CN211045675U

CN211045675U - Miniaturized new construction low frequency filter

Info

Publication number: CN211045675U
Application number: CN201922135446.6U
Authority: CN
Inventors: 谭远洋
Original assignee: Meet Communication Equipment Suzhou Co ltd
Current assignee: Meet Communication Equipment Suzhou Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-07-17
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a miniaturized new construction low frequency filter, which comprises a housin, the inside installation cavity of having seted up of casing, the one end of casing is provided with the connector, the casing top is provided with the apron, apron center department is provided with tuning screw, install the resonance bar in the installation cavity, the resonance bar bottom is provided with the sheetmetal, the connector is installed on the casing through a plurality of first screws, shell surface sets up the first mounting hole corresponding with first screw, the utility model discloses an increase the sheetmetal in the below of traditional resonance bar and as extra loading dish, provide extra electric capacity loading for the resonance bar to effectively reduce the frequency of resonance bar under the condition of not increasing volume and sacrificial power, realize the reduction of cost moreover, applicable wide range.

Description

Miniaturized new construction low frequency filter

Technical Field

The utility model relates to a wave filter technical field specifically is a miniaturized new construction low frequency filter.

Background

The filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency. With the development of mobile communication technology, the requirements for filters are higher and higher, such as small size, low cost, high power, high performance, and the like. In particular, the demand for miniaturization of products is becoming more and more widespread. Especially in low-frequency products, the traditional design is too large to meet new market demands. For a long time, people are always exploring how to reduce the volume of low-frequency products, and the technology of winding inductors is pushed out very early, but the final application is very few because the high-performance requirements of mobile communication equipment on filters cannot be met. While recent ceramic loading techniques can greatly reduce the size of the filter, their high cost limits their application range.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniaturized new construction low frequency filter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a miniaturized new construction low frequency filter, includes the casing, the inside installation cavity of having seted up of casing, the one end of casing is provided with the connector, the casing top is provided with the apron, apron center department is provided with tuning screw, install the resonance bar in the installation cavity, resonance bar bottom is provided with the sheetmetal.

Preferably, the connector is mounted on the housing through a plurality of first screws, and first mounting holes corresponding to the first screws are formed in the surface of the housing.

Preferably, the cover plate is mounted on the shell through a plurality of second screws, the second screws are uniformly distributed around the tuning screw rod, and second mounting holes corresponding to the second screws are formed in the upper end face of the shell.

Preferably, the resonance rod comprises a rod body, and a flange is arranged on the periphery of the top end of the rod body.

Preferably, the metal sheet comprises a main body, and an extension ring extending outwards is arranged on the periphery of the bottom end of the main body.

Preferably, a convex column is arranged at the bottom end inside the mounting cavity, the bottom end of the rod body penetrates through the metal sheet and then is pressed on the convex column, and a through hole corresponding to the rod body is formed in the surface of the main body.

Preferably, a plurality of bosses are arranged on the side wall inside the mounting cavity, the extension ring is arranged at the top end of each boss, the metal sheet is mounted in the mounting cavity through a plurality of third screws which are symmetrically distributed, third mounting holes corresponding to the third screws are formed in the surface of each boss, and fourth mounting holes corresponding to the third screws are formed in the surface of the extension ring.

Preferably, the resonance rod is fixedly installed in the installation cavity through a fourth screw, a fifth installation hole corresponding to the fourth screw is formed in the top end of the convex column, and a sixth installation hole corresponding to the fourth screw is formed in the bottom end of the rod body.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an increase the sheetmetal as extra loading dish in the below of traditional resonance bar, provide extra electric capacity loading for the resonance bar to effectively reduce the frequency of resonance bar under the condition that does not increase the volume and sacrifice power, realize the reduction of cost moreover, applicable scope is wide.

Drawings

Fig. 1 is an exploded view of a miniaturized low frequency filter of a new structure;

fig. 2 is a sectional view of a miniaturized low frequency filter of a new structure;

FIG. 3 is a schematic structural diagram of a mounting cavity in a miniaturized low-frequency filter with a new structure;

FIG. 4 is a schematic diagram of a resonant rod of a miniaturized low-frequency filter with a new structure;

fig. 5 is a schematic structural diagram of a metal sheet in a miniaturized low-frequency filter with a new structure.

In the figure: 1-shell, 2-connector, 3-cover plate, 4-tuning screw rod, 5-resonance rod, 6-metal sheet, 7-first screw, 8-second screw, 9-third screw, 10-fourth screw, 11-installation cavity, 12-second installation hole, 13-boss, 14-third installation hole, 15-convex column, 16-fifth installation hole, 17-rod body, 18-flanging, 19-sixth installation hole, 20-main body, 21-through hole, 22-extension ring and 23-fourth installation hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution: the utility model provides a miniaturized new construction low frequency filter, includes

casing

1, 1 inside installation cavity 11 of having seted up of casing, the one end of casing 1 is provided with

connector

2, 1 top of casing is provided with

apron

3, 3 center departments of apron are provided with tuning screw 4, install resonance rod 5 in the

installation cavity

11, 5 bottoms of resonance rod are provided with sheetmetal 6, realize loading electric capacity as loading dish through sheetmetal 6 to can effectively control resonance rod 5 and apron 3, 11 lateral walls in installation cavity and the interval of sheetmetal 6, and then improve the power performance of product.

The connector 2 is mounted on the housing 1 through a plurality of first screws 7, and first mounting holes corresponding to the first screws 7 are formed in the surface of the housing 1.

The cover plate 3 is mounted on the shell 1 through a plurality of second screws 8, the second screws 8 are uniformly distributed around the tuning screw rod 4, and second mounting holes 12 corresponding to the second screws 8 are formed in the upper end face of the shell 1.

The resonance rod 5 comprises a rod body 17, and a flange 18 is arranged on the periphery of the top end of the rod body 17.

The metal sheet 6 comprises a main body 20, an extension ring 22 extending outwards is arranged on the periphery of the bottom end of the main body 20, and the metal sheet 6 is manufactured by adopting a metal sheet stamping process and is low in cost.

The bottom end in the installation cavity 11 is provided with a convex column 15, the bottom end of the rod body 17 penetrates through the metal sheet 6 and then is pressed on the convex column 15, and the surface of the main body 20 is provided with a through hole 21 corresponding to the rod body 17.

The metal sheet installation structure is characterized in that a plurality of bosses 13 are arranged on the side wall inside the installation cavity 11, the extension ring 22 is arranged at the top ends of the bosses 13, the metal sheet 6 is installed in the installation cavity 11 through a plurality of third screws 9 which are symmetrically distributed, third installation holes 14 corresponding to the third screws 9 are formed in the surface of each boss 13, and fourth installation holes 23 corresponding to the third screws 9 are formed in the surface of the extension ring 22.

The resonance rod 5 is fixedly installed in the installation cavity 11 through a fourth screw 10, a fifth installation hole 16 corresponding to the fourth screw 10 is formed in the top end of the convex column 15, a sixth installation hole 19 corresponding to the fourth screw 10 is formed in the bottom end of the rod body 17, and reasonable intervals are kept between the upper end face of the convex column 15 and the lower surface of a turned edge 18 at the top end of the resonance rod 5 and between the side face of the convex column 15 and the inner side face of the turned edge at the top end of the resonance rod 5, so that needed capacitance loading is formed to reduce resonance frequency.

The utility model discloses a theory of operation: the utility model discloses an increase the sheetmetal as extra loading dish in the below of traditional resonance bar, provide extra electric capacity loading for the resonance bar to effectively reduce the frequency of resonance bar under the condition that does not increase the volume and sacrifice power, realize the reduction of cost moreover, applicable scope is wide.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A miniaturized new construction low frequency filter, includes casing (1), its characterized in that: casing (1) inside has been seted up installation cavity (11), the one end of casing (1) is provided with connector (2), casing (1) top is provided with apron (3), apron (3) center department is provided with tuning screw (4), install resonance bar (5) in installation cavity (11), resonance bar (5) bottom is provided with sheetmetal (6).

2. A miniaturized new structure low frequency filter according to claim 1, characterized in that: the connector (2) is installed on the shell (1) through a plurality of first screws (7), and first installation holes corresponding to the first screws (7) are formed in the surface of the shell (1).

3. A miniaturized new structure low frequency filter according to claim 1, characterized in that: the cover plate (3) is installed on the shell (1) through a plurality of second screws (8), the second screws (8) are uniformly distributed around the tuning screw rods (4), and second installation holes (12) corresponding to the second screws (8) are formed in the upper end face of the shell (1).

4. A miniaturized new structure low frequency filter according to claim 1, characterized in that: the resonance rod (5) comprises a rod body (17), and a flanging (18) is arranged on the periphery of the top end of the rod body (17).

5. A miniaturized new structure low frequency filter according to claim 4, characterized in that: the metal sheet (6) comprises a main body (20), and an extension ring (22) extending outwards is arranged on the periphery of the bottom end of the main body (20).

6. A miniaturized new structure low frequency filter according to claim 5, characterized in that: the mounting cavity (11) is provided with boss (15) in inside bottom, the bottom of the body of rod (17) is passed through sheetmetal (6) and is pressed on boss (15), through-hole (21) corresponding with the body of rod (17) have been seted up on main part (20) surface.

7. A miniaturized new structure low frequency filter according to claim 6, characterized in that: be provided with a plurality of bosss (13) on the inside lateral wall of installation cavity (11), extension ring (22) set up on boss (13) top, sheetmetal (6) are installed in installation cavity (11) through third screw (9) of a plurality of symmetric distributions, third mounting hole (14) corresponding with third screw (9) are seted up on boss (13) surface, fourth mounting hole (23) corresponding with third screw (9) are seted up on extension ring (22) surface.

8. A miniaturized new structure low frequency filter according to claim 7, characterized in that: resonance bar (5) are through fourth screw (10) fixed mounting in installation cavity (11), fifth mounting hole (16) corresponding with fourth screw (10) have been seted up to convex column (15) top, sixth mounting hole (19) corresponding with fourth screw (10) have been seted up to body of rod (17) bottom.