JP3684581B2 - Intercom device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an interphone device in which a plurality of sub-devices are connected to a common communication path to perform a call between the sub-devices, and more particularly to an interphone device that can effectively use a channel selection switch.
[0002]
[Prior art]
Conventionally, in an interphone device, there are a parent-child interphone device capable of making a call only between a parent device and a child device, and a mutual method capable of making a call not only between a parent device and a sub device but also between sub devices. .
[0003]
FIG. 12 is a block diagram showing such a conventional parent-child intercom apparatus.
[0004]
In FIG. 12, a plurality of slave units 911, 912... 91n are connected to one master unit 901 via individual lines 921, 922. The lines 921, 922,... 92n are two wires for voice and power.
[0005]
In such a conventional parent-child intercom apparatus, a call can be made between the parent device 901 and the plurality of child devices 911, 912... 91n via the individual lines 921, 922. 912... 91n has a drawback that it is not possible to communicate with each other.
[0006]
FIG. 13 is a block diagram showing a conventional intercom apparatus.
[0007]
In FIG. 13, reference numeral 950 is a common line composed of four wires common to the power source, voice, transmission, and common. Secondary machine 961, 962... Are connected in common. The base unit 951 rectifies the commercial AC voltage supplied from the outlet 952 and passes through the power supply wiring of the common line 950. Secondary machine 961, 962...
In such a conventional intercom device, a plurality of master units 951 and a plurality of interphone devices are connected via a common line 950. Secondary machine Calls between 961, 962, etc. are possible, Secondary machine 961, 962... Allows communicative calls. However, in such a mutual intercom apparatus, a dip switch is provided for all of the master unit and the plurality of sub units in order to identify the master unit and the plurality of sub units at the time of calling. Although the self-address of the machine is set, since there are a large number of DIP switches, it takes time to operate for unaccustomed users. In response to this, a rotary switch type has been developed, but this is too expensive. The DIP switch and rotary switch for setting the self-address are provided on the back side of the main unit and multiple sub units. Take the wall There is a problem that the self-address cannot be changed when fixed.
[0008]
[Problems to be solved by the invention]
In order to identify the master unit and the plurality of sub-devices, the conventional mutual intercom apparatus described above is provided with a dip switch and a rotary switch for all of the master unit and the plurality of sub-devices, and the master unit and the plurality of sub-devices. Although the self-address is set, this is inconvenient because it complicates the operation and does not cost much, and the self-address can be changed when a base unit or multiple sub-units are attached and fixed. There is a problem of disappearing.
[0009]
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an intercom apparatus that eliminates the above-described problems and enables a channel selection switch to be used for settings other than channel selection.
[0010]
[Means for Solving the Problems]
The interphone device of the present invention is an interphone device capable of making a call between a base unit commonly connected to a common wiring and a plurality of sub units, and is provided in each of the base unit and the plurality of sub units, according to an operation procedure. Selection of the call address of the other party and whether it is conference call mode or secret call mode The machine A channel selection switch for selecting a speech mode, a transmission means for transmitting a call address to the common wiring by the operation procedure of the channel selection switch, and an operation procedure for the channel selection switch, respectively. Select your aircraft Call mode setting means for switching the selected call mode for setting, storage means provided in the master unit for storing the mode set by the call mode setting means for each of the plurality of sub machines, and the storage means And a control means for controlling the plurality of sub-machines based on the mode stored in the apparatus.
[0011]
[Action]
According to such a configuration, depending on the operation procedure of the channel selection switch, the selection of the other party and whether it is a conference call or a secret call The machine Talk mode can be selected. That is, when the call mode setting means operates the channel selection switch, Through your machine Since the talk mode is set, the channel selection switch can be used for setting modes other than channel selection.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
FIG. 1 is a block diagram showing an embodiment of an intercom apparatus according to the present invention.
[0014]
In FIG. 1, reference numeral 10 denotes a common line composed of four wires, that is, a power wire 11, an audio wire 12, a transmission wire 13, and a common wire 14, and the power wire 11 and the sound wire 12 of the common line 10 are The output terminal pair of the power supply unit 21 is connected. The power supply unit 21 rectifies the AC voltage of AC 100 V from the AC power source 22 and generates a DC voltage of 12 V between the power wiring 11 and the audio wiring 12.
[0015]
The power supply wiring 11, the audio wiring 12, the transmission wiring 13, and the common wiring 14 of the common line 10 are connected to a plurality of sub machines 31, 32.
[0016]
.. Are provided with a handset 40 and channel selection switches 41, 42... 45 from No. 1 to No. 5 on the front side, and a non-volatile memory 46 for storing a self address therein. The sub-devices 31, 32,... Can set their own addresses and store them in the nonvolatile memory 46 by operating the channel selection switches 41, 42,.
[0017]
FIG. 2 is a block diagram showing the auxiliary machine 31 of FIG. 1 in more detail.
[0018]
Input terminals 51, 52, 53 and 54 of the sub machine 31 are connected to the power supply wiring 11, the audio wiring 12, the transmission wiring 13 and the common wiring 14, respectively.
[0019]
The input terminal 51 is connected to a power supply circuit 61 provided in the sub machine 31.
[0020]
The power supply circuit 61 steps down the DC voltage of 12V from the power supply wiring 11 to create a DC voltage of 5V to be applied to one end of the nonvolatile memory 46, the transmission interface 62, the control circuit 63, and the resistors R1, R2,. Supply.
[0021]
The input terminal 52 is connected to a counterpart hook detection circuit 64 provided inside the sub machine 31 and is connected to one end of the switch 65. The other end of the switch 65 is connected to the first input terminal A 1 of the changeover switch 67 through the amplifier 66.
[0022]
A microphone 68 provided in the handset 40 of FIG. 1 is connected to the other end of the switch 65 via an amplifier 66.
[0023]
The counterpart hook detection circuit 64 detects whether the handset of the secondary device that is the other party of the call is hooked by detecting the voltage of the voice wiring 12, and creates a counterpart hook detection signal a1 indicating the detection result. To the control circuit 63.
[0024]
The input terminal 53 is connected to a transmission interface 62 provided in the sub machine 31.
[0025]
The transmission interface 62 creates a data signal b1 from a transmission signal indicating a calling address designated by another sub-device from the transmission line 13, supplies the data signal b1 to the control circuit 63, and receives a calling address from the data signal c1 from the control circuit. The transmission signal shown is created and guided to the output terminal 53.
[0026]
The input terminal 54 is connected to the reference potential point of the sub machine 31.
[0027]
The other ends of the resistors R1, R2, R3, R4, and R5 are connected to one ends of channel selection switches 41, 42, 43, 44, and 45, respectively, and first to fifth switch signal detections of the control circuit 63, respectively. Connected to the terminal. The other ends of the channel selection switches 41, 42, 43, 44, 45 are connected to a reference potential point.
[0028]
The reset terminal of the control circuit 63 is connected to the other end of the channel selection switch 45 through a series connection of anode cathode paths of the diodes D1 and D2. A reset IC 68 is connected to the diode D1 in parallel. The reset IC 68 detects ON / OFF of the switch 45, creates a reset signal based on the detection result, and guides it to the reset terminal of the control circuit 63. Although not shown, such diodes D1 and D2 and reset IC 68 are also provided in the channel selection switches 41, 42, 43, and 44. The capacitors C1 and C2 and the crystal resonator 69 constitute a reference signal oscillator, and supply a reference signal serving as a reference for operation to the control circuit 63.
[0029]
The control circuit 63 detects on / off of the channel selection switches 41, 42, 43, 44, 45 by the first to fifth switch signal detection terminals, sets a self address based on the detection result, and sets the self address. The data signal e1 is supplied to the nonvolatile memory 46, the call address of the other party is set, the data signal c1 indicating the call address is created and supplied to the transmission interface 62.
[0030]
The nonvolatile memory 46 stores the self-address data indicated by the self-address data signal e1 from the control circuit 63 as a one-byte address, and stores the self-address data stored based on the read control of the control circuit 63 as a self-address data signal. This is supplied to the control circuit 63 as f1.
[0031]
When the read address indicated by the data signal b1 from the transmission interface 62 coincides with the self-address data signal f1 from the nonvolatile memory 46, the control circuit 63 creates the calling voice signal g1 and switches the changeover switch 67 through the amplifier 70. To the second input terminal A2.
[0032]
A common terminal C of the changeover switch 67 is connected to a speaker 71 provided in the handset 40 of FIG.
[0033]
The switches 47 and 65 and the changeover switch 67 are linked to the hook button of the handset. When the handset is hooked to the main body, the switches 47 and 65 are turned off and the changeover switch 67 is connected to the second input terminal A2. Select and connect to common terminal C. When the handset is not hooked, the switches 47 and 65 are turned on, and the changeover switch 67 selects the first input terminal A1 and connects it to the common terminal C.
[0034]
FIG. 3 is an explanatory diagram showing an address memory in the nonvolatile memory 46 of FIG.
[0035]
As shown in FIG. 3, the address memory 80 in the nonvolatile memory 46 includes a total of 8-bit storage units 81, 82... 88 including a 4-bit upper address and a 4-bit lower address.
[0036]
The upper address storage units 81, 82,... 84 store the second digit of the self address data indicated by the self address data signal e1, and the lower address storage units 81, 82,. The first digit of the self-address data shown is stored. Therefore, if the self-address data is No. 15, 15h (h indicates hexadecimal) is stored in the address memory 80.
[0037]
FIG. 4 is a flowchart showing the operation of such an embodiment.
[0038]
In FIG. 4, step S1 determines whether any one of the channel selection switches 41, 42, 43, 44 has been pressed, and any of the channel selection switches 41, 42, 43, 44 has been pressed. If not, the determination is no and the process is terminated. If any one of the channel selection switches 41, 42, 43, and 44 is pressed, the determination is yes and the process of step S2 is performed. Transition.
[0039]
Step S2 determines whether or not two of the channel selection switches 41, 42, 43, and 44 are pressed at the same time. If two switches are pressed at the same time, the determination becomes yes and step S2 is performed. The process proceeds to S3, and if the two channel selection switches are not pressed at the same time, the determination is no and the process proceeds to step S11. In step S3, it is determined whether or not the first and fourth channel selection switches 41 and 44 have been pressed, and determination is made if the first and fourth channel selection switches 41 and 44 have not been pressed. No, the process ends, and if the first and fourth channel selection switches 41 and 44 are pressed, the determination is yes, the address setting flag is set in step S4, and in step S5 The key counter of the control circuit 63 is cleared and the process is terminated. In step S2, if the two channel selection switches are not pressed at the same time, the determination is no and the process proceeds to step S11.
[0040]
Step S11 determines whether or not the address setting flag is set. If the address setting flag is not set, the determination is no and the channel selection switches 41, 42, and 43 are determined in step S21. , 44, 45 are detected, a call address of the other party is set, a data signal c1 indicating the call address is generated and supplied to the transmission interface 62, and the process is terminated.
[0041]
In step S12, it is determined whether or not the key counter of the control circuit 63 is 0. If the key counter is 0, the determination is yes and the number of the channel selection switch turned on in step S13 is stored. In step S14, 1 is added to the count value of the key counter, and the process ends. If the key counter is not 0 in step S12, the determination is no and the channel switch number turned on in step S22 is stored in the lower order of the address, the key counter is cleared in step S23, and in step S24. The address setting flag is cleared and the process ends.
[0042]
A specific operation by such processing will be described below.
[0043]
When setting the self address, first, the channel selection switches 41 and 44 of No. 1 and No. 4 are pressed, and the flow goes to Steps S1, S2, S3, S4, S5, the address setting flag is set, and the key counter is set. Cleared and waits for input of self address. Thereafter, the channel selection switch of the second digit of the self address to be stored (for example, the first address when the self address to be stored is 15) is pressed. As a result, steps S 1 → S 2 → S 11 → S 12 → S 13 → S 14 are performed, and the number of the selected channel selection switch is stored in the upper address of the nonvolatile memory 46. Thereafter, the tuning switch of the first digit number of the self address to be stored (for example, No. 5 when the self address to be stored is 15) is pressed. As a result, steps S1 → S2 → S11 → S12 → S22 → S23 → S24, and the number of the pressed channel selection switch is stored in the lower address of the nonvolatile memory 46. As a result, the self-address is stored in the nonvolatile memory 46.
[0044]
Remove the handset from the phone to call the other party. Thereby, the switches 47 and 65 are turned on, and the changeover switch 67 selects the first input terminal A1 and connects it to the common terminal C.
[0045]
Next, the channel selection switch of the second digit number is pressed for the calling address data of the other party. In this state, since the address setting flag is not set, the flow goes to steps S 1 → S 2 → S 11 → S 21, and the control circuit 63 creates the data signal c 1 based on the number of the selected channel selection switch and sends it to the transmission interface 62. Supply. The transmission interface 62 creates a transmission signal from the data signal c 1 from the control circuit 63 and guides it from the output terminal 53 to the transmission line 13. Next, the channel selection switch of the first digit number is pressed for the calling address data of the other party. As a result, the flow of steps S 1 → S 2 → S 11 → S 21 is established, and the control circuit 63 creates the data signal c 1 based on the number of the selected switch, and the transmission interface 62 uses the data signal c 1 from the control circuit 63. A transmission signal is created and guided from the output terminal 53 to the transmission line 13.
[0046]
When a handset of another sub-device is taken, the partner hook detection circuit 64 detects that the handset of the other sub-device is not hooked, and creates a partner hook detection signal a1 indicating the detection result. To the control circuit 63. As a result, the control circuit 63 causes the self-address data stored in the nonvolatile memory 46 to be read as the self-address data signal f1. When the read address data indicated by the data signal b1 from the transmission interface 62 coincides with the self-address data signal f1 from the nonvolatile memory 46, the control circuit 63 creates a calling voice signal and switches the amplifier 70. The signal is supplied to the speaker 71 via the switch 67. As a result, sound is output from the speaker 71. In this state, the handset of the sub machine 31 is removed from the main body. Accordingly, the switches 47 and 65 are turned on, and the changeover switch 67 selects the first input terminal A1 and connects it to the common terminal C. As a result, the microphone 68 and the speaker 71 are connected to the audio wiring 12 via the amplifier 66, and conversation with other sub-devices becomes possible.
[0047]
According to such an embodiment, the channel selection switches 41, 42,... 45 can also be used as switches for setting the self address, so that the manufacturing cost of the intercom device can be reduced and the setting of the self address is possible. The operability is improved.
[0048]
FIG. 5 is a block diagram of a sub-machine showing another embodiment of the intercom apparatus according to the present invention. The same components as those in the embodiment shown in FIG.
[0049]
In FIG. 5, the difference between the present embodiment is that a secret call is made by inserting a relay switch 90 between the input terminal 52 of the sub machine 101 and the switch 65, and turning this relay switch 90 on and off by the control circuit 93. And switching between conference calls. The switching information between the secret call and the conference call in this case is stored in the nonvolatile memory 46.
[0050]
FIG. 6 is a flowchart showing the operation at the time of setting the secret story of such an embodiment.
[0051]
In FIG. 6, step S31 determines whether or not two of the channel selection switches 41, 42, 43, and 44 have been pressed at the same time, and when the two channel selection switches have not been pressed at the same time. If the determination is no and the calling process is performed in step S32, the process ends. If two switches are pressed simultaneously, the determination is yes and the process proceeds to step S33.
[0052]
In step S33, it is determined whether or not the first and third channel selection switches 41 and 43 are pressed. If the first and third channel selection switches 41 and 43 are pressed, the determination is made. In step S34, the secret flag of the sub-device 101 is set and the process is terminated. If the first and third channel selection switches 41 and 43 are not pressed, the determination is no and step The process proceeds to S35.
[0053]
In step S35, it is determined whether or not the second and fourth channel selection switches 42 and 44 have been pressed. If the second and fourth channel selection switches 42 and 44 have been pressed, the determination is made. In step S36, the secret flag of the sub-device 101 is reset and the process is terminated. If the second and fourth channel selection switches 42 and 44 are not pressed, the determination is no and the process is completed. Exit.
[0054]
According to such an embodiment, the channel selection switches 41, 42,... 45 can be used also as switches for switching between a secret call and a conference call.
[0055]
All secret calls If the secret flag of all the secondary aircraft is set, A relay switch 90 is used for a device other than the sub-device that has called and called. A call cannot be made.
[0056]
When the secret story flags of all the sub-devices are reset, all the sub-devices are in a call state.
[0057]
FIG. 7 is a flowchart showing a first modification of the embodiment of FIG. 6, and shows the operation of the sub-device on the side that operates the channel selection switch. In this modification, the circuit diagram of FIG. 5 is used for the description.
[0058]
In FIG. 7, step S41 determines whether or not two of the channel selection switches 41, 42, 43, and 44 have been pressed at the same time, and when the two channel selection switches have not been pressed at the same time. If the determination is no and the calling process is performed in step S42, the process is terminated. If two switches are pressed simultaneously, the determination is yes and the process proceeds to step S43.
[0059]
In step S43, it is determined whether or not the first and third channel selection switches 41 and 43 have been pressed. If the first and third channel selection switches 41 and 43 have been pressed, the determination is made. In step S44, the secret flag of the sub-device 101 is set and the secret flag set signal for setting the secret flag to another sub-device is guided to the transmission line 13 via the transmission interface, and the processing is terminated. If the first and third channel selection switches 41 and 43 are not pressed, the determination is no and the process proceeds to step S45.
[0060]
Step S45 is the second and fourth channel selection switch 4 2 , 44 has been pressed, and if the second and fourth channel selection switches 42, 44 have been pressed, the determination becomes yes and the secret flag of the sub-device is set in step S46. Reset and other sub-machine via transmission interface of When the secret flag reset signal for resetting the secret flag is guided to the transmission line 13 and the processing is terminated, and the second and fourth channel selection switches 42 and 44 are not pressed, the determination is no. The process is terminated as it is.
[0061]
FIG. 8 is a flowchart showing the operation of the auxiliary device on the side that does not operate the channel selection switch of the modification of FIG.
[0062]
In FIG. 8, first, in step S <b> 51, the transmission interface 62 receives a signal from the transmission line 13, creates a data signal b <b> 1, and supplies it to the control circuit 93. Next, in step S52, the control circuit detects the data signal b1, thereby detecting whether or not the signal from the transmission line 13 is the local station call signal. In the case of the local station call signal, the control circuit calls the speaker 71 from the speaker 71 in step S55. Until the sound is output and the handset is removed and hooked up, the operation of step S56 is repeated. relay The switch 90 is turned on to end the process.
[0063]
If it is detected in step S52 that the control circuit is not a local station call signal, it is detected in step S53 whether or not it is a local station call signal. Is set, and if the secret flag is not set, the process proceeds to step S57, and if the secret flag is set, the process proceeds to step S59. relay The switch 90 is turned off to end the process.
[0064]
If it is determined in step S53 that it is not a call signal for another station, the secret is returned in step S54. Story flag Whether the signal is Story flag In the case of a chat signal, the secret flag is set in step S60 and the process is terminated. Story flag If it is not a dot signal, the process proceeds to step S61.
[0065]
In step S61, the signal from the transmission line 13 is a secret story. Fragly Whether it is a set signal or not Talking Fragly If it is not a set signal, the process is terminated and Talking Fragly If it is a set signal, the secret flag is reset in step S62 and the process is terminated.
[0066]
According to the modified examples of FIGS. 7 and 8, since the user can select the secret call and the conference call, it is very convenient for business use, and the channel selection switch is set for the secret call and the conference call. Therefore, the increase in manufacturing cost can be suppressed. Since the secret call and conference call of the remaining sub-devices can be set by operating one sub-device, there is also an effect that the setting work is easy.
[0067]
FIG. 9 is a flowchart showing a second modification of the embodiment of FIG. 6, and shows the operation of the sub-device on the side that operates the channel selection switch. In this modification, the circuit diagram of FIG. 5 is used for the description.
[0068]
FIG. 9 is a flowchart showing the operation of the sub-device that performs a call according to the second modification of the embodiment of FIG. 5, and the circuit diagram of the embodiment of FIG.
[0069]
In this embodiment, pressing the first and fifth channel selection switches 41 and 45 switches to the secret call mode. In the secret call mode, the call addresses 11h and 12h set by the channel switch are selected. ... By adding 80h to 55h and transmitting, other sub-devices are set for a secret call and a conference call.
[0070]
In FIG. 9, step S71 determines whether any one of the channel selection switches 41, 42, 43, 44 has been pressed, and any of the channel selection switches 41, 42, 43, 44 has been pressed. If not, the determination is no and the process is terminated. If any one of the channel selection switches 41, 42, 43, and 44 is pressed, the determination is yes and the process of step S72 is performed. Transition.
[0071]
In step S72, it is determined whether or not two of the channel selection switches 41, 42, 43, and 44 are pressed at the same time. If two switches are pressed at the same time, the determination becomes yes and step S72 is performed. The process proceeds to S73, and when the two channel selection switches are not pressed at the same time, the determination is no and the process proceeds to Step S80. In step S73, it is determined whether or not the first and fifth channel selection switches 41 and 45 have been pressed. If the first and fifth channel selection switches 41 and 45 have not been pressed, the determination is made. No, the process ends, and if the 1st and 5th channel selection switches 41 and 45 are pressed, the determination is yes, the secret call flag is set in step S74, and in step S75. The key counter of the control circuit 93 is cleared and the process is terminated. If the two channel selection switches are not pressed at the same time in step S72, the determination is no and the process moves to step S80.
[0072]
In step S80, it is determined whether or not the secret call flag is set. If the secret call flag is set, the determination is yes, the process proceeds to step S81, and the secret call flag is set. If not, the determination is no and the process moves to step S91.
[0073]
In step S81, it is determined whether or not the key counter of the control circuit 93 is 0. If the key counter is 0, the determination is yes and the number of the tuning switch turned on in step S82 is called. As a higher address, 1 is added to the count value of the key counter in step S83, and the process ends. If the key counter is not 0 in step S81, the determination is no and the channel selection switch number turned on in step S84 is set as the secret call lower address, the key counter is cleared in step S85, and step S86. In step S87, the secret call signal is output to the transmission interface 62. In step S87, the secret call flag is reset, and the process ends.
[0074]
In step S91, it is determined whether or not the key counter of the control circuit 93 is 0. If the key counter is 0, the determination is yes and the number of the channel selection switch turned on in step S92 is called. In step S93, 1 is added to the count value of the key counter, and the process ends. If the key counter is not 0 in step S91, the determination is no and the channel selection switch number turned on in step S94 is set as the calling lower address, the key counter is cleared in step S95, and in step S96. The call signal is output to the transmission interface and the process is terminated.
[0075]
FIG. 10 is a flowchart showing the operation of the auxiliary device on the side that does not operate the channel selection switch of the modification of FIG.
[0076]
In FIG. 10, first, in step S101, the control circuit detects whether or not the call signal is received by detecting the data signal b1, and if the call signal is not received, the process is terminated. Is received, the process proceeds to step S102.
[0077]
In step S102, the most significant bit of the call address by the call signal is masked. Thereafter, in step S103, the control circuit determines whether the call signal is addressed to the own station.
[0078]
If the control circuit 93 detects that it is a call signal for the own station in step S103, the ringing tone is output from the speaker 71 in step S104, and the operation of step S105 is performed until the handset is removed and hooked up. After repeatedly hooking up, in step S106 relay The switch 90 is turned on to end the process.
[0079]
When the control circuit 93 detects that it is not the local call signal in step S103, the control circuit determines in step S107 whether or not the most significant bit of the call address is 1.
[0080]
If the control circuit 93 detects in step S107 that the most significant bit of the call address is 1, in step S108 relay If the switch is turned off and the most significant bit of the calling address is not 1 in step S107, the control circuit in step S109 relay Turn on the switch.
[0081]
According to such an embodiment, since it is possible to select the secret call and conference call of all the sub-devices by the sub-device that performs the call, it is more convenient than the embodiment of FIG.
[0082]
FIG. 11 is a block diagram showing another embodiment of the intercom apparatus according to the present invention. The same components as those in the embodiment of FIG.
[0083]
11, the sub-units 231, 232... Select one of the conference call and the parent-child call by operating the channel selection switches 41, 42... 45, and data indicating this selection is stored in the nonvolatile memory 246. It can be memorized.
[0084]
As a setting method in this case, for example, if the third and fourth switch channel selection switches 43 and 44 are pressed simultaneously, a conference call is made, and if the third and fifth switch channel selection switches 43 and 45 are simultaneously pressed, a parent-child call is performed. It is trying to become.
[0085]
According to such an embodiment, since the selection of the conference call and the parent-child call can be set by the channel selection switch, it becomes very convenient.
[0086]
In the embodiment shown in FIG. 9, the secret address and conference call are set for the other sub-device by adding 80h to the call address set by the channel selection switch and transmitting it. May be configured to use data other than 80h. In the embodiment shown in FIGS. 1 to 11, the nonvolatile memory is used as means for storing the data set by the channel selection switch, but a normal memory may be used.
[0087]
【The invention's effect】
As described above, according to the present invention, since the channel selection switch can be used for setting modes other than channel selection, it is possible to reduce the manufacturing cost of the intercom device and also the operability of settings other than channel selection. improves.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of an intercom apparatus according to the present invention.
FIG. 2 is a block diagram showing the sub-machine of FIG. 1 in more detail.
FIG. 3 is an explanatory diagram showing an address memory in the nonvolatile memory of FIG. 1;
4 is a circuit diagram for explaining the operation of the embodiment of FIG. 1;
FIG. 5 is a block diagram of an auxiliary device showing another embodiment of the intercom apparatus.
6 is a flowchart showing an operation at the time of secret story setting in the embodiment of FIG. 5;
FIG. 7 is a flowchart showing the operation of the auxiliary device on the side performing the operation of the channel selection switch of the first modification of the embodiment of FIG. 6;
FIG. 8 is a flowchart showing the operation of the auxiliary device on the side that does not operate the channel selection switch of the modification of FIG. 7;
FIG. 9 is a flowchart showing the operation of the auxiliary device on the side performing the operation of the channel selection switch of the second modification of the embodiment of FIG. 6;
FIG. 10 is a flowchart showing the operation of the auxiliary device on the side that does not operate the channel selection switch according to the modification of FIG. 9;
FIG. 11 is a block diagram showing another embodiment of the intercom apparatus according to the present invention.
FIG. 12 is a block diagram showing a conventional parent-child intercom apparatus.
FIG. 13 is a block diagram showing a conventional intercom device.
[Explanation of symbols]
10 Common line
11 Power supply wiring
12 Audio wiring
13 Transmission wiring
14 Common wiring
31, 32 Secondary machine
41, 42 ... 45 Tuning switch
46 Nonvolatile memory

Claims (4)

An intercom device capable of calling between a master unit and a plurality of sub-units commonly connected to a common wiring,
Respectively provided on the base unit and a plurality of sub-machine, select the call address of the call by the operation procedure opponent, and a channel selection switch for selecting a passing story mode for the conference call mode or privacy call mode or of its own,
Transmission means for transmitting a call address to the common wiring according to the operation procedure of the channel selection switch,
A communication mode setting means for setting and switching the selected been calling mode of its own Ri by the operation procedure of the channel selection switch,
A storage unit that is provided in the base unit and stores a mode set by a call mode setting unit of each of the plurality of sub units;
An intercom apparatus comprising: control means for controlling the plurality of sub-devices based on a mode stored in the storage means. An intercom device capable of calling between a plurality of sub-machines connected in common to a common wiring,
Respectively provided in a plurality of sub-machine, select the call address of the call by the operation procedure opponent, and a channel selection switch for selecting a passing story mode for the conference call mode or privacy call mode or of its own,
Wherein the plurality of respectively provided auxiliary machine, when a privacy call mode by operating the channel selection switch is selected, the own apparatus via the common wiring as privacy call signal by adding a constant value to the call address of the other party selected and transmitting means for sending to all sub-machine other than,
A storage unit that is provided in each of the plurality of sub-devices and stores a self-address;
Respectively provided on the plurality of sub-machine, when said storage means invocation address from privacy call signal sent through the common line and self-address stored obtained by subtracting the predetermined value coincide with each other Voice output means for outputting a ringing tone;
Respectively provided on the plurality of sub-machine, the state receiving the privacy call signal, when said self-address and the calling address matches after the ring tone output, the self to passing talk state set the secondary machine, the self interphone device characterized by comprising setting means for setting its own sub-machine to call disable state, the if himself address and said call address does not match. An intercom device capable of calling between a plurality of sub-machines connected in common to a common wiring,
Respectively provided in a plurality of sub-machine, select the call address of the call by the operation procedure opponent, and a channel selection switch for selecting a passing story mode for the conference call mode or privacy call mode or of its own,
Wherein the plurality of respectively provided auxiliary machine, when a privacy call mode by operating the channel selection switch is selected, the own apparatus via the common wiring as privacy call signal by adding a constant value to the call address of the other party selected and transmitting means for sending to all sub-machine other than,
A storage unit that is provided in each of the plurality of sub-devices and stores a self-address;
Respectively provided on the plurality of sub-machine, in a state in which receiving the privacy call signal, obtained by subtracting the predetermined value from the confidential call signal sent through the common wiring and the self address call An intercom apparatus, comprising: setting means for setting the sub-device in a call-ready state when the outgoing addresses match. The intercom apparatus according to any one of claims 1 to 3, wherein a nonvolatile memory is used as the storage unit.

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