JPS6042536Y2 - radio receiver with clock - Google Patents

Description

[Detailed explanation of the invention] This invention is based on a function switch (OFF -0N-A).
This invention relates to a radio receiver with a clock that has a radio sound/buzzer sound selection switch.

Conventional radio receivers with a clock of this type were used by setting the function switch to the AUTO side and selecting whether to emit a radio sound or a buzzer sound as an alarm sound using a radio sound/buzzer sound changeover switch.

When the function switch was turned on, the radio sound only sounded regardless of the radio sound/buzzer sound selection switch (no matter which side the switch was on).

In contrast, the present invention allows the buzzer sound to be inserted into the radio sound when the function switch is turned on and the radio sound selection switch is set to the buzzer sound side, even when listening to a radio broadcast, and at a preset time. This is what I am trying to inform you about.

The present invention will be explained below with reference to the drawings.

The drawing is a block diagram of a radio receiver with an LCD (liquid crystal) display type clock showing an embodiment of the present invention.

In the figure, 1 is a tuner section of a radio receiver, 2 is an audio section of a radio receiver, 3 at 3 b is a W switching transistor for radio, 4 is a clock drive section using an LSI, 5 is a clock display section using an LCD, 6 is an antenna, and 7 is a speaker.

EA is a power source (4,5V) for the radio receiver, and E,1 is a power source (1,5V) for the clock drive unit.

S□-1 and S□-2 are first and second radio sound/buzzer sound changeover switches.

The first radio sound/buzzer sound changeover switch 51-1 has a buzzer sound side first fixed terminal b1 connected to a resistor R1 and a capacitor C.
0 to the audio section 2, and the buzzer sound side 2nd
The fixed terminal b'1 is the buzzer out of the clock drive unit 4.
connected to terminal 8, radio sound side first and second fixed terminal a;
a' is an idle terminal.

The second radio sound/buzzer sound changeover switch 51-2 has the first fixed terminal on the buzzer sound side connected to the input terminal 9 of the audio section 2.
is connected to the radio sound side first and second fixed terminal a2? ”2
is a play terminal.

52-U 52-2 is a first and second function switch (OFF-ON-AUTO changeover switch).

The first function switch S2-□ has the AUTO side first fixed terminal g1 connected to the second fixed terminal b'2 of the second radio sound/buzzer sound changeover switch 51-2, and the AUT
O side second fixed terminal g't is connected to ground 10 and O
The N-side first fixed terminal f1 and the second fixed terminal f'□ are connected to the collector and emitter of the switching transistor 3a, respectively, and the OFF-side first and second fixed terminals e1. Either e' is an idle terminal.

Further, the second function switch 52-2 is set to AUTO.
The side first fixed terminal g2 is the Co1on of the watch drive unit 4.
Connected to t terminal 11, AUTO side second fixed terminal g'+
is connected to the AUTO display signal input terminal 12 of the clock display section 5, and the OFF side first fixed terminal e2 and second fixed terminal e'
2 is the alarm control 5t of the clock drive unit 4
Connected to the OP terminal 13 and the VDD terminal 14, respectively, and turned ON.
side first and second fixed terminals f2. f'2 is an idle terminal.

The operation of the clock radio receiver constructed in this manner will now be described.

(I) Function switch S2-□, 52-2
When the power is set to OFF.

At this time, the line 15 between the emitter and collector of the switching transistor 3a is opened, and the Al
arm control 5 top terminal 13 is connected to VDD terminal 14,
Since no output is generated from the terminal 16, the power supply circuit 17 to the tuner section 1 and the audio section 2 is cut off, and neither radio sound nor buzzer sound is generated.

(n) Function switch S2-□? 82-
2 is set to AUTO.

At this time, since the Co1 on out terminal 11 of the clock drive section 4 and the AUTO display signal input terminal 12 of the clock display section 5 are connected, the "AUTO"
"TO" will be displayed.

And alarm control of clock drive unit 4
Since the OP terminal 13 is opened, the alarm control out of the clock drive unit 4 is performed at a preset time.
Outputs are generated from terminal 16 and buzzer out terminal 8, respectively.

When these outputs are generated at a predetermined time, if the first and second radio sound/buzzer sound changeover switches 51-1 and 51-2 are set to the radio sound side, only the radio sound is generated from the speaker 7. , if the first and second radio sound/buzzer sound changeover switches 51-1, 51-2 are set to the buzzer sound side, the input terminal 9 of the audio section 2 is grounded and the radio sound is muted. Therefore, only the buzzer sound is generated from the speaker 7.

(III) Function switch 52-1, 52
-2 is set to ON side.

(position shown). At this time, switching transistor 3
Since the emitter and collector of a are short-circuited, power is constantly supplied to the tuner section 1 and the audio section 2, and radio sound is emitted from the speaker 7.

At this time, Alarm control 5 top terminal 13
Since it is not connected to the VDD terminal 14, an output is generated from the Buzzer out terminal 8 at a preset time, so the first and second radio sound/buzzer sound changeover switches S1-□, 51-2 turn on the buzzer. If it is set to the sound side, the buzzer sound will be heard in the radio sound.

Incidentally, at this time, the radio sound may be configured to become smaller or disappear.

As mentioned above, the function switch (OFF-ON-A
In conventional clock radio receivers that have a radio sound/buzzer selector switch (UTO selector switch) and a radio sound/buzzer selector switch, when the function switch is set to the ON side,
In other words, the buzzer could not be sounded to notify the time while listening to a radio broadcast, and the buzzer could only be sounded as an alarm when the function switch was set to the AUTO side. .

In contrast, according to the present invention, it is possible to make a buzzer sound for time notification at a predetermined set time even while listening to a radio broadcast, thereby increasing the convenience of use.

Of course, you can choose between a radio sound or a buzzer sound as an alarm, and if the selector switch is in the on position,
Radio sound can be heard regardless of the function switch position, and operability is good.

[Brief explanation of the drawing]

The drawing is a block diagram showing an embodiment of a clock radio receiver according to the present invention. 51-0. S□-2...Radio sound/buzzer sound selection switch, 52-1, 52-2...Function switch, 4...Clock drive unit.

Claims (1)

[Claims for Utility Model Registration] A tuner section, an audio section that amplifies an audio signal, a clock drive section that generates an alarm control signal and a buzzer signal at a preset time, and a power line for the audio section. It consists of an inserted switching transistor, a changeover switch that can be changed to the radio side and the buzzer side, and a function switch that can be changed to OFF/ON/AUTO positions. When the power supply line is open and the changeover switch is in the on position, the power supply line to the tuner section and the audio section is closed, and the output signal of the tuner section is transmitted to the audio section regardless of the switching position of the function switch. and if the function switch is set to the buzzer side, a buzzer signal output from the clock drive unit at a predetermined time is applied to the audio unit via the function switch set to the buzzer side, Therefore, a buzzer sound is mixed into the radio sound, and when the changeover switch is in the auto position, the switching transistor is made conductive by an alarm control signal output from the clock drive section at a predetermined time, thereby controlling the tuner. If the function switch is set to the radio side, the output signal of the tuner section is applied to the audio section, while the buzzer signal output from the clock drive section is applied to the audio section. application to the audio section is blocked;
A radio receiver with a clock configured such that when the buzzer signal is set to the buzzer sound side, the buzzer signal is applied to the audio section, while the output signal of the tuner section is bypassed.