JPS58162886A - Electronic timepiece - Google Patents

Abstract

PURPOSE:To enable the inspection of a step motor in the assembled state of a timepiece by making it possible to turn off all of the transistors connected to the terminals of the step motor. CONSTITUTION:When a signal is inputted to an input terminal 27 in order to measure the performance of a step motor 26, all the transistors 28-33 connected to both terminals of the motor 26 are turned off. During this time, the various characteristics of the step motor are measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit for a so-called analog electronic timepiece that displays time and the like using hands.

A block diagram of a conventional analog electronic watch circuit is shown in Figure @1. FIG. 3 is an example of a circuit diagram of a part of the drive circuit 5 and rotation detection circuit 6 shown in FIG. 1, and the simple operation and rotation detection principle will be explained step by step below.

In FIG. 3, 10 is a drive circuit, and 11 is a part of a rotation detection circuit.

Hereinafter, a brief explanation of the conventional operation will be given in the order of the waveform diagram shown in FIG.

First, the waveforms from the input terminal 13 shown in FIG. 31a to the waveform shown in FIG.
5 LA (G), input terminal 16 the waveform of Figure 5 (B) and (b).
), the transistors 17 and 1 shown in FIG.
8 is turned on, and current in the direction A flows to the step motor 19. After a short time has elapsed after the step motor has finished rolling, the transistor 137ft remains turned on, and the transistors I and 21t are turned on alternately to detect rotation.

After that, if it is determined by this rotation detection that the rotation is non-rotating and ε is detected, a re-driving pulse as indicated by the dotted line is immediately applied.

Of course, if it is determined that the rotation has stopped, no re-driving pulse will be applied.Once these series of operations are completed, the fifth
The waveform in Figure ←) is input to the input terminal n, and the waveform in Figure 5 φ) is input to the input terminal 1eKs1g5, and the waveform in Figure (g) is input to the input terminal 23.
Next, the waveform shown in FIG. 5 is inputted to the input terminal 14, and the same operation is performed.

In this case, it goes without saying that the current flowing through the step motor 19 is directed toward the mouth.

The above operation is repeated KID every second when the watch moves (for example, every second if the watch moves one second) to ensure that the watch operates at regular intervals. However, such a conventional control method using only drive signals and rotation detection signals has the following drawbacks.

For example, the transistors l 17 , 18 , 20 , 21 in a clockwise state (both gsK drive circuits 10 of the step motor 19 and 6- of the rotation 11)
, 24.

If you want to measure the performance of the step motor as a single unit in the state in which δ is connected, the only way to measure the performance of the step motor is to apply an alternating voltage as shown in No. 2K from the outside to both ends of the step motor 190. Six transistors 17, 18, 2 of the circuit and rotation detection circuit
0, 21, 24, 25 are taroting shapes 11
When the above-mentioned alternating voltage is applied, the potential of each gate is not fixed, so the current that flows will cause some transistors to become zero, and the effect of parasitic diodes specific to transistors will also be affected. As a result, a current bypass circuit other than the step sweater 19 is created, so the characteristics of the step motor such as current consumption are correct! ! Experiments have shown that Km cannot be determined. In fact, in order to actually perform these measurements, it is necessary to first remove the circuit block, apply the alternating voltage to the step motor and measure its performance, and then reinstall the circuit block. This is extremely inconvenient and inefficient.

There is also a method of measuring the characteristics of a step motor with a circuit block attached, but with this method, even if you try to measure only the characteristics of the step motor, the characteristics of the circuit block will be involved, so the performance of the step motor as a single unit cannot be measured. It has the disadvantage that it cannot be obtained.

The present invention aims to eliminate the above-mentioned drawbacks of the conventional technology.
), it reduces the process of measuring the performance of a single step motor, and it also enables performance measurement 11CH.
The purpose of the present invention is to provide a stepper that can reduce the time required to perform the process, and reduce the cost of machinery, equipment, and personnel.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

Block l1iI of the analog electronic watch circuit according to the present invention
1 is shown in FIG. 2, and the simple operating principle of the block diagram shown in FIG. 2 will be described below using the circuit diagram shown in FIG.

This is the 6th step motor % performance measurement.
Before inputting the voltage waveform shown in the figure to the input terminal 27, input the waveform shown in Fig. 7 to the input terminal 27.
The six transistors y~o that passed through -u all become OFl. (The r channel is at high level, the low level power is input to the channel transistor through the inverter 34! A,) After setting the transistor to this state, the voltage is changed as shown in FIG. It is input to both ends of the step motor to measure various types of bait. In this way, the six transistors 3~''B that are connected to both sides of the step motor are forcibly turned off by the gate input signal, so the current bypass circuit as described above is not created, and the step motor can be operated independently. It is possible to accurately measure the various characteristics of the clock.This has already been confirmed through experiments.However, if you want to accurately measure the various characteristics of the assembled clock, it is necessary to attach the p1 with the enclosure block removed. By providing an input terminal outside the IC and inputting a control signal as shown in Figure 7 from there, the above condition I can be achieved.
This is possible by simply maintaining all the 011 pins of the transistors. Note that providing one input terminal outside the XO is a very small thing when viewed from the overall IO configuration, and the The cost increase is next to nothing.

As described above, the present invention enables accurate determination of the performance of the step motor as a single unit when assembled as a timepiece.

■ Eliminates the process of removing and attaching the circuit plotter, which is required for conventional manual measurements.

(2) For the reason of (1), it is possible to shorten the time for performance measurement Kl', and to provide a step machine that can significantly reduce the cost of machinery and equipment and labor costs.

There are various remarkable effects such as.

Note that these methods are very effective when measuring the performance of a step motor as a single unit when the circuit plotter and the four-wheel motor have a structure in which they are integrated and released.

[Brief explanation of drawings]

Fig. 1 shows a boot diagram of a conventional digital watch circuit, Fig. 2 shows a block diagram of a circuit for an analog electronic hour hand according to the present invention, and Fig. 3 shows a conventional circuit for an electronic watch. In the figure, To9, Figure 4 shows an example of the circuit diagram for an electronic timepiece according to the present invention, and KIE5WA shows the drive and rotation detection waveforms applied to the gates of each transistor in Figures 3 and 4. Figures 1s3 and 4 are diagrams showing voltage waveforms applied to both ends of the step motor, and Figure 7 is a diagram showing control signals according to the present invention. 16. Power supply, 200 oscillation circuit, 300 frequency dividing circuit, 40.
Waveform synthesis circuit, 5... Drive circuit 16... Rotation detection circuit,
76. control circuit, 80. Step motor, 90. Control signal generation circuit, 10, 36, , drive circuit, 11.3
7. , rotation detection circuit, a0. Control signal generation circuit, 13
, 14 , 15 , 16 , 22 , Z3 , 39
, 40.41, 42, 43, 44. , input terminal, 17
, 18e 20 e 21 # 24 p 25 @
28 @ 29 e 30 m 31 m 32 e
33--Transistor, 19, 26. , step motor, ah. , inverter, 45, 46. , Orgate, 47.4g
, 49, 50. , AND gate, ah, 5160 rotation detection rotation detection circuit Above 2u Fig. 3

Claims (2)

[Claims] (1) A control signal generation circuit is installed in an electronic clock that is intercepted by a power supply, oscillation circuit, frequency division circuit, waveform synthesis circuit, drive circuit, rotation detection circuit, control circuit, and step motor. An electronic clock that features: (2) The signal generated from the control signal generation circuit is input to the gates of all the transistors connected to the step motor terminal, and all the transistors are brought to 0FIP. electronic clock.