JPH02134029A - Sound volume adjusting device - Google Patents

Abstract

PURPOSE:To adjust the output level of a broadcast given aperiodically at any time as required by interrupting a bypass circuit subjected to control by a control means when the operation of the sound volume setting mode is entered from the mode setting switch and operating a setting variable resistor. CONSTITUTION:When the mode switch 14 is entered to set the sound volume level of traffic information or emergency broadcast, a controller 15 outputs the control signal 16 of the sound volume setting mode to a detection section 11 corresponding thereto and also outputs a radio sound selection signal 17 to a signal selector 6 to switch the mode to the radio signal selection mode. Then a switch 12 is turned off, a bypass circuit 13 is interrupted and a setting variable resistor 10 is connected to a main variable resistor 7, then the setting variable resistor 10 has only to be adjusted in this state. Thus, the sound volume in the case of receiving a broadcast given aperiodically such as traffic information or emergent broadcast is simply adjusted at any time.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a volume adjustment device.

<Conventional technology and its problems> In recent years, traffic information and emergency broadcast announcements have been made.
Many in-vehicle car radios and car audio devices are configured to be able to receive these discontinuous broadcasts.

When receiving these traffic information and emergency broadcasts, if the output level is below a predetermined output level, the output is increased to a predetermined output level. When a source other than radio, such as a tape or CD, is selected, switch the source to radio. When audio is muted, operations such as canceling the mute and outputting a predetermined output level are performed, and traffic information and emergency broadcasts are output at a predetermined level. is normal.

However, in recent years, devices have appeared that are configured to allow users to freely set predetermined output levels for such traffic information and emergency broadcasts.

However, the output level must be adjusted while actually receiving traffic information and emergency broadcasts, and it is not known when traffic information will be broadcast, and emergency broadcasts are rarely broadcast. This has the drawback that it is difficult for the user to actually adjust the output level, such as the need to use a signal generator for broadcast generation.

<Summary of the Invention> The present invention has been made to improve the above-mentioned conventional drawbacks, and is a sound electronic device that can adjust the output level of discontinuous broadcasts such as traffic information and emergency broadcasts whenever necessary. The object is to provide an adjustment device. To this end, the present invention provides a first volume control means that adjusts the volume when receiving normal radio broadcasts, and a first volume control means that adjusts the volume when receiving broadcasts broadcast discontinuously such as traffic information and emergency broadcasts. a bypass circuit that bypasses the second sound 'kk adjustment means and the second volume adjustment means; the bypass circuit is connected during normal radio broadcast reception, and the bypass circuit is connected when receiving 4S of discontinuous broadcasting; a mode setting switch for selecting a volume setting mode; and a mode setting switch for selecting a volume setting mode, and sending (i'!") to the bypass circuit intermittent means in response to the operation of the mode setting switch to turn off the bypass circuit. The basic feature is that it has a control means for turning off the power.

Function> The first volume adjustment means adjusts the sound of normal broadcast reception, and the second volume adjustment means adjusts the sound of discontinuous broadcast reception.
Adjust accordingly. The second volume adjustment means is a normal broadcast receiver (,
At 1 o'clock, it is bypassed by the bypass circuit. The bypass circuit is provided with circuit disconnection means, and when the volume setting mode is operated from the mode setting switch, the bypass circuit is disconnected under the control of the control means.
Activate the second volume adjustment means.

<Example> An embodiment of the present invention will be described below based on the present invention.

In FIG. 1, the car radio section includes an antenna 1 for broadcasting 24, 4, a front end/intermediate frequency amplification section 2, and an MPXt
It has a JI tuning section 3, a tape reproducing head 4, and a preamplifier 5 for amplifying the tape signal.

The outputs of the MPXfji tuning section 3 and the preamplifier 5 are manually input to a signal selection device 6 for selecting a radio signal or a tape signal, and are selected here. This signal selection device 6 is configured to select between a radio signal and a tape signal based on an operation signal from an operation section (not shown) and a selection signal 17 from a control device 15, which will be described later. The output from the signal selection device 6 is sent to a low frequency amplifier 8 via a main volume 7 for varying the volume level, and is configured to be converted into audio by a speaker 9 and output.

A setting volume 10 is connected in series to the main volume 7 for setting the output level when receiving traffic information or emergency broadcasts.
is provided. This setting volume 10 is a semi-fixed volume.

A bypass circuit 13 is formed in parallel with this setting volume 10, and a switch 12 is interposed in the middle of this bypass circuit 13. In this embodiment, the switch 12 is an NPN transistor, and the detection section 11 is connected to the base side of the switch 12 via a base resistor. When the detection unit 11 receives the output from the front end/middle 1111 frequency amplification unit 2 and receives traffic information or emergency information, the detection unit 11 sets the output to L, turns off the switch 12, and turns off the bypass circuit 1:3. is configured to do so. Conversely, during normal broadcast reception 64, the output is set to 11, the switch 12 is turned on, the bypass circuit 13 is connected, and the setting volume 10 is bypassed.

In addition to the signal from the front end/intermediate frequency amplification section 2, the detection section 11 is configured to output its output as ■ by controlling the juice amount setting mode control number 16 from the control device i\15. . A mode switch 14 is connected to the control device 15 for selecting the fIr amount setting mode y4 when receiving traffic information or emergency broadcasts.

By operating this motor switch 14, the control device 15 outputs a control signal >'f16 to the detection section 11, and at the same time selects a radio signal to the signal selection device 6 (a, e).
17.

Next, the operation will be explained.

Normal broadcast reception (at 1 o'clock, the signal is received by antenna 1, detected through front end/intermediate frequency amplification section 2, separated into stereo by MPX demodulation section 3, and manually input to signal selection bag [6].
Audio is output from a speaker 9 via a main volume 7 and a low frequency amplifier 8. At this time, since the detection unit 11 is not receiving traffic information or emergency broadcasting, it outputs an H signal.

Switch 12 is on, setting volume 1
0 is bypassed by the bypass circuit 13. In this state, the main volume 7 adjusts the volume fA.

If you receive an Atn+11 or emergency broadcast,
The output of the detection section 11 becomes L, the switch 12 is turned off, and the bypass circuit 13 is turned off. the result.

The setting volume 10 is connected in series to the main volume 7, and even if the main volume 7 is turned down, if there is residual resistance in the setting volume 1o, an output corresponding to the resistance ratio between the main volume 7 and the setting volume 10 will be generated. is obtained, and the speaker 9 outputs audio at a predetermined volume according to the setting of the revision volume 10.

Next, when the mode switch 14, which sets the volume level of traffic information and emergency broadcasts, is operated, the control device 15
In response to this, outputs a control signal 16 for volume setting mode to the detection section 11. At the same time, a radio audio selection signal 17 is output to the signal selection device 6, and the switch is made to radio shinbee selection 6
The detection unit 11 inverts its output to L based on the control signal 16, which turns off the switch 12 and turns off the bypass circuit 1.
3 is in a disconnected state. Then, it is connected to the setting volume 10 or the main volume 7. In this situation, if the revision volume 10 is adjusted, the output level when receiving traffic information or emergency broadcasts can be adjusted while actually listening to the audio output.

Note that it is also possible to use a mechanical lock switch as the mode switch 14 described above, and to configure the output side of the detection section 11 to be directly drawn to the negative side. In this case, the control device 15 is not connected to the detection section 11 and outputs only the selection signal 17, or the control device 15 is not provided and the signal selection bag [6 is switched by operation from the operation section. It's okay.

With the above configuration, the output of traffic information and emergency broadcasts can be maintained at a predetermined level, and the predetermined level can be easily adjusted at any time without using a special signal generator. Become.

<Effects of the Invention> As explained above, the volume adjustment device of the present invention includes a first volume adjustment means for adjusting the volume when receiving normal radio broadcasts, and a first volume adjustment means for adjusting the volume when receiving normal radio broadcasts, and a first volume adjustment means for adjusting the volume when receiving normal radio broadcasts, and a first volume adjustment means for adjusting the volume when receiving normal radio broadcasts. A second f+ amount adjustment means for adjusting the volume during reception, a bypass circuit for bypassing the second volume adjustment means, and the bypass circuit is connected during normal radio broadcast reception, and the broadcast is played discontinuously. a mode setting switch for selecting a volume setting mode; a mode setting switch for selecting a volume setting mode; and a mode setting switch for sending a signal to the bypass circuit intermittent means in response to the operation of the mode setting switch. Since it has a control means for turning off the nf, it is possible to easily adjust the volume of broadcasts that are broadcast discontinuously such as traffic information and emergency broadcasts (S time) at any time.
It has the effect of making you more capable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1: Antenna, 2 Front end/medium frequency amplification section, 3
: MPX demodulator, 4: Tape playback head, 5: Preamplifier, 6: Signal selection device, 7: Main volume, 8:
Low frequency amplifier, 9; speaker, 10: setting volume, 11: detection section, 12: switch, 13: bypass circuit, 14: mode switch, 15: control device, 16: control signal, 17: selection signal.

Claims (1)

[Scope of Claims] A first volume adjustment means for adjusting the volume when receiving normal radio broadcasts, and a second volume adjustment means for adjusting the volume when receiving broadcasts broadcast discontinuously such as traffic information and emergency broadcasts. a bypass circuit that bypasses the second volume control means, and a bypass circuit that connects the bypass circuit when receiving normal radio broadcasts and disconnects the bypass circuit when receiving discontinuous broadcasts. A mode setting switch for selecting a volume setting mode; and a control means for sending a signal to the bypass circuit intermittent means to turn off the bypass circuit in response to the operation of the mode setting switch. Features a volume adjustment device.