JPS5814075A - Clock with accessory mechanism - Google Patents

Abstract

PURPOSE:To make it possible to use a battery effectively by shutting off an oscillation circuit and frequency divider circuit and other circuits from the battery at starting an accessory mechanism that requires a large starting current and supplying them condenser current. CONSTITUTION:When output is generated from a drive circuit DR2 at a desired time, a switch S is controlled through a timer circuit TM during the timer period so as to shut off a dribe circuit DR1 and other circuits that include a clock pulse generator CL, a frequency divider circuit, etc. from a power source battery E, and those circuits operate normally by the discharge current of a condenser C. Diring the timer period of a certain length a transistor T is turned ON through the circuit DR2, and accessory mechanism of a motor M2 and so on that require a large starting current are supplied a large current from the battery E. Voltage drop in the battery E due to this curent has no effect on the generator CL, the circuit DR1, etc. Accordingly, if the shut-off of the switch S is restored after the timer period is passed, whereupon the accessory mechanism becomes stable and the mormal voltage is left in the battery, the battery E has not to be replaced; it can be used continuously with the result of effective use of battery.

Description

[Detailed description of the invention] The present invention relates to a watch with an additional mechanism.

For example, the starting current of DC motors or lamps is much higher than the steady current, and if these are used as an additional mechanism in a watch, the battery voltage will drop when starting up, so when the battery is depleted to a certain point, the additional mechanism will start. Occasionally, oscillation may stop or a frequency division error may occur.

That is, during steady operation of the additional mechanism, the battery is replaced even though oscillation and frequency division are performed normally and there is still some current and voltage remaining, and the battery is not utilized effectively.

Therefore, the present invention provides a timepiece with an additional mechanism in which the circuit including the oscillation and frequency dividing section and the battery are cut off for a certain period of time when the additional mechanism is activated, and the operation is maintained by a capacitor during this period. .

Hereinafter, one embodiment of the present invention will be described based on the drawings. A
is an integrated circuit for a clock, OL is a clock pulse generator consisting of an oscillation and frequency dividing section, DR is a drive circuit for the tri motor M1, DR is a drive circuit for the DC motor M2 which is an additional mechanism, TM is a timer circuit, and S is a timer circuit. It is a switching circuit. C is a capacitor connected in parallel to the clock pulse generator OL, drive circuit DR, and timer circuit TM. T is a transistor and E is a battery.

In the above configuration, when the DC motor M2 is not operating, the timer circuit TM is held in an inoperative state and the switching circuit S is open. A battery E is supplied to each circuit of the 1ζth integrated circuit A, and a capacitor C is charged. The drive circuit DR receives the output from the clock pulse generator OL and drives the motor M1, so that the time display is incremented.

Then, when an output is generated from the drive circuit DR2 at a desired time,
The DC motor M2 is driven to operate the additional mechanism. The current when the DC motor M 2 u % is started is very large, about several times as large as during steady operation, and the battery voltage drops significantly. Therefore, the timer circuit TM generates an output for the time required for this startup, and the switching circuit Bf is turned off to cut off the battery E.

During this time, the clock pulse generator OL, drive circuit D
The operation of R2 and the timer circuit TM is maintained by the charging of the capacitor C and the voltage. This time is several tens of milliseconds, and in commonly used watch integrated circuits, the impedance of the clock pulse generator OL, drive circuit DR1, etc. is approximately several tens of kilohms.
If a capacitor of about 0 μF is used, the discharge time constant with the capacitor C will be several hundred milliseconds, and operation can be maintained sufficiently.

When the DC motor M2 shifts to steady driving, the output from the timer circuit TM stops, the switching circuit 8 turns on,
Switch to battery E.

Although omitted in the above explanation, starting of DC motor M2 is set so as not to overlap with driving of motor M1, and this prevents motor M1 from stopping due to voltage drop due to starting of DC motor M1. ing.

In the above embodiment, a DC motor was used as the additional mechanism, but it can also be used as an additional mechanism, such as a lamp or a light emitting diode.
, can be applied to anything where the current is significantly larger than the steady state current.

As described above, according to the present invention, when the additional mechanism is activated, the circuit including the oscillation and frequency dividing section and the battery are cut off for a certain period of time, and the operation of the circuit is maintained by the capacitor. Even if the battery voltage drops significantly due to startup, the oscillation and frequency division sections are not affected. Therefore, while the additional mechanism normally performs oscillation and branching during steady operation and the voltage remains, the battery can be used, and the battery can be used effectively.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. OL... Clock pulse 'fill C...
・Capacitor TM...Timer circuit S...Switching circuit M2...More than DC motor 5-

Claims (1)

[Claims] The first current of starting snow has an additional mechanism that is significantly larger than the steady current, and a first circuit is configured by connecting a capacitor in parallel to the circuit including the oscillation and frequency division parts of the watch integrated circuit.
A timer circuit with a gold-plated additional mechanism, in which a switching circuit is connected between the circuit and the first pond, and when the additional mechanism is activated, the switching circuit is controlled for a predetermined period of time to cut off the connection between the battery and the first circuit.