CN219697617U - Variable capacitor and adjustable filter - Google Patents
Variable capacitor and adjustable filter Download PDFInfo
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- CN219697617U CN219697617U CN202321155556.9U CN202321155556U CN219697617U CN 219697617 U CN219697617 U CN 219697617U CN 202321155556 U CN202321155556 U CN 202321155556U CN 219697617 U CN219697617 U CN 219697617U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 30
- 239000007769 metal material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
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Abstract
The utility model provides a variable capacitor and an adjustable filter, and aims to solve the technical problem that frequency modulation is required to be realized only by a circuit structure except an LC filter in the current LC filter circuit. The variable capacitance includes a first electrode plate; the second electrode plates are arranged in parallel with the first electrode plates, gaps exist between all the second electrode plates and the first electrode plates, and gaps exist between two adjacent second electrode plates; the number of the arc-shaped plates is equal to that of the second electrode plates, all the arc-shaped plates are respectively and electrically connected with one second electrode plate, all the arc-shaped plates jointly form a hollow cylindrical structure, and a space exists between two adjacent arc-shaped plates; the rotor is arranged in the cylindrical middle part formed by the arc plates; the contact rod is transversely arranged on the rotor, the end part of the contact rod can be contacted with the arc-shaped plate, and the end part of the contact rod is provided with a metal sheet connected with the electrode. The tunable filter includes a number of variable capacitors.
Description
Technical Field
The utility model relates to a capacitor and a filter, in particular to a variable capacitor and an adjustable filter.
Background
The LC filter is a filter circuit formed by utilizing the combined design of an inductor, a capacitor and a resistor, can filter out one or more harmonics, and is most commonly and easily adopted as a passive filter structure, wherein the inductor and the capacitor are connected in series.
The capacitor in the LC filter has the function of passing high frequency and low frequency, the wave bands of different frequencies of the capacitor have different filtering effects, and the parameters of the capacitor have direct influence on filtering.
The current specification of the same capacitor in the market is certain, namely, a single capacitor, the capacitance of which is fixed, so that in the LC filter, the band filtered by the single capacitor is fixed. Therefore, in LC filter circuits requiring frequency modulation, it can be realized only by other means.
Disclosure of Invention
Aiming at the technical problem that the current LC filter circuit needs to be frequency-modulated only by a circuit structure except the LC filter, the utility model provides a variable capacitor and an adjustable filter, which has the advantage of being capable of realizing frequency modulation in the filter.
The technical scheme of the utility model is as follows:
a variable capacitor, comprising:
a first electrode plate communicated with an electrode;
the second electrode plates are arranged in parallel with the first electrode plates, gaps exist between all the second electrode plates and the first electrode plates, the gaps between the second electrode plates and the first electrode plates are unequal, and gaps exist between two adjacent second electrode plates;
the number of the arc-shaped plates is equal to that of the second electrode plates, all the arc-shaped plates are respectively and electrically connected with one second electrode plate, all the arc-shaped plates jointly form a hollow cylindrical structure, and a space exists between two adjacent arc-shaped plates;
the rotor is arranged in the middle of the cylinder formed by the arc-shaped plates and is in power connection with an output shaft of a miniature motor;
and the feeler lever is transversely arranged on the rotor, the end part of the feeler lever can be contacted with the arc-shaped plate, and the end part of the feeler lever is provided with a metal sheet connected with the electrode.
Optionally, the intervals between all the second electrode plates and the first electrode plates sequentially increase from one end to the other end of the first electrode plates.
Optionally, all the second electrode plates from one end to the other end of the first electrode plate are electrically connected to all the arc plates in a clockwise or counterclockwise direction.
Optionally, the metal sheet at the end of the contact rod is in a U-shaped structure, and the metal sheet can move along the length direction of the contact rod.
Optionally, a spring is sleeved on the feeler lever, two ends of the spring are respectively contacted with the metal sheet and the rotor, and an insulating layer is arranged between the spring and the metal sheet.
Optionally, two ends of the metal sheet are fixedly connected with two ends of a connecting plate respectively, a through hole is formed in the middle of the connecting plate, the feeler lever penetrates through the through hole, and a limiting sheet is arranged at the end part of the feeler lever.
Optionally, the connecting plate is made of non-metal material, the end part of the spring is fixedly connected with the connecting plate, and a gap exists between the spring and the metal sheet.
Optionally, the width of the end part of the metal sheet is smaller than the interval between two adjacent arc plates.
A variable capacitor and tunable filter includes a plurality of variable capacitors and a plurality of inductors.
Compared with the prior art, the utility model has the beneficial effects that:
in the technical scheme, a first electrode plate is arranged firstly, then a plurality of second electrode plates which are parallel to each other are arranged on one side of the first electrode plate, and the intervals between all the second electrode plates and the first electrode plates are unequal, so that capacitors with different capacitances are formed between all the second electrode plates and the first electrode plates. The variable capacitor is arranged in the LC filter, so that the purpose of internal frequency modulation of the LC filter is achieved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of the variable capacitor;
FIG. 2 is a schematic diagram of the structure of the variable capacitor;
fig. 3 is an enlarged schematic view at a in fig. 2.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
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 such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Example 1:
referring to fig. 1 to 3, a variable capacitor includes a first electrode plate 1, a second electrode plate 2, an arc plate 3, a rotor 4, a feeler lever 5, and a metal plate 6. Specifically, the first electrode plate 1 is electrically connected to one electrode of the power supply. The device is provided with a plurality of second electrode plates 2 which are arranged on one side of the first electrode plate 1 in parallel, wherein the distances between all the second electrode plates 2 and the first electrode plate 1 are different.
The arc plates 3 are made of metal materials, the number of the arc plates 3 is equal to that of the second electrode plates 2, and all the arc plates 3 are in one-to-one corresponding electric connection with all the second electrode plates 2. The arc plates 3 are long, the cross section of the arc plates is arc-shaped, all the arc plates 3 can form a hollow cylindrical structure, and meanwhile, a space exists between two adjacent arc plates 3.
The rotor 4 is arranged inside a hollow cylindrical structure surrounded by all the arcuate plates 3, and the axis of rotation of the rotor 4 is collinear with the axis of the hollow cylindrical structure. One end of the rotor 4 is in power connection with an output shaft of a micro motor 7, and the micro motor 7 is used for driving the rotor 4 to rotate.
The rotor 4 is provided with a feeler lever 5, one end of the feeler lever 5 is fixedly arranged on the cylindrical surface of the feeler lever 5, the feeler lever 5 and the rotor 4 are mutually perpendicular, the other end of the feeler lever 5 is provided with a metal sheet 6, and the metal sheet 6 is electrically connected with the other electrode of the power supply. Meanwhile, the metal sheet 6 may be in contact with the arc plate 3 during the rotation of the rotor 4 driven by the micro motor 7.
In this embodiment, the rotation of the micro motor 7 is controlled, so that the contact between the metal sheet 6 and the different arc plates 3 is controlled, and the different second electrode plates 2 are communicated with the other electrode of the power supply, so that the capacitor has a plurality of specifications of different capacitance.
In one specific embodiment, the intervals between all the second electrode plates 2 and the first electrode plates 1 are sequentially increased from one second electrode plate 2 near one end of the first electrode plate 1 to one second electrode plate 2 near the other end of the first electrode plate 1, and in this order, all the arc plates 3 electrically connected with all the second electrodes are arranged clockwise or counterclockwise.
In another specific embodiment, the metal sheet 6 at the end of the feeler lever 5 is in a U-shaped structure, two ends of the metal sheet 6 are respectively connected to two ends of a connecting plate 8, the connecting plate 8 is made of a nonmetallic material, a through hole is formed in the middle of the connecting plate 8, one end of the feeler lever 5 far away from the rotor 4 penetrates through the through hole, a limiting sheet is arranged at the end of the feeler lever 5, the limiting sheet is circular, and meanwhile, the diameter of the limiting sheet is larger than that of the through hole.
The metal sheet 6 is an arc-shaped section which is contacted with the arc-shaped plates 3, and the width of the end of the metal sheet 6 is smaller than the interval between the two arc-shaped plates 3.
The feeler lever 5 is also sleeved with a spring 9, one end of the spring 9 is propped against the rotor 4, and the other end of the spring 9 is fixedly arranged on the connecting sheet. Two ends of the spring 9 are respectively provided with an insulated plastic pipe, and the plastic pipes are contacted with the rotor 4 and the connecting plate 8. The diameter of the spring 9 is smaller than the distance between the two ends of the metal sheet 6, namely: there is a spacing between the ends of the springs 9 and the ends of the metal sheet 6. The spring 9 on the feeler lever 5 is in a compressed state.
In the embodiment, the spring 9 is arranged to drive the metal sheet 6 to slide on the feeler lever 5, so that the metal sheet 6 and the arc plate 3 are ensured not to be separated due to vibration in the contact process.
Example 2:
a tunable filter comprising a number of variable capacitors and a number of inductors, all of the variable capacitors being connected in series or in parallel with all of the inductors.
In the technical scheme, a first electrode plate 1 is firstly arranged, then a plurality of second electrode plates 2 which are parallel to each other are arranged on one side of the first electrode plate 1, and the intervals between all the second electrode plates 2 and the first electrode plate 1 are unequal, so that capacitors with different capacitance are formed between all the second electrode plates 2 and the first electrode plate 1. The variable capacitor is arranged in the LC filter, so that the purpose of internal frequency modulation of the LC filter is achieved.
The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (9)
1. A variable capacitor, comprising:
a first electrode plate communicated with an electrode;
the second electrode plates are arranged in parallel with the first electrode plates, gaps exist between all the second electrode plates and the first electrode plates, the gaps between the second electrode plates and the first electrode plates are unequal, and gaps exist between two adjacent second electrode plates;
the number of the arc-shaped plates is equal to that of the second electrode plates, all the arc-shaped plates are respectively and electrically connected with one second electrode plate, all the arc-shaped plates jointly form a hollow cylindrical structure, and a space exists between two adjacent arc-shaped plates;
the rotor is arranged in the middle of the cylinder formed by the arc-shaped plates and is in power connection with an output shaft of a miniature motor;
and the feeler lever is transversely arranged on the rotor, the end part of the feeler lever can be contacted with the arc-shaped plate, and the end part of the feeler lever is provided with a metal sheet connected with the electrode.
2. The variable capacitor of claim 1, wherein the spacing between all of the second electrode plates and the first electrode plates increases sequentially from one end of the first electrode plates to the other end.
3. The variable capacitor of claim 2, wherein all of the second electrode plates from one end of the first electrode plate to the other end are electrically connected to all of the arc plates in a clockwise or counterclockwise direction.
4. A variable capacitor according to claim 3, wherein the metal sheet at the end of the feeler lever is of U-shaped configuration, the metal sheet being movable along the length of the feeler lever.
5. The variable capacitor of claim 4, wherein the feeler lever is sleeved with a spring, two ends of the spring are respectively contacted with the metal sheet and the rotor, and an insulating layer is arranged between the spring and the metal sheet.
6. The variable capacitor of claim 5, wherein two ends of the metal sheet are fixedly connected with two ends of a connecting plate respectively, a through hole is formed in the middle of the connecting plate, the feeler lever passes through the through hole, and a limiting piece is arranged at the end part of the feeler lever.
7. The variable capacitor of claim 6, wherein the connecting plate is made of a non-metallic material, the ends of the spring are fixedly connected to the connecting plate, and a gap exists between the spring and the metal sheet.
8. The variable capacitor of claim 7, wherein the width of the sheet metal ends is less than the spacing between adjacent arcuate plates.
9. A tunable filter using a variable capacitor according to any one of claims 1-8, comprising a number of said variable capacitors and a number of inductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321155556.9U CN219697617U (en) | 2023-05-15 | 2023-05-15 | Variable capacitor and adjustable filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321155556.9U CN219697617U (en) | 2023-05-15 | 2023-05-15 | Variable capacitor and adjustable filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697617U true CN219697617U (en) | 2023-09-15 |
Family
ID=87938936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321155556.9U Active CN219697617U (en) | 2023-05-15 | 2023-05-15 | Variable capacitor and adjustable filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219697617U (en) |
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2023
- 2023-05-15 CN CN202321155556.9U patent/CN219697617U/en active Active
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