CN215644932U

CN215644932U - Filter debugging structure

Info

Publication number: CN215644932U
Application number: CN202121820777.4U
Authority: CN
Inventors: 陶海军; 万波; 柯友文; 吴凡
Original assignee: Wuhan Fingu Electronic Technology Co Ltd
Current assignee: Wuhan Fingu Electronic Technology Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-25
Anticipated expiration: 2031-08-05

Abstract

The utility model provides a filter debugging structure which comprises a cavity, a cover plate and a plurality of resonant rods, wherein the cover plate covers the cavity, the resonant rods are arranged on a bottom plate in the cavity at intervals and extend from the top of the bottom plate of the cavity, the end part, close to the cover plate, of each resonant rod is connected with a tuning plate, a coupling connecting rod is arranged between every two adjacent resonant rods, a tuning coupling hole is formed in the bottom plate of the cavity and corresponds to the coupling connecting rod, a coupling screw rod is arranged in the tuning coupling hole, and the end part of the coupling screw rod extends into the cavity between every two adjacent resonant rods. This wave filter debugging structure adopts the cavity bottom as the tuning face, sinks to increase the coupling screw nut through the bottom and adjusts the coupling mode, and the deformation of tuning board is adjusted with the frock simultaneously and the frequency is tuned to realize the debugging performance index of wave filter, compare in traditional wave filter screw rod regulation structure, saved the screw rod height from whole height, be favorable to the miniaturized design of wave filter product.

Description

Filter debugging structure

Technical Field

The utility model belongs to the technical field of filters, and particularly relates to a filter debugging structure.

Background

Cavity filters are widely used in the field of communications as a frequency selective device. The cavity filter debugging structure in the prior art generally increases the screw rod debugging through lapping on, fixes tuning frequency and coupling through nut locking, and screw rod and nut can occupy the partly of overall height, are unfavorable for reducing the overall height volume of product, are particularly unfavorable for miniaturized design.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the existing cavity filter is complex in structure, and the tuning screw occupies the whole height of the filter and is not beneficial to miniaturization design.

In order to achieve the purpose, the utility model provides a filter debugging structure, which comprises a cavity, a cover plate and a plurality of resonance rods, wherein the cover plate covers the cavity, the resonance rods are arranged on a bottom plate in the cavity at intervals and extend from the bottom plate of the cavity to the top, the end part, close to the cover plate, of each resonance rod is connected with a tuning plate, a coupling connecting rod is arranged between every two adjacent resonance rods, a tuning coupling hole is formed in the bottom plate of the cavity and corresponds to the coupling connecting rod, a coupling screw rod is arranged in the tuning coupling hole, the end part of the coupling screw rod extends into the cavity between every two adjacent resonance rods, and a tuning hole is formed in the bottom plate of the cavity and corresponds to the tuning plate.

Furthermore, the cavity is internally provided with a partition plate which divides the cavity into an input cavity and an output cavity, the side walls of the cavities corresponding to the two cavities are provided with connecting ports, and the connecting ports are connected with the resonance rods in the corresponding cavities through coupling pieces.

Furthermore, a bulge is arranged at the center of the top of the resonance rod, and a mounting hole matched with the bulge is formed in the tuning plate.

Furthermore, the tuning plates cover the upper surface of the resonant rod, the tuning plates are arranged at equal intervals, and the coupling screw rod is opposite to a spacing area between two adjacent tuning plates.

Furthermore, the coupling adjusting hole comprises a large-aperture section and a small-aperture section which are sequentially extended inwards from the outer surface of the cavity bottom plate, and inner threads matched with the coupling screw rods are arranged on the inner wall of the small-aperture section.

Furthermore, the resonance rod, the coupling connecting rod and the bottom plate of the cavity are of an integrated structure.

Furthermore, the bottom plate and the side wall of the cavity are of an integrated structure.

Compared with the prior art, the utility model has the beneficial effects that:

the filter debugging structure provided by the utility model adopts the bottom of the cavity as a tuning surface, adjusts the coupling mode by sinking and increasing the coupling screw and the coupling nut at the bottom, and simultaneously adjusts the frequency by adjusting the deformation of the tuning plate on the resonance rod by using a tool, thereby realizing the debugging performance index of the filter.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is an overall schematic diagram of the filter debugging architecture of the present invention;

FIG. 2 is a schematic diagram of the bottom structure of the filter debugging structure of the present invention;

FIG. 3 is an exploded view of the filter debug architecture of the present invention;

FIG. 4 is a schematic diagram of the internal structure of the filter debugging structure of the present invention;

fig. 5 is a schematic diagram of an inverted internal structure of the filter debugging structure of the present invention.

Description of reference numerals: 1. a cavity; 2. a cover plate; 3. a connection port; 4. a coupling member; 5. a base plate; 6. adjusting the coupling hole; 7. a coupling screw; 8. a tuning plate; 9. a resonant rod; 10. a partition plate; 11. a protrusion; 12. mounting holes; 13. a coupling link; 14. a tuning hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 5, this embodiment provides a filter debugging structure, including a cavity 1, a cover plate 2, and a plurality of resonant rods 9, where the cavity 1 includes a bottom plate 5 and a side wall surrounding the bottom plate 5, the bottom plate 5 and the side wall of the cavity 1 are integrally die-cast, the upper side of the cavity 1 is open, and the cover plate 2 covers the open side of the cavity 1, the cavity 1 in this embodiment is square, and in other embodiments, the cavity 1 may also be circular or in other shapes. Resonant rod 9 interval arrangement is on bottom plate 5 in cavity 1 to extend to the top by bottom plate 5 of cavity 1, each resonant rod 9 is last to be close to apron 2's tip all to be connected with a tuning board 8, and is adjacent be equipped with coupling connecting rod 13 between the resonant rod 9, coupling connecting rod 13 can be assembled fixedly after integrated into one piece or separately-formed with bottom plate 5 of cavity 1, and is preferred, and resonant rod 9, coupling connecting rod 13 and the integrative die-casting of bottom plate 5 of cavity 1 are fashioned, convenient processing, with low costs, and have simplified the equipment of wave filter. The bottom plate 5 of the cavity 1 is provided with a coupling adjusting hole 6 corresponding to the coupling connecting rod 13, a coupling screw 7 is arranged in the coupling adjusting hole 6, the end part of the coupling screw 7 extends into the cavity 1 between the adjacent resonant rods 9, and a tuning hole 14 corresponding to the tuning plate 8 is formed in the bottom plate 5 of the cavity 1.

In the embodiment, for the coupling mode between the resonant rods 9, the traditional mode of installing the coupling screw 7 on the cover plate 1 for adjusting and coupling is changed, the bottom of the cavity 1 is used as a tuning surface in the filter debugging structure of the embodiment, the coupling screw 7 is installed in a mode of punching and sinking at the bottom, the length of the coupling screw 7 extending into the cavity 1 from the bottom of the cavity 1 is changed for adjusting and coupling by rotating the coupling screw 7, the coupling screw 7 is installed in the adjusting and coupling hole 6 sinking at the bottom of the cavity 1, the overall height of the filter structure is not occupied, and compared with the traditional filter screw adjusting structure, the screw height is saved from the overall height, so that the miniaturization design of a filter product is facilitated; for the mode of tuning frequency, this embodiment adopts the mode of setting up tuning plate 8 at resonance rod 9 top, sets up tuning hole 14 on the bottom plate 5 of cavity 1, utilizes the frock to penetrate to cavity 1 in from tuning hole 14 and adjust the deformation of tuning plate 8 on resonance rod 9 and tune the frequency, and the tuning mode is simple, and tuning plate 8 arranges inside the cavity moreover, need not to occupy the holistic height of filter structure equally, does benefit to the design of product miniaturization.

In a detailed embodiment, as shown in fig. 2, a partition plate 10 is disposed in the cavity 1, the cavity 1 is divided into two input and output chambers, the partition plate 10 can be integrally attached to the bottom of the cavity 1 by, for example, soldering or welding, a resonant rod 9 is correspondingly disposed in the two input and output chambers, a groove penetrating through the two input and output chambers is disposed on the partition plate 10, a cross coupling piece between the resonant rod 9 on the input side and the resonant rod 9 on the output side is disposed through the groove, a connecting port 3 is disposed on a side wall of the cavity 1 corresponding to the two chambers, and the connecting port 3 is connected with the resonant rod 9 in the corresponding chamber through the coupling piece 4.

In one embodiment, as shown in fig. 3 and 4, the top center of the resonance rod 9 is provided with a protrusion 11, and the tuning plate 8 is provided with a mounting hole 12 matching with the protrusion 11, so that the tuning plate 8 is positioned on the top of the resonance rod 9. Preferably, the tuning plates 8 cover the whole upper surface of the resonant rod 9, the tuning holes 14 are distributed around the tuning plates 8, the tuning plates 8 are arranged at equal intervals, and the coupling screw 7 is opposite to a spacing area between two adjacent tuning plates 8.

For the coupling adjustment, as shown in fig. 2, 4 and 5, the coupling adjustment hole 6 includes a large aperture section and a small aperture section which extend inwards from the outer surface of the bottom plate 5 of the cavity 1 in sequence, as one embodiment, a coupling nut may be fixed on the end surface of the large aperture section connected with the small aperture section, the central hole of the coupling nut and the small aperture section are arranged coaxially, the coupling screw 7 is connected with the coupling nut through a thread, so that the coupling screw rotates to change the length of the coupling screw extending into the cavity, and the coupling screw 7 is fixed to overcome the gravity effect of the coupling screw 7 mounted at the bottom of the cavity 1; as another embodiment, the inner wall of the small-bore section may be provided with an internal thread which is matched with the coupling screw 7, so that the coupling screw 7 can rotate to change the length of the coupling screw which extends upwards into the cavity 1, and the coupling screw 7 can be fixed to overcome the gravity effect of the coupling screw 7 which is installed at the bottom of the cavity 1, and at this time, the coupling nut only needs to be arranged in the large-bore section to be matched with the coupling screw 7, so as to further avoid the left-right shaking of the coupling screw 7.

In summary, the filter debugging structure provided by the utility model adopts the bottom of the cavity as a tuning surface, the coupling mode is adjusted by punching and sinking the bottom and increasing the coupling screw nuts, and the frequency is tuned by adjusting the deformation of the resonant rod disc surface by using the tool, so that the debugging performance index of the filter is realized.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the utility model, which is intended to be covered by the claims and any design similar or equivalent to the scope of the utility model.

Claims

1. A filter debugging structure, characterized in that: including cavity, apron and a plurality of resonance bar, the apron cover in on the cavity, the resonance bar interval arrangement is on the bottom plate in the cavity to extend to the top by the bottom plate of cavity, each the tip that is close to the apron on the resonance bar all is connected with a tuning plate, and is adjacent be equipped with the coupling connecting rod between the resonance bar, it transfers the coupling hole to correspond coupling connecting rod department on the bottom plate of cavity, transfer the downthehole coupling screw rod that is equipped with of coupling, the tip of coupling screw rod extends to in the cavity between the adjacent resonance bar, it is equipped with the tuning hole to correspond the tuning plate on the bottom plate of cavity.

2. A filter debugging structure according to claim 1, characterized in that: the cavity is internally provided with a partition plate which divides the cavity into an input cavity and an output cavity, the side walls of the cavities corresponding to the two cavities are provided with connecting ports, and the connecting ports are connected with the resonance rods in the corresponding cavities through coupling pieces.

3. A filter debugging structure according to claim 1, characterized in that: the center of the top of the resonance rod is provided with a bulge, and the tuning plate is provided with a mounting hole matched with the bulge.

4. A filter debugging structure according to claim 1, characterized in that: the tuning plates cover the upper surface of the resonant rod, the tuning plates are arranged at equal intervals, and the coupling screw rod is over against a spacing area between two adjacent tuning plates.

5. A filter debugging structure according to claim 1, characterized in that: the coupling adjusting hole comprises a large-aperture section and a small-aperture section which are sequentially extended inwards from the outer surface of the cavity bottom plate, and inner threads matched with the coupling screw rods are arranged on the inner wall of the small-aperture section.

6. A filter debugging structure according to claim 1, characterized in that: the resonance rod, the coupling connecting rod and the bottom plate of the cavity are of an integrated structure.

7. A filter debugging structure according to claim 1, characterized in that: the bottom plate and the side wall of the cavity are of an integrated structure.