JP4265471B2 - Intercom system - Google Patents

Description

  The present invention relates to an intercom system.

  Conventionally, it is composed of a doorphone slave unit installed outside the home and a master unit installed in the home, and a communication path is formed between the master unit and the doorphone slave unit in response to a call from the doorphone slave unit. There is provided an intercom system for making a call between a master unit and a door phone slave unit via the communication path.

  FIG. 11A shows a calling sequence when calling the main unit A from the doorphone sub unit B, and the calling operation will be described with reference to this figure. When the call button of the door phone slave unit B is pressed once, a call signal is sent from the door phone slave unit B to the base unit A (S10). When the master unit A detects the call signal from the door phone slave unit B, the master unit A outputs a ring tone from the speaker of the master unit A, and also sends a ring tone output signal to the door phone slave unit B. After a ringing tone is also output from the mobile phone (S11), a transition is made to the calling state (S12). When the call button of the main unit A is pressed in the calling state, the main unit A forms a communication path with the door phone sub unit B and makes a call with the door phone sub unit B. Yes.

  In this conventional system, when a call button is pressed on the base unit A side in response to a call from the doorphone slave unit B, a call path between the base unit A and the doorphone slave unit B is formed. Until the key is pressed, the voice of the doorphone slave unit B cannot be heard on the master unit A side, so it was not known who the visitor was. Therefore, the householder in the house had to answer the call from the door phone cordless handset B without knowing who the visitor was, and the usability was bad.

  Accordingly, a TV intercom system has been provided in the past in which a TV camera is provided in the door phone slave unit, a monitor TV is provided in the master unit, and the video signal of the TV camera is multiplexed and transmitted from the door phone slave unit to the master unit. Yes. In this system, when the call button of the door phone slave unit is pressed, the TV camera is activated, and the video signal of the TV camera is sent to the master unit and displayed on the TV monitor of the master unit. The family member can respond after confirming the visitor on the monitor TV image.

  However, even in this intercom system, when a ringing tone is output in response to a call from a door phone handset, a visitor in the house goes to the installation location of the main unit and does not check the video on the monitor TV. Even if a householder who cannot identify who the person is and does not need to check with the video on the monitor TV returns home, the housekeeper checks the video on the monitor TV and then picks up at the entrance. There was a problem, and the housekeeper who came home was kept waiting at the entrance until the housekeeper confirmed it on the monitor TV.

Therefore, as shown in FIG. 11B, a call signal is sent from the doorphone sub unit B to the base unit A in response to the pressing of the call button (S10), and the base unit A receives the call signal and the base unit A receives the call signal. When the ringing tone is output from the speaker of the door phone sub-unit B (S11), the state is shifted to the paging state (S12), the call button once released is pressed down again and continuously pressed. A signal in which a calling signal is superimposed on the blanking portion of the video signal is continuously sent to the parent device A (S13), and when the parent device A detects that the calling button has been pressed for a predetermined time or more, The operation of A causes the sound of the doorphone slave unit B to be amplified from the speaker of the master unit A, and the call button is pressed to a reception state (S14) in which the sound of the master unit A side is not output from the doorphone slave unit B side. Switches while the call is on and the call button is released A system that returns to the calling state (S15) has also been proposed, and the voice of the housekeeper who has returned home with the parent device A switched to the receiving state speaks to the microphone of the door phone child unit B is amplified from the speaker of the parent device A. By doing this, you can let the housekeepers who are out of the house return home, and the trouble of checking whether the visitor is a housekeeper by going to the place where the housekeeper in the house is installed. It can be omitted (see, for example, Patent Document 1).
Japanese Patent No. 3497003

  In the intercom system described above, when the call button of the door phone slave unit B is pressed and held for a certain period of time, the master unit A switches to a receiving state in which the sound of the door phone slave unit B is amplified from the speaker. Talk to the microphone on device B to let the people in the home know that the house has returned, but the housekeeper who has returned home will switch to the receiving state and continue talking to the microphone There is a problem that it is necessary to keep pressing the call button, and it takes time and effort to keep pressing the call button.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an interphone system that saves the trouble of pressing the call button in order to switch the master side to the receiving state. .

In order to achieve the above object, the invention of claim 1 is to form a communication path between a doorphone slave installed outside the house and a doorphone slave installed in the house in response to a call from the doorphone slave. And a main unit that communicates with the intercom unit via the communication path. The intercom unit includes a speaker and a microphone for calling, a call button for calling the main unit, and the call button. And a call signal sending means for sending a call signal to the parent machine when the button is pressed. The parent machine has a speaker and a microphone for calling, and a call signal detecting means for detecting a call signal sent from the door phone slave unit. When the call button for responding to the call from the door phone slave unit and the call signal detecting means detects the call signal, the ring tone is emitted from the speaker on the base unit side and the door phone slave unit side, and the call state is entered. In call state Control means for forming a communication path with the intercom unit when the button is pressed, and the call signal sending means receives the call signal again when the call button is pressed for a predetermined time and then released. When the call signal detection means detects the call signal again in the call state, the control means forms a communication path with the door phone slave unit and plays the sound collected by the microphone of the door phone slave unit. It is characterized in that it is in a receiving state in which the sound is loudened from a speaker of the machine, and the predetermined time is set to a time within a time width for outputting the ringing tone .

According to a second aspect of the present invention, a communication path is formed between a doorphone slave installed outside the house and a doorphone slave installed in the house in response to a call from the doorphone slave, and the doorphone is connected via the communication path. The door phone handset includes a speaker and a microphone for calling, a call button for calling the parent device side, and a call button to the parent device when the call button is pressed. A call signal sending means for sending one call signal, and the master unit includes a speaker and a microphone for calling, a call signal detecting means for detecting a call signal sent from the door phone slave unit, and a door phone slave unit. When the call button for responding to the call and the call signal detecting means detect the first call signal, the ringing sound is emitted from the speaker on the base unit side and the door phone handset side, and the call state is entered. The call button is pressed at Control means for forming a communication path with the intercom handset, and the call signal sending means is a second different from the first call signal when the call button is continuously pressed for a predetermined time and then released. When the call signal detecting means detects the second call signal in the calling state, the control means forms a communication path with the door phone slave unit and uses the microphone of the door phone slave unit. The collected sound is set to a reception state in which the sound of the collected sound is amplified from the speaker of the master unit, and the predetermined time is set to a time within a time width for outputting the ringing sound .

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the call signal sent from the call signal sending means to the master unit is a voltage signal.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the call signal detecting means detects the call signal from the door phone slave unit until a predetermined time elapses after the call signal is detected. The detection process is stopped.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the control means forms a communication path with the door phone slave unit when the call signal detecting means detects the call signal in the call state. It is characterized by being in a receiving state only for a certain time.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, when the calling signal detecting means detects the calling signal in the calling state, the control means notifies at least different from the ringing sound from the speaker of the master unit. It is characterized by sounding.

According to the first aspect of the present invention, when the call button of the door phone handset is pressed, the call signal sending means sends the call signal to the parent device, and the control means of the parent device shifts to the calling state in response to the call signal. Then, when the call button is continuously pressed for a predetermined time and then released, the call signal sending means sends the call signal again to the parent machine, and the control means of the parent machine detects the call signal detecting means in the calling state. When a call signal is detected again, a call path is formed between the doorphone slave unit and the sound from the doorphone slave unit is amplified from the speaker on the master unit side. Since the voice spoken to the microphone of the door phone slave unit is amplified from the speaker of the master unit, it is easy for a householder in the house to confirm that the visitor is a homemaker without going to the location of the master unit and responding And the housekeeper who came home was a door phone If you press and hold the call button for a predetermined time, you can set the master unit to the receiving state and let the voice in the microphone of the doorphone slave unit be heard by the person in the house, so the microphone of the door phone slave unit like the conventional interphone system Thus, it is possible to save the trouble of holding down the call button while speaking to the user and improve usability. Moreover, since the predetermined time is within the time range for outputting the ringing tone, if the call button is kept pressed until the ringing tone ends, the base unit can be switched to the receiving state. It is easy to understand the timing of releasing the button.

According to the second aspect of the present invention, when the call button of the door phone handset is pressed, the call signal sending means sends the first call signal to the parent device, and receives the first call signal to control the parent device. The means has shifted to the calling state, and when the calling button is continuously pressed for a predetermined time and then released, the calling signal sending means sends the second calling signal to the parent machine, and the control means of the parent machine When the call signal detecting means detects the second call signal in the call state, a call path is formed with the doorphone slave unit, and the reception state in which the sound from the doorphone slave unit is amplified from the speaker on the master unit side is set. Because the voice that the visitor talks to the microphone of the doorphone handset in this receiving state is amplified from the speaker of the master unit, the housekeeper in the house goes to the place where the master unit of the master unit is installed and does not respond Can easily confirm that the visitor is a homemaker, and If the housekeeper keeps pressing the call button of the door phone slave unit for a predetermined time, the master unit can be in a receiving state, and the voice spoken to the microphone of the door phone slave unit can be heard by the in-house person, so that the conventional interphone system In addition, it is possible to save the trouble of holding down the call button while talking to the microphone, and the usability can be improved. Further, when the call signal detection means detects the second call signal in the call state, the control means of the master unit forms a communication path with the door phone slave unit and is in the reception state, and once releases the call button, If it is pressed again after the predetermined time has elapsed, the first call signal is sent twice, so this operation does not switch to the reception state, and only when the call button is continuously pressed for a predetermined time State. Moreover, since the predetermined time is within the time range for outputting the ringing tone, if the call button is kept pressed until the ringing tone ends, the base unit can be switched to the receiving state. It is easy to understand the timing of releasing the button.

  According to the third aspect of the present invention, since the call signal sent from the call signal sending means to the master unit is a voltage signal, the door phone slave unit and the circuit for modulating or demodulating the call signal are not required in the master phone unit. The configuration of the signal transmission circuit and the reception circuit can be simplified to reduce the cost.

According to the invention of claim 4 , the call signal detection means stops the call signal detection process until a predetermined time elapses after detecting the call signal from the door phone slave unit. It is possible to prevent erroneous detection of noise or the like as a call signal before the time elapses.

Also, if the reception state continues for a long time when switching to the reception state by continuously pressing the call button, if the ambient noise outside the house is large, the ambient noise will continue to be output from the speaker of the master unit, Although it feels uncomfortable, according to the invention of claim 5 , since it is in the receiving state only for a certain period of time, external noise can be generated even during an unnecessary period by setting the receiving state only for a certain period necessary for the housekeeper to return home. Can be prevented from being continuously output from the speaker of the master unit.

According to the invention of claim 6 , when the call signal detection means detects the call signal in the call state, the control means sounds at least a notification sound different from the call sound from the speaker of the master unit. By sounding a different notification sound, you can confirm that the call button has been pressed and held for a predetermined time or more, and the person who is in the house knows this function even if the person who came home does not talk to the microphone of the door phone slave unit It can be determined that the householder has come home.

  Embodiments of the present invention will be described below with reference to the drawings.

(Basic configuration 1)
As shown in FIG. 2, the basic configuration of the intercom system according to the present invention is connected to the door phone sub-unit B via the door phone sub-unit B installed outside the home and the two signal lines Ls installed inside the home. It is comprised with the main | base station A, and an audio | voice signal and a video signal are each transmitted with the baseband transmission system and the frequency modulation system between the main | base station A and the door phone sub unit B.

  As shown in FIG. 1, base unit A has a voice input / output unit 1 including a microphone 2 and a speaker 3 for a call, a microphone amplifier 5 that amplifies a voice signal collected by the microphone 2, and a speaker 3. A speaker amplifier 6 that amplifies the output signal of the microphone, and an audio signal collected by the microphone amplifier 5 (send signal to the door phone slave unit B) and an output signal to the speaker 3 (receive signal from the door phone slave unit B) A voice processing unit 4 that switches between a transmission state and a reception state by passing a relatively high level signal by inserting a loss in a signal path of a relatively low level by comparing the signal levels of Is supplied to the doorphone sub-unit B via the signal line Ls, and the call detection unit 8 detects the paging signal transmitted from the doorphone sub-unit B via the signal line Ls. And base unit A and A notification sound generation unit 9 that generates a sound like a chime sound output from the speakers 3 and 23 of the door phone slave unit B, an amplifier 10 that amplifies the sound output signal generated by the notification sound generation unit 9, and a liquid crystal display Such a display unit 11, a video signal input via a multiplexing circuit unit 13 (to be described later), a video processing unit 12 that drives the display unit 11 to display video on the display unit 11, and a microphone amplifier 5 The transmission signal and the notification sound signal from the amplifier 10 are multiplexed and transmitted to the signal line Ls, and the reception signal and the video signal multiplexed and transmitted from the door phone sub-unit B are separated to obtain a speaker amplifier 6, respectively. The operation of the operation buttons such as the multiplexing circuit unit 13, the control unit 14, the call button 16 and the monitor button 17 that are output to the video processing unit 12 is monitored and the operation input of each button is output to the control unit 14. And an operation input section 15.

  The master unit A includes a container 18 made of a rectangular parallelepiped synthetic resin molded product. Inside the container 18, the voice input / output unit 1, voice processing unit 4, power feeding unit 7, call detection unit 8, notification The circuit components constituting the sound generation unit 9, the amplifier 10, the video processing unit 12, the multiplexing circuit unit 13, and the control unit 14 are accommodated, and the display unit 11, the call button 16, and the monitor button 17 are arranged on the front surface. .

  On the other hand, the door phone sub-unit B receives a voice input / output unit 21 including a microphone 22 and a speaker 23 for a call, a microphone amplifier 25 that amplifies a voice signal collected by the microphone 22, and an output signal to the speaker 23. A speaker amplifier 26 for amplifying is provided, and the signal level of the audio signal collected by the microphone amplifier 25 (sending signal to the main unit A) and the output signal to the speaker 23 (receiving signal from the main unit A) are compared. A voice processing unit 24 that switches between a transmission state and a reception state by passing a relatively high level signal by inserting a loss in a relatively low level signal path, and the line voltage of the signal line Ls to each part A power receiving unit 27 that converts the voltage into an operating voltage to be supplied, a camera unit 28 that captures a visitor using an image sensor such as a CCD, and a video signal output from the camera unit 28 to modulate a multiplex described later. A video processing unit 29 that outputs to the circuit unit 32, a call control unit 31 (calling signal sending means) that monitors the operation of the calling button 30 and generates a calling signal according to the operation input, and a transmission signal from the microphone amplifier 25 In addition, the video signal from the video processing unit 29 is multiplexed and transmitted to the signal line Ls, and the reception signal or sound output signal multiplexed and transmitted from the master unit A is separated from the video signal and output to the speaker amplifier 26. And a multiplexing circuit unit 32.

  The doorphone sub-unit B includes a container 34 made of a rectangular parallelepiped synthetic resin molded product. Inside the container 34, the voice input / output unit 21, voice processing unit 24, power receiving unit 27, video processing unit 29, call Circuit parts constituting the control unit 31 and the multiplexing circuit unit 32 are accommodated, and a camera unit 28 and a call button 30 are arranged on the front surface.

  The basic call operation of this system will be described below. The intercom sub-unit B operates by receiving power from the main unit A, and in a standby state where no paging operation or monitoring operation is performed, the power supply unit 7 of the main unit A to the call control unit 31 or the multiplexing circuit The minimum standby voltage V1 necessary for the operation of the unit 32 is supplied, and the operation is performed in the standby state.

  Then, when the call button 30 of the door phone child device B is operated by a visitor while the door phone child device B is operating in the standby state, the call control unit 31 detects the operation of the call button 30 and a call signal comprising a pulse signal. This call signal is sent to the base unit A via the multiplexing circuit unit 32. In base unit A, when call detection unit 8 detects a call signal input via multiplexing circuit unit 13, control unit 14 supplies voltage V <b> 2 (standby voltage V <b> 1) required for operation from power supply unit 7 to doorphone sub unit B. Higher than the operating voltage), and a ringing sound such as a chime sound is generated by the notification sound generation unit 9, and the generated ringing sound output signal is amplified by the speaker amplifier 6, and the speaker 3 of the parent device A is amplified. Is output to the home phone and is sent to the intercom unit B through the multiplexing circuit unit 32. Further, the control unit 14 operates in a call state until a predetermined call time elapses after the call signal is input.

  At this time, in the door phone sub-unit B, the power receiving unit 27 receives the voltage supply from the main unit A, supplies the operation voltage to each unit, starts the camera unit 28, and receives the video signal modulated by the video processing unit 29. While being sent to the base unit A through the multiplexing circuit unit 32, the ringing tone output signal input through the multiplexing circuit unit 32 is amplified by the speaker amplifier 26, and is also called from the speaker 23 of the door phone slave unit B. Sound is output. In the base unit A, the video signal from the door phone sub-unit B is input to the video processing unit 12 via the multiplexing circuit unit 13, and the video processing unit 12 demodulates the video signal to the display unit 11 at the camera unit 28. A captured image of the visitor is displayed.

  Thereafter, when the call button 16 of the parent device A is pressed by a housekeeper in the calling state, an operation signal of the call button 16 is input to the control unit 14 via the operation input unit 15, and the control unit 14 receives the doorphone slave unit B. Is formed so that a voice call can be made with the doorphone slave unit B.

  If the call button 16 of the main unit A is not pressed in the calling state, the control unit 14 ends the calling state after the calling time has elapsed, and sets the voltage supplied from the power supply unit 7 to the door phone sub unit B. The voltage is switched to the standby voltage V1, and the door phone slave unit B is operated in the standby state.

  When the monitor button 17 of the parent device A is pressed by a housekeeper in the standby state, the operation input unit 15 detects the operation of the monitor button 17 and outputs an operation input to the control unit 14. When the operation signal of the monitor button 17 is input from the operation input unit 15, the control unit 14 controls the power supply unit 7 to supply the door phone slave unit B with the operating voltage V <b> 2. At this time, the doorphone sub-unit B receives the supply of the operating voltage from the main unit A, activates the camera unit 28, modulates the video signal of the camera unit 28 by the video processing unit 29, and sets the multiplexing circuit unit 32. To the base unit A. And in the main | base station A, since the video signal sent out from the door phone subunit | mobile_unit B is isolate | separated by the multiplexing circuit part 13, and it demodulates in the video process part 12, and displays on the display part 11, the householder in a house is a doorphone. An image captured by the camera unit 28 of the slave unit B can be monitored by the display unit 11.

  Next, the return home notification function which is a characteristic function of this system will be described with reference to FIGS. When a visitor (i.e., a returning home person) makes a home return notification and presses and holds the call button 30 of the door phone sub unit B at time t1, the call control unit 31 detects an operation of the call button 30 and a call signal comprising a pulse signal. a is generated, and the calling signal a is multiplexed by the multiplexing circuit unit 32 and sent to the base unit A via the signal line Ls (S1). In the base unit A, when the call detection unit 8 detects the call signal a input via the multiplexing circuit unit 13, the detection signal is output to the control unit 14, and the control unit 14 responds to this detection signal. 7 to increase the supply voltage to the door phone slave unit B from the standby voltage V1 to the operating voltage V2, and to generate a ringing tone such as a chime by the notification sound generation unit 9, and this ringing tone is used as the base unit A. And it outputs from the speakers 3 and 23 of the door phone sub-unit B (S2), and operates in the calling state until a predetermined calling time elapses (S3). At this time, in the door phone sub-unit B, the power receiving unit 27 receives the voltage supply from the main unit A, supplies the operation voltage to each unit, activates the camera unit 28, and the video signal of the camera unit 28 is transmitted by the video processing unit 29. Modulated and sent to the base unit A via the multiplexing circuit unit 32. In the main unit A, the video signal transmitted from the door phone sub unit B is separated by the multiplexing circuit unit 13, demodulated by the video processing unit 12, displayed on the display unit 11, and captured by the camera unit 28. The video of the visitor is displayed on the display unit 11 of the main unit A.

  When the visitor presses the call button 30 continuously for a predetermined time T1 shorter than the call time and then releases the call button 30, the call control unit 31 detects this operation and the time when the call button 30 is released. At t2, the call signal a is generated again, and this call signal a is sent to the base unit A through the multiplexing circuit unit 32 (S4). Here, when the call detection unit 8 detects the call signal a again in the call state, the control unit 14 of the base unit A controls the voice processing unit 4 to output the sound from the door phone sub unit B from the speaker 3. (S5). The control unit 14 operates the voice processing unit 4 in the receiving state until the predetermined calling time elapses after the call control unit 31 first detects the calling signal a, and returns in this receiving state. When the housekeeper speaks to the microphone 22 of the door phone sub-unit B, the sound collected by the microphone 22 is amplified from the speaker 3 of the main unit A, so that the housekeeper in the house returns home based on this sound. I can judge. Therefore, if the housekeeper who has returned home uses this return notification function, the housekeeper in the house can visually confirm the video displayed on the display unit 11 of the base unit A, or press the call button 16 to communicate with the doorphone slave unit B. Since it can be known that the housekeeper has returned home without making a call, it is possible to save the trouble of confirming the visitor, and the housewife who has returned home does not have to wait for a long time at the entrance, improving usability. Further, if the housekeeper who has returned home continues to press the call button 30 of the doorphone slave unit B for a predetermined time T1, after the release button 30 is released, the master unit A switches to the receiving state, and the voice spoken to the microphone 22 of the doorphone slave unit B is heard. Since it can be heard by a householder in the house, it is possible to save the trouble of pressing the call button 30 while speaking to the microphone 22 as in the conventional interphone system, and the usability is further improved.

(Basic configuration 2)
A basic configuration 2 of the intercom system according to the present invention will be described with reference to FIGS. Note Since configuration of intercom systems is similar to the basic configuration 1, the common components are denoted by the same reference numerals, and illustration and description thereof will be omitted.

In the basic configuration 1 described above, when the call button 30 is pressed for a predetermined time T1 or longer and then released, the call control unit 31 detects this operation and generates the call signal a again. The control unit 14 of the parent device A switches to the receiving state when the call signal a is input again in the calling state. Therefore, even if the visitor once releases the call button 30 and presses it again after the predetermined time T1, the call signal a is sent out twice at the predetermined time T1. There is a possibility that the control unit 14 switches to the reception state.

Therefore, in the present system, in the operation at the time of the return notification described in the basic configuration 1 , when the call button 30 is pressed for a predetermined time T1 or longer and then released as shown in FIGS. Is detected, and when the call button 30 is released, another call signal b (second call signal) different from the call signal a (first call signal) is generated, and the call signal b is multiplexed. While being sent to the base unit A via the circuit unit 32 (S4 ′ in FIG. 5), when the control unit 14 of the base unit A detects the call signal b in the call state, the voice detection unit 4 It is controlled and switched to the receiving state. When the call button 30 is pressed for a predetermined time T1 or longer and then released, the call control unit 31 sends a call signal b that is different from the call signal a, and the control unit of the main unit A receives the call signal b. Since the operation is the same as the operation at the time of the return home notification described in the basic configuration 1 except for the point of shifting to, the description thereof is omitted.

  As described above, the control unit 14 of the base unit A receives the call signal b different from the call signal a input at the time of the call (time t1) and switches to the receiving state. Even if the call signal a is input twice after the predetermined time T1 as if the button was pressed again after the predetermined time T1, the main unit A does not switch to the receiving state, and the call button 30 remains at the predetermined time. Only when it is continuously pressed for T1 or more, it can be surely set to the receiving state.

(Basic configuration 3)
A basic configuration 3 of the intercom system according to the present invention will be described with reference to FIGS. Note Since configuration of intercom systems is similar to the basic configuration 1, the common components are denoted by the same reference numerals, and illustration and description thereof will be omitted.

In the basic configuration 1 described above, the call control unit 31 generates the call signal a composed of a pulse signal, whereas in the present system , the call control unit 31 includes a voltage signal as shown in FIG. A call signal a is generated, and the call signal a is transmitted to the base unit A via the multiplexing circuit unit 32. The call detection unit 8 of the base unit A detects the fall of the line voltage of the signal line Ls. Thus, the input of the calling signal a is detected.

  Since the call control unit 31 and the call detection unit 8 transmit or receive the call signal a composed of a voltage signal in this way, the call control unit 31 and the call detection unit 8 transmit or receive the call signal a composed of a pulse signal. Compared with the case where it does, the circuit structure of the call control part 31 and the call detection part 8 can be simplified, the number of parts of a circuit component can be reduced, and manufacturing cost can be reduced.

In the basic configuration 2 described above, it is needless to say that the call control unit 31 may generate call signals a and b made up of voltage signals. For example, as shown in FIG. The unit 8 detects the input of the call signal a by detecting the fall of the line voltage of the signal line Ls in the standby state, and then detects the rise of the line voltage of the signal line Ls in the call state. May be detected.

  Also in this case, since the control unit 14 of the main unit A receives the call signal b different from the call signal a and switches to the reception state, the call button 30 is once released and then pressed again after a predetermined time T1. Even if the call signal a is input twice at a predetermined time T1, the main unit A does not switch to the receiving state, and only when the call button 30 is continuously pressed for the predetermined time T1 or more. State.

(Embodiment 1 )
The first embodiment of the present invention will be described with reference to FIG. Since the basic configuration of the intercom system is the same as that of the basic configuration 1 , common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

In the intercom system of this embodiment, as in the basic configuration 2 described above, when the call button 30 is pressed for a predetermined time T1 or longer and then released, the call control unit 31 detects this operation and the call button 30 is released. In this embodiment, the predetermined time T1 is set to a time within the time width for outputting the ringing tone (for example, approximately the same time as the time width for outputting the ringing tone). .

  FIG. 8 is an explanatory diagram for explaining the operation at the time of home return notification. When a home person who returns home makes a home return notification, when the call button 30 of the door phone slave unit B is pressed and held, the call control unit 31 detects the operation of the call button 30. Then, a call signal a composed of a pulse signal is generated, and the call signal a is multiplexed by the multiplexing circuit unit 32 and sent to the base unit A via the signal line Ls (S1). In the base unit A, when the call detection unit 8 detects the call signal a input via the multiplexing circuit unit 13, the control unit 14 controls the power supply unit 7 to set the supply voltage to the door phone slave unit B to the standby voltage. In addition to increasing the operating voltage V2 from V1, the notification sound generation unit 9 generates a ringing sound C1 such as a chime sound, and outputs the ringing sound C1 from the speakers 3 and 23 of the main unit A and the door phone sub unit B ( S2). At this time, in the door phone sub-unit B, the power receiving unit 27 receives the voltage supply from the main unit A, supplies the operation voltage to each unit, activates the camera unit 28, and the video signal of the camera unit 28 is transmitted by the video processing unit 29. Modulated and sent to the base unit A via the multiplexing circuit unit 32. In the main unit A, the video signal transmitted from the door phone sub unit B is separated by the multiplexing circuit unit 13, demodulated by the video processing unit 12, displayed on the display unit 11, and captured by the camera unit 28. The video of the visitor is displayed on the display unit 11 of the main unit A.

  Then, when the caller 30 releases the call button 30 at the timing when the ringer C1 finishes ringing, the call control unit 31 detects this operation, and the call signal b different from the call signal a when the call button 30 is released. The call signal a is sent to the base unit A through the multiplexing circuit unit 32 (S4 ′). Here, when the call detection unit 8 detects the call signal b in the calling state, the control unit 14 of the base unit A causes the notification sound generation unit 9 to generate a notification sound C2 such as a chime sound, and this notification sound C2 is generated. While outputting from the speaker 3 and 23 of the main | base station A and the door phone subunit | mobile_unit B (S6), the audio | voice process part 4 is controlled and it is set as the receiving state which outputs the sound from the doorphone subunit | mobile_unit B side from the speaker 3 (S5). ). The control unit 14 operates the voice processing unit 4 in the receiving state until the predetermined calling time elapses after the call control unit 31 first detects the calling signal a, and returns in this receiving state. When the housekeeper speaks to the microphone 22 of the door phone sub-unit B, the sound collected by the microphone 22 is amplified from the speaker 3 of the main unit A, so that the housekeeper in the house returns home based on this sound. I can judge.

  As described above, in the present embodiment, since the predetermined time T1 is set to be approximately the same as the time width for outputting the ringing tone, the call button 30 is continuously pressed until the ringing tone C1 has been ringed, If the button 30 is released, the parent device A can be switched to the receiving state, and it becomes easy to understand the timing when the housekeeper who has returned home releases the call button 30, thereby improving usability. In the present embodiment, when the call detection unit 8 of the parent device A detects the call signal b and generates a detection signal, the control unit 14 receives the detection signal and the notification sound generation unit 9 differs from the call sound C1. Since the notification sound C2 is generated and output from the speakers 3 and 23 of the main unit A and the door phone sub unit B, the call button 30 is operated by the notification sound C2 that the main unit A has been switched to the receiving state. You can let the housekeeper know.

In the present embodiment, the predetermined time T1 is set to be approximately the same as the time width for outputting the ringing tone in the basic configuration 2 described above, but the time for outputting the predetermined time T1 in the other basic configuration is also set. Needless to say, the time may be set within the range.

(Embodiment 2 )
The second embodiment of the present invention will be described with reference to FIG. Note Since configuration of intercom systems is similar to the basic configuration 1, the common components are denoted by the same reference numerals, and illustration and description thereof will be omitted.

The operation at the time of return notification in the present embodiment is substantially the same as the operation in the first embodiment described above. When the call button 30 is pressed and released at the timing when the ringing tone ends, the doorphone sub unit B changes to the main unit A. paging signal b is sent, receives this call signal b, but the control unit 14 of the master unit a is to switch to listen state and controls the audio processing unit 4, first paging signal a in embodiment 1 is input In the present embodiment, it is switched to the reception state for a certain time T2 as shown in FIG. 9 (S5). After the elapse of T2, it is operated in the calling state until the calling time elapses (S7). Note that the notification of returning home described in the first embodiment is provided except that the base unit A receives the call signal b and switches to the reception state for a predetermined time and does not output the notification sound C2 when switching to the reception state. Since it is the same as the operation of the function, the general operation description is omitted.

  Here, when switching to the reception state by continuously pressing the call button 30, if the reception state is kept until the end of the calling period, the ambient noise is output from the speaker of the main unit when the ambient noise outside the house is large. The person in the house feels uncomfortable because it continues to be used, but as described above, it is in the receiving state only for a certain period of time and is returned to the calling state after a certain period of time. By setting the reception state, it is possible to prevent external noise from being continuously output from the speaker 3 of the main unit A during an unnecessary period.

In the present embodiment, when the call button 30 is pressed and held for a predetermined time T1 or longer in the basic configuration 2 described above, the parent device A is switched to the reception state for a predetermined time. However, in the other embodiments and other basic configurations , the reception state Needless to say, the period of time may be a fixed time.

(Basic configuration 4)
A basic configuration 4 of the intercom system according to the present invention will be described with reference to FIG. Note Since configuration of intercom systems is similar to the basic configuration 1, the common components are denoted by the same reference numerals, and illustration and description thereof will be omitted.

FIG. 10 shows the operation at the time of home return notification of this system . The operation at the time of home return notification of this system is substantially the same as the operation of the basic configuration 2 described above. When the call button 30 is pressed for a predetermined time T1 and then released, the call signal b is sent from the doorphone sub unit B to the base unit A. In response to this call signal b, the control unit 14 of the base unit A controls the voice processing unit 4 to switch to the reception state. In the present system , the control unit 14 switches to the reception state in the operation shown in FIG. Before, the control unit 14 of the base unit A causes the notification sound generation unit 9 to generate a notification sound output signal of the notification sound C2 that is different from the ringing tone C1, and amplifies the notification sound output signal by the speaker amplifier 6 so that the base unit A The speaker 3 outputs the notification sound C2 and sends it to the signal line Ls through the multiplexing circuit unit 13, and the doorphone sub-unit B separates the notification sound signal by the multiplexing circuit unit 32 so that the speaker amplifier 6 is output, it is amplified by speaker amplifier 26 and to output a notification sound C2 from the speaker 23 (S6 in FIG. 10). In the basic configuration 2 , the system is operated in the receiving state from the first input of the call signal a until the elapse of the calling time, whereas in the present system , the system is switched to the receiving state for a certain time T2. (S5) After the fixed time T2, the operation is continued in the calling state until the calling time elapses (S7).

As described above, in this system , when the control unit 14 of the main unit A switches to the reception state, the notification sound C2 different from the ringing sound C1 that is output first at the time of calling is transmitted to the main unit A and the intercom unit B. Since the signals are output from the speakers 3 and 23, the householder in the house can be informed that the householder who knows the above-mentioned return notification function has pressed the call button 30 for a long time. Without visually confirming the video on the display unit 11 or making a call with the door phone sub-unit B, it is possible to determine that the visitor is a householder and immediately pick up at the entrance. In addition, since the housekeeper who has pressed the call button 30 for a predetermined time can surely know that the master unit A has been switched to the receiving state, the usability is improved.

In this system , when the call button 30 is pressed for a predetermined time T1 or longer in the basic configuration 2 described above, the notification sound C2 different from the ringing sound C1 is output from the speakers 3 and 23 of the main unit A and the door phone sub unit B, and Although the parent device A is switched to the receiving state, in the other embodiments and basic configurations described above, the ringing tone C1 is different from the speakers 3 and 23 of the parent device A and the door phone sub unit B when switching to the receiving state. The notification sound C2 may be output.

Further, in each of the above-described embodiments and basic configurations , the call control unit 31 of the base unit A stops the call signal detection process from when the call signal a is first detected until the predetermined time T1 elapses. In this case, it is possible to prevent erroneous operation by erroneously detecting noise or the like as a call signal.

It is a block diagram of the intercom system of basic composition 1. It is a schematic block diagram same as the above. It is explanatory drawing explaining the operation | movement at the time of a return notice same as the above. It is a wave form diagram which shows the line voltage of a signal line same as the above. It is explanatory drawing explaining the operation | movement at the time of a homecoming notification of the basic composition 2. FIG. It is a wave form diagram which shows the line voltage of a signal line same as the above. The operation at the time of home return notification in basic configuration 3 is shown, and (a) and (b) are waveform diagrams of the line voltage of the signal line. FIG. 6 is an explanatory diagram for explaining an operation at the time of homecoming notification according to the first embodiment. FIG. 11 is an explanatory diagram for explaining an operation at the time of a return home notification according to the second embodiment. It is explanatory drawing explaining the operation | movement at the time of the homecoming notification of the basic composition 4 . (A) (b) is explanatory drawing explaining the calling operation | movement of the conventional intercom system.

Explanation of symbols

A Master unit B Doorphone slave unit 3 Speaker 4 Audio processing unit 8 Call detection unit 14 Control unit 30 Call button 31 Call control unit

Claims (6)

A communication path is formed between the doorphone slave installed outside the house and the doorphone slave installed in the house in response to a call from the doorphone slave, and the doorphone slave via the call path. The intercom unit includes a speaker and a microphone for calling, a call button for calling the main unit, and a call signal to the base unit when the call button is pressed. And a call signal sending means for sending the call, and the base unit is a speaker and a microphone for calling, a call signal detecting means for detecting a call signal sent from the door phone slave, and a call from the door phone slave When a call button for answering and the call signal detecting means detects a call signal, a ringing tone is emitted from the speaker on the base unit side and the door phone handset side, and the call state is entered. Push Control means for forming a communication path with the intercom handset, and the call signal sending means sends the call signal again when the call button is continuously pressed for a predetermined time and then released. When the call signal detection means detects the call signal again in the call state, the control means forms a communication path with the door phone slave unit and collects it with the microphone of the door phone slave unit. An interphone system characterized in that the sound is set to a receiving state in which the sound is loudened from a speaker of the master unit, and the predetermined time is set to a time within a time width for outputting the ringing sound . A communication path is formed between the doorphone slave installed outside the house and the doorphone slave installed in the house in response to a call from the doorphone slave, and the doorphone slave via the call path. The intercom unit includes a speaker and a microphone for calling, a call button for calling the parent device side, and a first button to the parent device when the call button is pressed. A call signal sending means for sending a call signal, and the master unit includes a speaker and a microphone for calling, a call signal detecting means for detecting a call signal sent from the door phone slave, and a door phone slave When the call button for responding to the call and the call signal detecting means detects the first call signal, a ringing tone is emitted from the speaker on the base unit side and the door phone handset side, and the call state is entered. Previous in condition Control means for forming a communication path with the intercom handset when the call button is pressed, and the call signal sending means when the call button is continuously pressed for a predetermined time and then released, A second call signal different from the first call signal is sent to the master unit, and the control means detects the second call signal when the call signal detection means detects the second call signal in the call state. And a receiving state in which the sound collected by the microphone of the door phone slave unit is amplified from the speaker of the master unit, and the predetermined time is a time within a time width for outputting the ringing tone. Intercom system characterized by that.   3. The intercom system according to claim 1, wherein the call signal sent from the call signal sending means to the master unit is a voltage signal. The call signal detection means stops the detection process of the call signal from the door phone slave unit until the predetermined time elapses after the call signal is detected . The intercom system as described in any one. 2. The control unit according to claim 1, wherein when the calling signal detecting unit detects a calling signal in the calling state, the control unit forms a communication path with the door phone slave unit and is in a receiving state for a predetermined time. 5. The intercom system according to any one of 4. 6. The control unit according to claim 1 , wherein when the calling signal detecting unit detects a calling signal in the calling state, at least a notification sound different from the calling sound is generated from a speaker of the master unit. The intercom system as described in any one .

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