on this, the coupling adjustment structure 10 provided in the embodiment of the present application can first align the mounting member 11 to the corresponding through hole 31 during assembly, and then apply pressing force to the mounting member 11 so that the mounting member 11 is inserted into the through hole 31 and the buckle 112 adaptively elastically shrinks and deforms until the buckle protrusion 1121 passes through the through hole 31. After the buckle protrusion 1121 passes through the through hole 31, the buckle 112 is reset from the contracted state, and the buckle protrusion 1121 is buckled to the edge of the through hole 31. At this time, a snap fit is formed between the buckle protrusion 1121 and the edge of the through hole 31, which can effectively limit the mounting member 11 from falling out of the through hole in the direction away from the coupling member 12. The through hole 31 is provided with a plurality of holes 31, and the cooperation between the mounting platform 111 and the through hole 31 can effectively limit the mounting member 11 from escaping from the through hole 31 in the direction close to the coupling member 12, so that the mounting member 11 can be stably rotatably installed in the through hole 31 in an inverted installation manner, and the axial position of the mounting member 11 and the coupling member 12 connected to the mounting member 11 relative to the through hole 31 can be stabilized, and the external force can be allowed to drive the mounting member 11 to rotate in the through hole 31 and drive the coupling member 12 to rotate synchronously, thereby effectively simplifying and facilitating the assembly operation of the coupling adjustment structure 10, and effectively ensuring and improving the assembly convenience and efficiency of the coupling adjustment structure 10.

[0052] The coupling adjustment structure 10 provided in the embodiments of the present application is particularly applicable to filters. Specifically, as Figure 5 shown, in one implementation of the coupling adjustment structure 10, the coupling adjustment structure 10 can be correspondingly arranged between two adjacent and coupled resonant rods 40 to serve as a coupling rod 13. At this time, by rotating the coupling adjustment structure 10, the coupling area of the coupling member 12 relative to the two resonant rods 40 can be changed, so as to adjust the coupling strength between the two resonant rods 40. As Figure 10 shown, in another implementation of the coupling adjustment structure 10, the coupling adjustment structure 10 can be correspondingly arranged at the coupling window 21 to serve as a flying rod 14, so as to form a cross-coupling between the two resonant rods 40 separately arranged on both sides of the coupling window 21. At this time, by rotating the coupling adjustment structure 10, the coupling area of the coupling member 12 relative to the two resonant rods 40 on both sides of the coupling window 21 can be changed, so as to realize debugging the out-of-band suppression of the passband and adjust the transmission zero point of the filter channel. Thus, the coupling adjustment structure 10 provided in this embodiment can be used to adjust the coupling strength or can be used to debug the out-of-band suppression of the passband, and has excellent usability and wide applicability.

[0053] At the same time, because such a structure is simple and reduces components such as nuts and screws, therefore, for the filter using the coupling adjustment structure 10 provided in the embodiments of the present application, it can avoid the coupling adjustment structure 10 occupying too much extra space of the filter, which is beneficial to the miniaturization of the filter.

[0054] Moreover, corresponding to the structural design of the coupling adjustment structure 10 provided in this embodiment, the filter housing for installing the coupling adjustment structure 10 needs to be provided with a through hole 31, but there is no need to thread the hole as in the prior art, so as to effectively simplify the processing difficulty and accuracy requirements of the filter housing, effectively reduce the processing cost of the filter housing, and effectively improve the processing efficiency of the filter housing.

[0055] Moreover, compared with the prior art, when the coupling adjustment structure 10 of this embodiment rotates relative to the through hole 31, it can reduce or even basically avoid the risk of scraping with the hole wall of the through hole 31 and generating burrs, debris, etc. falling into the filter interior, so as to effectively guarantee and improve the intermodulation and power performance of the filter.

[0056] Among them, as Figure 1 shown, the coupling member 12 is in the shape of a rectangular sheet. By setting it like this, the coupling member 12 can be relatively miniaturized. Of course, in other possible implementations, the coupling member 12 can be in the shape of a mountain-shaped sheet, a 冂-shaped sheet, an irregular sheet, an irregular column, or other shapes, as long as it is ensured that the coupling member 12 can change the coupling area relative to the two resonant rods 40 during rotation to achieve adjustment. Among them, as Figure 3As shown, when the coupling member 12 is in a mountain-shaped sheet or a U-shaped sheet, the coupling piece design on the opposite sides of the coupling member 12 can correspondingly increase the coupling strength.

[0057] Among them, the coupling member 12 can be coaxially connected to the mounting member 11, and the rotation axes of the coupling member 12 and the mounting member 11 are set to coincide, so that the rotation amplitude of the coupling member 12 can be precisely controlled by the rotation amplitude of the mounting member 11 to precisely control the adjustment amount.

[0058] Please refer to Figure 1 、 Figure 2 、 Figure 6 In this embodiment, a first conical surface 1111 is provided on one side of the mounting table 111 close to the buckle 112, and the radial dimension of the first conical surface 1111 is tapered in the direction close to the coupling member 12.

[0059] Based on the setting of this embodiment, even if there are machining tolerances in the mounting member 11 and / or the through hole 31, when the mounting member 11 is rotationally installed in the through hole 31, the mounting table 111 of the mounting member 11 can be adaptively fitted with the tapered limiting hole section 311 corresponding to the through hole 31 based on its first conical surface 1111, absorb the machining tolerances, and achieve a tight fit. For example, when there is a positive tolerance in the radial dimension of the mounting table 111, that is, the radial dimension of the mounting table 111 is larger than the standard dimension, the mounting table 111 can be adaptively fitted with the region where the radial dimension of the tapered limiting hole section 311 corresponding to the through hole 31 is larger based on its first conical surface 1111; when there is a negative tolerance in the radial dimension of the mounting table 111, that is, the radial dimension of the mounting table 111 is smaller than the standard dimension, the mounting table 111 can be adaptively fitted with the region where the radial dimension of the tapered limiting hole section 311 corresponding to the through hole 31 is smaller based on its first conical surface 1111.

[0060] Therefore, by adopting the above solution, the allowable machining tolerances of the mounting member 11 and the through hole 31 can be relatively enlarged, the tolerance control requirements for the mounting member 11 and the through hole 31 can be effectively reduced, the machining difficulty and the fitting difficulty between the coupling adjustment structure 10 and the through hole 31 can be reduced, the assembly passing rate between the coupling adjustment structure 10 and the through hole 31 can be improved, and the assembly between the mounting member 11 and the through hole 31 can be made more simple and faster. Moreover, based on the adaptive fit between the mounting table 111 and the through hole 31, the locking force between the coupling adjustment structure 10 and the through hole 31 can be ensured and improved, and further, the axial position stability and state stability of the coupling adjustment structure 10 after being installed in the through hole 31 can be ensured and improved.

[0061] Please refer to Figure 1 、 Figure 2 、 Figure 6In this embodiment, the buckle 112 is annular. Based on this configuration, when the mounting member 11 is rotatably mounted in the through hole 31 in an inverted mounting manner, the buckle base 1122 of the buckle 112 can be rotatably engaged in the through hole 31 in an annular form, and the buckle protrusion 1121 of the buckle 112 can be buckled in an annular form to the edge of the through hole 31. Based on this, the rotational stability of the mounting member 11 in the through hole 31 can be guaranteed and improved, and the buckling engagement area between the buckle protrusion 1121 and the edge of the through hole 31 can be expanded, making the engagement between the buckle protrusion 1121 and the edge of the through hole 31 more stable and reliable.

[0062] In this embodiment, the buckle 112 is provided with at least one truncation groove 1124 in the circumferential direction, and the truncation groove 1124 at least truncates a portion of the buckle base 1122 and the buckle protrusion 1121. Based on this configuration, during the assembly of the mounting member 11, the complete continuity of the buckle 112 in the circumferential direction can be truncated, and the truncation groove 1124 can be used to provide partial deformation space for the buckle 112, thereby reducing the resistance of the buckle 112 to inward contraction and deformation, and facilitating the buckle 112 to adaptively contract and deform in the corresponding hole section of the through hole 31. Furthermore, on the basis of ensuring and improving the reliability of the fit between the buckle protrusion 1121 and the hole edge of the through hole 31 and the rotational stability of the mounting member 11 in the through hole 31, the assembly convenience and efficiency of the mounting member 11 and the coupling adjustment structure 10 can be ensured and improved.

[0063] This embodiment does not limit the specific number of truncation grooves 1124, the specific location of the truncation grooves 1124 around the buckle 112, or the specific shape of the truncation grooves 1124. Preferably, there are at least two truncation grooves 1124, and the multiple truncation grooves 1124 are distributed in a circular array around the buckle 112. This arrangement can balance the structural strength of the buckle 112 along all sides of the circumference and even the deformation amplitude of the buckle 112 along all sides of the circumference when the buckle 112 undergoes adaptive contraction deformation.

[0064] The depth of the truncation groove 1124 is less than the axial length of the buckle 112. This configuration allows the portion of the buckle 112 near the mounting platform 111 to retain a complete annular shape. This reduces the resistance to inward contraction and deformation of the buckle 112, facilitates adaptive contraction and deformation of the buckle 112 in the corresponding hole section of the through hole 31, and simultaneously ensures and improves the structural strength of the portion of the buckle 112 near the mounting platform 111, ensures and improves the connection strength between the portion of the buckle 112 near the mounting platform 111 and the mounting platform 111, and ensures and improves the support strength of the portion of the buckle 112 near the mounting platform 111 for the portion of the buckle 112 truncation by the truncation groove 1124, thereby ensuring and extending the service life of the buckle 112.

[0065] See also Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the mounting member 11 further includes an extension body 113 connected to the mounting platform 111 and extending in a direction approaching the coupling member 12. Thus, the extension body 113 can enhance the overall structural strength of the mounting member 11, connect the coupling member 12 via the extension body 113 to strengthen the connection strength and support strength of the coupling member 12, and extend the overall axial length of the mounting member 11 via the extension body 113 to ensure that the axial position of the coupling member 12 relative to the through hole 31 is appropriate, ensuring that the coupling member 12 can reliably perform its adjustment function.

[0066] Among them, the outer periphery of the extension body 113 and the inner periphery of the buckle 112 are spaced apart. Based on this, a deformation space can be reserved between the extension body 113 and the buckle 112 for the buckle 112 to shrink and deform inward, so as to reduce the resistance of the buckle 112 to shrink and deform inward, and facilitate the buckle 112 to adaptively shrink and deform in the corresponding hole section of the through hole 31.

[0067] See also Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the side of the mounting member 11 away from the coupling member 12 is lower than or flush with the opening of the through hole 31. In other words, the side of the mounting member 11 away from the coupling member 12 does not protrude from the opening of the through hole 31.

[0068] By adopting the above scheme, when the coupling adjustment structure 10 is applied to communication products such as filters, duplexers, combiners, antennas, and installed in the through hole 31, by making the side of the mounting member 11 away from the coupling member 12 lower than or flush with the opening of the through hole 31, the outer side of the shell of the filter and other products with the through hole 31 can be made simple and beautiful, and the mounting member 11 can be basically avoided from colliding with other structures and affecting product indicators when the filter and other products are assembled with other structures. The overall height of the filter and other products can be reduced, which is conducive to the miniaturization and lightweight of the filter and other products. On the premise that the installation space reserved for the filter and other products remains unchanged, the configurable volume of the filter and other products can be expanded and the performance indicators of the filter and other products can be improved.

[0069] See also Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the coupling member 12 does not protrude from the buckle 112 in the circumferential direction.

[0070] By adopting the above solution, it is convenient to pre-connect the coupling member 12 to the mounting member 11 to form a modular coupling adjustment structure 10, and then quickly and conveniently install the entire coupling adjustment structure 10 into the through hole 31. Specifically, when assembling the coupling adjustment structure 10, the coupling member 12 can be first passed through the through hole 31, and then a pressing force is applied to the mounting member 11, so that the mounting member 11 is inserted into the through hole 31 and the buckle 112 adaptively contracts and deforms until the buckle protrusion 1121 passes through the through hole 31. The buckle 112 then returns from the contracted state, and the buckle protrusion 1121 engages with the edge of the through hole 31, thereby quickly and conveniently installing the entire coupling adjustment structure 10 into the through hole 31. Therefore, compared with the embodiment in which the mounting member 11 is first installed into the through hole 31 and then the coupling member 12 is connected to the mounting member 11, this embodiment can further improve the assembly convenience and efficiency of the coupling adjustment structure 10.

[0071] See also Figure 1 、 Figure 2 In this embodiment, an adjustment slot 114 is defined on the end surface of the mounting member 11 away from the coupling member 12. The adjustment slot 114 is configured to allow an external tool to drive the mounting member 11 to rotate. The adjustment slot 114 may be, but is not limited to, a cross slot, a plus-minus slot, a slotted slot, an inner triangular slot, an inner hexagonal slot, a plum blossom slot, a plum blossom slotted slot, and the like, and this embodiment does not impose any restrictions thereto.

[0072] By adopting the above solution, when the coupling adjustment structure 10 needs to be rotated, an external tool such as a screwdriver or an Allen wrench can be inserted into the adjustment slot 114 to apply force and drive the mounting member 11 and the coupling member 12 to rotate synchronously to achieve the adjustment purpose.

[0073] See also Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the coupling member 12 is a metal member. This configuration ensures that the coupling member 12 can reliably perform the coupling function.

[0074] In this embodiment, mounting member 11 can be a metal member or an insulating member. Whether mounting member 11 is metal or insulating depends on the specifications. When mounting member 11 is an insulating member, the material of mounting member 11 can be, but is not limited to, plastic. Mounting member 11 can secure coupling member 12 and drive coupling member 12 to rotate synchronously therewith. When mounting member 11 is a metal member, mounting member 11 not only secures coupling member 12 and drives coupling member 12 to rotate synchronously therewith, but also cooperates with coupling member 12 to achieve a coupling effect.

[0075] See also Figure 4 、 Figure 5 、 Figure 6The embodiment of the present application also provides a filter, including a cavity 20, a cover plate 30 covering the cavity 20, a plurality of resonant rods 40 arranged in the cavity 20, and at least one coupling adjustment structure 10; each resonant rod 40 is installed in the cavity 20, and the cover plate 30 is provided with a through hole 31 for installing the coupling adjustment structure 10.

[0076] It should be noted that the cavity 20 has a resonant cavity 22 , and a resonant rod 40 is provided in the resonant cavity 22 . The resonant rod 40 is connected to the cavity 20 and is disposed opposite to and corresponding to the cover plate 30 .

[0077] The resonant rod 40 may be connected to the cavity 20 by integral connection, riveting, crimping, screw fastening, threaded connection, welding, clamping, etc., and this embodiment does not impose any restrictions on this.

[0078] The resonant rod 40 may be a hollow resonant rod or a solid resonant rod, which is not limited in this embodiment.

[0079] The resonant rod 40 may be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made of other materials, which is not limited in this embodiment.

[0080] The resonant rod 40 may be a circular rod, a polygonal rod, a special-shaped rod or even other shapes, which is not limited in this embodiment.

[0081] The resonant rod 40 may be provided with a resonant disk 41 or without the resonant disk 41 , and the resonant disk 41 may be provided with a flange 42 or without the flange 42 , which is not limited in this embodiment.

[0082] It should also be noted here that a through hole 31 is provided on the cover plate 30, which is arranged one-to-one with the coupling adjustment structure 10 and is used to install the coupling adjustment structure 10. The coupling adjustment structure 10 can be rotatably installed in the through hole 31 in an inverted installation manner, and the adjustment effect is exerted through the rotation of the coupling member 12.

[0083] See also Figure 4 、 Figure 5 、 Figure 6 In this embodiment, at least one coupling adjustment structure 10 is disposed between two adjacent resonant rods 40 and is used to adjust the coupling strength between the two adjacent resonant rods 40 .

[0084] Specifically, the coupling adjustment structure 10 can be set between two adjacent resonant rods 40 to serve as a coupling rod 13. At this time, the coupling adjustment structure 10 can be rotated to change the coupling area between the coupling member 12 relative to the two resonant rods 40, thereby adjusting the coupling strength between the two resonant rods 40.

[0085] Example 2

[0086] See also Figure 7 In this embodiment, a second conical surface 1123 is provided on a side of the snap-fit ​​protrusion 1121 close to the mounting platform 111 , and a radial dimension of the second conical surface 1123 is gradually reduced in a direction away from the coupling member 12 .

[0087] Based on the configuration of this embodiment, even if machining tolerances exist in the mounting member 11 and / or the through hole 31, when the mounting member 11 is rotated and mounted in the through hole 31 in an undercut mounting manner, the snap protrusion 1121 of the snap 112 can adaptively engage with the corresponding edge of the through hole 31 based on its second tapered surface 1123, thereby absorbing the machining tolerances and achieving a tight snap fit. For example, when the axial dimension of the snap 112 has a positive tolerance, i.e., the axial dimension of the snap 112 is longer than the standard dimension, the snap protrusion 1121 can adaptively engage with the edge of the through hole 31 at a location where the radial dimension of its second tapered surface 1123 is smaller. When the axial dimension of the snap 112 has a negative tolerance, i.e., the axial dimension of the snap 112 is shorter than the standard dimension, the snap protrusion 1121 can adaptively engage with the edge of the through hole 31 at a location where the radial dimension of its second tapered surface 1123 is larger.

[0088] Therefore, by adopting the above solution, the allowable machining tolerances of the mounting member 11 and the through hole 31 can be relatively expanded, effectively reducing the tolerance control requirements for the mounting member 11 and the through hole 31, thereby reducing the machining and mating difficulty of the coupling adjustment structure 10 and the through hole 31, improving the assembly pass rate between the coupling adjustment structure 10 and the through hole 31, and making the assembly between the mounting member 11 and the through hole 31 simpler and faster. Furthermore, based on the adaptive snap fit between the snap protrusion 1121 and the edge of the through hole 31, the locking force between the coupling adjustment structure 10 and the through hole 31 can be guaranteed and improved, thereby ensuring and improving the axial position stability and state stability of the coupling adjustment structure 10 after being installed in the through hole 31.

[0089] Furthermore, by adopting the above-described solution, during assembly, the second tapered surface 1123 can be guided and engaged with the rim of the through-hole 31, making it easier for the snap protrusion 1121 to pass through the through-hole 31 and engage with the rim of the through-hole 31, thereby ensuring and improving the assembly convenience and efficiency of the coupling adjustment structure 10. Conversely, during disassembly, the second tapered surface 1123 can be guided and engaged with the rim of the through-hole 31, making it easier for the snap 112 to adaptively elastically contract and deform and exit the through-hole 31, thereby ensuring and improving the disassembly convenience and efficiency of the coupling adjustment structure 10, and facilitating subsequent repair and replacement of the coupling adjustment structure 10.

[0090] Example 3

[0091] The difference between this embodiment and the first embodiment is that:

[0092] See also Figure 8In this embodiment, the coupling member 12 is directly connected to the mounting platform 111. Based on this, compared to the first embodiment, the extension body 113 can be omitted in this embodiment, and the coupling member 12 can be directly connected to the mounting platform 111. This ensures the supporting strength of the mounting platform 111 for the coupling member 12 and the adjustment function of the coupling member 12. The portion of the coupling member 12 corresponding to the buckle 112 is spaced apart from the inner periphery of the buckle 112. Therefore, a deformation space is reserved between the portion of the coupling member 12 corresponding to the buckle 112 and the buckle 112 for the buckle 112 to shrink and deform inwardly, thereby reducing the resistance to the buckle 112 shrinking and deforming inwardly and facilitating the buckle 112 to adaptively shrink and deform in the corresponding hole section of the through hole 31.

[0093] Example 4

[0094] Please refer to Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the mounting member 11 is separately connected to the coupling member 12. The separate connection between the mounting member 11 and the coupling member 12 can be achieved by, but not limited to, bonding, welding, plugging, clamping, or pressing.

[0095] By utilizing a separate connection between the mounting member 11 and the coupling member 12, the assembly process between the mounting member 11 and the through hole 31, as well as the sequence of the assembly process between the mounting member 11 and the coupling member 12, can be adjusted flexibly and on demand, while ensuring the connection strength between the two members. This further ensures and improves the ease of assembly of the mounting member 11, the coupling member 12, and the through hole 31. In particular, when the mounting member 11 is an insulating member, the use of a separate connection can reduce injection molding costs. In particular, when using a detachable connection such as a plug-in or snap-on connection, the choice of coupling member 12 can be flexibly adjusted, allowing different coupling members 12 to be selected and replaced as needed.

[0096] Example 5

[0097] The difference between this embodiment and the fourth embodiment is that:

[0098] See also Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the mounting member 11 and the coupling member 12 are integrally connected.

[0099] By integrally connecting the mounting member 11 and the coupling member 12, the connection strength between the mounting member 11 and the coupling member 12 can be effectively guaranteed and strengthened, thereby guaranteeing and improving the performance of the coupling adjustment structure 10 and guaranteeing and extending the service life of the coupling adjustment structure 10.

[0100] When the mounting member 11 and the coupling member 12 are metal members, the mounting member 11 and the coupling member 12 can be integrally formed to achieve an integral connection. When the mounting member 11 and / or the coupling member 12 are insulating members, the mounting member 11 and the coupling member 12 can be integrally connected by injection molding, overmolding, or the like.

[0101] Example 6

[0102] The difference between this embodiment and the first embodiment is that:

[0103] Please refer to Figure 1 、 Figure 2 、 Figure 6 In this embodiment, the mounting member 11 and the coupling member 12 are both insulating members, and a portion or the entirety of the coupling member 12 is covered with a metal layer.

[0104] By adopting the above solution, the mounting member 11 can fix the coupling member 12 and drive the coupling member 12 to rotate synchronously therewith, while the metal-coated portion of the coupling member 12 plays a coupling role.

[0105] Compared with the first embodiment, this embodiment significantly reduces the cost of the coupling adjustment structure 10 , but also slightly reduces the performance index of the coupling adjustment structure 10 .

[0106] The mounting member 11 may also be partially or fully coated with a metal layer. In this case, the metal-coated portion of the mounting member 11 can cooperate with the metal-coated portion of the coupling member 12 to achieve a coupling effect. The mounting member 11 may also not be coated with a metal layer. This embodiment is not limited to this.

[0107] Example 7

[0108] The difference between this embodiment and the first embodiment is that:

[0109] Please refer to Figure 4 、 Figure 5 、 Figure 6 An embodiment of the present application also provides a filter, including a cavity 20, a cover plate 30 covering the cavity 20, a plurality of resonant rods 40 arranged in the cavity 20, and at least one coupling adjustment structure 10; each resonant rod 40 is installed on the cover plate 30, and the cavity 20 is provided with a through hole 31 for installing the coupling adjustment structure 10.

[0110] It should be noted that the cavity 20 has a resonant cavity 22 , a resonant rod 40 is provided in the resonant cavity 22 , and the resonant rod 40 is connected to the side of the cover plate 30 facing the cavity 20 .

[0111] The resonant rod 40 may be connected to the cover plate 30 by means of integral connection, riveting, crimping, screw fastening, threaded connection, welding, clamping, etc., and this embodiment does not impose any restrictions on this.

[0112] The resonant rod 40 may be a hollow resonant rod or a solid resonant rod, which is not limited in this embodiment.

[0113] The resonant rod 40 may be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made of other materials, which is not limited in this embodiment.

[0114] The resonant rod 40 may be a circular rod, a polygonal rod, a special-shaped rod or even other shapes, which is not limited in this embodiment.

[0115] The resonant rod 40 may be provided with a resonant disk 41 or without the resonant disk 41 , and the resonant disk 41 may be provided with a flange 42 or without the flange 42 , which is not limited in this embodiment.

[0116] It should also be noted here that a through hole 31 is provided on the cavity 20, which is arranged in a one-to-one correspondence with the coupling adjustment structure 10 and is used to install the coupling adjustment structure 10. The coupling adjustment structure 10 can be rotatably installed in the through hole 31 in an inverted installation manner, and the adjustment effect is exerted through the rotation of the coupling member 12.

[0117] Example 8

[0118] See also Figure 9 、 Figure 10 In this embodiment, the cavity 20 has a coupling window 21 , and the coupling adjustment structure 10 is disposed in the coupling window 21 and is used to adjust the passband out-of-band suppression.

[0119] Specifically, the coupling adjustment structure 10 can be set at the coupling window 21 to serve as a flying rod 14, so that cross coupling is formed between the two resonant rods 40 arranged on both sides of the coupling window 21. At this time, the coupling adjustment structure 10 can be rotated to change the coupling area of ​​the coupling member 12 relative to the two resonant rods 40 on both sides of the coupling window 21, thereby achieving the debugging of the passband out-of-band suppression and the adjustment of the transmission zero point of the filter channel.

[0120] When the filter is provided with multiple coupling adjustment structures 10, all coupling adjustment structures 10 may be used to adjust the coupling strength, all coupling adjustment structures 10 may be used to adjust the passband out-of-band suppression, or some coupling adjustment structures 10 may be used to adjust the coupling strength and some coupling adjustment structures 10 may be used to adjust the passband out-of-band suppression. This embodiment does not impose any limitation on this.

[0121] Embodiment 9

[0122] See also Figure 11 , and refer to Figure 5 In this embodiment, the cover plate 30 or the cavity 20 with the through hole 31 is provided with a recessed groove 32 on one side of the through hole 31 corresponding to the snap protrusion 1121 .

[0123] By adopting the above-mentioned scheme, the thickness of the cover plate 30 or the cavity 20 in the area where the through hole 31 is set can be relatively thinned by setting the sinking groove 32. Based on this, the extension length of the buckle base 1122 of the buckle 112 can be shortened, and the contact area between the buckle protrusion 1121 and the edge of the through hole 31 can be increased, which is beneficial to ensuring and improving the structural strength of the buckle 112, and ensuring and improving the buckling strength between the buckle 112 and the edge of the through hole 31.

[0124] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements or 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 coupling adjustment structure, characterized in that: The invention comprises a mounting member and a coupling member connected to one end of the mounting member, the mounting member comprises a mounting platform and a buckle connected to the mounting platform on a side close to the coupling member, the mounting platform is rotatably mounted on and axially limited in a through hole, limiting the mounting member from being disengaged from the through hole in a direction close to the coupling member, the buckle comprises a buckle base extending in a direction close to the coupling member and rotatably mounted on the through hole, and a buckle protrusion connected to one end of the buckle base away from the mounting platform and protruding outward, the buckle protrusion is buckled to the edge of the through hole, limiting the mounting member from being disengaged from the through hole in a direction away from the coupling member.

2. The coupling adjustment structure according to claim 1, wherein: A first conical surface is provided on a side of the mounting platform close to the buckle, and a radial dimension of the first conical surface is gradually reduced in a direction close to the coupling member; And / or, a second conical surface is provided on a side of the snap-fit ​​protrusion close to the mounting platform, and a radial dimension of the second conical surface is gradually reduced in a direction away from the coupling member.

3. The coupling adjustment structure according to claim 1, wherein: The buckle is arranged in an annular shape, and is provided with at least one truncation groove in the circumferential direction of the buckle.

4. The coupling adjustment structure according to claim 1, wherein: The mounting member further includes an extension body connected to the mounting platform and extending in a direction close to the coupling member, and the outer periphery of the extension body is spaced apart from the inner periphery of the buckle.

5. The coupling adjustment structure according to claim 1, wherein: The side of the mounting member away from the coupling member is lower than or flush with the opening of the through hole.

6. The coupling adjustment structure according to any one of claims 1 to 5, characterized in that: The mounting member is connected to the coupling member separately or integrally; And / or, an adjustment groove is formed on an end surface of the mounting member away from the coupling member, and the adjustment groove is used for an external tool to drive the mounting member to rotate.

7. The coupling adjustment structure according to any one of claims 1 to 5, characterized in that: The mounting member is an insulating member, and the coupling member is a metal member; Alternatively, the mounting member and the coupling member are both metal members; Alternatively, the mounting member and the coupling member are both insulating members, and a portion or the entirety of the coupling member is covered with a metal layer.

8. A filter, characterized in that: The invention comprises a cavity, a cover plate covering the cavity, a plurality of resonant rods arranged in the cavity, and at least one coupling adjustment structure according to any one of claims 1 to 7; Each of the resonant rods is mounted on the cavity, and the cover plate is provided with the through hole for mounting the coupling adjustment structure; or each of the resonant rods is mounted on the cover plate, and the cavity is provided with the through hole for mounting the coupling adjustment structure.

9. The filter according to claim 8, wherein At least one coupling adjustment structure is provided between two adjacent resonant rods and is used to adjust the coupling strength between the two adjacent resonant rods; And / or, the number of the resonant rods is at least three, the cavity has a coupling window, and the coupling adjustment structure is provided in the coupling window and is used to adjust the passband out-of-band suppression.

10. The filter according to claim 8, wherein The cover plate or the cavity is provided with a recessed groove on one side of the through hole corresponding to the buckle protrusion.

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