JPS5934993Y2 - air trimmer capacitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air trimmer capacitor used in a quartz watch.

Traditionally, crystal watches generally had an accuracy of ±10 to ±15 seconds per month, but with advances in electronics,
It has become possible to create a crystal clock with an annual difference of ±5 seconds to ±20 seconds.

In this case, the adjustment is performed using a trimmer capacitor as in the past.

Therefore, the trimmer capacitor must also be easy to adjust, and a capacitance lower than that of conventional trimmer capacitors is required.

In this case, the size of the trimmer capacitor is considerably limited by the shape of the clock, and the shape of the rotor electrode changes from φ3 to approximately φ2, making it difficult to reduce the capacitance.

The trimmer capacitor has the shape shown in FIGS. 1 and 2, but when adjusting the capacitance, a screwdriver is pressed against it from above, which causes distortion and causes the rate to change over time.

In order to overcome the above drawbacks, there is an air trimmer capacitor shown in FIG.

With air trimmer capacitors, it is possible to form trimmer capacitors with low capacitance, but conventional air trimmer capacitors are large in size and require a considerable amount of space for crystal watches that aim to be thinner and more compact. It had drawbacks such as being difficult to use.

The purpose of this invention is to form an air trimmer capacitor directly on the circuit board in order to eliminate the above-mentioned drawbacks, and to realize an air trimmer capacitor that can be installed in a thin and compact yearly difference crystal clock and that can easily adjust the rate. It is.

Next, embodiments of the present invention will be described.

Figure 4 shows the trimmer capacitor provided on the circuit board.

1 is a circuit board having patterns 5a and 5b, and the circuit board 1 is adhesively fixed to a reinforcing plate 3 made of metal.

Reference numeral 2 denotes a rotor electrode member having a flange portion 2a, which is engaged with a rotor pin having a threaded groove 4a that engages with the hole 3a of the reinforcing plate 3 with a shimmy.

At the time of adjustment, the rate can be adjusted by engaging a driver (not shown) in the screw groove 4a and rotating it.

FIG. 5 shows patterns 5a and 5b formed on the circuit board 1.
This shows the relationship between the flange 2a and the flange 2a provided on the rotor electrode member 2 to adjust the capacity.

Pattern 5a is a terminal extending from the crystal shown in FIG. 6, and pattern 5b is a terminal on the ground side.

As the rotor electrode 2a rotates, the area intersecting the pattern 5a changes, so the capacitance changes and rate adjustment becomes possible.

As described above, according to the present invention, since the trimmer capacitor is formed integrally with the circuit board, there is less space for mounting.

In the case of rate adjustment, since the metal reinforcing plate is in contact with the rotor pin, there is no distortion in the trimmer capacitor, and the factor of rate change over time can be eliminated.

Since the trick capacitor uses a patterned circuit board, the number of parts can be reduced.

[Brief explanation of drawings]

1 and 2 show a conventionally used trimmer capacitor, and FIG. 3 shows a conventional air trimmer capacitor. Figure 4 shows an embodiment of the present invention. Figure 5 is a cross-sectional view of the circuit block, Figure 5 is a plan view showing the relationship between the circuit board pattern and the rotor electrode, and Figure 6 is the annual difference crystal. This shows an oscillation circuit diagram used in watches. 1... Circuit board, 4... Loaf pin, 2... Rotor electrode, 5a, 5b... Pattern, 3... Reinforcement plate.

Claims (1)

[Scope of utility model registration request] An air conditioner characterized in that a pattern formed on a circuit board is provided with a part having a fan-shaped flange, and a pin having a screw groove is engaged with a reinforcing metal plate provided integrally with the circuit board. trimmer capacitor.