TWI449057B - Filter - Google Patents

Description

filter

The present invention relates to a filter.

Filters are widely used in various electronic devices to filter out noise during signal transmission, so that electronic devices have better performance. For example, filters can be installed on cables to transmit signals to cables. Filtering is performed so that the cable transmits only signals of a specific frequency band, so that the electronic equipment connected to the cable works more stably. For example, when the probe is used to measure the electronic device, the filter can be used to filter the signal transmitted by the probe, so that the tester can perform measurement analysis on the signal of the specific frequency band. Filters with different parameters can suppress signals in different frequency bands. Therefore, it is often necessary to separately design filters with different parameters for different requirements. However, when the filter design is completed, its parameters are not adjustable. Therefore, the conventional filter is not versatile.

In view of the foregoing, it is necessary to provide a parameter-adjustable filter that is versatile.

A filter comprising M inductive components, N capacitive components, an insulating tube, N conductive sheets, and a first contact end cap and a second contact end cap having electrical conductivity, each capacitive component comprising An inner metal tube, wherein the N capacitive components share an outer metal tube, the outer metal tube is grounded, and the inner metal tubes of the N capacitive components are mounted side by side in the outer metal tube without contact with each other and The outer metal tube is insulated, and the inner metal tube of the N capacitive components is sleeved outside the insulating tube, and the insulating tube is sleeved outside the M inductive components, and the insulating tube is provided with N pairs of slots, and each Two slots of a pair of slots are oppositely located on a circumference of the insulating tube, and both ends of each conductive sheet pass through corresponding two opposite slots to make electrical contact with a corresponding inner metal tube, each conductive The sheet is further connected to one end of two adjacent inductive components, and the two contact end caps are respectively detachably mounted at two ends of the insulating tube, and the two contact end caps are respectively not in contact with the conductive sheets of the M inductive components Electrical contact at both ends, where M and N are positive integers and M=N+1.

The filter realizes the function of the filter by arranging the inductive component, the capacitive component and the insulating tube together and transmitting the electrical connection between the inductive component and the capacitive component through the conductive piece. And the first and second contact end caps can be detached from the insulating tube when needed, and the filter is reorganized to make the filter meet different parameter requirements, which is convenient for the user.

The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

Referring to FIG. 1 to FIG. 4 together, a preferred embodiment of the filter 1 of the present invention includes three inductive components 10, 20, 30, a first capacitive component, a second capacitive component, and an insulating tube 60. Two conductive sheets 70, 80 and two contact end covers 90.

The first capacitive component includes an inner metal tube 40. The second capacitive component includes an inner metal tube 50. The first and second capacitive components share an outer metal tube 45. The outer metal tube 45 is used for grounding. The inner metal tubes 40 and 50 are disposed side by side of the insulating tube 60 and located in the outer metal tube 45. The inductive components 10, 20, 30 are placed side by side in the insulating tube 60. The conductive sheet 70 is placed between the inductive components 10, 20, and the conductive sheet 80 is placed between the inductive components 20, 30.

The inductive component 10 includes a magnetic cylinder 12 and a conductive coil 14. The outer surface of the magnetic cylinder 12 has an insulating medium 122. The conductive coil 14 is spiral and surrounds the magnetic cylinder 12. The conductive coil 14 is separated from the magnetic cylinder 12 by an insulating medium 122. The conductive coil 14 is elastic. In the embodiment, the magnetic cylinder 12 is made of a magnetic material such as iron, cobalt, nickel, or the like. 12 may be hollow or solid, and the insulating medium may be a glass fiber epoxidized resin (FR4).

The inductive component 20 includes a magnetic cylinder 22 and a conductive coil 24. The inductive component 30 includes a magnetic cylinder 32 and a conductive coil 34. The outer surfaces of the magnetic cylinders 22 and 32 have an insulating medium. The inductive components 20, 30 are identical in structure and material to the inductive component 10. The inductive components 10, 20, and 30 have inductive characteristics.

The length of the inner metal tubes 40, 50 is greater than the length of any of the inductive components 10, 20 or 30 and less than the sum of the lengths of any two of the inductive components 10, 20, 30. The inner metal tubes 40 and 50 are not in contact with each other. The outer metal tube 45 has an insulating medium 452 on its inner surface. The outer metal tube 45 is sleeved outside the inner metal tube 40, 50, and the outer metal tube 45 and the inner metal tube 40, 50 are separated by the insulating medium 452. The first and second capacitive components have a characteristic of capacitance.

The insulating tube 60 includes a hollow cylindrical body 62 and two annular stoppers 64 extending along the two bottom surfaces of the body 62, respectively. A receiving groove 66 is defined between each annular cover 64 and a corresponding bottom surface of the body 62. Two symmetric grooves 640 are defined in each annular cover 64. The tube wall of the body 62 is provided with two opposite slits 622 extending through the tube wall. The tube wall of the body 62 is provided with two slits 624 extending through the tube wall along the other circumference. In this embodiment, the insulating tube 60 is used to prevent the inductive component 12 and the capacitive component 14 from interfering with each other.

The two contact end caps 90 are electrically conductive. Each of the contact end covers 90 includes a cover body 92 having two opposite and co-circular arc edges 922 along which the two extension portions 94 extend outwardly adjacent to the bottom of the cover body. Each of the extending portions 94 has two arcs of a common circle. A central portion of the cover body 92 defines a circular opening. The cover body 92 extends upwardly from a circular opening to form a boss 96. The width of each extension 94 is less than or equal to the width of the groove 640 of the annular cover 64.

The inductive component 10 is disposed within the inner metal tube 40. The inductive component 30 is disposed within the inner metal tube 50. One end of the inductive component 20 is disposed within the inner metal tube 40 and the other end is disposed therein. Inside the metal tube 50. The insulating tube 60 is sleeved outside the inductive component 10, 20, 30. The conductive sheet 70 is disposed between the inductive components 10, 20 to be in contact with a first end of the conductive coil 14 and a first end of the conductive coil 24, and both ends of the conductive sheet 70 pass through two The slot 622 is in contact with the inner wall of the inner metal tube 40. The conductive sheet 80 is disposed between the inductive components 20, 30 to be in contact with a second end of the conductive coil 24 and a first end of the conductive coil 34, and both ends of the conductive strip 80 pass through the Two slots 624 are in contact with the inner wall of the inner metal tube 50.

The two contact end covers 90 are disposed at the two ends of the insulating tube 60. The two extending portions of each of the contact end covers 90 extend from the two recesses 640 of the annular cover 64 into the receiving groove 66 and can be in the receiving slot. The inner 66 is rotated to be clamped between the annular cover 64 and the body 62 such that the two contact end covers 90 are fixed at both ends of the insulating tube 60. When the two extending portions 94 are disposed in the receiving groove 66, the two arc sides 922 of the cover body 92 are in contact with the inner edge of the annular cover 64. When the two contact end covers 90 are mounted on both ends of the insulating tube 60, the second ends of the conductive coils 14 and 34 are respectively in contact with the corresponding contact end covers 90. The bosses 96 of the two contact end covers 90 serve as an input end and an output end of the filter 1, respectively, for connecting external devices.

Referring to FIG. 5 together, the equivalent circuit of the filter 1 is three inductors L1-L3 and two capacitors C1 and C2 connected to each other, wherein the inductive component 10 is equivalent to the inductor L1, and the inductive component 20 Equivalent to the inductance L2, the inductive component 30 is equivalent to the inductor L3, and the first capacitive component composed of the inner metal tube 40 and the outer metal tube 45 is equivalent to the capacitor C1, and is composed of the inner metal tube 50 and the outer metal tube 45. The second capacitive component is equivalent to capacitor C2, and the conductive sheets 70 and 80 are equivalent to nodes A and B in FIG. 5, respectively.

The inductors L1, L2, and L3 are connected in series, and the first ends of the capacitors C1 and C2 are respectively connected between the inductors L1 and L2 and between the inductors L2 and L3. The second ends of the capacitors C1 and C2 are grounded. One end of the inductors L1 and L3 serves as a signal input terminal and a signal output terminal, respectively. Therefore, the filter 1 has the characteristics of a low-pass filter.

Changing the structure of each component in the filter 1 can change its parameters, so that the filter 1 has different filtering effects, for example, changing the material of each component, the diameter of each magnetic cylinder, and each The density of the conductive coil, the thickness of each layer of insulating medium, the thickness of the insulating tube 60, etc., can change the parameters of the filter 1. When it is necessary to replace or adjust any of the components, each contact end cover 90 can be rotated to The extension portion 94 is respectively rotated to the position of the two grooves 640 of the corresponding annular cover 64. At this time, the filter 1 can be disassembled, and the components in the filter 1 can be reorganized as needed to achieve different Parameter requirements. The number of the inductive components 10, 20, 30 and the first capacitive component and the second capacitive component can be adjusted as needed. The capacitive component is one more than the inductive component such that one end of at least two inductive components is not coupled to the capacitive component and is coupled to the corresponding contact end cap 90.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

1‧‧‧ filter
10‧‧‧Inductive components
12, 22, 32‧ ‧ magnetic cylinder
14, 24, 34‧‧‧ Conductive coils
40, 50‧ ‧ inner metal tube
45‧‧‧Outer metal tube
122, 452‧‧‧Insulation medium
60‧‧‧Insulation tube
62‧‧‧Ontology
622, 624‧‧ ‧ slot
64‧‧‧Ring cover
640‧‧‧ Groove
66‧‧‧storage trough
70, 80‧‧‧ conductive sheets
90‧‧‧Contact end caps
92‧‧‧ cover
922‧‧‧Arc edge
94‧‧‧Extension
96‧‧‧Boss
L1-L3‧‧‧Inductance
C1, C2‧‧‧ capacitor
A, B‧‧‧ nodes

1 is a perspective view of a preferred embodiment of a filter of the present invention.

2 is an exploded view of the filter of FIG. 1.

Figure 3 is a cross-sectional view of the insulating tube of Figure 2.

4 is a cross-sectional view of the filter of FIG. 1.

FIG. 5 is an equivalent circuit diagram of the filter of FIG. 1.

12, 22, 32‧ ‧ magnetic cylinder

14, 24, 34‧‧‧ Conductive coils

40, 50‧ ‧ inner metal tube

45‧‧‧Outer metal tube

452‧‧‧Insulation medium

60‧‧‧Insulation tube

70, 80‧‧‧ conductive sheets

92‧‧‧ cover

94‧‧‧Extension

96‧‧‧Boss

Claims (9)

A filter comprising M inductive components, N capacitive components, an insulating tube, N conductive sheets, and a first contact end cap and a second contact end cap having electrical conductivity, each capacitive component comprising An inner metal tube, wherein the N capacitive components share an outer metal tube, the outer metal tube is grounded, and the inner metal tubes of the N capacitive components are mounted side by side in the outer metal tube without contact with each other and The outer metal tube is insulated, and the inner metal tube of the N capacitive components is sleeved outside the insulating tube, and the insulating tube is sleeved outside the M inductive components, and the insulating tube is provided with N pairs of slots, and each Two slots of a pair of slots are oppositely located on a circumference of the insulating tube, and both ends of each conductive sheet pass through corresponding two opposite slots to make electrical contact with a corresponding inner metal tube, each conductive The sheet is further connected to one end of two adjacent inductive components, and the two contact end caps are respectively detachably mounted at two ends of the insulating tube, and the two contact end caps are respectively not in contact with the conductive sheets of the M inductive components Electrical contact at both ends, where M and N are positive integers and M=N+1. The filter of claim 1, wherein the insulating tube comprises a hollow cylindrical body and two annular stoppers respectively extending along the two bottom surfaces of the body, and each annular cover corresponds to the body A receiving groove is defined between the bottom surfaces, and two grooves are symmetrically opened on each annular cover. The filter of claim 2, wherein the first and second contact end covers respectively comprise a cover body, and two sides of each cover body extend outwardly adjacent to the bottom of the cover body respectively. The extending portion is respectively received in the corresponding receiving groove from the two grooves of the corresponding annular cover, and is rotatable in the receiving groove to be respectively clamped on the corresponding annular cover and the body Therefore, the first and second contact end covers are respectively disposed at two ends of the insulating tube. The filter of claim 2, wherein each pair of slots is formed on the wall of the body of the insulating tube along a corresponding circumference and extends through the wall of the insulating tube body. The filter of claim 1, wherein each of the inductive components comprises a magnetic cylinder and a conductive coil, the conductive coil is spiral and surrounds the magnetic cylinder, and the magnetic cylinder and the conductive coil An insulating medium is disposed between the two ends of the conductive coil as opposite ends of the corresponding inductive component. The filter of claim 5, wherein the insulating tube, the insulating medium between the outer metal tube and the inner metal tube, and the insulating medium between the magnetic cylinder and the conductive coil are both glass fiber epoxidized. Resin material composition. The filter of claim 6, wherein the magnetic cylinder is made of iron, cobalt or nickel. The filter of claim 1, wherein the first and second contact end covers respectively comprise a cover, and a central opening defines a circular opening, and each cover has a circular opening along the circular opening thereof. A boss is extended upward, and the bosses of the first and second contact end caps respectively serve as an input end and an output end of the filter. The filter of claim 1, wherein the length of each inner metal tube is greater than the length of any of the inductive components and less than the sum of the lengths of any two inductive components.