Coupling adjustment structure and filter

Abstract

The utility model relates to the field of radio frequency devices, and provides a coupling adjustment structure and a filter. The coupling adjusting structure comprises a mounting piece rotationally mounted in the through hole and a coupling piece connected to one end of the mounting piece, the mounting piece is an insulating piece, a blind hole is formed in the end, away from the coupling piece, of the mounting piece, the end, close to the coupling piece, of the blind hole protrudes out of the corresponding end of the through hole, and the blind hole is used for allowing an external monitoring piece to be inserted therein to monitor and debug the waveform. The coupling adjusting structure can allow the external monitoring part to be inserted in through the blind hole during debugging, so that an external monitoring instrument can monitor the debugging waveform through the external monitoring part, and whether the debugging waveform is large relative to the expected deviation or not can be conveniently determined. If the variation amplitude of the debugging waveform is larger than the expected deviation, it can be determined that the debugging effect of the coupling adjustment structure is difficult to compensate for the coupling deviation, and in this case, the debugging operation can be paused in time, and the size of the filter shell can be corrected in time, so that the debugging time consumption can be reduced, and the debugging effect and the debugging efficiency can be improved.

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] In some cases, the filter includes a filter housing, a resonant rod disposed in the filter housing, and a coupling adjustment structure rotatably mounted on a through hole. The coupling adjustment structure can adjust the coupling amount between the two resonant rods by rotating relative to the through hole.

[0003] However, the coupling adjustment structure has a small adjustable range of the coupling amount. During debugging, the debugging effect of the coupling adjustment structure may be difficult to achieve the expected result due to the large processing error of the filter housing, resulting in a long debugging time and low debugging efficiency. Utility Model Content

[0004] The embodiments of the present application provide a coupling adjustment structure and a filter, aiming to solve the problem that the debugging effect of the coupling adjustment structure may be difficult to achieve the expected result due to large processing errors of the filter housing, resulting in long debugging time and low debugging efficiency.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] In the first aspect, a coupling adjustment structure is provided, including a mounting member rotatably mounted on a through hole, and a coupling member connected to one end of the mounting member, wherein the mounting member is an insulating member, and a blind hole is provided at one end of the mounting member away from the coupling member, and an end of the blind hole close to the coupling member protrudes from the corresponding end of the through hole, and the blind hole is used for an external monitoring member to be inserted therein to monitor the debugging waveform.

[0007] In some embodiments, the mounting member is an insulating member, and one end of the blind hole close to the coupling member protrudes out from a corresponding end of the through hole.

[0008] In some embodiments, the blind hole is disposed at the central axis of the mounting member.

[0009] In some embodiments, the blind hole is a circular hole.

[0010] In some embodiments, an adjustment groove is provided at one end 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.

[0011] In some embodiments, a portion of the blind hole is arranged to overlap with the adjustment groove.

[0012] In some embodiments, the mounting member is buckled into the through hole.

[0013] In some embodiments, the mounting member includes a mounting portion and a stop portion connected in sequence, the mounting portion is rotatably mounted on the through hole, a snap protrusion is provided on the outer periphery of the mounting portion, the snap protrusion is snapped to the edge of the through hole, the stop portion at least partially protrudes from the mounting portion in the circumferential direction, and the stop portion stops at the edge of the through hole.

[0014] In some embodiments, the blind hole extends from the mounting portion to the stop portion.

[0015] In some embodiments, the snap protrusion is an annular structure extending along the circumference of the mounting portion, and the mounting portion is provided with an adjustment groove, at least a portion of the adjustment groove is extended and penetrated along the radial direction of the mounting portion, and cuts off the snap protrusion.

[0016] In a second aspect, a filter is provided, comprising a filter housing, a plurality of resonant rods, and at least one coupling adjustment structure provided in an embodiment of the present application, wherein the filter housing has a first plate member and a second plate member arranged opposite to each other, the resonant rods are arranged in the filter housing and mounted on the first plate member, and the second plate member is provided with the through hole for mounting the coupling adjustment structure.

[0017] In some embodiments, at least one coupling adjustment structure is disposed between two adjacent resonant rods and is used to adjust the coupling strength between the two adjacent resonant rods.

[0018] In some embodiments, the number of the resonant rods is at least three, the filter housing has a coupling window, the coupling adjustment structure is disposed in the coupling window, and is used to adjust the passband out-of-band suppression.

[0019] The beneficial effects of the coupling adjustment structure provided by the present application are:

[0020] The coupling adjustment structure provided in the embodiment of the present application can be inserted into the blind hole at one end of the mounting part away from the coupling part during debugging, so that the external monitoring part can be connected to the external monitoring part signal to monitor the debugging waveform through the external monitoring part, so as to facilitate the determination of whether the deviation of the debugging waveform is large relative to the expected value according to the change amplitude of the debugging waveform monitored by the external monitoring instrument. If the change amplitude of the debugging waveform is large relative to the expected deviation, it can be reflected that the coupling amount between the two resonant rods adjusted by the coupling adjustment structure is large relative to the expected deviation, which can reflect that the processing error and assembly error of the filter housing are large, and it can be determined that the debugging effect of the coupling adjustment structure is difficult to achieve the expected value and difficult to make up for the coupling amount deviation. In this case, the debugging operation of the coupling adjustment structure can be suspended in time, and the size of the filter housing can be corrected in time or even the filter housing can be replaced until the processing error and assembly error of the filter housing are reduced to the expected value, until the debugging effect of the coupling adjustment structure can achieve the expected value and can make up for the coupling amount deviation. In this way, the time spent on repeated debugging in the case where the debugging effect of the coupling adjustment structure is difficult to make up for the coupling amount deviation can be reduced, the debugging time can be reduced, and the debugging effect and debugging efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A three-dimensional schematic diagram of a coupling adjustment structure provided in some embodiments of the present application;

[0023] Figure 2 for Figure 1 A three-dimensional cross-sectional view of a coupling adjustment structure is provided;

[0024] Figure 3 A three-dimensional schematic diagram of a filter provided in some embodiments of the present application;

[0025] Figure 4 for Figure 3 A cross-sectional view of the filter provided;

[0026] Figure 5 for Figure 4 A magnified image of region A is provided;

[0027] Figure 6 A cross-sectional view of a filter provided in some other embodiments of the present application, wherein a coupling adjustment structure is provided in a coupling window and is used to adjust the passband out-of-band suppression.

[0028] Among them, the reference numerals in the figure are:

[0029] 10-coupling adjustment structure, 11-mounting piece, 111-blind hole, L-central axis of mounting piece, 112-adjusting groove, 113-mounting portion, 1131-snapping protrusion, 114-stop portion, 115-connecting portion; 12-coupling piece; 10a-coupling rod, 10b-flying rod; 20-filter housing, 21-first plate member, 22-second plate member, 221-through hole, 23-resonance cavity, 24-coupling window; 30-resonance rod. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clear and understandable, the application is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0031] In the description of the present 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 the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, "axial" refers to the extension direction of the central axis of the corresponding structure, "radial" refers to any direction of the corresponding structure passing through the central axis and perpendicular to the central axis, and "circumferential" refers to the circumferential direction of the ring formed by the outer peripheral surface of the corresponding structure.

[0035] As a radio frequency device, the filter can be used to select communication signals and filter out clutter or interference signals outside the frequency of the communication signal, and is widely used in the field of communication. In some cases, the filter includes a filter housing, a resonant rod disposed in the filter housing, and a coupling adjustment structure rotatably mounted on the through hole. The coupling adjustment structure can adjust the coupling amount between the two resonant rods by rotating relative to the through hole.

[0036] However, it is inevitable that there will be machining errors in the filter housing during the machining process. In the case of large machining errors (for example, large machining errors in the coupling window of the filter housing, or large machining errors in the coupling ribs, etc.), the coupling amount between the two resonant rods may deviate greatly from the initial design. The coupling adjustment structure has a small adjustable range for the coupling amount (i.e., the coupling adjustment structure is suitable for fine-tuning), resulting in that during the debugging period, the debugging effect of the coupling adjustment structure may be difficult to achieve the expected result due to the large machining errors of the filter housing (i.e., it is difficult to compensate for the coupling amount deviation through debugging), resulting in a long debugging time and low debugging efficiency.

[0037] Therefore, the embodiment of the present application provides a coupling adjustment structure to solve the problem that the debugging effect of the coupling adjustment structure may be difficult to achieve the expected result due to the large processing error of the filter housing, resulting in long debugging time and low debugging efficiency.

[0038] The specific implementation of this application is described in detail below in conjunction with specific embodiments:

[0039] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 Some embodiments of the present application provide a coupling adjustment structure 10, including a mounting member 11 rotatably mounted on a through hole 221, and a coupling member 12 connected to one end of the mounting member 11. The mounting member 11 is an insulating member. A blind hole 111 is provided at one end of the mounting member 11 away from the coupling member 12, and an end of the blind hole 111 close to the coupling member 12 protrudes from the corresponding end of the through hole 221. The blind hole 111 is used for an external monitoring member (not shown in the figure) to be inserted therein to monitor the debugging waveform.

[0040] It should be noted that the through hole 221 is a through hole 221 opened on the filter housing 20 and used for installing the coupling adjustment structure 10 .

[0041] The mounting member 11 is rotatably mounted in the through hole 221, so that the axial position of the coupling adjustment structure 10 relative to the through hole 221 is stable, and the mounting member 11 can drive the coupling member 12 connected thereto to rotate synchronously relative to the through hole 221 under the action of an external force. The mounting member 11 is an insulating member, and the material of the mounting member 11 can be, but is not limited to, plastic, plastic, etc. The mounting member 11 can play the role of fixing the coupling member 12 and driving the coupling member 12 to rotate synchronously therewith.

[0042] The coupling member 12 is a metal member; or, the coupling member 12 is an insulating member, but a metal layer covers part or all of the outer surface of the coupling member 12. The coupling member 12 can be used to play the coupling effect. The coupling member 12 is connected to one end of the mounting member 11 and can rotate synchronously with the mounting member 11. Among them, the coupling member 12 and the mounting member 11 can be integrally connected or separately connected. Among them, the coupling member 12 can be, but is not limited to, in the shape of a rectangular sheet, a mountain-shaped sheet, a 冂-shaped sheet, an irregular sheet, an irregular column, or other shapes. The present embodiment does not limit the structural shape of the coupling member 12, and the coupling member 12 only needs to satisfy the characteristic of "being able to change the coupling area relative to the two resonant rods 30 during rotation to achieve adjustment".

[0043] The coupling adjustment structure 10 provided in this embodiment is particularly applicable to filters. Specifically, as Figure 4 , Figure 5 shown, in an implementation manner of the coupling adjustment structure 10, the coupling adjustment structure 10 can be correspondingly arranged between two adjacent and coupled resonant rods 30 to serve as a coupling rod 10a. At this time, by rotating the coupling adjustment structure 10, the coupling area between the coupling member 12 and the two resonant rods 30 can be changed, so as to adjust the coupling strength between the two resonant rods 30. As Figure 6 shown, in another implementation manner of the coupling adjustment structure 10, the coupling adjustment structure 10 can be correspondingly arranged at the coupling window 24 to serve as a flying rod 10b, so as to form a cross-coupling between the two resonant rods 30 arranged on both sides of the coupling window 24. At this time, by rotating the coupling adjustment structure 10, the coupling area between the coupling member 12 and the two resonant rods 30 on both sides of the coupling window 24 can be changed, so as to realize the debugging of the out-of-band suppression of the passband and adjust the transmission zero point of the filter channel. Therefore, 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.

[0044] The coupling adjustment structure 10 provided in this embodiment has a simple structure, reduces components such as nuts and screws, can reduce the additional space occupied by the filter, and is conducive to the miniaturization of the filter.

[0045] The coupling adjustment structure 10 of this embodiment is suitable for installation in the through hole 221, and when rotating relative to the through hole 221, it can reduce the risk of scratching the hole wall of the through hole 221 and generating burrs, debris, etc. falling into the inside of the filter, thereby facilitating optimization of the intermodulation and power performance of the filter.

[0046] It should also be noted that a blind hole 111 is provided on the end surface of the mounting member 11 away from the coupling member 12, and the blind hole 111 does not penetrate the mounting member 11 along its extension direction. The blind hole 111 may be, but is not limited to, a circular hole, a rectangular hole, etc. The blind hole 111 is used for inserting an external monitoring member (such as a screw, a metal rod, a metal bar, a metal probe, etc.) therein, so that an external monitoring instrument (such as an oscilloscope, etc.) (not shown in the figure) can monitor the debugging waveform via the external monitoring member.

[0047] One end of the blind hole 111 close to the coupling member 12 protrudes from the corresponding end of the through hole 221 (i.e., one end of the through hole 221 close to the coupling member 12), so that the external monitoring member inserted in the blind hole 111 can extend out of the through hole 221, thereby allowing the external monitoring member to extend out of the wall of the filter housing 20 provided with the through hole 221, and to extend into the interior of the filter housing 20. Based on this, during the operation of the external monitoring member, the external monitoring member can be movably extended into the blind hole 111 along the hole depth direction of the blind hole 111, and the monitoring of the debugging waveform can be achieved by changing the depth of the blind hole 111. This makes it convenient for the external monitoring instrument to monitor the debugging waveform reliably, with less interference, and accurately through the external monitoring member.

[0048] Specifically, when the coupling adjustment structure 10 is used for a filter, during the debugging of the coupling adjustment structure 10 (used to adjust the coupling strength or to debug the passband out-of-band suppression), an external monitoring component can be inserted into the blind hole 111 to facilitate an external monitoring instrument connected to the signal of the external monitoring component to monitor the debugging waveform via the external monitoring component. According to the debugging waveform monitored by the external monitoring instrument, if the change amplitude of the debugging waveform is relatively large relative to the expected deviation, for example, the position representing the return loss and suppression on the waveform is relatively large relative to the expected deviation, it can be reflected that the coupling amount between the two resonant rods 30 adjusted by the coupling adjustment structure 10 is relatively large relative to the expected deviation, and it can be reflected that the processing error and assembly error of the filter housing 20 (for example, the assembly error between the filter housing 20 and the resonant rod 30) are large. It can be determined that the debugging effect of the coupling adjustment structure 10 is difficult to achieve the expected result. At this time, the debugging operation of the coupling adjustment structure 10 can be suspended in time, and the size of the filter housing 20 can be corrected (for example, the size of the coupling window 24 or the coupling rib (not shown in the figure) of the filter housing 20 can be modified), or even the filter housing 20 can be replaced until the processing error and assembly error of the filter housing 20 are small, until the debugging effect of the coupling adjustment structure 10 can achieve the expected result (that is, the debugging of the coupling adjustment structure 10 can make up for the coupling amount deviation). Thereby, it can be beneficial to improve the debugging effect and debugging efficiency, and it can be beneficial to compress the debugging time.

[0049] In summary, the coupling adjustment structure 10 provided in the embodiment of the present application can be provided with a blind hole 111 at one end of the mounting member 11 away from the coupling member 12 during debugging, so that the external monitoring member can be inserted therein, so that the external monitoring instrument connected to the signal of the external monitoring member can monitor the debugging waveform through the external monitoring member, thereby facilitating the determination of whether the deviation of the debugging waveform from the expected value is large according to the change amplitude of the debugging waveform monitored by the external monitoring instrument. If the change amplitude of the debugging waveform is large relative to the expected deviation, it can be reflected that the coupling amount between the two resonant rods 30 adjusted by the coupling adjustment structure 10 is large relative to the expected deviation, and it can be reflected that the processing error and assembly error of the filter housing 20 are large, and it can be determined that the debugging effect of the coupling adjustment structure 10 is difficult to achieve the expected result and it is difficult to make up for the coupling amount deviation. In this case, the debugging operation of the coupling adjustment structure 10 can be suspended in time, and the size of the filter housing 20 can be corrected in time or even the filter housing 20 can be replaced until the processing error and assembly error of the filter housing 20 are reduced to the expected value, until the debugging effect of the coupling adjustment structure 10 can achieve the expected result and the coupling amount deviation can be made up. Thus, the time spent on repeated debugging when the debugging effect of the coupling adjustment structure 10 is difficult to compensate for the coupling amount deviation can be reduced, the debugging time can be reduced, and the debugging effect and debugging efficiency can be improved.

[0050] Furthermore, by providing the blind hole 111 on the mounting member 11, the blind hole 111 is used for the external monitoring member to extend therein, and there is no need to provide a through hole structure for the external monitoring member to extend therein on the filter housing 20, and the external monitoring member does not need to be located beside the coupling adjustment structure 10, which can reduce the impact on the structure and coupling adjustment effect of the coupling adjustment structure 10, and can reduce the impact of the setting of the blind hole 111 on the sealing of the filter, especially the filter housing 20. Furthermore, the coupling adjustment structure 10 provided in this embodiment can be maintained in use after the debugging operation, without replacing the coupling adjustment structure 10 without the blind hole 111.

[0051] See also Figure 2 , Figure 4 , Figure 5 In some embodiments of the present application, the blind hole 111 is disposed at the center axis L of the mounting member 11 .

[0052] By adopting the above solution, by arranging the blind hole 111 at the central axis L of the mounting member 11, the position of the blind hole 111 relative to the mounting member 11 can be centered, and the position of the blind hole 111 relative to the coupling adjustment structure 10 can be centered. Based on this, the position of the blind hole 111 relative to the two resonant rods 30 adjusted by the coupling adjustment structure 10 can be optimized, and the risk of the blind hole 111 being more biased toward one of the resonant rods 30 relative to the coupling adjustment structure 10 can be reduced. In this way, the monitoring position of the external monitoring component inserted in the blind hole 111 can be optimized, and the external monitoring component can be conveniently and accurately perform waveform monitoring between the two resonant rods 30 adjusted by the coupling adjustment structure 10.

[0053] Furthermore, by arranging the blind hole 111 at the center axis L of the mounting member 11, the effect of the processing of the blind hole 111 on the strength of the coupling adjustment structure 10 can be balanced, the insertion pressure of the external monitoring member inserted into the blind hole 111 can be balanced, and the effect of the plugging and unplugging of the external monitoring member on the strength of the coupling adjustment structure 10 can be balanced, thereby helping to ensure and improve the structural strength and stability of the coupling adjustment structure 10, and helping to ensure and extend the service life of the coupling adjustment structure 10.

[0054] See also Figure 1 , Figure 2 In some embodiments of the present application, the blind hole 111 is a circular hole.

[0055] By adopting the above solution, by making the blind hole 111 a circular hole, the external monitoring component can be quickly and conveniently inserted into the blind hole 111 without too much alignment or positioning, thereby simplifying the plugging and unplugging of the external monitoring component, improving the plugging and unplugging convenience of the external monitoring component, compressing the monitoring time and debugging time, and improving the debugging effect and debugging efficiency. In addition, based on the isotropic characteristics of the circular hole, it is also convenient for the external monitoring component inserted in the blind hole 111 to realize reliable and accurate waveform monitoring in any direction.

[0056] Of course, in other embodiments, the blind hole 111 may be a rectangular hole or the like.

[0057] See also Figure 1 , Figure 2 , Figure 5 In some embodiments of the present application, an adjustment groove 112 is provided at one end of the mounting member 11 away from the coupling member 12, and the adjustment groove 112 is used for an external tool (not shown in the figure) to drive the mounting member 11 to rotate.

[0058] It should be noted that an adjustment slot 112 is provided on the end surface of the mounting member 11 away from the coupling member 12. The adjustment slot 112 may be, but is not limited to, a cross slot, a plus-minus slot, a straight slot, an inner triangular slot, an inner hexagonal slot, a plum blossom slot, a plum blossom straight slot, etc. The adjustment slot 112 can be used to allow an external tool (such as a screwdriver, an inner hexagonal wrench, etc.) to drive the mounting member 11 to rotate.

[0059] By adopting the above scheme, through the adjustment groove 112 provided at the end of the mounting member 11 away from the coupling member 12, an external tool such as a screwdriver or an Allen wrench can be inserted into the adjustment groove 112 to apply force and drive the mounting member 11 and the coupling member 12 to rotate synchronously, so that the coupling adjustment structure 10 can be rotated conveniently, quickly and labor-savingly, and the adjustment purpose can be achieved conveniently, quickly and accurately.

[0060] Of course, in other embodiments, the adjustment slot 112 may be omitted, and the coupling adjustment structure 10 may be driven to rotate directly through the exposed portion of the mounting member 11 or through the blind hole 111 to achieve the purpose of adjustment.

[0061] See also Figure 1 , Figure 2 In some embodiments of the present application, a portion of the blind hole 111 is arranged to overlap with the adjustment groove 112 .

[0062] It should be noted that a portion of the blind hole 111 is overlapped with the adjustment slot 112, that is, a portion of the blind hole 111 shares space with the adjustment slot 112. In some embodiments, the blind hole 111 is disposed at the center axis L of the mounting member 11, and the adjustment slot 112 is a straight slot, and the adjustment slot 112 extends through the blind hole 111, so that a portion of the blind hole 111 is overlapped with the adjustment slot 112.

[0063] By adopting the above scheme, by making a part of the blind hole 111 overlap with the adjustment groove 112, the part of the blind hole 111 and the adjustment groove 112 can share space, which can reduce the space occupied by the blind hole 111 and the adjustment groove 112 in the mounting member 11, and can facilitate the processing of the blind hole 111 and the adjustment groove 112 in the same area of ​​the mounting member 11. Based on this, the influence of the processing of the blind hole 111 and the adjustment groove 112 on the structural strength of the mounting member 11 can be reduced, and the strength loss and defects of the mounting member 11 can be reduced, so that the structural strength and stability of the coupling adjustment structure 10 can be guaranteed and improved, and the service life of the coupling adjustment structure 10 can be guaranteed and extended.

[0064] Of course, in other embodiments, the blind hole 111 and the adjustment slot 112 may be staggered.

[0065] See also Figure 1 , Figure 2 , Figure 5 In some embodiments of the present application, the mounting member 11 is buckled into the through hole 221 .

[0066] It should be noted that the mounting member 11 is buckled in the through hole 221, that is, the mounting member 11 is buckled and matched with the through hole 221. The mounting member 11 can be hooked in the through hole 221, or can be buckled in the through hole 221.

[0067] By adopting the above solution, by making the mounting member 11 buckle connected to the through hole 221, it is convenient to realize the stable rotation installation of the mounting member 11 in the through hole 221 by means of hanging buckle, inverted buckle, etc. Based on this, the axial position of the mounting member 11 and the coupling member 12 connected to the mounting member 11 relative to the through hole 221 can be stabilized, and the external force can also be allowed to drive the mounting member 11 to rotate in the through hole 221 and drive the coupling member 12 to rotate synchronously, thereby simplifying and facilitating the assembly operation of the coupling adjustment structure 10, and improving the assembly convenience and assembly efficiency of the coupling adjustment structure 10.

[0068] Of course, in other embodiments, the mounting member 11 may be rotatably mounted in the through hole 221 in other ways and have a stable axial position relative to the through hole 221. For example, the mounting member 11 may be rotatably mounted in the through hole 221 by flanging and riveting and have a stable axial position relative to the through hole 221.

[0069] See also Figure 1 , Figure 2 , Figure 5In some embodiments of the present application, the mounting member 11 includes a mounting portion 113 and a stop portion 114 connected in sequence, the mounting portion 113 is rotatably mounted on the through hole 221, a snap protrusion 1131 is provided on the outer periphery of the mounting portion 113, the snap protrusion 1131 is snapped to the edge of the through hole 221, the stop portion 114 at least partially protrudes from the mounting portion 113 in the circumferential direction, and the stop portion 114 stops at the edge of the through hole 221.

[0070] It should be noted that the mounting portion 113 is rotatably mounted in the through hole 221. The mounting portion 113 can be matched with the through hole 221, and such a configuration can improve the stability of the rotation of the mounting portion 113 in the through hole 221.

[0071] The outer periphery of the mounting portion 113 is provided with a buckle protrusion 1131, and one or more buckle protrusions 1131 can be provided. The buckle protrusion 1131 is provided at one end of the mounting portion 113 away from the stopper 114, and the buckle protrusion 1131 is buckled to the hole edge of the through hole 221 away from the stopper 114.

[0072] The stopper 114 at least partially protrudes from the mounting portion 113 in the circumferential direction, and the stopper 114 can be stopped at the edge of the through hole 221 close to the stopper 114 via the protruding portion. Figure 1 , Figure 2 As shown, in some embodiments, the outer shape of the stop portion 114 can be the same as the outer shape of the mounting portion 113, that is, both are circular. In this case, the radial dimension of the stop portion 114 can be larger than the radial dimension of the mounting portion 113, so that the stop portion 114 at least partially protrudes from the mounting portion 113 in the circumferential direction, so that the stop portion 114 can stop at the edge of the through hole 221. In other embodiments, the outer shape of the stop portion 114 may be different from the outer shape of the mounting portion 113. For example, the outer shape of the stop portion 114 may be rectangular, irregular, etc. In this case, the projection of the stop portion 114 in the axial direction of the mounting portion 113 may cover the projection of the mounting portion 113 in its own axial direction, that is, the outer dimensions of the stop portion 114 are larger than the outer dimensions of the mounting portion 113; or the projection of the stop portion 114 in the axial direction of the mounting portion 113 does not overlap with the projection of the mounting portion 113 in its own axial direction; in this way, the stop portion 114 can at least partially protrude from the mounting portion 113 in the circumferential direction, so that the stop portion 114 can stop at the edge of the through hole 221.

[0073] The blind hole 111 at least passes through the mounting portion 113 , so that one end of the blind hole 111 close to the coupling member 12 protrudes from the corresponding end of the through hole 221 , thereby facilitating the external monitoring member inserted in the blind hole 111 to extend out of the through hole 221 and into the interior of the filter housing 20 .

[0074] The mounting member 11 may be an integrally formed structure to simplify the connection operation of the mounting portion 113, the stopper portion 114 and other parts, improve the connection strength of the mounting portion 113, the stopper portion 114 and other parts, and improve the overall structural strength of the mounting member 11. Of course, in other embodiments, the mounting member 11 may be divided into multiple parts, and the parts may be connected separately, for example, the mounting portion 113 and the stopper portion 114 may be connected separately.

[0075] By adopting the above solution, during assembly, the coupling adjustment structure 10 can insert the mounting portion 113 into the through hole 221, and make the buckle protrusion 1131 on the outer periphery of the mounting portion 113 deform inward adaptively, until the buckle protrusion 1131 passes through the through hole 221 and resets from the deformed state under its own elastic action, and buckles with the hole edge of the through hole 221 away from the stopper 114. Based on this, it is convenient to stably rotate and install the mounting portion 113 in the through hole 221 in a hanging buckle installation manner. On this basis, the stopper 114 can also be combined with the stopper cooperation of the hole edge of the through hole 221 close to the stopper 114, so that the mounting member 11 and the through hole 221 can be limited on both sides in the axial direction, so that the axial position of the mounting member 11 and the coupling adjustment structure 10 relative to the through hole 221 can be stabilized. In this way, the assembly process of the coupling adjustment structure 10 can be simplified, the assembly efficiency of the coupling adjustment structure 10 can be improved, the connection convenience, connection reliability and connection stability between the coupling adjustment structure 10 and the through hole 221 can be improved, and the risk of the coupling adjustment structure 10 accidentally falling out of the through hole 221 can be reduced.

[0076] In some embodiments, the mounting member 11 may further include a connecting portion 115, which is connected to a side of the stopper 114 away from the mounting portion 113. The connecting portion 115 is used to mount the coupling member 12. Of course, in other embodiments, the connecting portion 115 may be omitted, and the coupling member 12 may be directly mounted on a side of the stopper 114 away from the mounting portion 113.

[0077] Of course, in other embodiments, the mounting member 11 may adopt other structural designs to be buckled in the through hole 221 , such as an undercut design.

[0078] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 In some embodiments of the present application, the blind hole 111 extends from the mounting portion 113 to the stopping portion 114 .

[0079] It should be noted that the blind hole 111 is formed on the end surface of the mounting portion 113 away from the stop portion 114, and the blind hole 111 extends from the mounting portion 113 to the stop portion 114 along its extension direction. Since the stop portion 114 stops at the edge of the through hole 221 close to the stop portion 114, the portion of the blind hole 111 extending to the stop portion 114 may protrude from the edge of the through hole 221 close to the stop portion 114.

[0080] By adopting the above solution, on the basis that the stopper 114 stops at the edge of the through hole 221 close to the stopper 114, by extending the blind hole 111 from the mounting portion 113 to the stopper 114, the portion of the blind hole 111 extending to the stopper 114 can be made to protrude from the edge of the through hole 221 close to the stopper 114. Based on this, the external monitoring component inserted in the blind hole 111 can be extended out of the through hole 221, can be extended out of the wall of the filter housing 20 provided with the through hole 221, can be extended into the inside of the filter housing 20, so that the external monitoring instrument can reliably, less interfere and accurately monitor the debugging waveform through the external monitoring component.

[0081] Of course, in other embodiments, the mounting member 11 may further include a connecting portion 115, which is connected to a side of the stopper 114 away from the mounting portion 113. The connecting portion 115 is used to mount the coupling member 12. The blind hole 111 may extend from the mounting portion 113 to the connecting portion 115.

[0082] See also Figure 1 , Figure 2 , Figure 5 In some embodiments of the present application, the snap protrusion 1131 is an annular structure extending along the circumference of the mounting portion 113, and the mounting portion 113 is provided with an adjustment groove 112, at least a portion of the adjustment groove 112 is extended and penetrated along the radial direction of the mounting portion 113, and cuts off the snap protrusion 1131.

[0083] It should be noted that the buckle protrusion 1131 is provided along the circumference of the mounting portion 113 and is provided in an annular shape. By adopting the above solution, the mounting member 11 can be stably and reliably buckled to the edge of the through hole 221 through the annular buckle protrusion 1131 extending along the circumference of the mounting portion 113. Based on this, the rotation stability of the mounting member 11 in the through hole 221 can be guaranteed and improved, and the buckle fitting area between the buckle protrusion 1131 and the edge of the through hole 221 can be enlarged, so that the fitting between the buckle protrusion 1131 and the edge of the through hole 221 is more stable and reliable.

[0084] It should also be noted that an adjustment groove 112 is provided at one end of the mounting portion 113 away from the stop portion 114. Part or all of the adjustment groove 112 is arranged to extend radially along the mounting portion 113 and is arranged to be through-set, that is, the adjustment groove 112 can be a cross groove, a plus-minus groove, a straight groove, etc. The adjustment groove 112 can be used for external tools (such as a screwdriver, an Allen wrench, etc.) to drive the mounting member 11 to rotate. By adopting the above scheme, the mounting portion 113 can be conveniently connected to the adjustment groove 112 through the adjustment groove 112, so as to drive the mounting member 11 and the coupling member 12 to rotate synchronously in a convenient, quick and labor-saving manner. Based on this, the coupling adjustment structure 10 can be rotated conveniently, quickly and labor-savingly, and the adjustment purpose can be achieved conveniently, quickly and accurately.

[0085] The adjusting groove 112 can form a truncated groove through the portion that is radially penetrated in the mounting portion 113, so as to cut off the portion of the mounting portion 113 and the annular buckle protrusion 1131. By adopting the above scheme, the mounting portion 113 can cut off the complete continuity of the portion of the mounting portion 113 in the circumferential direction and the complete continuity of the annular buckle protrusion 1131 in the circumferential direction through the portion of the adjusting groove 112 that is radially penetrated in the mounting portion 113, and provide deformation space for the portion of the mounting portion 113 and the buckle protrusion 1131. Based on this, during the assembly of the mounting member 11 to the through hole 221, the resistance to the inward contraction and deformation of the part of the mounting portion 113 and the buckle protrusion 1131 can be reduced, so that the part of the mounting portion 113 and the buckle protrusion 1131 can be conveniently adaptively contracted and deformed in the through hole 221, and then the assembly convenience and efficiency of the mounting member 11 and the through hole 221 can be improved on the basis of taking into account the matching reliability of the buckle protrusion 1131 and the hole edge of the through hole 221 and the rotation stability of the mounting member 11 in the through hole 221, and the assembly convenience and efficiency of the coupling adjustment structure 10 can be improved. In addition, the adjustment groove 112 has the effect of a truncated groove, and the simultaneous setting of the adjustment groove 112 and the truncated groove can be omitted, so that the influence of the setting of the hole and the groove on the structural strength of the mounting member 11 can be reduced, the strength loss and defects of the mounting member 11 can be reduced, the structural strength and stability of the coupling adjustment structure 10 can be guaranteed and improved, and the service life of the coupling adjustment structure 10 can be guaranteed and extended.

[0086] Of course, in other embodiments, when the snap-on protrusion 1131 is an annular structure extending along the circumference of the mounting portion 113 , a truncation groove may be separately provided to truncate the complete continuity of the annular snap-on protrusion 1131 in the circumferential direction.

[0087] Of course, in other embodiments, the snap protrusion 1131 may be a convex point, a convex block, a convex strip, etc. In this case, there is no need to provide a truncation groove.

[0088] See also Figure 4 , Figure 5Some embodiments of the present application provide a filter, including a filter housing 20, a plurality of resonant rods 30, and at least one coupling adjustment structure 10 provided in an embodiment of the present application, wherein the filter housing 20 has a first plate 21 and a second plate 22 arranged opposite to each other, the resonant rods 30 are arranged in the filter housing 20 and installed on the first plate 21, and the second plate 22 is provided with a through hole 221 for installing the coupling adjustment structure 10.

[0089] It should be noted that the filter housing 20 has a closed inner cavity inside, which can achieve a shielding function to prevent signal leakage. The inner cavity can be divided into at least one resonant cavity 23, and the resonant cavity 23 can accommodate a resonant rod 30.

[0090] The plate on one side of the filter housing 20 is the first plate 21, and the plate on the side of the filter housing 20 opposite to the first plate 21 is the second plate 22. In actual application scenarios, the filter can be placed with the second plate 22 facing upward, or with the second plate 22 facing left, right, front or back. In addition, this embodiment does not limit the shape, size, material, etc. of the filter housing 20.

[0091] It should also be noted that there are multiple resonant rods 30, each of which is disposed in the filter housing 20, and the desired coupling relationship can be established between the resonant rods 30 through, but not limited to, coupling ribs, coupling windows 24, etc.

[0092] The resonant rod 30 can be mounted on the first plate 21. That is, one end of the resonant rod 30 can be connected and fixed to the first plate 21 directly or via other components to be fixed relative to the filter housing 20. The resonant rod 30 can be connected and fixed to the first plate 21 by, but not limited to, welding, riveting, crimping, screw fastening, threaded connection, clamping, etc.

[0093] Among them, the resonance rod 30 can be a metal resonance rod, a ceramic dielectric resonance rod or a dielectric resonance rod of other materials. The resonance rod 30 can be a columnar resonance rod, a tubular resonance rod, a special-shaped resonance rod, a sheet metal resonance rod or other forms. The resonance rod 30 can be with a resonance disk or without a resonance disk. The resonance disk can have a flange or without a flange. This embodiment does not impose any restrictions on this.

[0094] The material, shape, structure, size, etc. of each resonant rod 30 may be the same or different, and this embodiment does not impose any limitation on this.

[0095] It should also be noted that the filter has the coupling adjustment structure 10 provided in the above embodiment of the present application. The number of coupling adjustment structures 10 is at least one. The second plate 22 is provided with a through hole 221 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 arranged between any two resonant rods 30. The coupling adjustment structure 10 can be rotatably installed in the through hole 221 via the mounting member 11, and the coupling between the two resonant rods 30 can be adjusted by rotating the coupling member 12.

[0096] By adopting the above solution, the filter can adjust the coupling between the corresponding two resonant rods 30 by applying the coupling adjustment structure 10 provided in the embodiment of the present application. In particular, the time spent on repeated debugging can be reduced when the debugging effect of the coupling adjustment structure 10 is difficult to make up for the coupling amount deviation, the debugging time can be reduced, and the debugging effect and debugging efficiency can be improved.

[0097] Furthermore, the through hole 221 for installing the coupling adjustment structure 10 is a light hole, and there is no need to tap an internal thread on the second plate 22 as in the prior art. Based on this, compared with the existing filter, the filter provided in this embodiment can simplify the processing difficulty and precision requirements of the second plate 22, thereby effectively reducing the processing cost of the second plate 22 and effectively improving the processing efficiency of the second plate 22.

[0098] Furthermore, while the mounting member 11 of the coupling adjustment structure 10 rotates relative to the through hole 221, the mounting member 11 and the through hole 221 can be in smooth contact. Based on this, the risk of scratching between the mounting member 11 and the through hole 221 and generating burrs, debris and other impurities can be reduced, thereby effectively ensuring and improving the intermodulation and power performance of the filter.

[0099] In addition, since the filter applies the coupling adjustment structure 10 provided in the above embodiment of the present application, it can have the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0100] See also Figure 4 , Figure 5 In some embodiments of the present application, at least one coupling adjustment structure 10 is disposed between two adjacent resonant rods 30 and is used to adjust the coupling strength between the two adjacent resonant rods 30 .

[0101] It should be noted that the coupling adjustment structure 10 can be arranged between two adjacent resonant rods 30 to serve as a coupling rod 10a. The two adjacent resonant rods 30 can be adjacent on the main signal transmission path, that is, the coupling between the two resonant rods 30 is a coupling relationship on the main signal transmission path, that is, the coupling relationship between the two resonant rods 30 is cascaded.

[0102] In this case, the coupling adjustment structure 10 as the coupling rod 10a can be used to form coupling between two adjacent resonant rods 30 and strengthen the coupling. In addition, by rotating the coupling adjustment structure 10, the coupling area of ​​the coupling member 12 relative to the two resonant rods 30 can be changed, thereby adjusting the coupling strength between the two resonant rods 30.

[0103] See also Figure 6 In some embodiments of the present application, the number of the resonant rods 30 is at least three, the filter housing 20 has a coupling window 24, the coupling adjustment structure 10 is disposed in the coupling window 24, and is used to adjust the passband out-of-band suppression.

[0104] It should be noted that, when the number of the resonant rods 30 is at least three, at least two of the resonant rods 30 need to construct cross-coupling via the coupling window 24. That is, the two resonant rods 30 are not adjacent to each other on the main signal transmission path, and the coupling between the two resonant rods 30 via the coupling window 24 is cross-coupling, that is, the coupling relationship between the two resonant rods 30 is non-cascade.

[0105] In this case, the coupling adjustment structure 10 can be arranged at the coupling window 24 as a flying rod 10b, so that cross coupling is formed between the two resonant rods 30 arranged on both sides of the coupling window 24. In addition, the coupling area of ​​the coupling member 12 relative to the two resonant rods 30 on both sides of the coupling window 24 can be changed by rotating the coupling adjustment structure 10, thereby adjusting the passband out-of-band suppression and adjusting the transmission zero point of the filter channel.

[0106] Among them, if the filter is provided with multiple coupling adjustment structures 10, all coupling adjustment structures 10 can be used to adjust the coupling strength, or all coupling adjustment structures 10 can be used to debug the passband out-of-band suppression, or some coupling adjustment structures 10 can be used to adjust the coupling strength and some coupling adjustment structures 10 can be used to debug the passband out-of-band suppression.

[0107] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A coupling adjustment structure, characterized in that: It includes a mounting piece rotatably mounted on a through hole, and a coupling piece connected to one end of the mounting piece, wherein the mounting piece is an insulating piece, and a blind hole is provided at one end of the mounting piece away from the coupling piece, and one end of the blind hole close to the coupling piece protrudes from the corresponding end of the through hole, and the blind hole is used for inserting an external monitoring piece therein to monitor the debugging waveform.

2. The coupling adjustment structure according to claim 1, characterized in that: The blind hole is arranged at the central axis of the mounting member.

3. The coupling adjustment structure according to claim 1, characterized in that: The blind hole is a circular hole.

4. The coupling adjustment structure according to claim 1, characterized in that: An adjustment groove is provided at one end 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.

5. The coupling adjustment structure according to claim 4, characterized in that: A part of the blind hole is arranged to overlap with the adjusting groove.

6. The coupling adjustment structure according to any one of claims 1 to 5, characterized in that: The mounting piece is buckled in the through hole.

7. The coupling adjustment structure according to claim 6, characterized in that: The mounting member includes a mounting portion and a stop portion connected in sequence, the mounting portion is rotatably mounted on the through hole, a snap protrusion is provided on the outer periphery of the mounting portion, the snap protrusion is snapped on the edge of the through hole, the stop portion at least partially protrudes from the mounting portion in the circumferential direction, and the stop portion stops at the edge of the through hole.

8. The coupling adjustment structure according to claim 7, characterized in that: The blind hole extends from the mounting portion to the stop portion; And / or, the snap protrusion is an annular structure extending along the circumference of the mounting portion, the mounting portion is provided with an adjustment groove, at least a portion of the adjustment groove extends and penetrates along the radial direction of the mounting portion and cuts off the snap protrusion.

9. A filter, characterized in that: It includes a filter housing, a plurality of resonant rods, and at least one coupling adjustment structure as described in any one of claims 1 to 8, wherein the filter housing has a first plate member and a second plate member arranged opposite to each other, the resonant rods are arranged in the filter housing and mounted on the first plate member, and the second plate member is provided with the through hole for mounting the coupling adjustment structure.

10. The filter according to claim 9, characterized in that At least one coupling adjustment structure is disposed 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 filter housing has a coupling window, the coupling adjustment structure is arranged in the coupling window, and is used to adjust the passband out-of-band suppression.

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