JPS6237189Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an hourly clock that can warn of a drop in the voltage of a dry cell battery that is a clock drive source, and can also control external equipment at a set time.

[Conventional technology]

Conventionally, in a timer that turns on a contact at a predetermined set time, a contact spring is brought into elastic contact with a cam driven by a clock movement driven by a dry battery, and the contact is turned on or off depending on the rotational position of the cam. As a result, sufficient driving force for the cam cannot be obtained and the strength of the contact spring cannot be increased.

[Problem that the invention attempts to solve]

In this way, in conventional timers, etc., the contact spring pressure cannot be made large, so it is not possible to directly control a large load that passes a large current. Also, if the voltage of the dry cell drops and the clock movement stops before the set time, it becomes impossible to control the load at the set time, which can cause a major problem.

[Means for solving problems]

This invention solves all of these conventional problems at once, and consists of an alarm generation circuit that outputs an alarm sound signal to the clock at the set time, and an inaudible signal that normally outputs an inaudible signal with a different frequency from the alarm sound signal. and a signal generation circuit that stops outputting this inaudible signal when the voltage of the dry battery drops below a specified voltage,
A first filter that passes an alarm sound signal to an external device connected to this watch, a second filter that passes an inaudible signal, and a second filter that inputs the alarm sound signal output from the first filter. a gate circuit that outputs this alarm sound signal only when an inaudible signal is being output from the second filter; an alarm that operates when the second filter no longer outputs the inaudible signal; and an alarm that is output from the gate circuit. The device is equipped with a switching circuit that turns on electricity to the load in response to a sound signal.

[Effect]

A heavy load can be controlled in a switching manner by the alarm sound signal sent from the clock, and a drop in the voltage of the dry battery can be detected by the presence or absence of an inaudible signal also sent from the clock.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

In the figure, reference numeral 1 is a clock, and the clock movement 2 has a reference contact 3 that turns on when a predetermined alarm time is reached, and when the reference contact 3 turns on, it operates and emits an alarm sound signal. The alarm generating circuit 4 that generates the alarm signal, the speaker 5 that generates the alarm sound signal, the dry battery 6 that drives the clock movement 2 and the alarm generating circuit 4, and the voltage of the dry battery 6 is detected, and when this voltage drops below a specified voltage, a voltage drop signal is generated. The output dry battery voltage detection circuit 7 normally emits an inaudible signal having a frequency outside the audible frequency band of the alarm sound signal, but when a voltage drop signal is input, a signal that stops generating the inaudible signal. It is composed of a generating circuit 8.

On the other hand, 10 is an external device connected to the watch 1 with a single lead wire, including a filter 11 that passes an alarm sound signal in the audible frequency band, a filter 12 that passes an inaudible signal, and a filter 12 that passes an inaudible signal. A detection circuit 1 outputs a gate-on signal when an audible signal is input, and outputs an alarm signal when an inaudible signal is not input.
3. A gate circuit 14 that outputs an alarm sound signal from the filter 11 in response to a gate-on signal, a buzzer 15 that operates and sounds in response to an alarm signal, and a gate circuit 1
4, a drive power source 17 for the transistor 16, and a load 18 controlled to be turned on and off by the transistor 16.

In such a configuration, when the voltage of the dry battery 6 is higher than the specified voltage, the signal generating circuit 8 is transmitting an inaudible signal, and this inaudible signal is sent to the external device 10 via the lead wire and filtered. 1
2 and is input to the detection circuit 13. As a result, the detection circuit 13 outputs a gate-on signal to the gate circuit 14. At this time, the signal for driving the buzzer 15 is not output. In this state, when the alarm setting time arrives, the reference contact 3 is turned on and an alarm sound signal is transmitted from the alarm generation circuit 4 and the speaker 5
At the same time that the alarm signal is activated and generates an alarm, this alarm sound signal is sent to the external device 10 via the lead wire, passes through the filter 11, and is input to the gate circuit 14. Since the gate circuit 14 is on, the alarm sound signal is input to the base of the transistor 16, turning it on. As a result, current flows from the drive power source 17 to the load 18 and the load operates.

Next, when the voltage of the dry battery 6 drops below the specified voltage, the dry battery voltage detection circuit 7 detects this and outputs a voltage drop signal, which is sent to the signal generation circuit 8. As a result, the inaudible signal that was being output from the signal generation circuit 8 is stopped. As a result, the inaudible signal that was output from the filter 12 disappears, so the detection circuit 13 stops the gate-on signal and
4 is turned off, and the load will not operate even if an alarm sound signal is being sent. At this time, the buzzer 15 simultaneously sounds to notify that the voltage of the dry battery 6 has decreased.

Since only the dry cell voltage detection circuit 7 and the signal generation circuit 8 are added to the watch side in addition to the usual parts, there is only a slight increase in cost. People who only need the alarm function need only have this watch 1. A person who wants to control a large load using an alarm sound signal will connect the external device 10 separately to the clock.

Since the watch 1 generates two signals with different frequencies and the external device 10 receives these signals separately through a filter, only one lead wire is required to connect the two, which simplifies wiring. Further, in the watch 1, since the signal for detecting the voltage drop of the dry battery 6 is a signal of an inaudible frequency, it will not sound even if it is input to the alarm speaker. In addition, since an inaudible signal is output during normal operation, when the signal generation circuit 8 fails or a connection failure occurs in the lead wire wiring, the buzzer 15 can sound to report the abnormality. Circuit reliability can be improved.

[Effect of idea]

As explained above, according to the notification clock according to the present invention, the clock can be configured by simply adding a few parts to an existing alarm clock, and those who only want the alarm function only need to have this clock, and external This means that only those who wish to control large loads need to prepare external equipment, which is overall economical.

In addition, the clock and external device can be connected with a single lead wire, simplifying wiring, and it is also possible to detect a drop in the voltage of the dry cell battery that drives the clock, making the clock's alarm and external device load control extremely reliable. It has the effect of increasing the price.

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment of the notification clock according to the present invention. 1... Clock, 3... Reference contact, 5... Speaker, 6... Dry battery, 10... External device, 14...
Gate circuit, 15...buzzer, 17...drive power supply.

Claims (1)

[Claim for Utility Model Registration] An alarm generation circuit that operates when a clock movement reaches a predetermined set time and outputs an alarm sound signal, which normally outputs an inaudible signal with a frequency band different from that of the alarm sound signal, A clock equipped with a signal generation circuit that stops outputting the inaudible signal when the voltage of a dry cell battery that drives the alarm generation circuit and the clock movement drops below a specified voltage, and a first filter that allows the alarm sound signal to pass.
a second filter that allows the inaudible signal to pass; a gate circuit that receives the alarm sound signal output from the first filter and outputs the alarm sound signal when the second filter outputs the inaudible signal; An alarm clock that operates when an inaudible signal is not output from the second filter, and an external device that includes a switching circuit that turns on electricity to the load based on the alarm sound signal that is output from the gate circuit. .