阅读说明：本技术 滤波器 (Filter ) 是由 王细冬 于 2020-06-03 设计创作，主要内容包括：本发明涉及一种滤波器,包括复数个腔体、覆盖各腔体的盖板和用于调节相邻腔体之间隔板上窗口面积的窗口耦合调节结构,该窗口耦合调节结构包括调节杆,该调节杆安装在盖板上,下部悬挂在窗口内,所述调节杆转动时,该调节杆相对盖板的上下位置固定,所述调节杆的形状设置为该调节杆转动时其所占窗口耦合量发生变化。与现有技术相比,本发明滤波器具有窗口耦合调节简单,可降低滤波器的高度,结构紧凑、以及伸进腔体内的螺纹影响滤波器性能的技术效果。(The invention relates to a filter, which comprises a plurality of cavities, a cover plate covering each cavity and a window coupling adjusting structure for adjusting the area of a window on a partition plate between adjacent cavities, wherein the window coupling adjusting structure comprises an adjusting rod, the adjusting rod is arranged on the cover plate, the lower part of the adjusting rod is hung in the window, the adjusting rod is fixed relative to the upper part and the lower part of the cover plate when rotating, and the shape of the adjusting rod is set to change the window coupling amount occupied by the adjusting rod when rotating. Compared with the prior art, the filter has the technical effects that the window coupling adjustment is simple, the height of the filter can be reduced, the structure is compact, and the threads extending into the cavity influence the performance of the filter.)

1. The utility model provides a filter, includes a plurality of cavitys, covers the apron of each cavity and is used for adjusting the window coupling of window area on the baffle between the adjacent cavity and adjusts the structure, and this window coupling is adjusted the structure and is included adjusting the pole, should adjust the pole and install on the apron, and the lower part hangs in the window, its characterized in that: when the adjusting rod rotates, the adjusting rod is fixed at the upper position and the lower position relative to the cover plate, and the shape of the adjusting rod is set to be changed in the window coupling amount when the adjusting rod rotates.

2. The filter of claim 1, wherein: when the adjusting rod rotates, the shape of the adjusting rod is set to be changed in the area of the window occupied by the adjusting rod when the adjusting rod rotates.

3. The filter of claim 2, wherein: the lower part of the adjusting rod is a cylinder with a single-side or double-side flat position.

4. The filter of claim 1, wherein: the top surface of the adjusting rod is provided with a clamping position for adjusting the rotation of the adjusting rod, and the clamping position is in an inner hexagon shape.

5. The filter of claim 2, wherein: the upper part of the adjusting rod is in a rivet shape and comprises a nail head positioned on the cover plate, a nail rod penetrating through the cover plate and a boss tightly attached to the lower surface of the cover plate, and the adjusting rod is integrally formed.

6. The filter according to any one of claims 2 to 5, characterized in that: an elastic element is arranged between the rod head of the adjusting rod and the cover plate.

7. The filter of claim 6, wherein: the elastic element is a disc spring.

Technical Field

The invention relates to the technical field of communication, in particular to a cavity filter.

Background

The filter used for the communication equipment can effectively restrain useless signals and plays the roles of selecting signals, attenuating noise, filtering interference and the like. With the development of miniaturization and lightness of mobile communication devices and equipment base stations, filters in the mobile communication devices and the equipment base stations are required to be suitable for narrow assembly spaces in the mobile communication devices and the equipment base stations, and the requirements of smaller structures and better performance are met. The cavity filter in the prior art mainly comprises a plurality of cavities, cover plates covering the cavities, debugging screws, locking nuts, set screws and the like, wherein each cavity is internally provided with a resonance column, and the cover plates are provided with screw through holes for mounting the set screws and the debugging screws. A window is arranged on the clapboard between the cavities. The size of the window area is used to adjust the amount of coupling. The structure diagram of the existing window area size adjustment is shown in fig. 6, and comprises an adjusting screw 1 and a locking nut 2 arranged on a cover plate 3, wherein the adjusting screw 1 is screwed into a window 5 arranged on a partition plate 4, and the depth of the adjusting screw 1 in the window 5 is controlled to adjust the area of the window to achieve the purpose of adjusting the coupling amount of the filter. The structure has a plurality of parts and the locking operation of the screw rod is complicated. And adjusting screw and lock nut part are higher than the apron, and the part that exceeds leads to the whole height-increasing of wave filter to the demand of the miniaturization is not adapted, and, adjusting screw stretches into the screw thread part in the cavity can influence the performance of wave filter.

Disclosure of Invention

The invention aims to solve the technical problem of providing a filter which is convenient for adjusting the coupling quantity of an upper window of a partition plate between cavities aiming at the defects of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a filter, includes a plurality of cavitys, covers the apron of each cavity and is used for adjusting the window coupling of window area on the baffle between the adjacent cavity and adjusts the structure, and this window coupling is adjusted the structure and is included adjusting the pole, should adjust the pole and install on the apron, and the lower part hangs in the window, when adjusting the pole and rotating, the upper and lower position of the relative apron of this regulation pole is fixed, the shape of adjusting the pole sets up to this regulation pole and rotates the time window coupling volume and change.

Further:

when the adjusting rod rotates, the shape of the adjusting rod is set to be changed in the area of the window occupied by the adjusting rod when the adjusting rod rotates.

The lower part of the adjusting rod is a cylinder with a single-side or double-side flat position.

The top surface of the adjusting rod is provided with a clamping position for adjusting the rotation of the adjusting rod, and the clamping position is in an inner hexagon shape.

The upper part of the adjusting rod is in a rivet shape and comprises a nail head positioned on the cover plate, a nail rod penetrating through the cover plate and a boss tightly attached to the lower surface of the cover plate, and the adjusting rod is integrally formed.

An elastic element is arranged between the rod head of the adjusting rod and the cover plate.

The elastic element is a disc spring.

The adjusting rod of the invention can realize the adjustment of the window coupling amount by rotating, and a locking nut is not needed. Compared with the prior art, the method has the following technical effects:

firstly, when the adjusting rod is rotated, the shape of the adjusting rod is set to be that the window coupling amount is changed when the adjusting rod rotates. For example, a flat position is arranged on a cylindrical adjusting rod, the direction of the flat position is changed along with the rotation of the adjusting rod, when the flat position plane is parallel to the section direction of the window, the window is minimum, and when the flat position plane is vertical to the section direction of the window, the window is maximum; the size of the window is adjusted, so that the performance of the filter is adjusted, and the adjustment is convenient;

secondly, a locking nut is omitted, the height of the filter is effectively reduced, the installation space and the manufacturing cost are reduced, and the filter is more suitable for the miniaturization requirements of mobile communication devices and the like;

and thirdly, the adjusting rod has no screw thread, so that the cavity is smoother, and the influence of the screw thread extending into the cavity on the performance of the filter is avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of a window coupling adjustment structure of an embodiment of a filter according to the present invention;

FIG. 2 is an exploded cross-sectional view of a window coupling adjustment structure of an embodiment of a filter according to the present invention;

FIG. 3 is a schematic perspective view of a window adjustment lever of an embodiment of the filter of the present invention;

FIG. 4 is a schematic diagram of an axonometric projection of an embodiment of the filter of the present invention;

FIG. 5 is a schematic cross-sectional view of an embodiment of a filter according to the present invention with a minimum window area in the window coupling adjustment structure;

fig. 6 is a schematic cross-sectional view of a conventional filter window adjustment structure.

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, a filter includes a plurality of cavities 10 and a cover plate 20 covering each cavity 10. Windows 40 are provided in the partition plate 30 between the chambers 10. Within each cavity 10 is a resonant post 70. In addition, the window coupling adjusting structure is used for adjusting the window coupling amount on the partition board between the adjacent cavities, the window coupling adjusting structure comprises an adjusting rod 50, the adjusting rod 50 is installed on the cover plate 20, the lower portion of the adjusting rod is suspended in the window 40, and the shape of the adjusting rod 50 is set to be changed when the adjusting rod rotates, so that the area of the window occupied by the adjusting rod is changed. In this embodiment, the adjusting rod 50 is riveted with the cover plate 20. An elastic element 60 is disposed between the head of the adjusting lever 50 and the cover plate 20, in this embodiment, the elastic element 60 is a disc spring, and provides a pre-tightening elastic force when the adjusting lever is riveted.

As shown in FIG. 3, the adjusting rod comprises an upper part and a lower part, the upper part is in a rivet shape and is used for being fixed with the cover plate, the upper part comprises a nail head 52 positioned on the cover plate 20, a nail rod 53 penetrating through the cover plate 20 and a boss 54 tightly attached to the lower surface of the cover plate, the outer diameter of the nail rod 53 is smaller than the outer diameters of the nail head 52 and the boss 54, namely, a circle of groove is formed between the nail head 52 and the boss 54. The resilient element 60, shown in fig. 1 as a disc spring, snaps into the recess and abuts between the stud 52 and the cover plate 20. The shape of the lower part of the adjusting rod is set to be that the area of the window occupied by the adjusting rod changes when the adjusting rod rotates, and the adjusting rod can be a cylinder with a single-side or double-side flat position 51 or other shapes that the area of the window occupied by the adjusting rod changes when the adjusting rod rotates. In this embodiment, the lower portion of the adjusting rod is provided with two flat positions, and the two flat positions are symmetrically arranged. The adjusting rod is integrally formed. The top surface of the adjusting rod is provided with a clamping position 55 for adjusting the rotation of the adjusting rod. In this embodiment, the shape of this screens is interior hexagon for with adjusting the instrument cooperation in order to drive the regulation pole and rotate.

When the window coupling amount is adjusted, the position-locking part 55 is used to drive the adjusting rod to rotate, the direction of the flat position 51 of the adjusting rod changes, and when the flat position plane is parallel to the window section direction (i.e. the plane where the window is located), the window is the smallest, as shown in fig. 5. The window is largest when the flat plane is perpendicular to the window cross-sectional direction, as shown in fig. 1. The window size is adjusted to achieve the performance of the tuned filter. When the adjusting range is not large, the adjusting rod is selectively provided with a single-side flat position, and when the adjusting range is large, the adjusting rod is selectively provided with a double-side flat position.

The elastic variable of the elastic element is enough to ensure that the elastic element can be tightly attached with the cover plate when the adjusting rod is adjusted within the upper and lower adjusting ranges. The invention can realize the adjustment of the coupling amount by rotating the adjusting rod, the elastic element provides pre-tightening elastic force after the adjustment is in place, the resonator is more stably installed, a locking nut is not needed, the height of the filter is effectively reduced, the installation space and the manufacturing cost are reduced, and the invention is more suitable for the miniaturization requirements of mobile communication devices and the like. And, simple structure, convenient equipment. In addition, the elastic element is connected with the adjusting rod and the cover plate, the adjusting rod is not provided with threads, the signal is prevented from leaking through a thread gap, the inside of the cavity is smoother, and the signal index is better.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and such modifications and substitutions are intended to be included within the scope of the appended claims.