JPS6223151Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a radio receiver with a clock/timer that is configured to switch and display the reception frequency of the radio and the current time on a single display. The present invention relates to a radio receiver with a clock and timer, characterized in that the radio receiver is configured to display the current time when the current time is displayed.

Generally, a radio receiver with a clock/timer is
It is constructed as shown in the figure, with a radio section 1 and a clock section 2.
The display output data of the timer unit 3 are displayed on the display 5 by being switched by the display switching circuit 4. In this case, when the operation keys 6, 7, and 8 of the radio section 1, clock section 2, and timer section 3 are operated, display output data corresponding to the operated key is transferred from the display switching circuit 4 to the display 5. When the radio power is turned off, the display switches to the time display, and when the radio power is turned on again, the display switches to the reception frequency display.

Therefore, due to the timer operation, the timer section 3
When the matching circuit 9 detects that the operating time set in 1 and the time of the clock section 2 match, and the relay 10 is activated, the relay contact 12 connected in parallel to the power switch 11 of the radio section 1 is closed. The receiving frequency is always displayed.

However, it is common for a radio to turn on with a timer when it is used as an alarm clock, and it is more convenient and preferable for the person who wakes up to see the time rather than the reception frequency. During operation, since the reception frequency of the radio is displayed, it was necessary to operate the operation key 7 of the clock section 2 to switch the reception frequency display to the time display.

Therefore, the present invention has been devised in view of this point, and provides a radio receiver with a clock and timer configured to display the current time when the radio power is turned on by timer operation.

The display switching circuit improved by the present invention will be explained below with reference to FIG.

13, 14, 15 are reception frequency indications,
This is a flip-flop for displaying the current time and timer time, and is composed of a set-priority flip-flop. A flip-flop 13 for displaying the received frequency has an OR gate 16 and an AND gate connected to the set input S.
The gate 17 is connected, and the operation key 6 of the radio section 1 is pressed.
It is configured to be set by the output of the one-shot multivibrator 18 which is operated by the key signal _S1 from the power switch 11 and the signal _S2 caused by the ON of the power switch 11 and the closing of the relay contact 12. Next, the current time display flip-flop 14 is connected to the set input S.
The OR gate 19 is connected to the output of the one-shot multivibrator 20 and the power switch 11, which are operated by the generation of the key signal _S3 from the operation key 7 of the clock section 2 and the coincidence detection signal _S5 from the coincidence circuit 9.
It is configured to be set by the output of the one-shot multivibrator 21 which is operated by turning off and opening the relay contact 12. The output of the one-shot multivibrator 20 is connected to the inverter 22.
The signal is also supplied to one input of the AND gate 17 through the gate. The flip-flop 15 for displaying the timer time is connected to the operation key 8 of the timer section 3.
It is configured to be set by a key signal _S4 from. Also, each flip-flop 13,1
The outputs of the OR gates 23 to which the set signals of the flip-flops 13, 14, and 15 are input are commonly connected to the reset inputs R of the flip-flops 13, 14, and 15, respectively. Furthermore, respective flip-flops 13, 14, 1
The set outputs Q of 5 are received frequency data from radio section 1, clock section 2, and timer section 3, respectively.
D ₁ , current time data D ₂ , timer time data D ₃
is connected to one of the AND gates 24 , 25 , 26 into which is input, and the outputs of the AND gates 24 , 25 , 26 are supplied to the display 5 via the OR gate 27 .

Next, the operation of the present invention having such a configuration will be explained.

First, the case where the radio power switch 11 is turned on will be explained. At this time, the output of the inverter 22 is at a high level, and the power switch 11 is turned on.
The one-shot multivibrator 18 operates, the AND gate 17 is opened, and the flip-flop 13 is set, thereby opening the AND gate 2.
4 is opened and the received frequency data _D1 is displayed on the display 5. At this time, flip-flops 14 and 15 are reset by the output of AND gate 17 via OR gate 23, and AND gates 25 and 26 are closed. When the operation keys 7 and 8 of the clock section 2 or timer section 3 are operated while the reception frequency is being displayed, the flip-flops 14 and 15 are set, the flip-flop 13 is reset, and the AND gate 24 is activated. Closed AND gate 2
5 or 26 is opened, the display 5
The current time or timer time is switched and displayed. Thus, the radio power switch 11
When turned on, the reception frequency, current time, and timer time can be switched and displayed as desired by operating the operation keys 6, 7, and 8.

Next, when the power switch 11 is turned off, the one-shot multivibrator 21 operates to
By setting the flip-flop 14 through the gate 19 and resetting the flip-flops 13 and 15, whatever display was previously displayed is switched to the current time display. When the radio power switch 11 is turned on again, the reception frequency is displayed on the display 5 by setting the flip-flop 13 as described above.

Next, the timer operation will be explained. At this time, the time at which the radio is to be operated is set in advance in the timer section 3 using the operation key 8 of the timer section 3, the radio power switch 11 is turned off, and the timer standby switch 28 is turned on. Then, when the timer operation time comes, a coincidence signal is sent from the coincidence detection circuit 9.
When _S5 occurs, relay 10 operates and relay contact 12
When the button is closed, the radio unit 1 is energized and the radio is operated. Therefore, if you set the timer operation time to the time you want to wake up, you can wake up to the radio broadcast. At this time, the one-shot multivibrator 20 operates due to the coincidence signal _S5 , setting the flip-flop 14 and inverting the inverter 22.
By closing the AND gate 17 via
Flip-flop 1 is activated by closing relay contact 12.
3 is set and becomes a receiving frequency table,
The current time is displayed on the display 5. Therefore, a person who wakes up can know the current time without any operation.

As mentioned above, the radio receiver with clock and timer of the present invention displays the reception frequency when the radio is turned on by turning on the radio power switch.
When the radio power is turned on by timer operation,
It is configured to display the current time, and is very convenient for people who have the habit of waking up to radio broadcasts because they can immediately know the current time when they wake up.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a radio receiver with a clock/timer, and FIG. 2 is a diagram showing a display switching circuit of the present invention. 1...Radio section, 2...Clock section, 3...Timer section, 4...Display switching circuit, 5...Display unit, 6,
7, 8...operation key, 9...coincidence detection circuit, 11
...Radio power switch.

Claims (1)

[Scope of utility model registration request] In a radio receiver with a clock/timer configured to switch between displaying the radio reception frequency and the current time on one display, when the radio power is turned on due to the timer operation, the display switching circuit changes to display the current time. A radio receiver with a clock/timer, characterized in that it is configured to switch to a display.