JPS6034076B2 - Fixed structure of trimmer capacitor for electronic watch - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a circuit for a quartz watch.

More specifically, the present invention relates to means for fixing and electrically connecting components such as trimmer capacitors for adjusting time accuracy that require manipulation for adjustment after circuit block construction. An object of the present invention is to improve the stability of parts such as a trimmer capacitor and to provide a thin watch.

Furthermore, it improves time accuracy. The present invention will be explained using figures.

FIG. 1 is an assembled cross-section of a conventional trimmer condenser attachment part.

Although not shown, a well-known trimmer capacitor consisting of a stator 2, a rotor 3, an adjustment shaft 4, and a fixing spring 5 is attached to a circuit board 1 on which a crystal oscillator and a MOSIC chip are attached by pins 6 and 7. As is well known, the time adjustment is the adjustment axis 4 of this trimmer capacitor.
Rotate using a screwdriver or the like. At this time, force is inevitably applied to the trimmer capacitor in the direction of arrow 8. This force will be received by pins 6 and 7. Therefore, a force as shown by the arrow 9 is applied between the caulked portion 5a of the fixed spring 5 and the stator 2. This is one of the reasons why the trimmer capacitor loses its stability. Figure 2 shows another example of the conventional method of fixing the trimmer capacitor. A trimmer capacitor or solder 10, 11 is attached to the circuit board 1. Mounting the trimmer capacitor as shown in Figure 2 eliminates the instability factors mentioned in Figure 1, but the trimmer capacitor must be stacked on the circuit board, making the circuit thicker. It had the disadvantage that it could not be obtained. The present invention eliminates the drawbacks of the above-mentioned drawbacks and provides a stable and thin circuit simply and reliably.

FIG. 3 shows an embodiment of the present invention.

The trimmer capacitor is guided by a fixing spring 5 of the trimmer capacitor and pins 12 and 13 provided in the ground, and is fixed by a screw 14.

The circuit board 15 is a flexible board consisting of an insulating layer 15a and a conductive layer 15b, and the conductive layer 15b has a MOS.
IC16 is attached and molded. The circuit lead board 17 has an elastic part 17a, and the insulating layer 1 of the circuit board 15
It is arranged on the 5b side. Conductivity on the gate side of the trimmer capacitor is ensured by contacting the conductive layer 13a of the circuit board 13 with the electrode surface 2a applied to the stator with a pressing force by the elastic portion 15a of the circuit lead plate.

By configuring the structure around the trimmer capacitor in this way, the force in the direction of the arrow 8 applied when operating the trimmer capacitor for time precision adjustment is applied to the flat portion 5b of the fixed spring 5.
The force in the direction of the arrow 9 is not generated.

Therefore, the capacitance of the trimmer capacitor is extremely stable during the adjustment process, and time precision adjustment can be performed quickly and stably. Furthermore, the cross-sectional position of the trimmer capacitor can be freely laid out, allowing for a thinner movement. In this way, the trimmer capacitor, which is adjusted after the movement is assembled, is positioned and fixed on the main plate using only the fixing spring of the trimmer capacitor, and conduction is established on one side by fixing the fixing spring with a screw, while the other conduction is connected to the electrode surface on the top of the stator. Because it is obtained by pressure-welding the lead plate of the circuit board, there is no tensile force in the direction perpendicular to the adjustment axis during adjustment, providing stable time accuracy.Furthermore, by fixing the trimmer capacitor to the main plate, the circuit board and By narrowing the gap between the main plates, it is possible to make the movement thinner.

[Brief explanation of the drawing]

Fig. 1, Fig. 2... Mounting part of conventional trimmer capacitor, Fig. 3... Mounting part of trimmer capacitor according to the present invention 1... Circuit board, 2.・
...Stator, 3... ...Rotor, 4...
...Adjustment axis, 5...Fixing spring. Labor/Kanen Otshugu side 31

Claims (1)

[Claims] 1 Consists of a circuit board containing a MOSIC and a time standard source, a trimmer capacitor for time precision adjustment, and a ground plate facing the circuit board, and the trimmer capacitor is fixed to a stator and a rotor provided coaxially, and a rotor. It is formed of an adjustment shaft, a fixed spring for pressing the rotor and the stator, and the fixed spring has a portion larger in diameter than the stator placed on the base plate, and a plurality of holes provided in the fixed spring. Alternatively, the trimmer capacitor is positioned in the plane direction by engaging the groove with a protrusion provided on the base plate, and a part of the trimmer capacitor is fixed to the base plate with screws to achieve fixation and conduction, and the stator is connected to the rotor. The MOSI has a larger diameter portion and the electrode surface provided on the upper surface of the larger diameter portion of the stator.
A fixing structure for a trimmer capacitor for an electronic watch, characterized in that it is formed by pressure contacting a lead plate connected to C.