Impedance adjusting type filter

Abstract

The utility model discloses an impedance adjusting type filter, comprising a housing, the housing is in a cuboid hollow type design, the housing is internally provided with a circuit board, the side surface of the circuit board is attached to the inner surface of the housing, the outer surfaces of the two sides of the circuit board are provided with metal contacts, the housing is internally provided with a fast plug mechanism, and the fast plug mechanism is connected with the circuit board. Different impedance coils can be replaced through the quick plug mechanism so as to meet the filtering requirements of different circuits. When the impedance adjusting type filter is installed, a line can pass through the circuit board only by inserting a quick-connection cable into the wiring pins, then the filter inductance coil box is inserted into the quick-insertion base, the circuit is measured, the circuit reaches the optimal frequency band by replacing the filter inductance coil box, and then the bottom plate is inserted into the shell, so that the impedance adjusting type filter is installed. Therefore, the circuit can filter non-sine waves through the circuit board and the filter inductance coil box, filters needing to be carried are greatly reduced, and a large amount of space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an impedance-adjustable filter. Background Art

[0002] With the development of science and technology, people's living standards are constantly improving, resulting in a large number of tools and equipment that need to use electricity. Electricity is becoming more and more important in people's lives. Electrical appliances such as airplanes, high-speed trains, and electric cars, as well as mobile phones and light bulbs, are all inseparable from electricity. However, various types of electrical equipment are not all linear load appliances, so they will more or less generate certain harmonics when used. These harmonics will have a great impact on precision electrical equipment, causing unstable operation of the equipment. For this reason, it is necessary to filter the non-sinusoidal waves in the electric furnace, but the impedance of many electrical equipment is different, and different types of filters need to be purchased to remove specific waveforms;

[0003] The existing patent document with the technical disclosure number CN219394803U provides a filter, including an upper cover, a lower cover, a grounding component and a filter component. The installation space formed between the upper cover and the lower cover is divided by a plurality of partitions to form a first installation area for installing the filter component and a second installation area for installing the grounding component. The first installation area is surrounded by two first partitions relatively arranged on the top edge of the lower cover, and the second installation area is separated by a second partition installed on the lower cover below the first installation area, and the second partition is in an inverted "L" shape. The first installation area is surrounded by the two first partitions, the second partition and the top edge of the lower cover to form a separate space for placing and installing the filter component, and the second installation area is surrounded by the second partition, the bottom edge of the lower cover and the two side edges of the lower cover to form a separate space for placing and installing the grounding component;

[0004] With respect to the above-mentioned related technology, the inventors found that the technology has at least the following problems: the inductor in the above-mentioned patent document cannot be replaced and adjusted, resulting in the need to carry different types of filters when replacing or repairing, which greatly occupies the portable space. Utility Model Content

[0005] The utility model aims to provide an impedance-adjustable filter to solve the problem in the background art that the filter inductance cannot be adjusted and multiple models need to be carried, which takes up a lot of space.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an impedance-adjustable filter, comprising a shell, the shell being a rectangular hollow design, and fixing ears are fixedly installed on the outer surfaces of both sides of the shell, side through holes are penetrated through the outer surfaces of both sides of the shell, and a bottom plate is installed at one end of the shell away from the side through holes, and the outer surface of the bottom plate is fitted with the inner surface of the shell, a circuit board is arranged inside the shell, and the side surface of the circuit board is fitted with the inner surface of the shell, and metal contacts are arranged on the outer surfaces of both sides of the circuit board, and a quick-insertion mechanism is arranged inside the shell, and different impedance coils can be replaced by the quick-insertion mechanism to meet the filtering requirements of different circuits.

[0007] Preferably, the quick-insert mechanism includes: a quick-insert base, which is snap-fitted and installed on the side surface of the circuit board, and the pins of the quick-insert base penetrate the outer surface of the circuit board, and a filter inductor box is inserted into the outer surface of one end of the quick-insert base away from the circuit board, and the filter inductor box is located inside the shell.

[0008] By adopting the above technical solution, the filter inductor coil box with the required impedance is taken out according to the waveform of the circuit and inserted into the quick-plug base. The engagement between the quick-plug base and the circuit board can prevent the quick-plug base and the circuit board from being desoldered when the filter inductor coil box is pulled out. The filter inductor coil boxes with different impedances can be inserted into the housing, so that the line is filtered through the circuit board, the impedance of the circuit is adjusted, a large number of filters are reduced, and a large amount of space is saved.

[0009] Preferably, a threaded mechanism is provided between the housing and the side through hole, and the circuit board is connected and fixed via the threaded mechanism.

[0010] By adopting the above technical solution, the circuit board is supported by the support column and fixed by the fixing clamping block, so that the filter is extremely easy to maintain and assemble.

[0011] Preferably, the threaded mechanism comprises: a support column, which is fixedly mounted on the inner surface of an end of the shell away from the bottom plate, and the outer surface of one end of the support column fits with the outer surface of the circuit board, a fixed clamping block is slidably mounted inside the side through hole, and one end of the fixed clamping block fits with the side surface of the circuit board, an elastic contact pin is fixedly mounted on one end of the fixed clamping block close to the circuit board, and the outer surface of the elastic contact pin fits with the metal contact, a wiring pin is fixedly mounted on one end of the fixed clamping block away from the quick-plug base, and the wiring pin is connected to the elastic contact pin, a buckle button is threadedly mounted on the outer surface of the side through hole, and one end of the buckle button fits with the side surface of the fixed clamping block, the wiring pin and the side through hole are concentrically designed, and a quick-connect cable is inserted into the outer surface of the wiring pin, and one end of the quick-connect cable is located on the inner side of the buckle button.

[0012] By adopting the above technical solution, the fixed snap block is inserted into the side through hole to fix the circuit board, and the circuit board is connected to the wiring pins through the contact between the elastic contact pins and the metal contacts, so that the quick-connect cable can be inserted into the wiring pins conveniently, so that the filter can be quickly connected to the circuit. At the same time, when the wiring pins are damaged, the rotary button can be unscrewed to take out the fixed snap block for replacement.

[0013] Preferably, a clamping mechanism is provided at one end of the bottom plate located inside the shell, and the filter inductor coil box is stably fixed on the bottom plate by the clamping mechanism, so that the filter inductor coil box can be accurately inserted into the quick-insert base.

[0014] By adopting the above technical solution, the filter inductor coil box can be taken out when the bottom plate is removed, so that the filter inductor coil box can be accurately inserted into the quick-insert base to prevent the pins of the filter inductor coil box from being damaged.

[0015] Preferably, the locking mechanism includes: a side fixing plate, which is fixedly mounted on one end of the base plate located inside the shell, and the side fixing plate can be slightly deformed, and a wedge-shaped block protrusion is provided at one end of the side fixing plate away from the base plate, the side fixing plate is locked with the filter inductor box, and the outer surface of the filter inductor box is in contact with the outer surface of the side fixing plate, and the side fixing plate and the filter inductor box are concentrically designed.

[0016] By adopting the above technical solution, the filter inductor coil box can be fixed on the side surface of the bottom plate through the wedge-shaped protrusion of the side fixing plate, so that the filter inductor coil box can be pressed after the bottom plate is inserted into the shell, which is convenient for positioning the quick-plug base and the filter inductor coil box. At the same time, the shell is fixed by the fixing ears so that the bottom plate is attached to the fixing surface, thereby preventing the quick-plug base and the filter inductor coil box from poor contact and falling off.

[0017] Preferably, a disassembly groove is provided on the side surface of the base plate, and a spherical protrusion is fixedly installed on the outer surface of the base plate near the disassembly groove, an insertion groove is provided on the inner surface of one end of the shell near the fixing ear, and the insertion groove is engaged with the spherical protrusion, and disassembly protrusion grooves are provided on the inner surfaces of both sides of the shell near the fixing ear, and the disassembly protrusion grooves are higher than the height of the disassembly groove.

[0018] By adopting the above technical solution, when the filter inductor coil box needs to be replaced, it is only necessary to insert the tool into the disassembly groove and use the side surface of the disassembly protrusion groove as a fulcrum to lift the bottom plate, so that the spherical protrusion and the fitting groove can be disengaged, and the bottom plate with the filter inductor coil box can be taken out.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the impedance-adjustable filter:

[0020] 1. When installation is required, you only need to insert the quick-connect cable into the wiring pin to make the line pass through the circuit board, then insert the filter inductor box into the quick-connect base, and measure the circuit. By replacing the filter inductor box, the circuit can reach the best frequency band, and then insert the bottom plate into the shell to make the circuit pass through the circuit board. The filter inductor box can filter non-sinusoidal waves, which greatly reduces the filters that need to be carried and saves a lot of space;

[0021] 2. After long-term use, the filter inductor coil box will age. At this time, a flat-blade screwdriver can be inserted into the disassembly groove, and the side surface of the disassembly protrusion groove can be used as a fulcrum to tilt the bottom plate, so that the spherical protrusion and the fitting groove can be disengaged. The filter inductor coil box can be taken out through the engagement of the side fixing plate and the filter inductor coil box, which is convenient for taking out the filter inductor coil box for replacement. After that, a new filter inductor coil box is inserted into the side fixing plate, and the bottom plate is inserted back into the shell. The bottom plate and the shell are positioned so that the filter inductor coil box is directly inserted into the quick-insert base, which reduces the alignment of the filter inductor coil box when it is inserted, prevents the pins of the filter inductor coil box from being damaged, and facilitates the removal of the filter inductor coil box;

[0022] 3. When it is necessary to maintain or replace the wiring pins or circuit boards, you only need to unscrew the knob and pull out the fixed clamping block to disengage the fixed clamping block from the circuit board and the elastic contact pin from the metal contact. After that, you can replace the damaged wiring pin as a whole or overhaul the circuit board, which is convenient for maintenance, inspection and assembly of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the housing and the fixing ears of the utility model;

[0024] Figure 2 This is a schematic diagram of the cutaway three-dimensional structure of the housing and the fixed ears of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the shell and the rotary button of the utility model in a cutaway view;

[0026] Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the circuit board and the fixed engaging block of the utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the circuit board, quick-plug base and filter inductor coil box of the utility model;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the filter inductor coil box and the bottom plate of the utility model.

[0029] In the figure: 1. housing; 2. fixing ears; 3. side through holes; 4. support columns; 5. circuit boards; 6. metal contacts; 7. fixing snap-fit ​​blocks; 8. elastic contact pins; 9. wiring pins; 10. twist-buttons; 11. quick-connect cables; 12. quick-plug bases; 13. filter inductor coil boxes; 14. bottom plates; 15. side fixing plates; 16. disassembly grooves; 17. spherical protrusions; 18. fitting grooves; 19. disassembly protrusion grooves. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-6 The utility model provides a technical solution: an impedance-adjustable filter, comprising a shell 1, the shell 1 is a rectangular hollow design, and the outer surfaces of both sides of the shell 1 are fixedly installed with fixing ears 2, the outer surfaces of both sides of the shell 1 are penetrated with side through holes 3, and a bottom plate 14 is installed at one end of the shell 1 away from the side through holes 3, and the outer surface of the bottom plate 14 is in contact with the inner surface of the shell 1, a circuit board 5 is arranged inside the shell 1, and the side surface of the circuit board 5 is in contact with the inner surface of the shell 1, and metal contacts 6 are arranged on the outer surfaces of both sides of the circuit board 5, and a quick-insertion mechanism is arranged inside the shell 1, through which different impedance coils can be replaced to meet the filtering requirements of different circuits, the quick-insertion mechanism comprises: a quick-insertion base 12, the quick-insertion base 12 is snap-fitted and installed on the side surface of the circuit board 5, and the pins of the quick-insertion base 12 penetrate the outer surface of the circuit board 5, and a filter inductor coil box 13 is inserted on the outer surface of the end of the quick-insertion base 12 away from the circuit board 5, and the filter inductor coil box 13 is located inside the shell 1.

[0032] When installing the filter, you only need to insert the quick-connect cable 11 into the wiring pin 9 to connect the circuit board 5 to the circuit, insert the filter inductor box 13 into the quick-connect base 12, and then replace the most suitable filter inductor box 13 through instrument observation to adjust the impedance of the circuit to the most suitable end. Then, cover the bottom plate 14 back to the outer shell 1 to complete the installation of the filter. The less portable filter saves a lot of space.

[0033] A threaded mechanism is provided between the housing 1 and the side through hole 3, and the circuit board 5 is connected and fixed by the threaded mechanism. The threaded mechanism includes: a support column 4, which is fixedly mounted on the inner surface of one end of the housing 1 away from the bottom plate 14, and the outer surface of one end of the support column 4 is in contact with the outer surface of the circuit board 5. A fixed snap-fit ​​block 7 is slidably installed inside the side through hole 3, and one end of the fixed snap-fit ​​block 7 is snap-fitted with the side surface of the circuit board 5, and an elastic spring is fixedly mounted on the end of the fixed snap-fit ​​block 7 close to the circuit board 5. The outer surface of the elastic contact pin 8 is fitted with the metal contact 6, and the end of the fixed clamping block 7 away from the quick-plug base 12 is fixedly installed with a wiring pin 9, and the wiring pin 9 is connected to the elastic contact pin 8, the outer surface of the side through hole 3 is threadedly installed with a turn button 10, and one end of the turn button 10 is fitted with the side surface of the fixed clamping block 7, the wiring pin 9 is concentric with the side through hole 3, and the outer surface of the wiring pin 9 is inserted with a quick-connect cable 11, and one end of the quick-connect cable 11 is located on the inner side of the turn button 10.

[0034] When the filter needs to be repaired, it is only necessary to unplug all the quick-connect cables 11, take out the shell 1, and unscrew the knob 10 from the side through hole 3, so that the wiring pin 9 can be taken out, the fixed engaging block 7 is disengaged from the circuit board 5, and the elastic contact pin 8 is disengaged from the metal contact 6. After the repair is completed, it is only necessary to put the circuit board 5 back into the shell 1, support and position the circuit board 5 through the support column 4, so that the fixed engaging block 7 can be accurately inserted into the side surface of the circuit board 5, and the fixed engaging block 7 is squeezed by screwing in the knob 10, so that the elastic contact pin 8 is inserted into the circuit board 5 and connected with the metal contact 6, which is convenient for repairing the circuit board 5. At the same time, the wiring pin 9 can be easily replaced after being damaged, and the entire filter will not be scrapped.

[0035] A clamping mechanism is provided at one end of the bottom plate 14 located inside the shell 1, and the filter inductor coil box 13 is stably fixed on the bottom plate 14 through the clamping mechanism, so that the filter inductor coil box 13 can be accurately inserted into the quick-insert base 12, and the clamping mechanism includes: a side fixing plate 15, the side fixing plate 15 is fixedly installed at one end of the bottom plate 14 located inside the shell 1, and the side fixing plate 15 can be slightly deformed, and a wedge-shaped block protrusion is provided at one end of the side fixing plate 15 away from the bottom plate 14, the side fixing plate 15 is clamped with the filter inductor coil box 13, and the outer surface of the filter inductor coil box 13 is in contact with the outer surface of the side fixing plate 15, and the side fixing plate 15 and the filter inductor coil box 13 are concentrically designed.

[0036] The support column 4 can support the circuit board 5 to prevent the circuit board 5 from bending and deforming when the filter inductor coil box 13 is inserted into the quick-plug base 12, thereby forming component cold soldering. At the same time, the side fixing plate 15 is engaged with the filter inductor coil box 13, so that after the subsequent filter inductor coil box 13 ages, the filter inductor coil box 13 can be taken out together with the bottom plate 14. At the same time, when replacing a new filter inductor coil box 13, the filter inductor coil box 13 can be accurately inserted into the quick-plug base 12 through the positioning of the shell 1 and the bottom plate 14, so as to prevent the pins of the filter inductor coil box 13 from being damaged, and facilitate the installation and removal of the filter inductor coil box 13.

[0037] A disassembly groove 16 is provided on the side surface of the bottom plate 14, and a spherical protrusion 17 is fixedly installed on the outer surface of the bottom plate 14 near the disassembly groove 16. An insertion groove 18 is provided on the inner surface of one end of the shell 1 near the fixing ear 2, and the insertion groove 18 is engaged with the spherical protrusion 17. Disassembly protrusion grooves 19 are provided on the inner surfaces of both sides of the shell 1 near the fixing ear 2, and the disassembly protrusion grooves 19 are higher than the height of the disassembly groove 16.

[0038] By removing the screws from the fixing ears 2, the housing 1 can be detached from the fixed object, and then a flat-blade screwdriver is inserted into the disassembly groove 16. Using the disassembly protrusion groove 19 as a fulcrum, the spherical protrusion 17 can be detached from the fitting groove 18, and the bottom plate 14 can be tilted out to replace the aged filter inductor coil box 13.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impedance-adjustable filter, comprising a housing (1), the housing (1) being of a rectangular hollow design, and fixing ears (2) being fixedly mounted on both side outer surfaces of the housing (1), side through holes (3) being provided through both side outer surfaces of the housing (1), and a bottom plate (14) being mounted on one end of the housing (1) away from the side through holes (3), and the outer surface of the bottom plate (14) being in contact with the inner surface of the housing (1), a circuit board (5) being arranged inside the housing (1), and the side surface of the circuit board (5) being in contact with the inner surface of the housing (1), and metal contacts (6) being arranged on both side outer surfaces of the circuit board (5), Features: A quick-insertion mechanism is provided inside the housing (1), and different impedance coils can be replaced by the quick-insertion mechanism to meet the filtering requirements of different circuits; The quick-insertion mechanism comprises a quick-insertion base (12), the quick-insertion base (12) being snap-fitted and mounted on the side surface of the circuit board (5), and the pins of the quick-insertion base (12) passing through the outer surface of the circuit board (5), a filter inductor coil box (13) being inserted into the outer surface of one end of the quick-insertion base (12) away from the circuit board (5), and the filter inductor coil box (13) being located inside the housing (1).

2. An impedance-adjustable filter according to claim 1, Features: A threaded mechanism is provided between the housing (1) and the side through hole (3), and the circuit board (5) is connected via the threaded mechanism, while the circuit board (5) is fixed.

3. An impedance-adjustable filter according to claim 2, Features: The thread mechanism comprises: a support column (4), the support column (4) being fixedly mounted on the inner surface of one end of the housing (1) away from the bottom plate (14), and the outer surface of one end of the support column (4) being in contact with the outer surface of the circuit board (5); a fixed snap-fit ​​block (7) being slidably mounted inside the side through hole (3), and one end of the fixed snap-fit ​​block (7) being in contact with the side surface of the circuit board (5); an elastic contact pin (8) being fixedly mounted on one end of the fixed snap-fit ​​block (7) close to the circuit board (5), and the outer surface of the elastic contact pin (8) being in contact with the metal contact (6). The fixed engaging block (7) is fixedly mounted with a wiring pin (9) at one end away from the quick-plug base (12), and the wiring pin (9) is connected to the elastic contact pin (8); a screw button (10) is threadedly mounted on the outer surface of the side through hole (3), and one end of the screw button (10) is in contact with the side surface of the fixed engaging block (7); the wiring pin (9) and the side through hole (3) are concentrically designed, and a quick-connect cable (11) is inserted into the outer surface of the wiring pin (9), and one end of the quick-connect cable (11) is located on the inner side of the screw button (10).

4. The impedance-adjustable filter according to claim 1, Features: A snap-fit ​​mechanism is provided at one end of the bottom plate (14) located inside the housing (1), and the filter inductor box (13) is stably fixed to the bottom plate (14) via the snap-fit ​​mechanism, so that the filter inductor box (13) can be accurately inserted into the quick-insert base (12).

5. An impedance-adjustable filter according to claim 4, Features: The engaging mechanism comprises: a side fixing plate (15), the side fixing plate (15) being fixedly mounted on one end of the bottom plate (14) located inside the housing (1), the side fixing plate (15) being slightly deformable, and a wedge-shaped block-shaped protrusion being provided at one end of the side fixing plate (15) away from the bottom plate (14), the side fixing plate (15) being engaged with the filter inductor coil box (13), the outer surface of the filter inductor coil box (13) being in contact with the outer surface of the side fixing plate (15), and the side fixing plate (15) and the filter inductor coil box (13) being of concentric design.

6. The impedance-adjustable filter according to claim 1, Features: A disassembly groove (16) is provided on the side surface of the bottom plate (14), and a spherical protrusion (17) is fixedly installed on the outer surface of the bottom plate (14) near the disassembly groove (16). An engaging groove (18) is provided on the inner surface of one end of the housing (1) near the fixing ear (2), and the engaging groove (18) is engaged with the spherical protrusion (17). Disassembly protrusion grooves (19) are provided on the inner surfaces of both sides of the housing (1) near the fixing ear (2), and the disassembly protrusion grooves (19) are higher than the height of the disassembly groove (16).

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