JPH10326396A - Security interphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to use door phone sub-master equipment is an auxiliary sound device. SOLUTION: This device is equipped with a door phone master equipment 1, which has a security sensor S connected and is installed in a living room, the door phone sub-master equipment 2, which is connected to the door phone master equipment 1 and stalled in another room, and a door phone slave equipment 3, which is installed at an entrance so that it can communicate with the door phone master equipment and door phone sub-master equipment, and the door phone master equipment 1 generates a calling sound indicating the reception of a call signal from at least the door phone slave equipment 3 and an alarm sound indicating the reception of an alarm signal from a security sensor and sends it out to the door phone sub-master equipment 2 and the door phone sub-master equipment 2 sounds at least the calling tone and alarm tone by a sound part 12 having a sound volume control circuit 2b. In this case, the door phone master equipment is equipped with an alarm sound indicating means 1g, which informs the door phone sub-master equipment that the signal is the alarm sound and the door phone sub-master equipment is equipped with a sound volume suppression releasing means 2C, which releases sound volume from being suppressed by a sound volume suppressing circuit at the time of informing that the signal is the alarm sound and sounds the sound part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security intercom apparatus for sounding an alarm sound from an intercom doorphone.

[0002]

2. Description of the Related Art A visitor who has come to a front door presses a call button of a door phone handset, sounds a ringing sound from a door phone main unit installed in a living room or the like, calls a resident, and calls a resident in the house. Intercom devices capable of talking are installed in most houses. In addition, recently, not only do not notify visitors and make calls between the intercom slave unit installed at the entrance and the intercom master unit installed in the living room, but also install the intercom main unit in the bedroom or kitchen. Convenient intercom devices that can be connected to machines and added to them to respond to visitors from anywhere have become widespread.

Further, when a fire sensor, a gas leak sensor, an emergency push button, or the like is connected to the door phone master unit and, for example, the fire sensor detects a fire and outputs an alarm signal to the door phone master unit, the door phone master unit itself issues an alarm. In addition to sounding the sound, a safety alarm is sent out to the doorphone handset at the entrance and to the intercom main unit added to each room, and safety measures are taken to sound the alarm sound from the intercom unit and the intercom main unit. planned,
What is called a security intercom device has also become widespread.

As the above-described intercom apparatus or security intercom apparatus, not only a single-family house but also a multi-family house in which a lobby intercom apparatus is installed at a common entrance or the like has become widespread.

[0005]

By the way, the intercom secondary master unit of the above security intercom apparatus has a volume operation unit for adjusting a ringing sound and a volume for a call by a visitor. However, when the volume of the ringing tone and the volume of the call are suppressed by operating the volume operation section of the intercom secondary unit, the volume of the alarm sound is also suppressed, and the volume of the alarm sound (70 dB or more) according to the regulation is reduced. Since it is no longer possible to secure them, the intercom main unit is not recognized as an auxiliary sound device under the law, and there is a problem that an extra sound device must be provided separately.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. It is an object of the present invention to use an auxiliary intercom unit for an intercom as a legal auxiliary audio device. An object of the present invention is to provide an excellent security intercom device that can eliminate the irrationality of having to provide a security intercom.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a door phone master unit connected to a security sensor and installed in a living room, and a door phone master unit. A door phone secondary master unit connected to the main unit and installed in another room; and a door phone slave unit installed at the front door so as to communicate with the door phone master unit and the door phone secondary master unit, wherein the door phone master unit includes at least a door phone. A ringing sound indicating that a calling signal has been received from the slave unit and an alarm sound indicating that an alarm signal has been received from the security sensor are generated and sent to the intercom secondary master unit. In the security intercom apparatus, at least a ringing sound and an alarm sound are sounded from an audio unit having a volume suppression circuit, the intercom master unit notifies the intercom main unit of the alarm sound. Including an alarm sound notifying means, the doorphone sub master unit is characterized by having a volume derepression means for sounding the sound portion to release the volume suppression volume suppression circuit receives the notice indicating that the alarm sound.

In the invention according to claim 2, the alarm sound notifying means includes a DC superimposing circuit for superimposing a DC component for distinguishing the alarm sound, and the volume suppression canceling means includes the superimposed sound canceling means. An alarm sound discriminating circuit for discriminating whether or not the sound is an alarm sound from a DC component, and a volume suppression canceling circuit for canceling the volume suppression of the volume suppressing circuit by a signal from the alarm sound discriminating circuit. .

According to a third aspect of the present invention, the sound volume suppression circuit is a resistor, and the sound volume suppression canceling means is a short-circuit switch for short-circuiting the resistor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a security intercom apparatus according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a circuit diagram illustrating a main part of the security intercom device. FIG. 2 is a signal waveform diagram showing a difference between an alarm sound and a notification sound sent from the door phone master unit to the door phone auxiliary master unit. FIG. 2A shows an alarm sound signal, and FIG. The signal is shown. FIG. 3 is a system connection diagram showing an outline of the security intercom apparatus.

As shown in FIG. 3, for example, the security intercom apparatus includes a door phone master unit 1, a door phone sub master unit 2, a door phone slave unit 3, an alarm monitor 4, and a lobby interphone 5. The door phone master unit 1 is a part that performs a central function of the security intercom device, and is installed, for example, in a living room A of a dwelling unit. Door phone master unit 1
A handset 10 for telephone calls, a volume operation unit 11 for adjusting the volume of a ringing tone or the volume of a telephone call, an audio unit 12 including a speaker, etc., and an indoor call button 13 for calling between rooms. Alarm display section 14 for displaying the alarm type
And In addition, the door phone master unit 1 has a fire sensor S ₁ and a gas leak sensor S corresponding to security sensors.
_2, very pushbutton S _3, crime prevention switch S ₄ is connected.

The intercom main unit 2 is installed in the bedroom B or the kitchen C and is connected to the intercom main unit 1. Door phone secondary master unit 2
Is a handset 20 for a call, a volume operation unit 21 for adjusting the volume of a ringing tone or the volume of a calling tone, an audio unit 22 including a speaker and the like, and an indoor call button 23 for calling between rooms. Is provided. The doorphone slave unit 3 is installed at the entrance of a dwelling unit, and includes a communication unit 30 including a microphone and a speaker for a call, and a call button 31 operated by a visitor to call a resident.

The alarm monitoring panel 4 is installed in the manager's office D of a condominium, and has a handset 40 for telephone calls.
And an operation key unit 41 for inputting a dwelling unit number when the manager calls each dwelling unit, and a message display unit 42 for displaying various messages such as the dwelling unit number and disaster prevention and crime prevention information input by the manager. The lobby intercom 5 is installed at the common entrance E, and includes a communication unit 50 having a microphone and a speaker for a call, and an operation key unit for inputting a dwelling unit number when a visitor visiting the common entrance calls a resident. 51, and an input dwelling unit number display section 52 for displaying a dwelling unit number or the like input by a visitor.

Next, the configuration of the door phone master unit 1 and the door phone sub master unit 2, which are the main parts of the invention of the security intercom apparatus, will be described in detail with reference to FIG. Indoor apparatus 1, the fire sensor S ₁ and a gas leak sensor S _2, very pushbutton S _3, the sensor terminals T for connecting the crime prevention switch S ₄
Comprising _1, a slave unit terminal T ₂ to connect the intercom slave unit 3, and a sub base unit terminals T _31, T ₃₂ connecting the doorphone sub base unit 2. The intercom master unit 1 includes a sensor alert detection circuit 1a, a call detection circuit 1b, a control processing unit 1c including a microprocessor for controlling the whole, and various sounds such as a ringing sound and an alarm sound. A sound signal synthesis circuit 1d for generating a signal, an amplifier 1e for amplifying an output of the sound signal synthesis circuit 1d and superimposing a DC component, a capacitor 1f for cutting off a DC component included in an output of the amplifier 1e, and a control processing unit An analog switch 1g corresponding to an alarm sound notifying unit that short-circuits both ends of the capacitor 1f based on an instruction from 1c and bypasses a DC component, and a current limiting resistor 1h. The control processing unit 1c controls the analog switch 1g only when the alarm signal is transmitted from the acoustic signal synthesis circuit 1d.
Is turned on (short circuit).

The intercom main unit 2 is connected to main terminals T ₄₁ and T ₃₂ for connection to the sub main terminals T ₃₁ and T ₃₂ of the intercom main unit 1.
_{It has 42} . Further, the doorphone sub master station 2, therein to adjust the capacitor 2a for blocking a direct current component included in the output from the sub-base unit terminal T ₃₁ of the indoor unit 1, the ringer volume and call sound A variable resistor 2b corresponding to a volume suppression circuit; a volume suppression release unit 2c for releasing volume suppression upon receiving a notification of an alarm sound from the door phone master unit 1; And Volume inhibition release means 2c, for example, a warning sound discriminating circuit 2c ₁ for determining the presence or absence of a direct current component included in the output from the sub-base unit terminal T ₃₁ of the indoor unit 1, an instruction from the alarm sound discriminating circuit 2c ₁ by short-circuiting both ends of the variable resistor 2b configured to include an analog switch 2c ₂ corresponding to the volume inhibition release circuit which releases the volume suppression based on. Incidentally, the alarm sound discriminating circuit 2c ₁ includes, for example, a transistor Q _1, Q _2. Further, the resistance value of the variable resistor 2b can be changed by sliding the volume operation unit 21 right and left.

Next, the connection relationship inside the door phone master unit 1 will be described. Input of the sensor onset paper detecting circuit 1a is connected to the sensor terminal T _1, the output of the sensor onset paper detecting circuit 1a is connected to an input port of the control unit 1c. Call detection circuit 1
input of b is connected to the slave unit terminal T _2, the calling detection circuit 1b
Is connected to the input port of the control processing unit 1c. The output port of the control processing section 1c is connected to the control input section of the audio signal synthesis circuit 1d and the control input section of the analog switch 1g. The output of the audio signal synthesis circuit 1d is connected to the input of the amplifier 1e. The output of the amplifier 1e is a capacitor 1
f and one end of the analog switch 1g, and the other end of the capacitor 1f and the other end of the analog switch 1g are respectively connected to the sub master terminal T ₃₁ via the current limiting resistor 1h.
Connect to The sub base unit terminal T ₃₂ is connected to ground.

Next, a description will be given of the connection relationship inside the door phone sub master unit 2. Base unit terminal T ₄₁ is connected to one end of the base and the capacitor 2a of the transistor Q _2. The emitter of the transistor Q ₂ is connected to ground, the collector of the transistor Q ₂ is connected to the base of the transistor Q _1. The emitter of the transistor Q ₁ is connected to the DC power supply V _cc, the collector of the transistor Q ₁ is connected to the control input of the analog switch 2c _2. The other end of the capacitor 2a is connected to one end with one end of the analog switch 2c ₂ of the variable resistor 2b. The other end of the variable resistor 2b and the analog switch 2c
The other end of ₂ is connected to one end of the input section of the acoustic section 12 respectively. Further, the master unit terminal T ₄₂ is connected to the other input of the acoustic unit 12. The intercom master unit 1 and the intercom master unit 2 are connected via a cable L.

The security intercom apparatus configured as described above operates as follows. That is, when the call detection circuit 1b receives a call signal from the door phone handset 3, the door phone master unit 1 outputs a signal indicating that the call signal has been received to the control processing unit 1c. The control processing unit 1c causes the sound signal synthesizing circuit 1d to output a ringing tone (for example, “ping-pong”) signal to the amplifier 1e. The amplifier 1e amplifies the ringing tone signal output from the acoustic signal synthesizing circuit 1d, and superimposes the DC component Va as shown in FIG. However, the analog switch 1g is off. Thus, the output from the amplifier 1e becomes to be output from the sub-base unit terminal T ₃₁ via a series connection circuit of the capacitor 1f and the current limiting resistor 1h to doorphone sub base unit 2, the DC at capacitor 1f component A ringing signal as shown in FIG. 2B from which Va has been removed is output from the sub-master terminal T _{31 of the} intercom master 1 to the intercom sub-master 2.

The intercom secondary master unit 2 outputs a ringing tone signal as shown in FIG.
Even if received at _41, the transistors Q _{1 and} Q ₂ constituting the alarm sound discriminating circuit 2c ₁ remain off, and the on (short circuit) instruction signal from the alarm sound discriminating circuit 2c ₁ to the analog switch 2c ₂ is No output. Accordingly, the ringing signal as shown in FIG. 2B from which the DC component Va has been removed is input to the acoustic unit 12 via the series connection circuit of the capacitor 2a and the variable resistor 2b. That is,
The ringing tone signal attenuated (suppressed) to a moderate volume by the variable resistor 2b is input to the audio unit 12, and a ringing tone with a moderate volume is output from the acoustic unit 12.

By the way, the indoor apparatus 1, the output from the fire sensor S ₁ for example by the sensor onset paper detecting circuit 1a receives a fire alert signal, a signal indicating that receiving the fire alarm signal to the control processor 1c I do. The control processing unit 1c outputs an ON (short-circuit) control signal to the analog switch 1g, and outputs an alarm sound (for example, “pi-po, pe-po,...”) To the amplifier 1e to the acoustic signal synthesizing circuit 1d.
The amplifier 1e amplifies the alarm sound signal output from the acoustic signal synthesis circuit 1d, and superimposes a DC component Va as shown in FIG. In this case, the analog switch 1g is on. Therefore, amplifier 1
The output from the e becomes to be output from the sub-base unit terminal T ₃₁ via only current limiting resistor 1h Bypass capacitor 1f to doorphone sub base unit 2, FIG. 2 including a direct-current component Va (a) It becomes audible alarm signal as shown in, and output from the sub-base unit terminal T ₃₁ of the indoor unit 1 to the doorphone sub base unit 2.

[0021] In this case, doorphone sub master station 2, it means that receive the alarm sound signal as shown in FIG. 2 (a) containing a DC component Va to base unit terminal T _41, alarm sound discriminating circuit 2c ₁
Each transistor Q _1, Q ₂ constituting will be turned on, to the analog switch 2c ₂ is turned on (short) instruction signal is outputted from the alarm sound discriminating circuit 2c _1. Therefore, the alarm sound signal as shown in FIG. 2 (a) obtained by superimposing a DC component Va will be input to the sound unit 12 via the analog switch 2c ₂ that capacitor 2a and one (short). That is, an alarm sound signal without attenuated (suppressed) of the volume by the variable resistor 2b is input to the sound unit 12, and the sound unit 12 outputs a loud alarm sound regardless of the variable resistor 2b. Is output.

Therefore, in the security intercom apparatus having the door phone master unit 1 and the door phone sub master unit 2 as described above, the volume of the ringing sound and the volume of the call sound are controlled by the volume operation unit 21 of the door phone sub master unit 2. Even if it is adjusted so as to suppress the alarm sound, the sound unit 12 sounds at a predetermined high volume regardless of the operation of the volume operation unit 21, so that the intercom auxiliary unit can be used as a legal auxiliary. It is possible to provide an excellent security intercom device that can be used as an audio device and can solve the irrationality of having to separately provide an additional audio device.

Although the security intercom apparatus according to the above-described embodiment has been described as being for a so-called collective house, it may be for a single-family house. Further, the alarm sound notifying means is performed by superimposing a DC component, but may be performed by superimposing a specific high-frequency signal out of the audible range. Needless to say, this is a circuit for determining the presence or absence.

[0024]

According to the first aspect of the present invention, the intercom master unit is provided with an alarm sound notifying means for notifying the intercom main unit of the alarm sound, and the intercom main unit is provided with the alarm sound. When the notification is received, there is provided a volume suppression canceling unit that cancels the volume suppression of the volume suppression circuit and sounds the sound unit. Therefore, even if the ringing tone or the like is suppressed to an appropriate volume, an alarm that sounds from the intercom secondary master unit. The sound can be sounded at a large volume regardless of the volume suppression circuit, and it is possible to use the intercom auxiliary unit as a legal auxiliary sound device, and it is necessary to provide an additional sound device separately. It is possible to provide an excellent security intercom device that can be eliminated.

According to the second aspect of the present invention, the alarm sound notifying means includes a DC superimposing circuit for superimposing a DC component for distinguishing the alarm sound, and the sound volume suppression canceling means includes a superimposed DC component. 2. An alarm sound discriminating circuit for discriminating whether or not the sound is an alarm sound, and a volume suppression canceling circuit for canceling the volume suppression of the volume suppressing circuit by a signal from the alarm sound discriminating circuit. It is possible to provide an excellent security intercom device which can be applied to the two-wire type and can be realized with a relatively simple configuration.

According to the third aspect of the present invention, the volume control circuit is constituted by a resistor, and the volume suppression canceling means is constituted by a short-circuit switch for short-circuiting the resistor. Further, it is possible to provide an excellent security intercom device which can be realized at a low cost.

[Brief description of the drawings]

FIG. 1 is a circuit diagram illustrating a main part of a security intercom apparatus according to an embodiment of the present invention.

FIG. 2 is a signal waveform diagram showing a difference between an alarm sound and a ringing tone output from a door phone master unit of the security intercom apparatus to a door phone auxiliary master unit.

FIG. 3 is a system connection diagram showing an outline of the security intercom device.

[Explanation of symbols]

1 indoor apparatus 1g alarm sound notifying means (DC superposition circuit) 2 doorphone sub master unit 2b volume suppression circuit 2c volume derepression means 2c ₁ alarm sound discriminating circuit 2c ₂ volume inhibition release circuit (short-circuit switch) 3 intercom slave unit S _n Security sensor Va DC component

Claims (3)

[Claims] A door phone master unit connected to a security sensor and installed in a living room, an intercom master unit connected to the intercom master unit and installed in another room, and a door phone master unit and an intercom master unit. A door phone handset to be installed at the front door so that a call can be made, wherein the door phone master unit has at least a ringing sound indicating that a calling signal has been received from the door phone handset and an alarm sound indicating that an alarm signal has been received from the security sensor. Is generated and transmitted to the intercom secondary master unit, wherein the intercom secondary master unit sounds at least a ringing sound and an alarm sound from an audio unit having a volume suppression circuit. The intercom master unit includes an alarm sound notifying unit for notifying the intercom main unit of the alarm sound, and the intercom master unit receives a notification of the alarm sound to suppress the volume. A security intercom apparatus comprising a volume suppression canceling means for canceling the volume suppression of a circuit and sounding an acoustic section. 2. The alarm sound notifying means includes a DC superimposing circuit for superimposing a DC component to distinguish an alarm sound,
The volume suppression canceling means includes an alarm sound discriminating circuit for discriminating whether or not the sound is an alarm sound from the superimposed DC component, and a volume suppression canceling circuit for canceling the volume suppression of the volume suppressing circuit by a signal from the alarm sound discriminating circuit. The security intercom apparatus according to claim 1, comprising: 3. The security intercom apparatus according to claim 2, wherein said sound volume suppression circuit is a resistor, and said sound volume suppression canceling means is a short-circuit switch for short-circuiting said resistor.