JPS5838600Y2 - variable ceramic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention is intended to provide a thin and small variable ceramic capacitor that can obtain two series of capacitances.

In general, variable ceramic capacitors are constructed so that one capacitance can be varied, and are generally called trimmer capacitors, and their structure consists of a semicircular stator electrode provided on a stator board, and A semicircular rotor electrode is provided through a ceramic dielectric, and this rotor electrode is electrically and mechanically coupled to the rotating shaft.The opposing area between the stator electrode and the rotor electrode is changed by rotation of the rotating shaft, and static electricity is generated. It is configured to adjust the capacitance.

In such a structure, it is difficult to obtain two variable capacitors, and there are also serious problems in terms of size and thickness.

Recently, variable ceramic capacitors have been used not only as single variable capacitors in communication equipment and audio equipment, but also in the electronic circuits of electronic watches. .

In this way, electronic watches, especially those incorporated into wristwatches, are required to be ultra-compact and have a large capacity (two units).

However, the configuration of conventional variable ceramic capacitors has not been able to meet these demands.

In addition, an insulator with rotor electrodes held on the upper and lower surfaces is coupled to a rotating shaft, and a dielectric body with stator electrodes is placed above and below the insulator on which the rotor electrodes are provided, and this is incorporated into the case. A dual-type variable ceramic capacitor has been developed, but this requires a case and is large, and has a complicated conduction structure that requires time and effort to manufacture, resulting in significant disadvantages in terms of cost. Ta.

The present invention aims to provide a small, thin, and simple dual-type large-capacity variable magnetic capacitor by using a configuration that breaks the common sense of conventional variable magnetic capacitors.

Hereinafter, the present invention will be explained with reference to FIGS. 1 to 4 of the drawings of one embodiment.

In the figure, 9 is an insulator disk, and this insulator disk 9
A through hole 25 is formed in the center.

On both the upper and lower sides of the insulating inner plate 9 of the lever, there are semicircular stator electrodes 16, 17 and rotor side lead-out terminals 15.
The stator electrodes 16.17 and the rotor side lead-out terminals 15.11 are formed to have the same thickness, and the respective terminal portions 8.12.10.13 are integrally formed.

In addition, the through hole 2 of the insulator disk 9 of the stator electrode 16.17
Semicircular notches 38 and 39 are formed in the portion corresponding to 5 so as not to be exposed in the through hole 25, and the rotor side lead-out terminal 15.11 and the stator electrode 16.17 are electrically connected. Insulated.

On the other hand, a protruding piece 36.37 is formed in a portion of the rotor-side lead-out terminal 15.11 corresponding to the through-hole 25.
The projecting piece 36.37 has a shaft hole 28.29.
is formed.

Then, stator electrodes 16 and 17 are attached to the above-mentioned insulator disk 9.
A rotor disk 5.19 is disposed on the upper and lower surfaces of the rotor side lead-out terminal 15.11.

The rotor dielectric disk 5.19 is made of a dielectric material made of porcelain such as ceramic, and has a semicircular rotor electrode 6.19.
20 is the stator electrode 16゜17 and the rotor side extraction terminal 1
It is formed on the side that does not touch 5.11, and there is a through hole 3 in the center.
3.32 is formed and configured.

The through holes 32.33 of the rotor dielectric disk 5.19 and the through holes 25 of the insulator disk 9, the rotor side lead-out terminal plate 1
The protruding piece 36.370 of 5.11 passes through the through hole 30° 31 of the shaft hole 2B, 29 and the elastic body 2.18 made of a cap-like elastic metal arranged outside the rotor dielectric disk 5.19. The rotor shaft 40 is inserted in this manner.

A head 1 with an adjustment driver groove 3 formed on the upper surface is formed on the upper part of the rotor shaft 40, and a threaded part 2 is formed on the lower end.
3 is formed and tightened by a screw hole 23' of a nut 22 to integrate the whole.

That is, the rotor dielectric disk 5.1 is connected between the head 1 of the rotor shaft 40 and the nut 22 via the elastic body 2.18.
9 to the stator electrode 16.17 and the rotor side lead-out terminal part 1
5.11, and are electrically and mechanically coupled via the elastic body 2.18 by the rotor dielectric disks 5, 19, the head 1 of the rotor shaft 40, or the nut 22.

Further, in the through hole 33 of the rotor dielectric disk 5, a plate spring 27.26 is arranged, which is a disk-shaped plate having a through hole 35° 34 and bent in the middle to form a V-shape. Leaf spring 2
Both ends of 7.26 are pressed against the elastic body 2 and the protruding piece 36 of the rotor-side drawer plate 15 to ensure electrical continuity between them.

The soldering points are shown at 4.7.14.21.24.

In the above configuration, when the rotor shaft 40 is rotated using the adjustment driver groove 3 of the head 1, the rotor dielectric, which is mechanically coupled to the rotor shaft 40 via the elastic body 2.18, is rotated. The body disc 5.19 rotates and the rotor electric 1'! 6
．． The opposing areas of the stator electrode 20 and the stator electrodes 16 and 17 change, and the capacitance between them changes.

However, since there are two independent stator electrodes 16 and 17, two different variable capacitances are obtained.

Furthermore, by shorting the stator electrodes 16 and 17, the variable capacitance can be doubled, and by changing the insulator disk 9 to a dielectric and changing the arrangement of the electrodes, it is possible to create a variable capacitor with a fixed capacitor. can.

Since the variable magnetic capacitor of the present invention is constructed as described above, it was difficult to create a structure that was compact, thin, and simple with the conventional double-type variable magnetic capacitor, but the stator By sharing the substrate, it can be made thin and small, and its structure is simple and inexpensive.
It can be a continuous variable ceramic capacitor.

Incidentally, by stacking and bonding several capacitors having the configurations shown in the above embodiments, a multiple variable ceramic capacitor can be obtained.

As described above, the variable magnetic capacitor of the present invention has various advantages and can be used as a variable magnetic capacitor for adjusting the frequency of a circuit using a crystal oscillator Xtal of an electronic wristwatch or the like.

For example, in Figure 4A, if only Cin was a variable magnetic capacitor, oscillation would stop or abnormal oscillation would occur during adjustment of Cin, making it difficult to adjust.However, as shown in Figure 4B, Cin and Cout By using interlocking variable magnetic capacitors, it is possible to eliminate the troubles mentioned above during adjustment by changing both at the same time. It can be a dog of industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the variable magnetic capacitor of the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is an exploded perspective view, and Fig. 4
Figures A and B are general circuit diagrams using a variable capacitor in a crystal oscillator. 1...Head, 2.18...Elastic body, 3
...Adjustment driver groove, 4.7.14.21
．． 24...Solder, 5.19...Rotor dielectric disk, 6.20...Rotor electrode, 8.1
0.12.13...Terminal part, 9...Insulator disc, 11.15...Rotor side lead-out terminal, 16.17...Stator Electrode, 22...
...Nut, 23...Threaded part, 23'...
...Screw hole, 25...Through hole, 26, 27...
...Plate spring, 28.29 ...Merical skin, 30.3
1...Through hole, 32.33...Through hole, 3
4.35...Through hole, 36.37...Protruding piece, 38.39...Semicircular notch, 40.
...Rotor shaft.

Claims (1)

[Scope of utility model registration request] A semicircular stator electrode with independent terminals on the outer periphery and a semicircular rotor-side lead-out terminal with a protruding piece in the center are fixed to the front and back sides of a disc made of an insulator or dielectric, respectively, and this circular Rotor dielectric disks with semicircular rotor electrodes formed on the outer surfaces are arranged on the upper and lower surfaces of the plate, and cap-shaped elastic bodies are placed on the outer surfaces of the rotor dielectric disks. A rotor shaft is passed through the center, and the rotor shaft and the elastic body are electrically and mechanically connected to each other, and the elastic body and the rotor electrode are electrically connected to each other, and electrical continuity is established between one of the elastic bodies and the protruding piece of the rotor side pull-out terminal. A variable ceramic capacitor characterized in that a magnetic material is arranged so that a rotor electrode can be rotated with respect to a stator electrode so that the mutually facing area can be varied.