JP2015046665A - Intercom system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intercom system which disables a person in a neighboring house or person other than a visitor close to an intercom slave unit from discriminating who is talking in a house and what is being talked about.SOLUTION: An intercom slave unit 100 includes a first slave unit speaker 103 for acoustically outputting voice data of a person in a room with non-directivity, and a second slave unit speaker 104 for making the voice data of the person in the room have directivity to output it with ultrasonic wave. An intercom master unit 200 includes a master unit operation part 201 for activating an output function of the second slave unit speaker 104 of the slave unit 100 and a master unit CPU 205 for detecting the operation of the master unit operation part 201 to transmit the control signal for activating the output function of the second slave unit speaker 104 to the slave unit 100. The intercom slave unit 100 includes output control parts 109, 111 for deactivating an output function of the first slave unit speaker 103 and activating the output function of the second slave unit speaker 104 when detecting the control signal from the master unit CPU 205.

Description

  The present invention includes an interphone slave unit having a speaker and a microphone and an interphone master unit having a speaker and a microphone, and a person in the room responds to a call from the interphone slave unit by a visitor and makes a call. It is related with the intercom system for performing.

  Conventionally, an intercom cordless handset installed at the entrance, where a visitor calls a resident in the house to establish a call, and a call from the intercom cordless handset installed by the visitor to the resident And an intercom system including an interphone master that allows a resident to establish a call with a visitor (see, for example, Patent Document 1).

  The interphone slave unit is provided with a call switch, a slave unit microphone, and a slave unit speaker. The interphone master unit is provided with a call switch, a master unit microphone, and a master unit speaker. These interphone slave unit and interphone master unit transmit. It is electrically connected by a road.

  According to the interphone system configured as described above, when a visitor presses the call switch of the interphone slave unit, the call signal is transmitted to the interphone master unit. By pressing the call switch of the master unit, a call path is formed between the interphone slave unit and the interphone master unit. Thereby, a visitor and a resident can talk. At this time, a ringing sound is emitted from the handset speaker of the intercom handset.

  In addition, when such an interphone system has an abnormality in the house, the interphone parent device can detect the abnormality and output an omnidirectional alarm sound from the child device speaker of the interphone child device.

JP 2003-333197 A

  However, in the intercom system described in the background art, when a call is made to the interphone master unit with the interphone slave unit installed outside the dwelling unit of the entrance, an omnidirectional speaker is used as the slave unit speaker of the interphone slave unit. Therefore, it is possible to determine who is talking to the person other than the visitor who is near the neighbor or intercom cordless handset, and to protect the resident's privacy appropriately. There was a difficulty that could not be. Moreover, it is not preferable from another viewpoint of crime prevention that another person is asked about the content of the conversation.

  The present invention has been made to solve such a conventional problem, and it is determined which person in the house is talking to a person other than a visitor near a neighbor or intercom slave. By making it impossible, it is possible to appropriately protect the privacy of the occupants, and it is possible to ensure crime prevention by allowing the alarm sound to be heard by a person near the neighbor or intercom handset An object is to provide a possible intercom system.

  An intercom system according to a first aspect of the present invention that achieves the above-described object is an interphone cordless handset installed outside a dwelling unit, where a visitor calls a resident in the dwelling unit to make a call, and a visitor installed inside the dwelling unit. An interphone system having an interphone master unit that responds to a call from a person who makes a call, and the interphone slave unit includes a slave unit microphone that inputs voice of a visitor and generates voice data, A first handset speaker that audibly outputs the voice data of the person omnidirectionally, and a second handset speaker that outputs the sound of the occupant's voice data with directivity and is an interphone parent. A master unit operating unit that is operated to activate an ultrasonic output function from the second slave unit speaker among the first and second slave unit speakers of the interphone slave unit, and a master unit operation unit Detecting the operation of the And a base unit CPU that transmits a control signal for activating an ultrasonic output function from the handset speaker to the interphone handset, and the interphone handset has a control transmitted from the base unit CPU of the interphone base unit. When a signal is detected, an output control unit is provided that deactivates the sound output function of the first handset speaker and activates the ultrasonic output function of the second handset speaker.

  According to the interphone system according to the first aspect as described above, when the master unit operation unit of the interphone master unit is operated to activate the ultrasonic output function from the second slave unit speaker of the interphone slave unit, Since the CPU transmits a control signal for activating the ultrasonic output function from the second handset speaker to the interphone handset, the output control unit of the interphone handset is based on the control signal. And the ultrasonic output function of the second handset speaker can be made active. Therefore, when the resident responds with the handset microphone, the response voice can be given directionality, so that who is in the house and who is near the neighbor or intercom handset It can be made indistinguishable whether it is talking.

  The intercom system according to the second aspect of the present invention is the intercom system according to the first aspect, wherein the output control unit of the intercom handset is an output from at least one of the first handset speaker and the second handset speaker. The function is activated.

  According to the interphone system as the second aspect, the output control unit of the interphone slave unit receives the control signal for selecting the first and second slave unit speakers, thereby receiving the control signal from the interphone master unit. It is possible to determine whether the transmitted sound has directivity or non-directivity and select an appropriate speaker.

  According to a third aspect of the present invention, in the interphone system according to the first aspect or the second aspect, the interphone slave unit includes an imaging unit that generates video data of a visitor, and the interphone master unit is an interphone slave unit. Whether or not a visitor exists within an audible range of the ultrasonic output from the second handset speaker of the interphone handset is provided with a display section for outputting the video data generated by the image pickup section. The audible range area showing the is displayed.

  According to the intercom system as the third aspect, it is possible to easily determine whether or not the visitor can listen to the ultrasonic sound by setting the audible range area on the display unit.

  According to a fourth aspect of the present invention, in the interphone system according to the third aspect, the display unit of the interphone master unit is operated when the visitor is present outside the audible range area. Is displayed.

  According to the intercom system which is such a fourth aspect, since the input operation corresponds to the operation explanation on the screen, the operation is easy to understand intuitively.

  According to the intercom system of the present invention, it is impossible to determine who is talking in a house to a person other than a visitor who is near a neighbor or an interphone handset, so that the privacy of the resident The alarm sound can be heard by a person near the neighbor or the intercom cordless handset so that crime prevention can be ensured.

It is a circuit block diagram showing a preferred embodiment in the intercom system of the present invention. It is explanatory drawing which shows the display part which is a component of the intercom system of this invention, (A) is a figure where a visitor is located in an audible range area, (B) is a figure where a visitor is located outside an audible range area It is.

  Hereinafter, preferred embodiments of the intercom system of the present invention will be described with reference to the drawings. FIG. 1 shows a circuit block diagram of the intercom system of the present invention.

  As shown in FIG. 1, an interphone system 100 according to a preferred embodiment of the present invention is installed outside a dwelling unit, and an interphone handset 100 in which a visitor calls a room resident in a dwelling unit to make a call, An intercom master unit 200 installed in a dwelling unit and responding to a call from a visitor, which makes a call, has a call / call line L10, two power lines, and video lines L11 and L12. Each is connected via a path L1.

  Interphone base unit 200 includes base unit operation unit 201, base unit speaker 202, base unit microphone 203, display unit 204, base unit CPU 205, call detection circuit 206, FM demodulation circuit 207, first base unit transformer 208, base unit. Audio processing unit 209, ultrasonic control circuit 210, relay circuit 211, second parent device transformer 212, relay control circuit 213, parent device power supply circuit 214, first child device power switch 215, and second child device A power switch 216 is provided.

  The base unit operation unit 201 includes a call button 201a and a privacy button 201b. The call button 201a is used by a room occupant who has confirmed that there is a call from a visitor at the intercom handset 100 to perform a response operation for establishing a call with the visitor. In order to confirm that there is a call from a visitor at intercom handset 100, call detection circuit 206 is connected to call / call line L10 and base unit CPU 205. The privacy button 201b is operated to activate an ultrasonic output function from the second handset speaker 104 of the first handset speaker 103 and the second handset speaker 104 of the interphone handset 100 to be described later. It is what is done. These call button 201a and privacy button 201b are connected to the master CPU 205, respectively.

  The base unit speaker 202 and the base unit microphone 203 are used to input / output voices (transmitted voices, received voices) for a resident to establish a call with a visitor. The master speaker 202 outputs the visitor's voice data in an omnidirectional manner, and a general omnidirectional loudspeaker is used.

  The parent device speaker 202 and the parent device microphone 203 are connected to the parent device sound processing unit 209, respectively. The base unit voice processing unit 209 has a function of switching the transmission state or the reception state by comparing the signal level of the transmission sound and the signal level of the reception sound when talking with the interphone handset 100 in a loud state. ing. A voice switch is suitable as the base unit voice processing unit 209.

  A relay circuit 211 is connected to the master audio processing unit 209, and a second master transformer 212 connected to the two power supply / video lines L 11 and L 12 is connected to the relay circuit 211. The second base transformer 212 is used for unbalance-balance conversion of various audio signals transmitted from the relay circuit 211 to the call / call line L10. The relay circuit 211 is controlled by a relay control circuit 213 connected to the master CPU 205. In such a relay circuit 211, the output terminal of the parent device audio processing unit 209 connected to the parent device microphone 203 is connected to the break contact, and this output terminal is further connected to the input terminal of the ultrasonic control circuit 210. The make contact of the relay circuit 211 is connected to the output terminal of the ultrasonic control circuit 210, and the ultrasonic control circuit 210 is connected to the master CPU 205. The input terminal of base unit voice processing unit 209 is connected to call / call line L10.

  Therefore, when the privacy button 201b of the base unit operation unit 201 is turned ON, a relay switching signal is transmitted from the base unit CPU 205 to the relay control circuit 213. Therefore, the relay control circuit 213 controls the relay circuit 211 to make the make contact and the first contact. The two parent transformers 212 can be connected. Since the relay switching signal is not transmitted from the master CPU 205 when the privacy button 201b is turned OFF, the relay control circuit 213 controls the relay circuit 211 to connect the break contact and the second master transformer 212. It can be returned to the state.

  The display unit 204 is for outputting video data generated by the imaging unit 102 of the interphone slave device 100 to be described later. For example, various display display media such as an LCD, a PDP, and an organic EL display are used. The

  Such a display unit 204 indicates whether or not a visitor is present within an audible range of ultrasonic output from the second handset speaker 104 of the interphone handset 100, as shown in FIG. The audible range area A1 is displayed. That is, the audible range area A <b> 1 can be partitioned on the display unit 204 by drawing a line LN on the display unit 204. By setting this audible range area A1 on the display unit 204, it is possible to easily determine whether or not the visitor can listen to the ultrasonic sound. In addition, since the audible range of a person's ultrasonic wave has an individual difference, it is good to set the audible range which most people can hear.

  Further, as shown in FIG. 2B, the display unit 204 may display an operation area of the master unit operation unit 201 that is operated when a visitor is present outside the audible range area A1. . For example, icons having functions of a call button 201a and a privacy button 201b may be provided on the display unit 204 as a touch panel type. As a result, the input operation corresponds to the operation explanation on the screen, so that the operation is easy to understand intuitively.

  The display unit 204 is connected to an FM demodulator circuit 207, which is connected to the master CPU 205 and controlled by the master CPU 205. Further, the FM demodulating circuit 207 is connected to the first master transformer 208 connected to the two power supply / video lines L11 and L12. The first base unit transformer 208 is used for balanced-unbalanced conversion of the FM modulation signal transmitted from the interphone handset 100 via the two power supply / video lines L11 and L12. 207 demodulates the FM modulation signal and causes the display unit 204 to display the video imaged by the imaging unit 102 of the intercom slave device 100.

  Base unit CPU 205 detects an operation of privacy button 201b of base unit operation unit 201, and sends a control signal for activating the ultrasonic output function from second handset speaker 104 of intercom handset 100 to the intercom unit. It has the function to transmit to the machine 100.

  The base unit power supply circuit 214 is controlled by the base unit CPU 205, generates a base unit power source that is rectified and smoothed with respect to the commercial power source of the interphone base unit 200, and supplies it to each component / circuit of the interphone base unit 200. This is for generating the power supply of the intercom slave device 100.

  The first handset power switch 215 supplies power to the two power / video lines L11 and L12 in response to the handset power supply signal output from the base CPU 205. The second handset power switch Reference numeral 216 is a power supply for the call / call line L10 that is momentarily cut off by a pulse signal output from the master CPU 205. The pulse signal output from the master unit CPU 205 detects the operation of the privacy button 201b of the master unit operation unit 201 and activates the ultrasonic output function from the second slave unit speaker 104 of the interphone slave unit 100. Control signal.

  Interphone handset 100 includes handset operating unit 101, image pickup unit 102, first handset speaker 103, second handset speaker 104, handset microphone 105, FM modulation circuit 106, first handset transformer 107, A handset audio processor 108, a relay circuit 109, a second handset transformer 110, a relay control circuit 111, a latch circuit 112, and a handset power supply circuit 113 are provided.

  When the interphone handset 100 is installed at the entrance, the handset operating unit 101 is a call button (a call button operated by a person at the entrance, for example, a visitor to call a room occupant in the dwelling unit) (Not shown) and connected to the call / call line L10.

  The imaging unit 102 is for capturing an image of a visitor who has performed a call operation with the call button of the slave unit operation unit 101, an image of the vicinity of the entrance, and the like. A camera (not shown) made of a medium and a video signal generation circuit (not shown) for performing signal processing on the video imaged by the camera and generating a video signal of an electrical signal are provided. This camera apparatus is connected to an FM modulation circuit 106 that FM modulates the video signal of the camera apparatus, and the FM modulation circuit 106 is connected to two power supply / video lines L11 and L12 via a first slave transformer 107. ing. The first handset transformer 107 performs balanced-unbalanced conversion of various signals sent from the intercom base unit 200 to the two power supply / video lines L11 and L12, and the video signal picked up by the image pickup unit 102 is converted. This is for unbalanced-balanced conversion of the FM modulation signal modulated by the FM modulation circuit 106 and sent to the two power supply / video lines L11 and L12.

  The first handset speaker 103, the second handset speaker 104, and the handset microphone 105 input and output voices (sending voice and receiving voice) for a visitor to establish a call with a resident. To do. The first handset speaker 103 outputs the voice data of the occupants omnidirectionally, and a general omnidirectional loudspeaker is used, and the second handset speaker 104 is the present handset speaker 104. The voice data of the room occupant has directivity to output ultrasonic waves, and a super directional speaker is used. The handset microphone 105 receives the voice of a visitor and generates voice data.

  When converting an electrical signal into a corresponding acoustic signal, it is preferable to use an ultrasonic transducer having a transmission characteristic with extremely good directivity in addition to high conversion efficiency. An ultrasonic transducer generates an acoustic signal by changing the shape of a piezoceramic material according to the electrostatic crystal device that generates an acoustic signal when the thin film vibrates due to the capacitive effect of the electric field. There is a piezoelectric crystal device. The number of such ultrasonic transducers is not limited to one, and a plurality of ultrasonic transducer arrays arranged in the same plane may be used.

  The first handset speaker 103, the second handset speaker 104, and the handset microphone 105 are each connected to a handset voice processing unit 108, and a relay circuit 109 is connected to the handset voice processing unit 108, A second handset transformer 110 connected to the relay circuit 109 is connected to the call / call line L10. In such a relay circuit 109, the first handset speaker 103 is connected to the break contact via the handset audio processing unit 108, and the second handset speaker 104 is connected to the make contact via the handset sound processing unit 108. It is connected.

  When the relay circuit 109 is connected to the second handset speaker 104, the handset voice processing unit 108 transmits an ultrasonic sound signal to the second handset speaker 104 via the buffer circuit and the coil. Yes. Thereby, the ultrasonic wave can be radiated in the air by the second handset speaker 104 based on the ultrasonic signal modulated according to the audible sound that can be comfortably heard by the visitor by the buffer circuit. The coil positioned between the second handset speaker 104 and the buffer circuit has a function of adjusting the capacitance component and the resonance frequency of the ultrasonic transducer that is the second handset speaker 104. Since the capacity of this coil varies depending on the number of ultrasonic transducers, the inductance value must be adjusted at the same time.

  The relay circuit 109 is controlled by a relay control circuit 111, and the relay control circuit 111 is connected to the call / call line L10 via a latch circuit 112. Note that the latch circuit 112 is preferably a trigger latch that operates on the condition that the latch signal rises and falls, but a level latch is also applicable. Therefore, when the latch circuit 112 detects a control signal which is a latch signal transmitted by the control of the master CPU 205 of the interphone master device 200, the latch circuit 112 controls the relay control circuit 111 to thereby perform the relay control. The circuit 111 can activate the sound output function of the first handset speaker 103 and activate the ultrasonic output function of the second handset speaker 104 by the relay circuit 109. These relay control circuit 111 and relay circuit 109 serve as an output control unit. In such a relay circuit 109, an input terminal connected to the first handset speaker 103 of the handset audio processing unit 108 is connected to the break contact. The make contact of the relay circuit 109 is connected to an input terminal connected to the second handset speaker 104 of the handset voice processing unit 108. The output terminal of the handset voice processing unit 108 connected to the handset microphone 105 is connected to the call / call line L10.

  The second slave unit transformer 110 is used for balanced-unbalanced conversion of a voice signal transmitted from the interphone master unit 200 to the calling call line L10. The voice signal received and generated by the handset microphone 105 is transmitted to the call / call line L10 via the amplifier (not shown) of the handset voice processing unit 108.

  The slave unit power supply circuit 113 is connected to the two-line power / video lines L11 and L12, and the slave unit power supplied from the interphone master unit 200 via the two-line power / video lines L11 and L12 is supplied to the interphone. It is for supplying to each part / circuit of the structure of the subunit | mobile_unit 100, respectively.

  A specific operation of the intercom system 1 configured as described above will be described below. Note that the two power supply / video lines L11 and L12 are FM modulation, and the call / call line is baseband. The two-line power / video lines L11 and L12 use the FM modulation method when the video data generated by the imaging unit 102 of the interphone slave unit 100 is displayed on the display unit 204 of the interphone master unit 200. In addition, this is to prevent image distortion and the like.

  When the power supply (not shown) of the interphone master device 200 of the interphone system 1 shown in FIG. 1 is turned on, the master device power supply circuit 214 of the interphone master device 200 is driven and the components / circuits of the interphone master device 200 are connected. Supply power each. Further, the master unit CPU 205 outputs a slave unit power supply signal to the first slave unit power switch 215 and the second slave unit power switch 216, whereby two power / video lines L11 and L12 are provided. Power is supplied to intercom handset 100 by supplying power between L11 and call / call line L10. As a result, an indicator lamp (not shown) including LEDs of the intercom handset 100 is turned on to enter a standby mode, so that a visitor can confirm that the intercom handset 100 is in use.

  When the intercom handset 100 is in use as described above, if a visitor performs a call operation with the call button of the handset operation unit 101 of the intercom handset 100, the two power supply / video lines L11 and L12 are connected. The voltage between the two lines of the power supply line L11 and the call / call line L10 is equal to or lower than a threshold value set in advance by the call detection circuit 206 of the intercom base unit 200. As a result, the call detection circuit 206 sends a call detection signal to the master CPU 205, so that the master CPU 205 rings a call speaker (not shown) based on the call detection signal and the interphone master 200 is called. Become a mode. That is, the base unit voice processing unit 209, the base unit speaker 202, and the base unit microphone 203 of the interphone base unit 200, the handset unit voice processing unit 108 of the interphone handset 100, the first and second handset speakers 103, 104, and A two-way call is possible with the handset microphone 105. The master unit CPU 205 may control the master unit voice processing unit 209 so that the call from the intercom slave unit 100 is sounded from the master unit speaker 202. This is a so-called voice call.

  When a person in the room listens to the calling speaker ring and operates the call button 201a of the base unit operation unit 201, the base unit CPU 205 drives the base unit voice processing unit 209 and the first handset. The power switch 215 is turned on, so that power is supplied to the slave unit power supply circuit 113 of the interphone slave unit 100 via the two-line power supply / video lines L11 and L12, and each component / circuit of the interphone slave unit 100 is configured. To drive. Thereby, the video data of the visitor imaged and generated by the imaging unit 102 is FM-modulated by the FM modulation circuit 106, and the FM modulation signal is supplied from the first slave unit 107 to the two power supply / video lines L11 and L12. Is transmitted to the FM demodulation circuit 207 via the first base unit transformer 208 of the interphone base unit 200, the video data FM demodulated by the FM demodulation circuit 207 is displayed on the display unit 204.

  At this time, when the visitor displayed on the display unit 204 is present in the audible range area A1 of the ultrasonic output from the second handset speaker 104, the person in the room is the neighbor or the interphone handset 100. When it is desired to make it impossible to determine what kind of talk is being made to a person other than a nearby visitor, the privacy button 201b of the parent device operation unit 201 is turned on. When the privacy button 201b is turned on, the master CPU 205 transmits a relay switching signal to the relay control circuit 213. Therefore, the relay control circuit 213 controls the relay circuit 211 to make the make contact and the second master transformer 212. Can be connected. As a result, the sound that the occupant responded with the base unit microphone 203 is generated as sound data and transmitted to the ultrasonic control circuit 210 via the base unit sound processing unit 209. It is converted into an output electric signal and transmitted to the call / call line L10 via the relay circuit 211 and the second master unit transformer 212.

  In addition, since the privacy button is turned on, a pulse signal serving as a control signal from the master CPU 205, for example, a 2.5 ms pulse signal, is input to the second slave power switch 216. Similarly, the latch circuit 112 of the intercom handset 100 outputs a latch signal to the relay control circuit 111 based on the instantaneous interruption of the power supply via the call / call line L10. Based on the latch signal, the relay control circuit 111 connects the relay circuit 109 to the second handset speaker 104 via the handset audio processing unit 108. Therefore, the electrical signal of the output of the ultrasonic vibration of the audio data from the interphone master device 200 can be output as the sound of the ultrasonic vibration from the second slave device speaker 104. In this way, since the sound output from the second handset speaker 104 can be directional, it is possible to tell who in the house what kind of talk to a person other than a visitor near the neighbor or interphone handset. It is possible to appropriately protect the privacy of the occupants by making it impossible to determine whether or not they are doing.

  If the visitor displayed on the display unit 204 of the interphone master unit 200 is outside the audible range area A1 of the ultrasonic output from the second slave unit speaker 104, the privacy button 201b is turned on. Therefore, in the relay circuit 109, the break contact and the second parent transformer 110 remain connected.

  In addition, since the privacy button is not turned on, the pulse signal from the master unit CPU 205 is not output to the second slave unit power switch 216, so that the relay circuit 109 of the intercom slave unit 100 is connected to the second transformer 110. The first handset speaker 103 is kept connected. Therefore, the electrical signal of the audio data from the intercom base unit 200 can be output from the first handset speaker 103. Since the sound can be output from the first handset speaker 103 in this way, the sound output from the first handset speaker 103 becomes omnidirectional, so that the visitor can use the second handset speaker. Even if it exists outside the audible range area A1 of the ultrasonic output from 104, the sound of the occupant can be heard.

  As described above, regardless of whether the privacy button is turned on or off, the voice that the occupant responded with the master microphone 203 is generated as voice data and the master voice processor 209, the relay circuit 211, and the second parent It is transmitted to the call / call line L10 via the machine transformer 212.

  In addition, what is necessary is just to perform OFF operation in order to cancel | release the ON operation state of the privacy button 201b. For example, when the relay circuits 109 and 211 of the intercom system are in the return state, the master unit CPU 205 recognizes the ON operation when the privacy button 201b is first pressed and the OFF operation when the privacy button 201b is pressed next. Thereafter, the latch signal output from the latch circuit 112 is stopped by a pulse signal of, for example, 2.5 ms, as in the privacy button ON operation.

  In the embodiment described above, the second handset speaker 104 with ultrasonic output is incorporated in the interphone handset 100. However, the present invention is not limited to this, and the visitor is located at a location where the interphone handset 100 can be operated. If it is possible to give the sound directivity of audible ultrasonic vibration to the person, the installation position of the second handset speaker 104 may be under the eaves of the building. In this case, the second handset The speaker 104 may be connected to the interphone slave device 100 or the interphone master device 200 in a line or wirelessly. Since it can be installed in this way, it can be used even in a limited installation place where howling occurs.

  Further, the output control units 109 and 111 of the intercom handset 100 have a function of activating an output function from at least one of the first handset speaker 103 and 104 and the handset speaker. It may be. That is, even when the second handset speaker 104 of the interphone handset 100 is selected by the privacy button 201b of the interphone base unit 200 as described above, the handset speaker selection button (not shown) is displayed on the base unit operation unit 201. The sound output function of the first handset speaker 103 may be activated. Specifically, when the first handset speaker 103 is selected by the handset speaker selection button, the base unit CPU 205 connects the break contact of the relay circuit 211 and the second base unit transformer 212 via the relay control circuit 213. Put it in a state. Therefore, the voice that the occupant responds with the base unit microphone 203 is generated as voice data and transmitted to the call / call line L10 via the base unit voice processing unit 209, the relay circuit 211, and the second base unit transformer 212. The

  As described above, the output control units 109 and 111 of the interphone handset 100 receive the control signal for selecting the first and second handset speakers 103 and 104, so that the audio transmitted from the interphone base unit 200 is transmitted. It is possible to determine whether the speaker has directivity or non-directivity and select an appropriate speaker.

  Further, when the first handset speaker 103 is selected by the handset speaker selection button, the pulse signal from the base unit CPU 205 is not output to the second handset power switch 216, so the relay circuit 109 of the interphone handset 100 is The second transformer 110 and the first slave speaker 103 are kept connected. Therefore, the electrical signal of the audio data from the intercom base unit 200 can be output from the first handset speaker 103.

  In such an intercom system 1, the first speaker 103 of the interphone slave unit 100 is selected unless the privacy button 201b of the interphone master unit 200 is turned on. Since it is output from the directional first speaker 103, it is possible to ensure crime prevention by enabling the alarm sound to be heard by a neighbor or a person near the intercom handset 100.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

DESCRIPTION OF SYMBOLS 1 ... Intercom system 100 ... Interphone cordless handset 102 ... Imaging part 103 ... First cordless handset speaker 104 ... Second cordless handset speaker 105 ... Cordless handset microphone 109 ... Relay circuit (output control part)
111 …… Relay control circuit (output control unit)
200 …… Interphone master unit 201 …… Master unit operation unit 205 …… Master unit CPU

A1 …… Audible range area

Claims (4)

An intercom handset installed outside the dwelling unit where a visitor calls a resident in the dwelling unit to make a call, and an intercom parent set up inside the dwelling unit and responding to the call from the visitor by which the room resident calls. An intercom system having a machine,
The intercom handset includes a handset microphone that generates voice data when the visitor's voice is input, a first handset speaker that outputs the voice data of the resident in a non-directional manner, and the resident room A second handset speaker that outputs ultrasonic waves with directivity to the voice data of the person,
The interphone master unit is configured to be operated to activate an ultrasonic output function from the second slave unit speaker among the first and second slave unit speakers of the interphone slave unit; A master unit CPU for detecting an operation of the master unit operation unit and transmitting a control signal for activating an ultrasonic output function from the second slave unit speaker to the interphone slave unit,
When the interphone slave unit detects the control signal transmitted from the master unit CPU of the interphone master unit, the interphone slave unit deactivates the sound output function of the first slave unit speaker and the second slave unit. An intercom system comprising an output control unit that activates an ultrasonic output function of a speaker.   The output control unit of the intercom handset activates an output function from at least one of the first handset speaker and the second handset speaker. Intercom system. The intercom handset includes an imaging unit that generates video data of the visitor,
The intercom base unit includes a display unit that displays the video data generated by the imaging unit of the intercom sub unit,
The display unit displays an audible range area indicating whether or not the visitor is present within an audible range of an ultrasonic output from the second handset speaker of the intercom handset. The intercom system according to claim 1 or 2.   The display unit of the intercom base unit displays an operation area of the base unit operation unit that is operated when the visitor is present outside the audible range area. Intercom system.

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