JP2740391B2 - Insulated shaft type variable air condenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated shaft type variable air capacitor, and more particularly to an insulated shaft type variable air capacitor in which the assembling time is reduced, the assembling accuracy is improved, and the mechanical strength of the insulated shaft is improved.

[0002]

2. Description of the Related Art A conventional insulated shaft type variable air capacitor will be described with reference to the structural diagram of FIG. FIG.
2A is a top view of the capacitor, FIG. 2B is a side cross-sectional view of the shaft of the capacitor, and FIG. 2C is a front cross-sectional view of the shaft of the capacitor.

In the insulated shaft type variable air capacitor shown in FIG. 2, a stator 5 has at least one conductor plate, and a position is fixed to a metal case 6. The rotor valve 1 is composed of at least one conductor plate, and can form an electric capacitance between the rotor valve 1 and the stator 5 so as to face the stator 5. A rotor shaft 7 of a conductor that forms a rotor together with the rotor valve 1 fixes the rotor valve 1. The insulating shaft 2A made of an insulator penetrates and supports the rotor shaft 7, and the metal shaft 4 having both ends of the shaft 2A fixed to the metal case 6 is driven to rotate.

[0004] The condenser shown in FIG.
This is a double-type capacitor including two components such as the stator 5, and each unit capacitor can be incorporated in an independent circuit.

[0005]

In the conventional insulated shaft type variable air condenser, since the rotor is mounted by penetrating the insulating shaft through the rotor shaft, the mounting and assembling time is long and the assembling accuracy is not sufficient. There was a disadvantage.

Further, the diameter of the insulating shaft is reduced,
There was a problem that it was difficult to satisfy the required mechanical strength.

[0007]

The insulated shaft type variable air capacitor of the present invention comprises a fixed stator having at least one conductive plate, and at least one conductive plate, which is electrically opposed to the stator. Insulated shaft type variable air having a rotor valve capable of forming a capacity, a rotor shaft of a conductor that fixes the rotor valve, and an insulating shaft that is formed of an insulator and fixes the rotor shaft and is rotationally driven by a metal shaft. In the capacitor, the rotor shaft and the insulating shaft are integrally formed.

[0008] For example, the rotor shaft and the insulating shaft which are integrally formed are made of ceramics with metal deposited on a circular side surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a structural diagram of an embodiment of an insulated shaft type variable air capacitor according to the present invention. Here, FIG. 1A is a top view of the capacitor, FIG. 1B is a side sectional view of the shaft of the capacitor, and FIG. 1C is a front sectional view of the shaft of the capacitor.

[0010] The double shaft type insulated shaft type variable air capacitor shown in FIG. 1 is similar to the prior art insulated shaft type variable air capacitor described with reference to FIG. A metal case 6 is provided. On the other hand, instead of the insulating shaft 2A and the rotor shaft 7, the rotor includes an insulating shaft 2 and a metal coating 3 formed on a circular side surface of the shaft 2 by a metal deposition technique or the like. The rotor valve 1 is fixed to the metal coating 3 by soldering. A groove is cut in the insulating shaft 2 at a position where the rotor valve 1 is fixed, and the metal coating 3 is thickened here. Further, as a material of the insulating shaft 2, ceramics capable of metal deposition are typical.

By integrating the rotor as described above, the assembling time of the insulated shaft type variable air condenser can be shortened and the assembling accuracy can be improved.

The diameter of the insulating shaft 2 can be made substantially equal to the diameter of the rotor shaft 7 according to the prior art, so that the mechanical strength against vibration and impact can be improved.

As shown in FIG. 1, if a plurality of or more rotors and stators 5 are provided in one insulated shaft type variable air capacitor as shown in FIG. Therefore, the common impedance is eliminated. For example, when a tuning circuit is formed using this capacitor, extra complex coupling is reduced, and mutual interference between the tuning circuits and simplification of the circuit can be achieved. There is also an effect.

[0014]

As described above, the insulated shaft type variable air condenser of the present invention has an integral structure of the rotor shaft and the insulated shaft, so that the assembling time of the condenser can be shortened, the assembling accuracy can be improved, and mechanical characteristics can be improved. This has the effect that strength can be improved.

[Brief description of the drawings]

FIG. 1 is a structural view of an embodiment of an insulated shaft type variable air capacitor according to the present invention. FIG. 1A is a top view of the capacitor, FIG. 1B is a side sectional view of the shaft of the capacitor, and FIG. 1C is a front sectional view of the shaft of the capacitor.

FIG. 2 is a structural view of a conventional insulated shaft type variable air capacitor. 2A is a top view of the capacitor, FIG. 2B is a side sectional view of the shaft of the capacitor, and FIG. 2C is a front sectional view of the shaft of the capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor valve 2, 2A Insulated shaft 3 Metal coating 4 Metal shaft 5 Stator 6 Metal case 7 Rotor shaft

Claims (2)

(57) [Claims] 1. A fixed stator having at least one conductor plate, a rotor valve composed of at least one conductor plate and capable of forming an electric capacity facing the stator, and fixing the rotor valve. In an insulating shaft type variable air capacitor having a conductor rotor shaft and an insulating shaft which is formed of an insulator and fixes the rotor shaft and is rotationally driven by a metal shaft, the rotor shaft and the insulating shaft are integrally formed. An insulated shaft variable air condenser characterized by the following. 2. The insulated shaft type variable air condenser according to claim 1, wherein the integrally formed rotor shaft and the insulating shaft are ceramics with metal deposited on a circular side surface.