JPS6247109Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electronic time signal clock.

Conventionally, there is an electronic time signal clock that automatically stops ringing during a certain time period at night, but this clock uses a counter to count the number of hours on the hour and makes a time signal based on the count. Therefore, when starting a clock, etc., the contents of the counter must be adjusted to the displayed time. To perform this adjustment, some devices are provided with a button for setting the morning time and a button for setting the afternoon time. That is, if the current time is in the morning, the button for setting the morning time is used, and if it is in the afternoon, the button for setting the afternoon time is used to set the time in 12-hour format. Therefore, press 2 buttons for settings.
However, the cost was high. If you try to set the time with one button, you will have to set it in 24-hour format, making the operation complicated.

Therefore, the present invention provides an electronic time signal clock in which morning and afternoon settings are made using a second hand stop switch.

An embodiment of the present invention will be described below based on the drawings. 1 is an oscillator, 2 is a frequency divider, 3 is a drive circuit for a motor 4, and the motor 4 is used to advance a time display hand (not shown). 5 is a decimal counter that counts the hour, 6 is a flip-flop circuit that constitutes a memory circuit that inverts the output state every 12 hours and generates morning and afternoon outputs, and 7 is a flip-flop circuit that inverts the output state every 12 hours to generate morning and afternoon outputs. to 5 a.m.) and prohibits the time signal. 8 is a time signal circuit. 9 is a gate circuit, 10 is an inverter, and 11 to 13 are differentiating circuits. 14 is a set switch, and 15 is a second hand stop switch.

Next, the operation will be explained. Normally, switch 15 is set to “PM・START” or “AM・START”.
START" side, the reset of the frequency divider 2 is released and the motor 4 is driven. Also, the switch 14 is on the "LOCK" side.

Then, when the hour comes, a contact signal (from a switch operated by the minute hand cam) is supplied to terminal P.
The contents of the counter 5 are incremented by one, and the time signal circuit 8 generates a time signal sound based on the contents. however,
From 11:00 pm to 5:00 am, the detection circuit 7 generates an output and time reporting is prohibited.

Next, the case of time adjustment will be explained. When the second hand indicates 0 seconds, set the switch 15 to the "second stop" position. This resets the frequency divider 2 and stops the second hand. Next, use the hand turning knob (not shown) to set the hour and minute hands to the desired time. Then, slide the switch 14 to the "SET" side. This slide generates one pulse from the differentiating circuit 11, and the counter 5 is reset. At this position, the switch 14 is closed the required number of times to set the contents of the counter 5 to the current time.

Then, according to the time signal, etc., if the current time is in the morning, the switch 15 is closed to the "AM/START" side, and if it is in the afternoon, the switch 15 is closed to the "PM/START" side. As a result, the reset of the frequency divider 2 is released and the clock starts running, and the flip-flop circuit 6
is reset or set, and AM or PM is set.

Note that the switch 15 may be provided with a configuration for forcibly regulating the second hand to the 0 second position when the switch 15 is set to the "seconds stop" position.

Further, the nighttime ringing stop time period may be changed by external operation.

As described above, according to the present invention, since the second hand stop switch also serves as the AM and PM setting switch, the configuration is simple and the operation is also simple.

[Brief description of the drawings]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. 5...Counter, 6...Flip-flop circuit, 7...Prohibition circuit, 8...Time signal circuit, 14...
Set switch, 15...Second hand stop switch.

Claims (1)

[Scope of utility model registration request] A decimal counting circuit that counts the number on the hour, a memory circuit that receives the output of this counting circuit and changes its output state every 12 hours, and a time signal that indicates the hour on the hour based on the output of the counting circuit. a prohibition circuit that prohibits time reporting during a predetermined time period based on the outputs of the counting circuit and the memory circuit; a first switch that modifies the contents of the counting circuit; and a second switch for setting the morning and afternoon by setting the output state of the memory circuit through other operations.