CN2279688Y

CN2279688Y - Capacitor with variable capacitance

Info

Publication number: CN2279688Y
Application number: CN 96233500
Authority: CN
Inventors: 吴素英
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-31
Filing date: 1996-07-31
Publication date: 1998-04-22
Anticipated expiration: 2006-07-31

Abstract

The utility model relates to a capacitor with variable capacitance, which is composed of electrode plates, lead wires (feet), a dielectric medium, a casing, etc. The utility model is characterized in that the inner part of the capacitor is provided with a plurality of electrode plates which are not communicated with each other and are wound together and a plurality of lead wires (feet) which are not communicated with each other and the number of the lead wires (feet) is not smaller than the number of the electrode plates. When the utility model is used, a plurality of values of capacitance can be obtained by changing the connecting mode of the lead wires (feet). The utility model has the advantages of large variable ranges of capacitance, small volume, light weight, good electrical performance, etc. The utility model can be used for electronic circuits, the capacitance of which needs changing and electronic products, and is particularly suitable for power line carrier communication equipment.

Description

The capacitor that a kind of capacitance is variable

The utility model relates to capacitor, the variable capacitor of particularly a kind of capacitance.

The capacitor that uses in the current electronic product is broadly divided into variable capacitor and fixed capacitor two big classes.Various air dielectric variable capacitors are arranged in the variable capacitor, various plastic film medium variable capacitors, and various ceramic dielectric variable capacitors etc.The doubly-linked variable capacitor that for example uses in the radio-cassette player, the trimmer capacitor that uses in instrument, the instrument etc.Their common feature is in use by the turn moving plate capacitance to be changed.The variation of variable capacitance capacitor amount is continuous, but variable range is smaller, generally be to several picofarads or tens picofarads or hundreds of picofarad from zero, if will produce the bigger variable capacitor of capacitance variable range, its volume and weight is all very big, obviously is not suitable for being applied in the electronic product.Fixed capacitor has various mica dielectric capacitors, various ceramic dielectric capacitors, and various paper condensers, and various plastic film dielectric capacitors etc.The for example mica condenser that uses in communication equipment and the television set, ceramic capacitor, paper capacitor, polystyrene capacitor, polypropylene capacitor, mylar capacitor etc.Their common feature is that every capacitor all has fixing capacitance, and in use capacitance can not change.The capacitance swing of fixed capacitor is very wide, and the fixed capacitor from several picofarads to tens microfarads can create, and volume and weight is all smaller.Because the variable range of variable capacitance capacitor amount is smaller, and fixed capacitor in use capacitance can not change, therefore defining them, all to be not suitable for being applied in the capacitance variable range that requires capacitor bigger, and the smaller occasion of volume and weight, for example high freguency bandpass filter in the power line carrier communication equipment and speech low pass filter.

The purpose of this utility model is in order to overcome the shortcoming of above-mentioned capacitor, provides that a kind of capacitance variable range is big, volume is little, the variable capacitor of capacitance in light weight, good electric property.

Solution of the present utility model is:

1. capacitor that capacitance is variable, by formations such as battery lead plate, lead-out wire (pin), dielectric, shells, the quantity that it is characterized in that battery lead plate is more than two.

Further solution is that each battery lead plate is not connected each other.

Further solution is that all battery lead plates are wound on together again.

2. capacitor that capacitance is variable, by formations such as battery lead plate, lead-out wire (pin), dielectric, shells, the quantity that it is characterized in that lead-out wire (pin) is more than two.

Further solution is that each root lead-out wire (pin) is not connected each other.

Further solution is that the quantity of lead-out wire (pin) is no less than the quantity of battery lead plate again.

In sum, solution of the present utility model is: the capacitor that a kind of capacitance is variable, by formations such as battery lead plate, lead-out wire (pin), dielectric, shells, it is characterized in that being provided with in capacitor inside polylith not connected each other, be wound on together battery lead plate and the corresponding with it many lead-out wires (pin) not connected, that quantity is no less than battery lead plate quantity.

It is to be noted especially, is the dielectric that mica sheet etc. is not suitable for reeling if capacitor uses, and that is petty according to design concept of the present utility model, then is the polylith battery lead plate is overlaped.

Evidence, the utility model in use by changing the connected mode of lead-out wire (pin), can obtain several needed capacitance values, and its capacitance swing can be from several picofarads to several ten thousand picofarads, even to the hundreds of thousands picofarad, the variable range of visible capacitance is very big really.Simultaneously, the utility model also has advantages such as volume is little, in light weight, good electric property.Therefore, the utility model can be widely used in the electronic circuit and electronic product that capacitance need change, and is specially adapted to power line carrier communication equipment.

Below in conjunction with embodiment the utility model is further described.

Fig. 1 is embodiment 1 described the utility model profile schematic diagram

Fig. 2 is that embodiment 1 described the utility model internal structure is launched schematic diagram

Fig. 3 is embodiment 2 described the utility model profile schematic diagrames

Fig. 4 is that embodiment 2 described the utility model internal structures are launched schematic diagram

Embodiment 1 makes the variable capacitor of a kind of capacitance described in the utility model by certain capacitor manufacturer, used raw material have the thick aluminium foil of 10 μ m, the thick polystyrene film of 100 μ m, and the tinned wird of Φ 0.3mm and Φ 1mm etc., the utility model profile schematic diagram that produces as shown in Figure 1, internal structure is launched schematic diagram as shown in Figure 2.

Among Fig. 2, the 1,2,3,4,5,6,7, the 8th, battery lead plate and corresponding with it lead-out wire (pin).Battery lead plate is the thick aluminium foils of 10 μ m, and lead-out wire (pin) is the tinned wird of Φ 0.3mm, and lead-out wire (pin) adopts spot welding to be connected with battery lead plate.13,14 is dielectric, use be the thick polystyrene films of 100 μ m.

Polystyrene film shown in Figure 2 and battery lead plate are wound up, handle through polymerization, shaping and embedding then, then obtain the variable capacitor of described in the utility model a kind of capacitance shown in Figure 1.

Among Fig. 1, the 1,2,3,4,5,6,7, the 8th, lead-out wire (pin), consistent with the label among Fig. 2.9, the 10,11, the 12nd, the lead-out wire (pin) that capacitor is total wherein 9 communicates with 11, and 10 communicate with 12, and used material is the tinned wird of Φ 1mm.11,12 is the double mechanical fixation pin of electric lead-out wire (pin) of capacitor, uses for assembling.

The variable capacitor of the described a kind of capacitance of present embodiment is provided with 8 not connected each other electrode plate and corresponding with it 8 lead-out wires (pin) in inside as can see from Figure 2.By changing the mode of connection of lead-out wire (pin), can obtain several needed capacitance values in the use.

For example (1) links to each other 1 pin with 9 pin, and 8 pin link to each other with 10 pin, and recording capacitance at 11 pin and 12 pin is 136.1pF.

(2) 4 pin are linked to each other with 9 pin, 8 pin link to each other with 10 pin, and recording capacitance at 11 pin and 12 pin is 1377pF.

(3) 7 pin are linked to each other with 9 pin, 8 pin link to each other with 10 pin, and recording capacitance at 11 pin and 12 pin is 13682pF.

(4) 6,7,9 pin are linked to each other, 8 pin link to each other with 10 pin, and recording capacitance at 11 pin and 12 pin is 19415pF.

(5) 3 pin are linked to each other with 9 pin, 4 pin link to each other with 10 pin, and recording capacitance at 11 pin and 12 pin is 463.4pF.

(6) 3,5,9 pin are linked to each other, 4,8,10 pin link to each other, and recording capacitance at 11 pin and 12 pin is 3249.3pF, or the like.

What deserves to be mentioned is that the electric leading foot of the capacitor mechanical fixation pin 11,12 of holding concurrently can be drawn from the side of capacitor, also can draw from the bottom surface of capacitor.The electric leading foot 1～10 of capacitor can be drawn above capacitor, also can draw from the side of capacitor.

Present embodiment for be the example of the variable capacitor of a battery lead plate a kind of capacitance of the utility model of becoming two-layer arrangement, below embodiment 2 will be for the example of the variable capacitor of a kind of capacitance of the utility model that a battery lead plate becomes three layers of arrangement.

Embodiment 2 makes the variable capacitor of a kind of capacitance described in the utility model by certain capacitor manufacturer, used raw material have the thick aluminium foil of 10 μ m, the thick polypropylene film of 50 μ m, and the tinned wird of Φ 0.3mm and Φ 1mm etc., the utility model profile schematic diagram that produces as shown in Figure 3, internal structure is launched schematic diagram as shown in Figure 4.

Among Fig. 4, the 1,2,3,4,5, the 6th, battery lead plate and corresponding with it lead-out wire (pin).Battery lead plate is the thick aluminium foils of 10 μ m, and lead-out wire (pin) is the tinned wird of Φ 0.3mm, and lead-out wire (pin) adopts spot welding to be connected with battery lead plate.11,12,13 is dielectric, use be the thick polypropylene films of 50 μ m.

Polypropylene film shown in Figure 4 and battery lead plate are wound up, handle through fastening, shaping and embedding then, then obtain the variable capacitor of described in the utility model a kind of capacitance shown in Figure 3.

Among Fig. 3 the 1,2,3,4,5, the 6th, lead-out wire (pin), consistent with the label among Fig. 4.7, the 8,9, the 10th, the lead-out wire (pin) that capacitor is total wherein 7 communicates with 9, and 8 communicate with 10, and used material is the tinned wird of Φ 1mm.9,10 is the double mechanical fixation pin of electric lead-out wire (pin) of capacitor, uses for assembling.

The variable capacitor of the described a kind of capacitance of present embodiment is provided with 6 not connected each other electrode plate and corresponding with it 6 lead-out wires (pin) in inside as can see from Figure 4.By changing the connected mode of lead-out wire (pin), can obtain several needed capacitance values in the use, operating position identical with described in the embodiment 1 just repeats no more here.

Claims

1. the capacitor that capacitance is variable is made of battery lead plate, lead-out wire, dielectric, shell etc., and the quantity that it is characterized in that battery lead plate is more than two, and every electrode plate has a lead-out wire at least.

2. the variable capacitor of a kind of capacitance according to claim 1 is characterized in that each battery lead plate is not connected each other.

3. the variable capacitor of a kind of capacitance according to claim 1 is characterized in that all battery lead plates are wound on together.

4. the variable capacitor of a kind of capacitance according to claim 1 is characterized in that the quantity of lead-out wire is no less than the quantity of battery lead plate.