JP2002171351A - Intercom system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm that there was a visitor even while the owner of a telephone set is away from home. SOLUTION: In a base unit 1, a mode select switch 13a is turned on in the case of going outside and one input terminal of an AND gate 13d is turned to a high level. When a visitor presses a chime switch 21a of a handset 2, the signal of high level is outputted from a chime switch part 21 so that the signal of high level can be outputted from the AND gate 13d and applied to a read control terminal RE of a telephone number register memory 12b. The telephone number register memory 12b reads out the telephone number of a telephone set 4 of a registered destination or carried portable telephone 5 and applies it to a call dial part 12d. The call dial part 12d calls the telephone set 4 or portable telephone 5 of that telephone number. Thus, the visitor can talk with a person, who goes outside, by means of any one of telephone set 4 or portable telephone 5 while using a microphone 22 and a speaker 24 of the handset 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intercom apparatus capable of making a call to an absent visitor from a remote place using a telephone function.

[0002]

2. Description of the Related Art Conventionally, various types of interphones, such as office and industrial interphones used for communication within a premises and a calling interphone for notifying that a visitor has visited in a house or the like, have been widely used. .

[0003] In particular, when a visitor presses a chime switch of an external device provided outside the building, a speaker of an internal device provided inside the building emits a chime sound. A call is made. When a person in the building, such as a resident, answers the call, the person can talk with the visitor via a speaker that also functions as a microphone of the external device and the internal device.

[0004]

However, when the user is away, even if the visitor presses the chime switch,
Visitors cannot talk with residents. For this reason, the visitor cannot meet with the resident or the like, and the visit is wasted. Also, unless the visitor leaves a memo, the resident does not know that the visitor has come. Even if the memo of the visitor is left, it takes time and effort for the resident or the like to contact the visitor as necessary.

[0005] Further, if the visitor is a delivery person, not only can the deliveries not be delivered to the destination, but also the next deliverable date cannot be confirmed on the spot. In this case, it is possible to leave a memo so that the delivery destination can be informed of the possible delivery date, but such communication involves troublesomeness. In addition, if a contact from the delivery destination cannot be received, the delivery must be made again without knowing the possible delivery date.

[0006] The present invention has been made in view of the above circumstances, and has as its main object to provide an intercom apparatus that can easily confirm that a visitor has been present even when going out. It is still another object of the present invention to provide an intercom apparatus that enables a visitor to talk with a resident or the like when the resident or the like is absent.

[0007]

The intercom apparatus according to the present invention has a call switch for a visitor to perform a call operation, and an external communication means for making a call with a base unit provided in a building interior. An intercom apparatus comprising: a slave unit provided externally; and a base unit having a ring tone generation unit that generates a ring tone by operating the call switch and a base unit having an internal call unit for talking with the slave unit. In order to solve the above-mentioned problem, the master unit stores an access number of an access destination in advance, and an access number storage means for reading out the stored access number when the call switch is operated; A connection means is provided for connecting the slave unit and the access destination based on the access number read out.

In the above arrangement, when the visitor operates the call switch in the slave, the access number is read from the access number recording means. Then, the connection means connects the access destination of the access number and the slave unit. Thus, when the access destination is a communication device such as a telephone, the visitor can directly talk with the outsider of the access destination from the child device. If the access destination is an e-mail mailbox, the visitor can leave a message to the outsider in the form of voice mail or the like.

In the above intercom apparatus, it is preferable that the master unit includes connection control means for permitting or prohibiting a connection operation by the connection means by operating the call switch. In such a configuration, while the connection operation by the connection means is permitted by the control means when going out, the connection operation by the connection means is prohibited when the user does not go out, so that the visitor can call when not going out. Even if the switch is operated, the connection operation by the connection means is not performed.

In the above-mentioned intercom apparatus, it is preferable that the master unit has a notifying unit for notifying through the slave unit that the connection operation by the connecting unit has not been completed. With this configuration, even if the visitor operates the call switch and there is no response from the parent device for a while, the notifying unit notifies the visitor that the connecting operation by the connecting unit is not completed. Therefore, the visitor can stay.

In the above intercom apparatus, the slave unit has a password input unit for inputting a password, and the base unit includes a password storage unit for storing a preset password; It is preferable to have a comparing means for comparing the input password and the input password, and a connection permitting means for permitting the connection operation by the connecting means only when both passwords match. In such a configuration, the password stored by the password storage unit and the password input by the password input unit are compared by the comparison unit. As a result, when the two match, the connection operation by the connection means is permitted by the connection permission means, and the child device and the access destination are connected. Therefore, only the visitor who knows the password can access the access destination.

In the above-described intercom apparatus, it is preferable that the slave unit has an image reading means for reading an image of a visitor and outputting the image to the master unit. Thus, when the slave unit is connected to the access destination by the connection unit, the image of the visitor can also be transmitted to the access destination.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The intercom apparatus according to the present embodiment
As shown in FIG. 1, a main unit 1 provided inside a building and a slave unit 2 provided outside the building are provided.

The slave unit 2 has a chime switch section 21, a microphone 22, an amplifier circuit 23, a speaker 24, and a video camera 25.

The chime switch section 21 comprises a chime switch 21a and a resistor 21b. Resistance 21
b has one end connected to the power supply and the other end grounded. Chime switch 21 as a call switch
a has one end connected to the ground-side end of the resistor 21b and the other end connected to one input terminal of AND gates 13d and 13e described later. This chime switch section 21
Indicates that the chime switch 21a is not pressed (OFF
State) to output a low-level signal to the base unit 1 while
When the chime switch 21a is pressed (ON state), a high-level signal is output to the base unit 1.

The microphone 22 as an external communication means is a converter that takes in the sound of the handset 2 and sends it to the base unit 1 as a sound signal. The amplification circuit 23 is a circuit that amplifies an audio signal from a microphone 11c of the master device 1 described later. The speaker 24 as an external communication means is a converter for converting the audio signal amplified by the amplifier circuit 23 into sound. The video camera 25 as an image reading unit captures an image of the visitor who looked into the slave 2 and sends it to the master 1 as a video signal.

Base unit 1 includes an intercom unit 11, a telephone function unit 12, and a selection circuit 13.

The intercom unit 11 includes an amplifying circuit 11a.
, Speaker 11b, microphone 11c, display processing unit 1
1d, display 11e, and chime sound generator 11
f.

The amplifying circuit 11a is a circuit for amplifying an audio signal from the microphone 22 of the slave unit 2. The speaker 11b as an internal communication means is a converter for converting the audio signal amplified by the amplifier circuit 11a into a voice. The microphone 11c as an internal communication means is a converter that takes in the voice of the base unit 1 and sends it to the handset 2 as a voice signal.

The display processing section 11d includes a circuit for performing processing necessary for displaying an image of a video signal from the video camera 25 of the slave unit 2 on the display 11e, a video RAM for expanding display data, and the like. I have. Display 1
Reference numeral 1e denotes a display device that displays an image captured by the slave unit 2 based on a display signal from the display processing unit 11d. The display 11e is preferably a flat panel display (for example, a liquid crystal display) that can be configured to be thin.

The chime sound generating section 11f as a ringing sound generating means generates a chime sound by a high-level signal from an AND gate 13e described later. For this reason, although not shown, the chime sound generating section 11f has a circuit for generating a chime signal and a speaker for converting the chime signal into sound.

The telephone function unit 12 includes a push button unit 12
a, a telephone number registration memory 12b, and a compression processing unit 12c.
, A telephone dial unit 12d, and a changeover switch 12e.

The push button unit 12a has buttons of numbers 0 to 9 for inputting at least a telephone number. In addition, the push button unit 12a may have various buttons other than the number buttons so that the base unit 1 can be used as a telephone.

The telephone number registration memory 12b as an access number storage means is a memory for storing a telephone number as an access number input from the push button unit 12a, and is substantially the same as a memory for registering a telephone number in a general telephone. It has the same function. However, the telephone number registration memory 12b reads out the telephone number only when the read control terminal RE is at the high level.

The compression processing unit 12c compresses the video signal from the video camera 25 in the slave unit 2 by a predetermined compression method so as to reduce the amount of information that can be transmitted through the public telephone line 3 described later.

Call dial section 12d as connection means
Is a DTMF (Dual Tone Multiplexed Frequency) based on the telephone number read from the telephone number registration memory 12b.
cy), etc. The tone signal generated by the call dial section 12d is sent to an exchange (not shown) provided on the public telephone line 3.

The changeover switch 12e is a switch for changing over the connection between the push button unit 12a and the telephone number registration memory 12b or the telephone dial unit 12d. When the changeover switch 12e connects the push button unit 12a and the telephone number registration memory 12b, the telephone number input by the push button unit 12a is written into the telephone number registration memory 12b, and the telephone number is registered. When the changeover switch 12e connects the push button unit 12a and the call dial unit 12d, the push button unit 12e
The telephone number input by a is input to the call dial unit 12d (operation for making a normal telephone call).

By providing the changeover switch 12e in this manner, the push button unit 12a can be shared for inputting a telephone number and registering a telephone number when using a normal telephone.

The selection circuit 13 includes a mode selection switch 13
a, a resistor 13b, an inverter 13c, and AND gates 13d and 13e.

The resistor 13b has one end connected to the power supply, the other end connected to one end of the mode selection switch 13a,
c and the other input terminal of the AND gate 13e. The other end of the mode selection switch 13a is grounded, and the output terminal of the inverter 13c is connected to the other input terminal of the AND gate 13d. The mode selection switch 13c as a connection control unit is a switch for switching between a normal mode and an absence mode.

In the normal mode, when the chime switch 21a of the slave unit 2 is pressed, the master unit 1 operates the chime sound generation unit 11f.
Is a mode in which a chime sound is generated to operate as a normal intercom. On the other hand, the answering mode is a mode in which when the chime switch 21a of the slave unit 2 is pressed, the master unit 1 operates as a telephone that dials a registered telephone number without generating a chime sound in the chime sound generation unit 11f. It is.

The output terminal of the AND gate 13d is connected to the read control terminal RE of the telephone number registration memory 12b.
The output terminal of the ND gate 13e is connected to the aforementioned chime sound generator 11f.

The master unit 1 and the slave unit 2 are connected via a connection line for transmitting signals such as audio and video, but the signals are transmitted by wireless communication such as Bluetooth (registered trademark). May be.

Here, the external configuration of the master unit 1 and the slave unit 2 will be described.

As shown in FIG. 2, base unit 1 has a handset 15 corresponding to a telephone receiver. The handset 15 is set on the left side of the base unit 1 and has a receiver 15a and a transmitter 15b. Receiver 1
The speaker 11b is built in 5a, while the microphone 11c is built in the transmitter 15b.

On the right side of the receiver 15a of the handset 15 in the base unit 1, a display 11e is incorporated. Furthermore, the handset 15 in the base unit 1
On the right side of the transmitting section 15b, a push button section 12a,
A changeover switch 12e, a mode selection switch 13a, a changeover switch 14c, and the like are provided.

The slave unit 2 is attached to, for example, an entrance note on a building outdoor wall. As shown in FIG.
The video camera 25 is built in the upper part, and the speaker 24 and the microphone 22 are built in the lower part. Further, a chime switch 21a is provided further below the speaker 24.

Next, the operation of the intercom apparatus configured as described above will be described.

First, when making a call using the intercom apparatus, the changeover switch 12e in the telephone function section 12 connects the push button section 12a and the telephone dial section 12d. As a result, the telephone number input by the push button unit 12a is given to the telephone dial unit 12d, and the telephone dial unit 12d sends the telephone number to the exchange on the public telephone line 3.

When a visitor makes a call, the intercom apparatus operates as follows.

First, in order to register a telephone number, a changeover switch 12e connects the push button unit 12a to the telephone number registration memory 12b. In this state, when a telephone number is input from the push button unit 12a, the data is written into the telephone number registration memory 12b.

In the selection circuit 13, in the normal mode in which the mode selection switch 13a is not depressed and the mode selection switch 13a is not pressed, the input terminal side of the inverter 13c is at a high level, so that the output terminal side of the inverter 13c, that is, A
One input terminal side of the ND gate 13d is at a low level. On the other hand, one input terminal side of the AND gate 13e is at a high level.

In this state, when the chime switch 21a is pressed and turned on by the visitor in the slave unit 2, a high-level signal is output from the chime switch unit 21 to the master unit 1. However, since one input to AND gate 13d is at low level, this high level signal is applied to read control terminal RE of telephone number registration memory 12b. For this reason, the telephone number registered in the telephone number registration memory 12b is not read. Since one input to the AND gate 13e is at a high level, the high-level signal is input to the chime sound generator 11f. As a result, the chime sound generator 11f generates a chime sound.

On the other hand, in the answering mode in the ON state in which the mode selection switch 13a is pressed in the selection circuit 13, the input terminal side of the inverter 13c is at a low level, so that the output terminal side of the inverter 13c, that is, AND
One input terminal side of the gate 13d is at a high level.
On the other hand, one input terminal side of the AND gate 13e is at a low level.

In this state, when the chime switch 21a is pressed and turned on by the visitor in the slave unit 2, a high-level signal is output from the chime switch unit 21 to the master unit 1. Then, since one input to the AND gate 13d is at a high level, a high-level signal from the slave unit 2 is sent to the read control terminal RE of the telephone number registration memory 12b.
Given to. Thereby, the telephone number registration memory 12b
, The registered telephone number is read. Also, AN
Since one input to the D gate 13e is at a low level, a low level signal from the AND gate 13e is input to the chime sound generator 11f. As a result, the chime sound generator 11f does not generate a chime sound.

In this case, when the telephone number read as described above is input to the telephone dial unit 12d, the telephone dial unit 12d notifies the telephone number of the telephone number. Thus, the exchange connects the line on the side of the base unit 1 to the line of the other party through the public telephone line 3 (for the mobile phone 5, the base station 6 provided in the public telephone line 3), and the telephone 4 or the access destination is connected. Call the telephone number of the mobile phone 5.
At this time, when the resident or the like at the visitor's visitor hangs up on the telephone 4 or the mobile phone 5 while away from home, the child unit 2 can communicate with the visitor via the master unit 1.

In this state, the visitor is
When the user speaks toward 2, the voice signal is transmitted to the base unit 1, and the face of the visitor is photographed by the video camera 25, and the video signal is transmitted to the base unit 1. In the base unit 1, the video signal from the slave unit 2 is compressed by the compression processing unit 12c and input to the call dial unit 12d. In the call dial section 12d, the audio signal from the handset 2 and the compressed video signal are multiplexed and output to the line. Therefore, if the other party's telephone 4 or mobile phone 5 can display a received image, the telephone 4 or mobile phone 5 can talk with the visitor and also see the visitor's face.

As described above, in the intercom apparatus according to the present embodiment, by pressing the mode selection switch 13a to switch to the absence mode and going out, when the visitor presses the chime switch 21a, the telephone 4 to which the user is going out is automatically set. Alternatively, the mobile phone 5 being carried is called. Thereby, it is possible to have a conversation with an unexpected visitor to home or the like on the go, and the visit of the visitor is not wasted. In particular, when the visitor is a delivery person, a notification such as a delivery date again can be transmitted from the outside. Also, if this intercom apparatus is installed in a public facility (building of a company or the like) and the access destination is set to a security company or the like, a visitor visits when no one is on a holiday or the like, and the chime switch 21a is turned on. When operated, the telephone 4 or the mobile phone 5 of the security company is called. This allows the visitor to inform the security company representative of the intention of the visit.

Since it takes a while for the visitor to press the chime switch 21a and connect to the telephone 4 or the mobile phone 5 while away from home, the visitor determines that he / she is away because there is no response during that time. And may leave. In such a case, even if the phone is connected,
Cannot talk to visitors.

To solve such a problem, as shown in FIG. 1, when the output signal of the AND gate 13d goes high, the message memory 1 for outputting a voice message is output.
1 g (notification means) may be provided in the intercom unit 11. As a result, when the chime switch 21a is pressed while the absence mode is set, an audio signal is output from the message memory 11g to the slave unit 2, and for example,
The message "Connecting to the telephone on the go. Please wait a little longer" is reproduced on the speaker 24.
Although not shown, a display message may be sent from the master unit 1 to the slave unit 2 by a high-level output signal of the AND gate 13d, and a similar message may be displayed on the display unit of the slave unit 2.

By the way, if the telephone 4 or the cellular phone 5 is called every time the chime switch 21a is pressed even for a visitor who does not need to respond to sales or mischief when the user is out, the outgoing person will be notified. It gives annoyance. Therefore, it is preferable that the telephone 4 or the mobile phone 5 be called only for a visitor who needs to respond. FIG. 4 shows a modification of the intercom apparatus for realizing this.

In this intercom apparatus, the telephone 4 or the mobile phone 5 is called only when the password set in advance matches the password entered by the visitor. Specifically, base unit 1 further includes password unit 14 in addition to intercom unit 11, telephone function unit 12 and selection circuit 13, while handset 2 includes password input unit 26.

The password section 14 includes a password registration memory 14a, a comparator 14b,
c.

The password registration memory 14a as a password storage means is a memory for storing a password input from the push button unit 12a. When a high level signal from the AND gate 13e is input to the read control terminal RE, the password registration memory 14a reads the registered password.

The form of the password registered in the password registration memory 14a is most commonly a combination of a plurality of digits, but may be another form, for example, an algorithm password. The algorithm password is a result obtained by performing an operation or the like on a given number or the like according to a predetermined algorithm.
When using an algorithm password, it is necessary to memorize the algorithm itself. When an algorithm password is used, a certain basic numeral and a predetermined algorithm such as an operation to be performed on the basic numeral are registered in the password registration memory 14a.

The comparator 14b as a comparing means is
The password input by the password input unit 26 of the slave unit 2 is compared with the password read from the password registration memory 14a, and when they match, a high-level match signal is output from the comparison output terminal.

The changeover switch 14c is a switch provided in place of the changeover switch 12e, and includes a push button unit 12a, a password registration memory 14a,
Phone number registration memory 12b or call dial section 12d
Switch for switching the connection with the Changeover switch 1
4c is a push button unit 12a and a telephone number registration memory 1
The function of switching the connection with 2b or the call dial unit 12d is equivalent to that of the changeover switch 12e.
When the changeover switch 14c connects the push button unit 12a and the password registration memory 14a, the password input by the push button unit 12a is written into the password registration memory 14a, and the password is registered.

By providing the changeover switch 14c in this manner, the push button unit 12a can be shared for inputting a telephone number, registering a telephone number and inputting a password when using a normal telephone.

The selection circuit 13 includes an AND gate 13
f is further provided. The AND gate 13f as connection permitting means has one input terminal connected to the AND gate 13d, the other input terminal connected to the comparison output terminal of the comparator 14b, and the output terminal connected to the telephone number registration memory 1
2b is connected to the read control terminal RE.

The password input unit 26 has at least a numeric keypad for inputting a password composed of numbers and the like, and a display unit for displaying the input password. The password input unit 26 sends the input password to the parent device 1 as password data.

In the intercom apparatus configured as described above, when registering a password, first, the changeover switch 14c connects the push button unit 12a to the password registration memory 14a. In this state, when a password is input from the push button unit 12a, the password is written to the password registration memory 14a.

When the chime switch 21a of the slave unit 2 is turned on while the mode selection switch 13a in the selection circuit 13 is turned on, a high-level signal from the AND gate 13e is input to the password registration memory 14a. Then, the password is stored in the password registration memory 14a.
And is input to the comparator 14b. On the other hand, in the handset 2, the password is displayed on the password input section 26.
The password input unit 26 is provided with an O of the chime switch 21a.
A message prompting for a password is displayed by N. When the visitor inputs a password in accordance with the password, the password is input to the comparator 14b of the parent device 1.

The comparator 14b compares the input passwords and outputs a high-level coincidence signal when the two passwords match. The AND gate 13f receives the high-level signal from the AND gate 13d and the above-mentioned coincidence signal, and thus provides a high-level signal to the telephone number registration memory 12b. As a result, the registered telephone number is read from the telephone number registration memory 12b, and the telephone dialing unit 12d calls the telephone 4 or the mobile telephone 5 based on the telephone number.

In the above intercom apparatus, when the chime switch 21a is turned on, the password is read from the password registration memory 14a. At this time, the input timing of the registered password to the comparator 14b and the password input section 26 From the input timing of the password to the comparator 14b. To deal with such inconvenience, the password read from the password registration memory 14a is temporarily held by a latch or the like, and the password input unit 2
In synchronization with the timing when the password is input from 6,
The stored password may be read out to the comparator 14b.

In the above intercom apparatus, when the chime switch 21a is turned on, the AND
Since the output terminal of the gate 13d goes high, when the password is subsequently input from the password input section 26 to the comparator 14b and a match signal is output from the comparator 14b, the output terminal of the AND gate 13d changes to low level. are doing. Therefore, the output terminal of the AND gate 13f cannot be set to the high level,
The telephone number cannot be read from the telephone registration memory 12b. In order to avoid such inconvenience, a holding circuit for maintaining the ON state of the chime switch 21a for a predetermined period (at least until a match signal is output from the comparator 14b) is provided.

By the way, in the above intercom apparatus, when an algorithm password is used as a password, the intercom apparatus operates as follows. First,
The basic numbers read from the password registration memory 14a are displayed on the password input unit 26. The visitor enters a password according to the stored algorithm. This password is compared with the password read from the password registration memory 14a and the comparator 14
If they match by comparison of b, as in the above case,
The telephone 4 or the mobile phone 5 is called.

As described above, according to the above-mentioned intercom apparatus, only the specific visitor can talk with the resident or the like of the visit destination by teaching the password to only the specific visitor. As a result, it is not necessary to deal with all the visitors by telephone, and the trouble is relieved.

However, since the password cannot be given to an unspecified visitor such as a delivery person who needs a response, the intercom apparatus cannot respond to such a visitor. Therefore, it is necessary to determine whether or not to use a password depending on the type of visitor to be handled. In order not to use a password, a configuration for disabling the operation of the password unit 14 is added.

More specifically, in master device 1, a circuit for pulling up the input terminal of AND gate 13f to which comparator 14b is connected to a high level, and the connection between the input terminal and this circuit or comparator 14b are switched. A switch is provided. In the slave unit 2, a configuration that does not operate the password input unit 26, for example, a circuit that does not allow the password input unit 26 to input an ON trigger of the chime switch 21 a is provided.

Although the present embodiment has been described with respect to a configuration in which a telephone conversation is performed, a message from a visitor can be left using an e-mail if the present intercom apparatus is used. For example, call dial unit 1
The voice data from 2d is stored as voice mail in a mailbox provided on the Internet via a digital line such as ISDN. With this method, the visitor cannot directly talk to the outsider, but the outsider can easily confirm that there is a visitor by listening to the voice mail when returning home. In this case, a memory for registering a mail address as an access number is provided instead of the telephone registration memory 12b.

[0072]

As described above, the intercom apparatus of the present invention has a call switch for a visitor to perform a call operation and an external communication means for making a call with a base unit provided in a building. A sub-unit provided in the building outdoor area, a ringing tone generating unit for generating a ringing tone by operating the above-mentioned calling switch, an internal calling unit for making a call with the sub-unit, and an access number of an access destination stored in advance. ,
Access number storage means for reading an access number stored when the call switch is operated, and connection means for connecting the slave unit and an access destination based on the access number read when the switch is operated This is a configuration having

Thus, when the access destination is a communication device such as a telephone, the visitor can directly talk with the outsider of the access destination from the child device. If the access destination is an e-mail mailbox, the visitor can leave a message to the outsider in the form of voice mail or the like.
Therefore, it is possible to easily confirm that there is a visitor who has visited the home or the like while the person is out.

In the above-described intercom apparatus, the base unit includes connection control means for permitting or prohibiting the connection operation by the connection means by operating the call switch. If the operation is permitted and the connection operation by the connection unit is prohibited when the user does not go out, the connection operation by the connection unit is not performed even if the visitor operates the call switch when the user does not go out. Therefore, it is possible to easily set whether the visitor can access the access destination only when going out.

In the above-described intercom apparatus, the master unit has a notifying unit for notifying through the slave unit that the connection operation by the connecting unit has not been completed. If the user operates the call switch and there is no response from the parent device for a while, the notifying unit notifies the visitor that the connecting operation by the connecting unit is not completed, so that the visitor can stay. .
Therefore, there is an effect that the visitor can more reliably access the access destination.

In the above intercom apparatus, the slave unit has a password input unit for inputting a password, and the master unit includes a password storage unit for storing a preset password, and a password storage unit for storing a preset password. And a connection permitting means for permitting the connection operation by the connecting means only when both passwords match, so that only visitors who know the password can access And can be accessed. Therefore, there is an effect that the access to the access destination by the visitor can be restricted as desired.

Further, in the above-described intercom apparatus, since the slave unit has image reading means for reading an image of a visitor and outputting the image to the master unit, the slave unit is connected to the access destination by the connection means. When connected, the visitor's image can also be sent to the access destination. The effect is that the visitor can be confirmed at the access destination.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an intercom apparatus according to an embodiment of the present invention.

FIG. 2 is a front view showing an external configuration of a master unit of the intercom apparatus.

FIG. 3 is a front view showing an external configuration of a slave unit of the intercom apparatus.

FIG. 4 is a block diagram showing a configuration of a modified intercom apparatus according to one embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 master unit 2 slave unit 4 telephone (access destination) 5 mobile phone (access destination) 11 b speaker (internal communication means) 11 c microphone (internal communication means) 11 f chime sound generator (ring sound generation means) 11 g message memory (notification means) 12b Telephone number registration memory (access number storage means) 12d Call dial section (connection means) 13a Mode selection switch (connection control means) 13f AND gate (connection permission means) 14a Password registration memory (password storage means) 14b Comparator (comparison) Means) 21a Chime switch (call switch) 22 Microphone (external communication means) 24 Speaker (external communication means) 25 Video camera (image reading means)

Continued on the front page F term (reference) 5C054 AA02 AA05 CA04 CC02 CD06 CE16 CH02 DA07 DA09 EA01 EA03 EA05 EG05 FA02 FA04 FF02 FF03 FF07 HA22 5K027 AA09 BB01 HH08 5K038 AA05 CC02 DD22 FF12

Claims (5)

[Claims] 1. A call switch for a caller to perform a call operation and an external communication means for making a call with a base unit provided inside a building, wherein a slave unit provided outside the building and the call switch are provided. An intercom apparatus comprising: a ringing tone generating means for generating a ringing tone by the operation of the above; and a master unit having an internal calling means for talking with the slave unit, wherein the master unit has an access number of an access destination in advance. Remember
Access number storage means for reading an access number stored when the call switch is operated, and connection means for connecting the slave unit and an access destination based on the access number read when the switch is operated And an intercom device. 2. The intercom apparatus according to claim 1, wherein said base unit includes connection control means for permitting or prohibiting a connection operation by said connection means by operating said call switch. 3. The device according to claim 1, wherein the master unit has a notifying unit for notifying through the slave unit that the connection operation by the connecting unit has not been completed. Intercom equipment. 4. The child device has password input means for inputting a password, and the parent device stores a password storage means for storing a password set in advance, and a password storage means for storing the set password and the input password. 2. The apparatus according to claim 1, further comprising: comparing means for comparing, and connection permitting means for permitting the connecting operation by the connecting means only when both passwords match.
4. The intercom apparatus according to any one of claims 3 to 3. 5. The intercom according to claim 1, wherein said slave unit has image reading means for reading an image of a visitor and outputting the image to said master unit. apparatus.