JPS6398255A - Interphone equipment for house information panel - Google Patents

Abstract

PURPOSE:To attain speech with an optimum sound volume with an interphones of different type by providing an input level adjusting means to adjust the amplification degree of an amplifier circuit for input and an output level adjusting means to adjust the amplification degree of an amplifier circuit for output. CONSTITUTION:The different type of interphone 7 is connected with the interphone equipment of a house information panel. In case, for instance, a speech is hard to hear on the interphone equipment side, the amplification degree is upgraded by increasing the resistance value of a variable resistor VR 2 in order to adjust the volume of a voice from the speaker to be optimum. Meanwhile, a speech from the house information panel is hard to hear on the external interphone 7 side, the resistance value of a variable resistor VR 1 is increased to lift the output level of a voice signal so that the voice volume on the external interphone 7 side is adjusted to be optimum. In such a way, since both output level and the input of a voice can be adjusted, the informing of an emergency from the house information panel to the external interphone can be exactly executed, as well as the voice volume can be adjusted for a user on the opposite side who has difficulty in hearing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an intercom device for a housing information panel installed in a housing information panel for disaster prevention and crime prevention for making calls and notifications.

[? -rscape technology] The housing information panel connects with heat detectors, smoke detectors, bus leak detectors, crime prevention sensors, etc. to perform disaster prevention and crime prevention management in the house, and also connects to intercoms installed elsewhere such as door phones. This is for normal phone calls and announcements.

By the way, when a conventional intercom device of a housing information board is used to make a call or make an announcement, if a different type of intercom is connected to the intercom device, various problems occur in the call due to differences in the output levels of audio signals. That is, since the output audio level of the intercom device is constant,
The voice of the other party is too low to be heard, or the other party's voice is abnormally loud, making it difficult to communicate optimally. Furthermore, people who have difficulty hearing at normal audio levels may not be able to hear the other party's call at all.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide an intercom device for a housing information board that allows calls to be made at optimal volume even with different types of intercoms. .

[Disclosure of the Invention] The intercom device for a housing information board of the present invention is installed in a housing information board for disaster prevention and crime prevention of a home, and has an input device for making calls with other communication devices. In an intercom device equipped with an amplifier circuit, an output amplifier circuit, and a handset, an input level adjustment means for adjusting the amplification degree of the input amplifier circuit, and an output 1 for adjusting the amplification degree of the output amplifier circuit.
Since it is equipped with a novelty adjustment means, it is possible to talk at the optimum volume even when connected to a different (heavy-duty) intercom.

The real-side housing information board 1 is connected to a doorbell, heat detector, smoke detector, gas leak detector, security sensor, etc., and performs disaster prevention and crime prevention management inside the house, and can also be installed in other places such as a doorbell. This is used to perform normal calls and notifications between the external intercom 4 and the external intercom 4.

As shown in FIG. 1, a predetermined circuit is housed in the casing 4, and a push button 2 for emergency notification is provided on the front, and a handset 3 for making calls is connected to the circuit of the intercom device in the casing 4 through a cord 5. Intercom devices include doorbells installed at predetermined locations inside and outside the house, residential information panels, and other devices whose communication circuits do not have specifications that match the intercom device in advance. It is connected to an external intercom 7.

As shown in FIG. 1, the intercom device of this embodiment has the following features:
A matching transformer MT for in-begence matching of audio signals input and output between a handset 3 equipped with a speaker Sp and a microphone M for calling, and an external intercom 7; An input amplifier circuit Ain for amplifying an input signal received from the outside and outputting it to the speaker Sp of the handset 3, and amplifying the output of the microphone M of the handset 3 and outputting it to the outside via a matching transformer MT. and an output amplifier circuit Aout.

In the matching transformer MT, one end of the negative side coil L1 inputs the audio signal from the external intercom 7 via the DC cutoff capacitor C1, and the other end is maintained at a predetermined voltage. An external audio signal is voltage-shifted to a predetermined reference voltage via a tap T of the primary coil L1, and then input to the amplifier circuit Ain. In addition, the secondary coil L of the matching transformer MT
One end of 2 is grounded, and the output of the amplifier circuit Aout is inputted to the other end via a capacitor C2, and the output of the amplifier circuit AouL is connected to the secondary side filter L2 of the matching transformer MT and - The voltage is applied to a predetermined reference voltage of the external intercom 7 via the next-side coil L1, and is output via the DC cutoff capacitor C1. Further, the amplifier circuit Ain performs amplification using an operational amplifier OP2, and the degree of amplification can be adjusted by changing the resistance value ratio of the resistor R1 and a variable resistor VR2 serving as an input level adjusting means by changing the resistance value of the variable resistor VR2. It has become. In addition, in this embodiment, the amplifier circuit Aout has a similar circuit configuration using amplification by the operational amplifier OP1, and the resistance value ratio between the resistor R3 and the variable resistor VRI as an output level adjustment means is adjusted to the value of the variable resistor VRI. The l increase rate can be adjusted by changing the resistance value. Here, capacitors C6, C5
are for noise prevention of operational amplifiers OPI and OP2, respectively.

In addition, the amplifier circuit Ain and the speaker S of the handset 3
The p1 amplifier circuit Aout and the microphone M of the handset 3 are connected via DC cutoff capacitors C3 and C4, respectively. Here, as mentioned above, both the input and output of the audio signal of the intercom device are connected to the external intercom 7 via the DC cutoff capacitor C1,
Since audio signals are exchanged via the capacitor C1 in this manner, connection with an external intercom 7 of a different type can be easily made. As shown in FIG. 2, the variable resistors V R3 and V R2 can be easily varied in resistance value by, for example, twisting knobs B 1 and B 2 provided on the surface of the casing 4, respectively. It looks like this.

In this way, the audio signal input from the external intercom 7 is amplified by the amplifier circuit VR2 and then outputted through the speaker sp, and the speaker's voice is converted into an electrical signal by the microphone M, which is amplified by the amplifier circuit VRI. It is output as an audio signal to the external intercom 7 side.

The operation of this embodiment will be explained below. When the external intercom 7 of different types and the intercom device of the housing information board are connected as shown in Figure M3, and the volume of the call between the external intercom 7 and the intercom device is not normal, the person on the housing information board 1 , by operating knobs B1 and B2 of variable resistor VR1 and variable resistor VR2 so that the voice volume is adjusted to a normal level. That is, if it is difficult to hear on the intercom device side, the resistance value of the variable resistor VR2 is increased to increase the degree of amplification, and the volume of sound from the speaker is adjusted to be optimal. In addition, if the sound from the housing information board is difficult to hear on the external intercom 7 side, use the variable resistor VRI.
By increasing the resistance value of the external intercom 7 and increasing the output level of the audio signal, the audio volume on the external intercom 7 side is adjusted to be optimal. On the other hand, if the audio volume is too loud,
If it is large on the housing information panel 1 side, reduce the resistance value of the variable resistor VR2 to reduce the amplification degree, and if it is large on the external intercom 7 side, reduce the resistance value of the variable resistor VRI to reduce the amplification degree. All you have to do is operate the board's insects BL and B2. As described above, since the intercom device for the housing information panel of the present invention can adjust both the audio output level and the input level, it is possible to reliably send abnormality notifications from the housing information panel to the external intercom, and to make it possible for the other party to hear the audio. For listening (you can adjust the volume of the voice for people who don't want to hear it,
Even if it is connected to an existing external intercom 7 of a different type, the housing information board can be added, and the configuration allows the optimal adjustment of the volume of audio between communication equipment and communication equipment.

[Effects of the Invention] The intercom device for a housing information FA board of the present invention is installed in a housing information board for disaster prevention and crime prevention in a home, and is an input amplification device for making calls with other telephone VI devices. In an intercom device including a circuit, an output amplifier circuit, and a handset, input level adjustment means adjusts the amplification degree of the input amplifier circuit, and output level adjustment means adjusts the amplification degree of the output amplifier circuit. Since the level of amplification of the voice is variable, the voice input level and output level can be adjusted to adjust the volume of the call sound (PF), allowing calls to be made at the optimal volume even with different types of intercoms. It is effective.

[Brief explanation of the drawing]

Fig. 1 is a circuit block diagram of an intercom device for a housing information board according to an embodiment of the present invention, Fig. 2 is a front view showing the same housing information board as above, and Fig. 3 is a front view showing connection with an external intercom as above. , 1 is the housing information board, 3 is the handset,
Reference numeral 6 indicates an external intercom as a communication device, Ain is an input amplifier circuit, Aout is an output amplifier circuit, VRI is a variable resistor as an output level adjusting means, and VRI is a variable resistor as an input level adjusting means.

Claims (1)

[Claims] (1) An intercom device equipped with an input amplifier circuit, an output amplifier circuit, and a handset installed in a housing information panel for disaster prevention and crime prevention in a house and used to communicate with other communication devices. Housing information characterized in that it is provided with input level adjustment means for adjusting the amplification degree of the input amplifier circuit and output level adjustment means for adjusting the amplification degree of the output amplifier circuit. Panel intercom device.