CN212571288U

CN212571288U - Filter

Info

Publication number: CN212571288U
Application number: CN202020739663.6U
Authority: CN
Inventors: 童恩东; 王细冬
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-02-19
Anticipated expiration: 2030-05-08

Abstract

The utility model relates to a filter, which comprises a cavity and a cover plate matched with the cavity, wherein a resonator is arranged in the resonant cavity of the cavity, the upper part of the resonator is a threaded rod, the cover plate is correspondingly provided with a threaded hole, the resonator is arranged on the cover plate through the threaded rod at the upper part, and the lower part of the resonator is hung in the resonant cavity; an elastic conductive element is sleeved on the resonator and is abutted between the resonator and the cover plate. Compared with the prior art, the utility model discloses the wave filter has the height that can reduce the wave filter, and compact structure, volume are littleer, debugging easy operation and avoid the signal to produce the technological effect of revealing through the thread gap.

Description

Filter

Technical Field

The utility model relates to a communication technology field, in particular to waveguide device especially relates to a coaxial 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 filter in the prior art comprises a filter cavity, a resonator arranged in the cavity, a cover plate covered on the cavity, and an adjusting screw rod locked and erected on the cover plate through a nut; the depth of the adjusting screw rod is adjusted, so that the coupling distance of the resonator is changed to achieve the purpose of adjusting the coupling amount. The nut locking operation is not only troublesome, but also more important, the adjusting screw and the nut for fixing the adjusting screw are higher than the cover plate, the higher space is wasted space, the height of the filter cannot be minimized, and the requirement of miniaturization of the use environment is not met.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to prior art's weak point, thereby it reduces the wave filter height to provide one kind and get rid of the nut to conveniently adjust the wave filter of coupling volume.

The utility model provides a technical scheme that its technical problem adopted does:

a filter comprises a cavity and a cover plate matched with the cavity, wherein a resonator is installed in a resonant cavity of the cavity, the upper part of the resonator is a threaded rod, the cover plate is correspondingly provided with a threaded hole, the resonator is installed on the cover plate through the threaded rod on the upper part, and the lower part of the resonator is suspended in the resonant cavity; an elastic conductive element is sleeved on the resonator and is abutted between the resonator and the cover plate.

Further, the method comprises the following steps:

the elastic conductive member is cylindrical with the same width as the upper and lower parts.

The elastic conductive element is disc-shaped with a wide top and a narrow bottom.

The resonator comprises a bottom plate and a connecting rod vertically extending from the bottom plate, the threaded rod is the upper section of the connecting rod, a step is arranged at the transition position of the threaded rod and the connecting rod, the bottom surface of the elastic conductive element is abutted against the step, and the top surface of the elastic conductive element is tightly attached to the bottom surface of the cover plate.

The bottom plate of the resonator is circular.

And the top surface of the threaded rod of the resonator is provided with an adjusting groove for adjusting the rotation of the resonator.

The elastic conductive element is disc-shaped.

The connecting rod is of a cavity type structure.

The utility model discloses the rotatory regulation that can realize the coupling volume of syntonizer, the back elasticity conductive element that puts in place of regulation provides pretension elasticity, and the syntonizer installation is more stable, no longer needs lock nut. Compared with the prior art, the method has the following technical effects:

firstly, a locking nut is omitted, the adjusting part can be adjusted not to be higher than the cover plate, 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 secondly, the elastic conductive element is connected with the resonator and the cover plate, so that the signal is prevented from leaking through a thread gap.

Thirdly, the signals in the cavity do not pass through the thread part of the resonator, so that the resonant cavity is smoother, and the signal indexes are better.

Fourthly, simple structure, convenient equipment.

Drawings

Fig. 1 is a schematic cross-sectional orthographic view of an embodiment of the filter of the present invention;

fig. 2 is an exploded orthographic view of an embodiment of the filter of the present invention;

fig. 3 is a schematic diagram of an exploded axonometric projection of an embodiment of the filter of the present invention;

figure 4 is a schematic diagram of an axonometric projection of a resonator of an embodiment of the filter of the present invention;

fig. 5 is a schematic diagram of an axonometric projection of an elastic conductive element according to an embodiment of the filter of the present invention.

Detailed Description

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

A filter, as shown in fig. 1 to 5, comprises a cavity 30 and a cover plate 34 adapted to the cavity, wherein a resonator 31 is installed in a resonant cavity 32 of the cavity 30. The upper part of the resonator 31 is a threaded rod 311, the cover plate 34 is correspondingly provided with a threaded hole 341, the resonator 31 is installed on the cover plate 34 through the upper threaded rod 311, and the lower part is suspended in the resonant cavity 32. A disc-shaped elastic conductive element 50 is fitted over the resonator 31 and abuts between the resonator 31 and the cover plate 34. The elastic conductive element may be a cylindrical shape having the same width as the upper and lower parts or a disc shape having a wide upper part and a narrow lower part, or the like. The resilient conductive element may be metallic or made of a conductive non-metal.

In this embodiment, the resonator 31 includes a bottom plate 313 and a connecting rod 315 vertically extending upward from the bottom plate 313, the threaded rod 311 is an upper section of the connecting rod 315, a step 316 is provided at a transition of the threaded rod 311 and the connecting rod 315, the bottom surface 51 of the elastic conductive element 50 abuts on the step 316, and the top surface 52 of the elastic conductive element 50 is tightly attached to the bottom surface of the cover plate 34. In this embodiment, the bottom plate 313 of the resonator is circular, and the connecting rod 315 is cylindrical, which is beneficial to making the resonant cavity smoother. In order to save materials and reduce the weight of the device, the connecting rod adopts a cavity type structure.

As shown in fig. 4, the threaded rod 311 of the resonator 31 is provided at the top surface thereof with an adjustment groove 312 for adjusting the rotation of the resonator 31.

The embodiment shown in fig. 1 to 5 is a resonator filter structure. In other embodiments, a plurality of resonant cavities 32 may be disposed within the cavity 30; the resonators are mounted on the cover 34 and suspended in a one-to-one correspondence within the respective resonant cavities of the cavity. The installation structure of the resonator in the filter with the multiple resonant cavities is the same as that of the resonator in the single resonant cavity.

The coupling quantity of the resonant cavity of the filter depends on the coupling area and the relative distance between the coupling surface of the resonator and the bottom surface of the relative resonant cavity; the amount of coupling is inversely proportional to the relative distance and directly proportional to the coupling area. In this embodiment, the resonator coupling surface is the bottom surface 310 of the resonator, and its area is fixed. The adjustment of the coupling amount in the present embodiment is achieved by adjusting the travel of the resonator in the screw hole of the cover plate 34, i.e., adjusting the distance between the bottom surface 310 of the resonator and the bottom surface of the resonant cavity.

The elastic conductive element has an elastic variation sufficient to ensure that the elastic conductive element is in close contact with the cover plate when the resonator is tuned within the up-down adjustment range. The utility model discloses the rotatory regulation that can realize the coupling volume of syntonizer, the back elasticity conductive element that puts in place of regulation provides pretension elasticity, and the syntonizer installation is more stable, no longer needs lock nut to possible regulating part is not high to lap, has reduced the height of wave filter effectively, has reduced installation space and manufacturing cost, more is applicable to miniaturized demands such as mobile communication device. And, simple structure, convenient equipment. In addition, the elastic conductive element is connected with the resonator and the cover plate, so that the signal is prevented from leaking through a thread gap, the signal in the cavity does not pass through the thread part of the resonator, the resonant 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 that such modifications and substitutions are intended to be included within the scope of the appended claims.

Claims

1. A filter, includes cavity and the apron of adaptation with it, install the syntonizer in the resonant cavity of cavity, characterized in that:

the upper part of the resonator is a threaded rod, a threaded hole is correspondingly formed in the cover plate, the resonator is installed on the cover plate through the threaded rod on the upper part, and the lower part of the resonator is suspended in the resonant cavity; an elastic conductive element is sleeved on the resonator and is abutted between the resonator and the cover plate.

2. The filter of claim 1, wherein: the elastic conductive member is cylindrical with the same width as the upper and lower parts.

3. The filter of claim 1, wherein: the elastic conductive element is disc-shaped with a wide top and a narrow bottom.

4. The filter of claim 1, wherein: the resonator comprises a bottom plate and a connecting rod vertically extending from the bottom plate, the threaded rod is the upper section of the connecting rod, a step is arranged at the transition position of the threaded rod and the connecting rod, the bottom surface of the elastic conductive element is abutted against the step, and the top surface of the elastic conductive element is tightly attached to the bottom surface of the cover plate.

5. The filter of claim 4, wherein: the bottom plate of the resonator is circular.

6. A filter according to claim 1 or 2, characterized in that: and the top surface of the threaded rod of the resonator is provided with an adjusting groove for adjusting the rotation of the resonator.

7. The filter of claim 4, wherein: the connecting rod is of a cavity type structure.