CN219626871U - Novel filter - Google Patents

Abstract

The utility model is applicable to the field of communication equipment, and provides a novel filter, which comprises a shell, a cover plate and a metal resonance column, wherein the shell is provided with an open resonance cavity; the filling sleeve is provided with an open protection cavity; the contour of the inner wall of the protection cavity is the same as the contour of the outer side of the metal resonance column, and the metal resonance column is positioned in the protection cavity; the bottom edge of the filling sleeve is provided with an inwardly extending flanging, the flanging is sleeved on the bottom edge of the metal resonance column, the metal resonance column is covered by the filling sleeve and has good laminating performance, friction generated by the metal resonance column and the filling sleeve is small, abrasion between the filling sleeve and the metal resonance column is prevented, the service life of the device is prolonged, and meanwhile, the size of a cavity of the resonant cavity can be effectively reduced, so that the overall size of the whole low-frequency metal resonator is reduced.

Description

Novel filter

Technical Field

The utility model belongs to the field of communication equipment, and particularly relates to a novel filter.

Background

With the continuous development of communication technology, the miniaturization requirements for communication equipment such as base stations are increasing. In particular, in a 5G environment, miniaturization of the size of the cavity filter on the array antenna is more demanded. This requires the placement of dielectric materials in the cavity to reduce the overall size of the cavity filter. And how to ensure that the dielectric material keeps a stable space position in the resonant cavity, and meanwhile, the installation is simple and convenient, so that the problem to be solved is solved.

In order to reduce the appearance of the whole low-frequency metal resonator, the prior art discloses a low-frequency metal resonator (bulletin number: CN 208157599U), which comprises a shell, a cover plate and a metal resonant column, wherein the shell is provided with an open resonant cavity, the cover plate is detachably connected to the open part of the shell, the metal resonant column is fixed in the resonant cavity of the shell, a tuning screw is arranged on the cover plate, the bottom end of the tuning screw is positioned in a hole of the metal resonant column, and an insulating sleeve is arranged between the outer wall of the tuning screw and the inner wall of the hole of the metal resonant column; the outer wall of the metal resonant column and the inner wall of the resonant cavity are provided with insulating structures. The resonator can effectively reduce the cavity size of the resonant cavity under the same frequency, so that the overall size of the whole low-frequency metal resonator is reduced, the cost can be reduced, the electrical property and the structural property are stable, the implementation is easy, and the operability is high.

However, in this technology, only an insulating structure is provided between the outer wall of the metal resonant column and the inner wall of the resonant cavity, and gaps exist between the upper end surface of the metal resonant column and the inner side surface and the bottom end of the cover plate and the bottom surface of the resonant cavity, so that the metal resonant column may slide up and down, resulting in friction between the metal resonant column and the insulating structure, and the friction may damage the insulating structure and the metal resonant column, so that the service life of the device is low.

Disclosure of Invention

The embodiment of the utility model provides a novel filter, which aims to solve the problems that in the prior art, friction generated between a metal resonant column and an insulating structure is large, so that an insulating member is worn quickly, and the structure of the metal resonant column in a resonant cavity is unstable.

The embodiment of the utility model is realized in such a way, and the novel filter comprises a shell, a cover plate and a metal resonance column, wherein the shell is provided with an open resonance cavity, the cover plate is detachably connected to the opening of the shell, the metal resonance column is fixed in the resonance cavity, the metal resonance column is provided with a concave hole column, the concave hole column is internally provided with a harmonic screw, and the resonance cavity is internally provided with a filling sleeve;

the filling sleeve is provided with an open protection cavity;

the outline of the inner wall of the protection cavity is the same as the outline of the outer side of the metal resonance column, and the metal resonance column is positioned in the protection cavity;

the bottom edge of the filling sleeve is provided with an inwardly extending flanging, and the flanging is sleeved on the bottom edge of the metal resonance column.

Still further, the metal resonance column is provided with a resonance cavity, the upper end face of the filling sleeve is in interference fit with the inner side face of the cover plate, and the flanging is abutted with the bottom face of the resonance cavity.

Still further, the filling sleeve is also provided with a cylindrical concave surface, and the circumferential surface of the filling sleeve is in clearance fit with the inner wall of the resonant cavity.

Further, the filling sleeve is also provided with a cylindrical concave surface, and the cylindrical concave surface extends towards the inside of the protection cavity;

the cylindrical concave surface extends into the concave hole column.

Still further, the cylindrical concave surface has a length less than the length of the concave hole post.

Further, the bottom end of the cylindrical concave surface is provided with an exhaust hole.

Further, a screw hole is formed in the bottom end of the concave hole column, a raised stud is arranged in the resonant cavity, and the stud corresponds to the screw hole in position;

the bolt passes through the screw hole to be matched with the stud, so that the metal resonant column is fixed in the resonant cavity.

Still further, the cover plate is provided with a positioning hole, and the positioning hole corresponds to the position of the concave hole column.

Furthermore, a plurality of connecting holes are annularly distributed at the outer edge of the cover plate, and fixing holes corresponding to the connecting holes are formed in the upper surface of the side face of the shell;

the bolt is fixed in the connecting hole and the fixing hole, and the cover plate and the shell are fixed.

The novel filter has the beneficial effects that the metal resonance column sleeve is positioned in the protection cavity, the outline of the inner wall of the protection cavity is the same as the outline of the outer side of the metal resonance column, the flanging at the bottom edge of the filling sleeve wraps the bottom edge of the metal resonance column, the metal resonance column is covered by the filling sleeve and has good fitting property, the friction generated by the metal resonance column and the filling sleeve is small, the abrasion between the filling sleeve and the metal resonance column is prevented, the service life of equipment is prolonged, and meanwhile, the size of the cavity of the resonance cavity can be effectively reduced, so that the overall size of the whole low-frequency metal resonator is reduced.

Drawings

FIG. 1 is an exploded view of a novel filter provided by an embodiment of the present utility model;

FIG. 2 is a schematic view of a cylindrical concave and concave hole column provided by an embodiment of the present utility model;

FIG. 3 is a full cross-sectional view of a novel filter provided by an embodiment of the present utility model;

fig. 4 is a schematic diagram of the overall structure of the novel filter according to the embodiment of the present utility model;

FIG. 5 is a schematic view of a combination structure of a housing and a cover plate according to an embodiment of the present utility model;

1, a shell; 11. a resonant cavity; 111. a stud; 112. a fixing hole; 12. filling a sleeve; 121. a protective cavity; 122. flanging; 123. a cylindrical concave surface; 124. an exhaust hole; 2. a cover plate; 21. positioning holes; 22. a connection hole; 3. a metal resonant column; 31. a concave hole column; 32. tuning the screw; 311. screw holes.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. Furthermore, it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "left," "right," "horizontal," "top," "bottom," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize applications of other processes and/or usage scenarios for other materials.

Example 1

As shown in fig. 1 to 4, the present embodiment provides a novel filter, which comprises a housing 1, a cover plate 2 and a metal resonant column 3, wherein the housing 1 is provided with an open resonant cavity 11, the cover plate 2 is detachably connected at the open position of the housing 1, the metal resonant column 3 is fixed in the resonant cavity 11 of the housing 1, the metal resonant column 3 is provided with a concave hole column 31, the concave hole column 31 is internally provided with a tuning screw 32, and the resonant cavity 11 is internally provided with a filling sleeve 12;

the filling sleeve 12 is provided with an open protection cavity 121;

the contour of the inner wall of the protection cavity 121 is the same as the contour of the outer side of the metal resonance column 3, and the metal resonance column 3 is positioned in the protection cavity 121;

the bottom edge of the filling sleeve 12 is provided with an inward extending flanging 122, and the flanging 122 is sleeved on the bottom edge of the metal resonance column 3.

In this embodiment, the current passes through the metal resonant column 3, and the metal resonant column 3 and the harmonic screw 32 are matched to resonate signals with a certain frequency of the circuit, so that a certain frequency is selected, and interference noise can be filtered or spectrum analysis can be performed by utilizing the frequency selecting function of the filter.

Specifically, in order to solve the problem that the metal resonant column 3 is unstable in structure in the resonant cavity 11 due to the fact that friction generated between the metal resonant column 3 and the junction structure is large and abrasion of an insulating member is fast. The filling sleeve 12 is sleeved outside the metal resonance column 3, the filling sleeve 12 is integrally formed by PTFE, the metal resonance column 3 can be manufactured in batches, the metal resonance column 3 can be quickly sleeved, the assembly is simple, and the manufacturing cost is low. The inner wall profile of the protection cavity 121 of the filling sleeve 12 is the same as the outer profile of the metal resonance column 3, the flanging 122 at the bottom edge of the filling sleeve 12 wraps the bottom edge of the metal resonance column 3, the metal resonance column 3 is covered by the filling sleeve 12 and has good laminating performance, the friction generated by the metal resonance column 3 and the filling sleeve 12 is small, the service life of the filling sleeve 12 is prolonged, the structural stability of the metal resonance column 3 is ensured, the cavity size of the resonance cavity 11 can be effectively reduced, the overall size of the whole low-frequency metal resonator is reduced, and the product emission power is increased under the condition of limited space.

Example two

As shown in fig. 3, the upper end surface of the filling sleeve 12 is in interference fit with the inner side surface of the cover plate 2, and the flange 122 abuts against the bottom surface of the resonant cavity 11.

Specifically, the filling sleeve 12 is sleeved on the metal resonance column 3, the upper end face of the metal resonance column 3 is covered by the filling sleeve 12, the upper end face of the filling sleeve 12 is in interference fit with the cover plate 2 when the cover plate 2 is covered with the shell 1, the flanging 122 is abutted with the bottom face of the resonance cavity 11, the filling sleeve 12 and the metal resonator are prevented from shaking up and down in the resonance cavity 11, the filling sleeve 12 and the metal resonator are prevented from being worn, and abnormal sounds are avoided in the cavity after the plastic piece is contracted at high and low temperatures.

Example III

As shown in fig. 1 and 3, the circumferential surface of the filling sleeve 12 is in clearance fit with the inner wall of the resonant cavity 11.

Specifically, the filling sleeve 12 of the metal resonant column 3 is sleeved, the circumferential surface of the filling sleeve 12 is in clearance fit with the inner wall of the resonant cavity 11, and thermal expansion of plastics is prevented from jacking the side wall of the cavity, so that the frequency change of a product is too large.

Example IV

As shown in fig. 2, the filling sleeve 12 is further provided with a cylindrical concave surface 123, the cylindrical concave surface 123 extending into the protective cavity 121, the cylindrical concave surface 123 extending into the concave bore post 31.

Specifically, the cylindrical concave 123 extends into the protection cavity 121, and makes full use of the space of the protection cavity 121, so that the structure of the filling sleeve 12 is more compact, the external dimension is smaller, miniaturization of products is realized, and meanwhile, the tuning screw 32 can be closer to tuned current, and the current is tuned through the tuning screw 32.

Example five

As shown in fig. 3, the length of the cylindrical concave 123 is smaller than the length of the concave hole post 31.

Specifically, the length of the cylindrical concave 123 is smaller than that of the concave hole column 31, the filling sleeve 12 is sleeved on the metal resonator, the bottom end of the cylindrical concave 123 is not abutted with the bottom end of the concave hole column 31, interference is not caused on the metal resonance column 3 when the filling sleeve 12 is sleeved on the metal resonance column 3, and the upper end face of the filling sleeve 12 can be attached to the upper end face of the metal resonance column 3.

Example six

As shown in fig. 2, the bottom end of the cylindrical concave 123 is provided with an exhaust hole 124.

Specifically, be equipped with exhaust hole 124 in the bottom of cylindricality concave 123, establish filling sleeve 12 cover on metal resonance post 3, cylindricality concave 123 stretches into in the spill hole post 31, and the air between filling sleeve 12 and the metal resonance post 3 can be followed exhaust hole 124 and discharged, ensures that filling sleeve 12 can closely laminate with metal resonance post 3, simultaneously discharges the air between filling sleeve 12 and the metal resonance post 3 through exhaust hole 124 for filling sleeve 12 cover is established on the metal column more easily.

Example seven

As shown in fig. 2, a screw hole 311 is formed at the bottom end of the concave hole column 31, a raised stud 111 is arranged in the resonant cavity 11, and the stud 111 corresponds to the screw hole 311 in position;

the bolt passes through the screw hole 311 to be matched with the stud 111, so that the metal resonant column 3 is fixed in the resonant cavity 11.

Specifically, the protruding stud 111 in the resonant cavity 11 is internally provided with internal threads, the metal resonant column 3 is placed in the resonant cavity 11, the concave hole column 31 is aligned with the stud 111, the bolt passes through the screw hole 311 from the concave hole column 31 and is screwed with the stud 111, the metal resonant column 3 is fixed in the resonant cavity 11, and the stability of the metal resonant column 3 in the resonant cavity 11 is ensured.

Example eight

As shown in fig. 1 and 5, the cover plate 2 is provided with positioning holes 21, and the positioning holes 21 correspond to the positions of the concave hole columns 31.

Specifically, a locating hole 21 is formed in the center point of the cover plate 2, when the cover plate 2 is covered on the shell 1, the locating hole 21 is aligned with the concave hole column 31, the tuning screw 32 extends into the concave hole column 31 from the locating hole 21, and the tuning screw 32 is fixed on the cover plate 2 through a nut, so that the tuning screw 32 is more convenient and accurate to install.

Example nine

As shown in fig. 1, a plurality of connecting holes 22 are annularly distributed at the outer edge of the cover plate 2, and fixing holes 112 corresponding to the connecting holes 22 are formed in the upper surface of the side edge of the shell 1;

the bolts pass through the connection holes 22 to be connected with the fixing holes 112, and fix the cover plate 2 with the housing 1.

Specifically, the plurality of connecting holes 22 and the plurality of fixing holes 112 are in one-to-one correspondence, and the connecting holes 22 and the fixing holes 112 are screwed by bolts, so that the connection stability of the cover plate 2 and the housing 1 is ensured. The bolt passing through the connecting hole 22 and the fixing hole 112 and the bolt passing through the screw hole 311 and the stud 111 are not the same bolt, but are used to indicate that the connection is performed by the bolt.

According to the novel filter, the metal resonance column 3 is sleeved in the protection cavity 121, the outline of the inner wall of the protection cavity 121 is the same as the outline of the outer side of the metal resonance column 3, the turned-over edge 122 at the bottom edge of the filling sleeve 12 wraps the bottom edge of the metal resonance column 3, the metal resonance column 3 is covered by the filling sleeve 12, the fitting performance is good, friction generated between the metal resonance column 3 and the filling sleeve 12 is small, the service life of the filling sleeve 12 is prolonged, the structural stability of the metal resonance column 3 is ensured, and meanwhile, the size of the cavity of the resonance cavity 11 can be effectively reduced, so that the overall size of the whole low-frequency metal resonator is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The utility model provides a novel filter, includes casing, apron and metal resonance post, the casing is equipped with open-ended resonant cavity, the apron can dismantle the connection the opening part of casing, the metal resonance post is fixed in the resonant cavity, the metal resonance post is equipped with concave hole post, be equipped with the harmonic screw rod in the concave hole post, a serial communication port, include:

a filling sleeve is arranged in the resonant cavity;

the filling sleeve is provided with an open protection cavity;

the outline of the inner wall of the protection cavity is the same as the outline of the outer side of the metal resonance column, and the metal resonance column is positioned in the protection cavity;

the bottom edge of the filling sleeve is provided with an inwardly extending flanging, and the flanging is sleeved on the bottom edge of the metal resonance column.

2. The novel filter of claim 1, wherein the upper end surface of the filling sleeve is in interference fit with the inner side surface of the cover plate, and the flange is abutted with the bottom surface of the resonant cavity.

3. The novel filter of claim 1, wherein the circumferential surface of the filler sleeve is in clearance fit with the inner wall of the resonant cavity.

4. The novel filter of claim 1, wherein the filling sleeve is further provided with a cylindrical concave surface extending into the protective cavity;

the cylindrical concave surface extends into the concave hole column.

5. The novel filter of claim 4, wherein the length of the cylindrical concave surface is less than the length of the concave aperture post.

6. The novel filter of claim 4, wherein said cylindrical concave has a vent at its bottom end.

7. The novel filter of claim 1, wherein a screw hole is formed at the bottom end of the concave hole column, a raised stud is arranged in the resonant cavity, and the stud corresponds to the screw hole in position;

the bolt passes through the screw hole to be matched with the stud, so that the metal resonant column is fixed in the resonant cavity.

8. The novel filter of claim 1, wherein the cover plate is provided with a positioning hole corresponding to the position of the concave hole post.

9. The novel filter according to claim 1, wherein a plurality of connecting holes are annularly distributed on the outer edge of the cover plate, and fixing holes corresponding to the connecting holes are formed in the upper surface of the side edge of the shell;

the bolt is fixed in the connecting hole and the fixing hole, and the cover plate and the shell are fixed.