Composite crystal filter

Abstract

The utility model relates to the field of crystal filters, in particular to a composite crystal filter, which comprises a filter shell used for providing protection capability for internal components and a fixed clamping groove arranged inside the filter shell and used for being connected with an upper shell cover, and a fixed clamping block is movably connected inside the fixed clamping groove. According to the utility model, the fixing clamping groove, the fixing clamping block, the upper shell cover, the inner sealing groove, the moisture-proof sealing ring and the edge sealing joint strip are arranged, so that when the device is used for production and installation, other components can be installed in the filter shell; the upper shell cover and the filter shell are assembled through the fixing clamping grooves and the fixing clamping blocks to complete production of the composite crystal filter, and then the stability of connection between the upper shell cover and the filter shell is enhanced through the outer fastening bolts and the edge sealing joint strips. And in addition, in-time disassembly and maintenance can be conveniently carried out when internal components break down.

Description

Technical Field

[0001] The utility model relates to the field of crystal filters, and particularly relates to a composite crystal filter. Background Technique

[0002] A crystal filter is an electronic filter mainly composed of a crystal resonator and a filter circuit. Its working principle is to use the resonant frequency of the crystal oscillator to select signals of specific frequencies and amplify them, while signals of other frequencies will be weakened or blocked. Crystal filters are superior to filters composed of traditional LC resonant circuits in terms of frequency selectivity, frequency stability, transition band steepness, and insertion loss. Therefore, crystal filters have been widely used in electronic devices such as communication, navigation, and measurement, and the composite crystal filter also belongs to one type of crystal filter.

[0003] After retrieval, a filter with the publication number CN219643095U specifically discloses a filter, including a dielectric substrate, a ground plane, and a conductive strip. The ground plane and the conductive strip are respectively arranged on the dielectric substrate. At least one conductive strip is connected to the ground plane through a plurality of grounding holes arranged on the dielectric substrate to achieve grounding, and the sum of the maximum dimensions of the cross-sections of all the grounding holes connected to the conductive strip in the width direction is greater than 1 / 3 of the width of the resonant metal conductive strip, which can effectively improve the Q value, is easy to process, and can withstand higher power.

[0004] During the use of the existing composite crystal filter, due to the cumbersome installation method of the overall composite crystal filter, it is necessary to weld the shell and the cover after the internal components are installed. This not only delays production and use time, but also there is no other quick connection and installation method in the above comparative case. This is not only inconvenient for subsequent maintenance and secondary use, but also the composite crystal filter lacks sealing means, which will also affect the normal operation of the internal components when used in an environment with a lot of water vapor.

[0005] Therefore, it is very necessary to invent a composite crystal filter to solve the above problems. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a composite crystal filter. The installation method of the composite crystal filter realized through the fixed card slots, fixed card blocks, upper shell cover, inner sealing groove, moisture-proof sealing ring and edge sealing tape is not only simple and rapid in operation, but also convenient for timely disassembly and maintenance when internal components fail, saving the installation cost. At the same time, the moisture-proof sealing ring arranged inside the upper shell cover can also provide a certain sealing ability for the composite crystal filter inside the upper shell cover and the filter housing, reducing the effect that when used in an environment with a lot of water vapor, water vapor enters from the connection between the upper shell cover and the filter housing, thus affecting the normal use of internal components. To solve the problems in the prior art that during the use of the composite crystal filter, due to the cumbersome installation method of the overall composite crystal filter, it is necessary to weld the housing and the shell cover after the internal components are installed, which not only delays production and use time, and there is no other quick connection and installation method in the above comparative case, which is not only inconvenient for subsequent maintenance and secondary use, but also the composite crystal filter lacks sealing means, and when used in an environment with a lot of water vapor, it will also affect the normal operation of internal components.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions: A composite crystal filter, including a filter housing for providing protection for internal components;

[0008] Fixed card slots are opened inside the filter housing for connecting with the upper shell cover. A fixed card block is movably connected inside the fixed card slots, and one end of the fixed card block is fixedly installed with an upper shell cover;

[0009] An inner sealing groove is opened inside the upper shell cover for installing a sealing ring, and a moisture-proof sealing ring is arranged inside the inner sealing groove. An information nameplate is fixedly installed above the upper shell cover, and an outer fastening bolt penetrates through the outside of the upper shell cover. One end of the outer fastening bolt is movably connected with an edge sealing tape.

[0010] Preferably, a bottom end plate is fixedly installed at the bottom of the filter housing, and a positioning installation groove is opened on the upper surface of the bottom end plate.

[0011] Preferably, the fixed card block fixedly installed at the bottom of the upper shell cover is snap-fitted with the fixed card slots opened inside the filter housing, and the fixed card block and the fixed card slots are used in cooperation.

[0012] Preferably, the moisture-proof sealing ring is movably connected with the upper shell cover, and the outer fastening bolts are symmetrically arranged with respect to the central axis of the edge sealing tape.

[0013] Preferably, a wiring terminal is fixedly installed outside the filter housing, an inner connection resistor piece is arranged inside the wiring terminal, a fixing bolt penetrates through above the wiring terminal, and one end of the fixing bolt is movably connected with an upper metal pressing patch.

[0014] Preferably, the upper metal pressing patch is movably connected to the terminal, and the terminals are equally spaced on the filter housing.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0016] The present utility model is provided with a fixed card slot, a fixed card block, an upper shell cover, an inner sealing groove, a moisture-proof sealing ring and a sealing strip. When using the device for production and installation work, after other components are installed inside the filter housing, the upper shell cover and the filter housing can be assembled through the fixed card slot and the fixed card block to complete the production of the composite crystal filter. Then, the stability of the connection between the upper shell cover and the filter housing is enhanced through the external fastening bolts and the sealing strip. Such an installation method is not only simple and rapid in operation, but also convenient for disassembly and maintenance in time when internal components fail, saving the installation cost. At the same time, the moisture-proof sealing ring provided inside the upper shell cover can also provide a certain sealing ability for the composite crystal filter inside the upper shell cover and the filter housing, reducing the problem that the composite crystal filter enters water vapor from the connection between the upper shell cover and the filter housing in an environment with a lot of water vapor, thus affecting the normal use of internal components.

[0017] The present utility model is provided with a filter housing, terminals, internal connection resistor sheets, fixing bolts and upper metal pressing patches. When connecting the device to the wire body of an external device, one end of the connecting wire can be directly inserted into the terminal, and then the fixing bolt is tightened to press down the upper metal pressing patch. The upper metal pressing patch is used to connect one end of the connecting wire to the internal connection resistor sheet. Such an installation method is not only simple and convenient, avoiding the unstable installation method of winding the copper wire of the connecting wire around the internal connection resistor sheet, but also improving the stability when the composite crystal filter is connected to other devices. The terminal can also provide a certain protection ability for the connection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the positioning installation groove structure of the present utility model;

[0021] Figure 3Schematic diagram of the moisture-proof sealing ring structure of the present utility model;

[0022] Figure 4 Schematic diagram of the edge-sealing strip structure of the present utility model;

[0023] Figure 5 Schematic diagram of the wiring terminal structure of the present utility model.

[0024] Description of the reference numerals:

[0025] 1. Filter housing; 2. Bottom end plate; 3. Positioning installation groove; 4. Fixed clamping groove; 5. Fixed clamping block; 6. Upper shell cover; 7. Inner sealing groove; 8. Moisture-proof sealing ring; 9. Information nameplate; 10. Outer fastening bolt; 11. Edge-sealing strip; 12. Wiring terminal; 13. Inner connecting resistance piece; 14. Fixed bolt; 15. Upper metal pressing patch. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0027] The present utility model provides a Figures 1-5 composite crystal filter as shown in the figure, including a filter housing 1 for providing protection for internal components;

[0028] A fixed clamping groove 4 is opened inside the filter housing 1 for connecting with the upper shell cover 6. A fixed clamping block 5 is movably connected inside the fixed clamping groove 4, and one end of the fixed clamping block 5 is fixedly installed with an upper shell cover 6;

[0029] An inner sealing groove 7 is opened inside the upper shell cover 6 for installing a sealing ring, and a moisture-proof sealing ring 8 is arranged inside the inner sealing groove 7. An information nameplate 9 is fixedly installed above the upper shell cover 6, and an outer fastening bolt 10 penetrates through the outside of the upper shell cover 6. One end of the outer fastening bolt 10 is movably connected with an edge-sealing strip 11. The upper shell cover 6 and the filter housing 1 are assembled through the fixed clamping groove 4 and the fixed clamping block 5 to complete the production of the composite crystal filter. Then, the stability of the connection between the upper shell cover 6 and the filter housing 1 is enhanced through the outer fastening bolt 10 and the edge-sealing strip 11. Such an installation method is not only simple and rapid in operation, but also convenient for timely disassembly and maintenance when internal components fail, saving the installation cost.

[0030] As Figure 1 、 Figure 2 and Figure 3As shown, a bottom end plate 2 is fixedly installed at the bottom of the filter housing 1. A positioning installation groove 3 is provided on the upper surface of the bottom end plate 2. The bottom end plate 2 and the positioning installation groove 3 facilitate the installation of the composite crystal filter in different environments. A fixed clamping block 5 fixedly installed at the bottom of the upper shell cover 6 is engaged with a fixed clamping groove 4 provided inside the filter housing 1. The fixed clamping block 5 and the fixed clamping groove 4 are used in cooperation. The upper shell cover 6 and the filter housing 1 are assembled through the fixed clamping groove 4 and the fixed clamping block 5 to complete the production and assembly work of the composite crystal filter. A moisture-proof sealing ring 8 is movably connected to the upper shell cover 6. The outer fastening bolts 10 are symmetrically arranged with respect to the central axis of the edge-sealing strip 11. The outer fastening bolts 10 and the edge-sealing strip 11 enhance the connection stability between the upper shell cover 6 and the filter housing 1.

[0031] As Figure 1 , Figure 4 and Figure 5 shown, a wiring terminal 12 is fixedly installed on the outside of the filter housing 1. An internal connection resistor sheet 13 is provided inside the wiring terminal 12. A fixing bolt 14 penetrates through the upper part of the wiring terminal 12. One end of the fixing bolt 14 is movably connected to an upper metal pressing patch 15. The wiring terminal 12 itself has a certain protection ability and can provide a certain protection ability to the connection between this device and other devices. The upper metal pressing patch 15 is movably connected to the wiring terminal 12. The wiring terminals 12 are evenly distributed on the filter housing 1. One end of a connecting wire can be directly inserted into the wiring terminal 12, and then the fixing bolt 14 is tightened to press down the upper metal pressing patch 15. One end of the connecting wire is connected to the internal connection resistor sheet 13 through the upper metal pressing patch 15. Such an installation method is simple and convenient.

[0032] Working principle of this utility model: First, select a suitable installation position for this composite crystal filter. First, install this composite crystal filter in different environments through the bottom plate 2 and the positioning installation groove 3. Then, install other filter components inside the filter housing 1. Assemble the upper shell cover 6 and the filter housing 1 through the fixed card slot 4 and the fixed card block 5 to complete the assembly work of this composite crystal filter. Then, further strengthen the stability of the connection between the upper shell cover 6 and the filter housing 1 through the external fastening bolts 10 and the edge sealing strip 11. Subsequently, the moisture-proof sealing ring 8 provided inside the upper shell cover 6 can also provide a certain sealing ability for this composite crystal filter inside the upper shell cover 6 and the filter housing 1, reducing the problem that when used in an environment with a lot of water vapor, water vapor enters from the connection between the upper shell cover 6 and the filter housing 1 and affects the normal use of the internal components. After the installation work is completed like this, the device that needs to filter signals can be connected to this composite crystal filter. Then, directly insert one end of the connection wire into the wiring terminal 12, and then tighten the fixed bolt 14 to press down the upper metal pressing patch 15. Connect one end of the connection wire to the internal connection resistance piece 13 through the upper metal pressing patch 15. After the docking is completed like this, the external power supply can be started to allow this composite crystal filter to normally perform signal filtering work. Finally, after completing all the installation and use work of this composite crystal filter according to the above operations, maintain this device daily. If it is not used for a long time, just cut off the external power supply. Just like this, the use process of this composite crystal filter is completed.

[0033] Only some exemplary embodiments of the present utility model are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A composite crystal filter, characterized in that: including a filter housing (1) for providing protection for internal components; a fixed card slot (4) opened inside the filter housing (1) for connecting with an upper shell cover (6). A fixed card block (5) is movably connected inside the fixed card slot (4), and one end of the fixed card block (5) is fixedly installed with the upper shell cover (6); an inner sealing groove (7) is opened inside the upper shell cover (6) for installing a sealing ring, and a moisture-proof sealing ring (8) is arranged inside the inner sealing groove (7). An information nameplate (9) is fixedly installed above the upper shell cover (6), and an outer fastening bolt (10) penetrates through the outside of the upper shell cover (6). One end of the outer fastening bolt (10) is movably connected with a sealing strip (11).

2. The composite crystal filter according to claim 1, wherein: A bottom end plate (2) is fixedly installed at the bottom of the filter housing (1), and a positioning installation groove (3) is opened on the upper surface of the bottom end plate (2).

3. A composite crystal filter according to claim 1, wherein: The fixed card block (5) fixedly installed at the bottom of the upper shell cover (6) is snap-fitted with the fixed card slot (4) opened inside the filter housing (1), and the fixed card block (5) and the fixed card slot (4) are used in cooperation.

4. A composite crystal filter according to claim 1, characterized in that: The moisture-proof sealing ring (8) is movably connected with the upper shell cover (6), and the outer fastening bolts (10) are symmetrically arranged with respect to the central axis of the sealing strip (11).

5. A composite crystal filter according to claim 1, wherein: A wiring terminal (12) is fixedly installed outside the filter housing (1). An inner connection resistor sheet (13) is arranged inside the wiring terminal (12). A fixing bolt (14) penetrates through above the wiring terminal (12), and one end of the fixing bolt (14) is movably connected with an upper metal pressing patch (15).

6. The composite crystal filter according to claim 5, characterized in that: The upper metal pressing patch (15) is movably connected with the wiring terminal (12), and the wiring terminals (12) are equally spaced on the filter housing (1).

Images