JPS6058603B2 - automatic volume adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic volume adjustment device that automatically adjusts the volume by controlling a relay using a timer.

It is common practice in everyday life to combine a radio and a timer so that the radio automatically turns off when you go to bed, or turn on the radio automatically when you wake up, and use it as an alarm clock. It is being said.

If you use a two-stage timer to use it for sleeping and waking up, it is convenient because you can use one radio for sleeping and waking up, but the volume when going to bed and the volume when waking up are different. The sizes are completely different; in the former case, you want to make it as small as possible so that you can keep up with your surroundings or fall asleep, while in the latter case, you want to make it as large as possible because you don't want to be late for work, for example. Until now, there has been no combination of a timer and a radio that can distinguish between sleeping and waking up and automatically adjust the volume so that it is lower when sleeping and louder when waking up. The present invention aims to make life more convenient by providing an automatic volume adjustment device that can automatically turn on the speaker after a very simple operation before going to sleep, with a low volume when going to bed and a high volume when waking up. That is.

The present invention will be described in detail below with reference to the drawings.

In FIG. 1, 1 is a relay, which has movable contact pieces 1a, lb of a first and second switch, and a relay coil lc. The movable contact piece 1a of the second switch is on the contact a side, and the movable contact piece 1b of the second switch is on the contact c side as shown in Figure 1. It's getting old. Switch 3 is a non-lock switch (normally open switch) that is turned on (closed) to close the circuit while it is pressed, and immediately turned off (opened) to open the circuit when the pressure is released. be. A power switch (not shown) is also provided between the power supply terminals 7 and 8 for energizing the relay 1 and the power supply (not shown).
is inserted, and unless the power switch is turned on, even if non-lock switch 3 is turned on, relay coil 1 of relay 1
c is not energized. Now, when you turn on the power switch to listen to the radio, power is supplied to terminals 7 and 8, but unless the non-lock switch 3 is pressed, the relay coil 1c of relay 1 is not energized, so relay 1
is not activated and maintains the state shown in Figure 1, and the received radio signal is transmitted from terminal 5 to amplifier 2 without being attenuated via contact a of the first switch in the first state and movable contact piece 1a. From this point on, you can reach the speaker and listen to the radio broadcast. The volume at this time can be adjusted by adjusting the volume built into the amplifier 2. Next, you can turn down the radio broadcast you were listening to at normal volume to a low volume for bedtime and adjust the volume of amplifier 2 when you want to hear it better, but you can't do that while you're asleep, and you have to wake up at that volume to wake up the next morning. It is inconvenient to use as

Therefore, if you leave the volume of the amplifier 2 as it was before going to bed and press the non-lock switch 3 before going to bed, the coil 1c of the relay 1 will be energized and the movable contact piece 1a of the first switch will move from contact a to contact b. The movable contact piece 1b is moved from the contact c to the contact d side, and the movable contact piece 1b is moved from the contact c to the contact d side, so that the relay 1 has a non-locking switch. Even if the switch 3 is released, power is supplied through the terminal 7 and the contact d, so that the self-holding state, that is, the ON state of the contact d and the movable contact piece 1b is maintained, and the movable contact piece 1a of the first switch By moving to the contact b side, the level of the received signal from terminal 5 is divided and attenuated by resistors R1 and R2, so that the received signal having the attenuated level is applied to amplifier 2. The volume will decrease as the At this time, an LED (light emitting diode) lamp 4 connected between the terminals of the relay 1 lights up to notify that the relay 1 is in the on state. In this state, the sleeve timer (
(Although not shown in the drawing, it may be built into the radio or separately connected to the outside) so that the power switch can be turned off after 3 pm, and the next morning at 7 pm.
If the power switch was set so that it would turn on at the same time, the movable piece 1a of the first switch would ring at a low volume three times before and after going to bed, then turn off and the relay 1 would be de-energized and in the first state. switches from contact b to contact a to enter the second state, and the movable contact 1b of the second switch returns from contact d to contact c, and the next morning when you wake up at 7 a.m., the power switch is turned on by the time switch. When it is turned on, relay 1 is off, so the radio will play at a high volume.

The amount of attenuation of the signal from the terminal 5 to the amplifier 2 can be freely selected by changing the ratio of the resistors Rl, R2, as described above. Figure 2a
The amount of attenuation can be freely adjusted by connecting a volume R1 and a resistor R3 to the contact a of the relay 1 as shown in FIG. 2, or a volume VR2 between the contacts A and b as shown in FIG. 2b. In this way, according to the present invention, even if you enjoy a radio program at a low volume at bedtime and fall asleep, the next morning the radio will play at a high volume even though you have not touched the radio volume, which is extremely convenient in practice.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the automatic volume adjustment device according to the present invention, and FIGS. 2A and 2B are diagrams showing a part of the device that can adjust the difference in volume between sleeping and waking up. It is a figure showing an example. In the figure, 1: relay, 2: amplifier, 3: non-lock switch, 5: radio reception signal input terminal, 7, 8: power supply input terminal.

Claims (1)

[Claims] 1 The relay operates to change the amount of attenuation of the received signal and supply it to the amplifier, and emit the sound from the speaker at a different volume.The above relay is a relay whose energization is controlled based on the on/off status of the power switch by the sleep timer. The relay coil is switched between the first and second states by the operation of the relay coil depending on whether the relay coil is energized or not, and in conjunction with the associated resistor, switches the amount of attenuation of the received signal to the amplifier. a first switch, and a second switch that forms a self-holding circuit of the relay coil by operating the relay coil by energizing the relay coil, and a second switch is provided between the relay coil and the sleep timer. A non-locking switch is inserted and provided, and the relay coil sets the first switch to the first state when not energized to supply the received signal to the amplifier with a low attenuation amount, and the power is supplied by the sleep timer. When energized based on the non-locking switch being turned on when the switch is turned on, the second switch is turned on and becomes a self-holding state, and the first switch is switched to a second state and the first state is changed from the first state. An automatic volume adjustment device characterized in that a received signal is supplied to the amplifier with a high attenuation amount.