JP4958703B2 - Cordless telephone equipment - Google Patents

Description

  The present invention relates to a cordless telephone apparatus having a quick call function for capturing a line by considering a call operation when a handset is lifted from a charging stand.

  For example, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 8-307340), conventionally, in a cordless telephone device, a charging voltage is applied to a charging terminal of a child device by placing the child device on a charging stand. The built-in battery is charged. In addition, as a quick call function, when the charging voltage is applied to the charging terminal of the slave unit and the charging voltage is applied to the charging terminal of the slave unit, the charging terminal is switched to the non-applied state. It is determined that the machine has been picked up and is in an off-hook state, and has a function of capturing a line with the parent machine.

Also, generally, when communication with the parent device cannot be performed during line acquisition or during external line connection, an error tone is sounded to notify the operator. As described above, the conventional cordless telephone device has a quick call function, so that it is not necessary to press the call button every time when making a call, and when it becomes unable to communicate with the master unit, an error tone is displayed. You can see that right away.
JP-A-8-307340 (paragraph [0027], FIG. 2)

  By the way, in a conventional cordless telephone device, when a power failure occurs or when the power supply switch of the entire room is turned off at the end of the company's work, etc., charging to the slave unit placed on the charging stand stops. The handset determines that the machine has been picked up and is off-hook, and the handset tries to seize the line with the base. However, since the power supply to the master unit is also stopped, the master unit cannot operate, so that the slave unit cannot communicate with the master unit and generates an error tone. In general, in offices, etc., there are often multiple telephones and multiple handsets installed, but if the power is turned off at the end of work hours, each handset will sound an error tone all at once and it will be very noisy. There was a problem of becoming a state.

  The inventor of the present application has made various investigations to solve the above problems, and as a result, when it is impossible to detect charging and when the wireless connection with the base unit is disconnected at the same time, an error tone is sounded. If not, the inventors have conceived that the above problems can be solved, and have completed the present invention.

  That is, the present invention has an object to solve the above-mentioned problems, and while maintaining a quick call function and a function for notifying a disconnection of a wireless connection with a base unit during a call by an error tone, it is a waste at the time of a power failure or the like. The purpose is to prevent an error tone from sounding.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is directed to a cordless telephone apparatus including a parent device connected to a telephone line and a child device wirelessly connected to the parent device. A charge detection means for detecting the charge state of the built-in battery (e.g., corresponding to the control unit 1 in the following embodiment), and a line between the master unit and the slave unit when the charge detection means detects a disconnection of charge. Line capture means for performing capture (for example, corresponding to the control unit 1 in the following embodiment) and error tone sounding means for sounding an error tone when communication is disabled during line capture or connection between the master unit and the slave unit (For example, in the following embodiment, it corresponds to the speaker (SP) 13) and synchronization signal detection means for detecting a synchronization signal constantly communicating between the master unit and the slave unit (for example, in the control unit 1 in the following example) Corresponding to the charge detection means That the detection of the charging disconnection, when the synchronization signal detecting means of the synchronizing signal interruption due to detection occur simultaneously, the it is determined that the power of the entire cordless telephone is down, the error tone even if the incommunicable If the master unit is controlled to be out of service so as not to sound an error tone by the ringing unit, and if the synchronization signal by the synchronization signal detection unit is not cut off, the line is captured in advance to the master unit. Control means for sending a line connection request for the set number of retries and controlling the error tone by the error tone sounding means when the retry is over (for example, in the following embodiment, it corresponds to the control unit 1) And).

  The cordless telephone device of the present invention has the following effects. That is, in the invention according to claim 1, when the charging of the battery of the slave unit is cut off, it is determined whether or not the synchronization signal from the parent unit is cut off. Judge that the power is off, so that an error tone does not sound even if communication with the base unit is disabled.

According to such a configuration, when the power is turned off at the time of a power failure or at the end of work, etc. while maintaining the quick call function and the function of notifying the wireless disconnection of the master unit at the time of a call with an error tone , Since it is possible to prevent useless error tone notification that is sounded, it is possible to improve user convenience .

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments shown below exemplify a cordless telephone device for embodying the technical idea of the present invention, and are not intended to identify the present invention as this cordless telephone device. The present invention is equally applicable to the cordless telephone devices of other embodiments included in the scope of claims.

  FIG. 1 is a block diagram showing a schematic configuration of a handset of a cordless telephone apparatus according to an embodiment of the present invention. The cordless telephone apparatus includes a control unit 1, a display unit 2, an operation unit 3, a memory unit 4, a power supply unit 5, a charging unit 6, an AC adapter 7, a transmission unit 8, a reception unit 9, a frequency synthesizer 10, and an antenna 11. , Receiver 12, speaker (SP) 13, and the like.

  The control unit 1 corresponds to the charge detection means, the line capture means, the synchronization signal detection means, and the control means of the present invention, and the speaker (SP) 13 corresponds to the error tone sounding means of the present invention.

  The control unit 1 is mainly composed of a microprocessor, and includes a memory such as a ROM and a RAM as in a general computer device, reads various control programs stored in the ROM, and stores a program storage area in the RAM. And various controls of the slave unit are performed according to the control program. In addition, the control unit 1 performs control to sound an error tone when communication with the parent device becomes impossible during line acquisition or during external line connection.

  The display unit 2 is a display unit composed of a liquid crystal panel or the like, and text data such as a telephone number read from the telephone directory, the name of the other party, the call time, and the call charge according to a control signal from the control unit 1. Various kinds of image data are displayed on the liquid crystal screen.

  The operation unit 3 includes a numeric keypad for inputting numbers and characters, a call key for operating calling and starting of a call, an end key for operating end of a call, and a telephone book for registering / searching a phone book. It consists of keys, mode setting keys for performing operations for setting various modes, etc., and operates a numeric keypad and operation keys to perform a call operation and input various data.

  The memory unit 4 is configured by a RAM, and stores information necessary for the operation of the control unit 1 (for example, the number of retries for a line connection request) and various data such as a telephone directory. In this telephone directory, personal information such as names, telephone numbers, e-mail addresses, and addresses can be stored.

  The power supply unit 5 incorporates a rechargeable battery and supplies power to each unit of the slave unit. The charging unit 6 charges the battery of the power source unit 5 with a predetermined DC voltage supplied from the AC adapter 7 while the slave unit is placed on a charging stand (not shown). Further, the charging unit 6 constantly sends the presence / absence of the charging current of the battery to the control unit 1, and in response to this, the control unit 1 detects the charge state of the battery, and when the disconnection of the battery is detected, Inter-line capture.

  The transmission unit 8 and the reception unit 9 establish a wireless communication link with a base unit, which will be described later, via the antenna 11 to transmit / receive signals to / from the base unit, and the frequency synthesizer 10 performs signal oscillation. The transmission / reception frequency of the transmission unit 8 and the reception unit 9 is switched by a control signal from the control unit 1.

  The receiver 12 makes a call using a speaker (SP) and a microphone (MIC). The speaker (SP) is for converting the electrical signal of the audio signal processing unit in the control unit 1 amplified by the amplifier circuit into sound and outputting it, and the microphone (MIC) amplifies the sound converted to the electrical signal The signal is amplified by a circuit and output to an audio signal processing unit in the control unit 1. The speaker (SP) 13 is used to notify by sounding an error tone when communication with the base unit becomes impossible.

  FIG. 2 is a block diagram showing a schematic configuration of the base unit of the cordless telephone apparatus according to one embodiment of the present invention. The base unit of the cordless telephone device includes a control unit 21, an incoming call detection unit 22, a line connection unit 23, a display unit 24, an operation unit 25, a memory unit 26, an AC adapter 27, a power supply unit 28, a transmission unit 30, a reception unit 31, A frequency synthesizer 32, an antenna 33, a receiver 34, a speaker (SP) 35, a microphone (MIC) 36, and the like are provided.

  The control unit 21 is configured mainly with a microprocessor, and includes a memory such as a ROM and a RAM as in a general computer device, reads various control programs stored in the ROM, and stores a program storage area in the RAM. And perform various controls of the master unit according to the control program.

  The incoming call detection unit 22 shapes an incoming signal from an external line into a pulse signal and outputs the pulse signal to detect an incoming call. The line connection unit 23 is connected to a telephone line to release / close the line, or performs call processing based on the telephone number information stored in the telephone directory or the telephone number information transferred from the handset. Or connect to an external telephone device via a telephone line.

  The display unit 24 is a display unit composed of a liquid crystal panel or the like, and text data such as a telephone number read from the telephone directory, the name of the other party, a call time, and a call charge in accordance with a control signal from the control unit 1. Various kinds of image data are displayed on the liquid crystal screen.

  The operation unit 25 is a numeric keypad for inputting numbers and characters, a call key for operating calling and starting a call, an end key for operating end of a call, and a telephone book for registering / searching a phonebook. It consists of keys, mode setting keys for performing operations for setting various modes, etc., and operates a numeric keypad and operation keys to perform a call operation and input various data.

  The memory unit 26 is configured by a RAM, and stores various data such as a telephone book that is information necessary for the operation of the control unit 21. In this telephone directory, personal information such as names, telephone numbers, e-mail addresses, and addresses can be stored. The power supply unit 28 receives direct current of a predetermined voltage from the AC adapter 27 and supplies power to each unit of the parent device.

  The transmission unit 30 and the reception unit 31 establish a wireless communication link with the slave unit via the antenna 33 to transmit and receive signals to the slave unit, and the frequency synthesizer 32 performs signal oscillation. The transmission / reception frequency of the transmission unit 30 and the reception unit 31 is switched by a control signal from the control unit 21.

  The handset 34 performs a call using a speaker (SP) and a microphone (MIC). The speaker (SP) is for converting the electric signal of the audio signal processing unit in the control unit 21 amplified by the amplifier circuit into sound and outputting the sound, and the microphone (MIC) amplifies the sound converted into the electric signal. The signal is amplified by a circuit and output to an audio signal processing unit in the control unit 21. A speaker (SP) 35 and a microphone (MIC) 36 are used for hands-free calling.

  In the cordless telephone apparatus having such a configuration, the slave unit according to the present invention has a function of sounding an error tone when communication with the master unit becomes impossible during line capture or during external line connection.

  In addition, the communication performed between the master unit and the slave unit in the digital cordless telephone apparatus generally adopts a time division multiple access method, and communication between one slave unit and the master unit is one channel. The transmission slot and the reception slot are used only once every several cycles, and other transmission slots and reception slots in the same channel are used for communication between other slave units and the master unit. The channel enables communication between multiple slave units and the master unit.

  In communication of such a system, transmission of a control signal from the master unit to each slave unit is performed in a fixed format every predetermined period. When each slave unit is in a reception standby state, only the control signal is intermittently received as a synchronization signal.

  In the present invention, when the receiver unit 9 of the slave unit cannot receive the synchronization signal from the master unit, the control unit 1 of the slave unit determines that the power source of the master unit is turned off and the slave unit is not charged. When it is determined that the slave unit has gone off-hook and the slave unit tries to seize the line with the master unit, an error tone is not sounded even if communication with the master unit is lost, and a power failure occurs. When the power is turned off at the time of work or at the end of work, etc., it is now possible to prevent each slave unit from sounding an error tone all at once.

  Next, the control processing of the slave unit of the present invention will be described with reference to the flowchart of FIG.

  FIG. 3 is a flowchart showing the control processing of the handset of the cordless telephone apparatus according to one embodiment of the present invention.

  The operation shown in FIG. 3 is realized by executing a control program stored in a ROM provided in the control unit 1.

  In the flowchart of FIG. 3, while the slave unit placed on the charging stand is waiting for a signal from the master unit, first, in step S1, the control unit 1 detects the charging current from the charging unit 6, and the detection result Based on the above, the charging unit 6 detects whether the battery built in the power source unit 5 is being charged. If it is detected that the battery is being charged, the process proceeds to step S2, while the charging unit 6 detects that the battery is not being charged. If so, the process proceeds to step S3.

  In step S2, the control unit 1 determines whether or not the call key is pressed together with the numeric key provided on the operation unit 3. If the call key is pressed, the process proceeds to step S5, where the call key is pressed. If not lowered, the process returns to step S1.

  On the other hand, when it is detected that charging is not being performed in the detection process of step S1, the control unit 1 controls the reception unit 9 in step S3 so that the reception unit 9 receives the synchronization signal intermittently, Based on the reception result, the control unit 1 determines whether or not the synchronization signal from the base unit is disconnected. If it is determined that the synchronization signal is disconnected, the process proceeds to step S4, where the synchronization signal is disconnected. If not, the process proceeds to step S5.

  In step S4, when the control unit 1 detects that charging is not being performed and determines that the synchronization signal from the base unit is cut off, the control unit 1 determines that the power of the entire cordless telephone device has been turned off. In order to prevent an error tone from being generated, it is treated as out-of-master range and the process is terminated.

  On the other hand, when the call key is pressed in the determination process of step S2 or when the synchronization signal is not cut off in step S3, the control unit 1 controls the frequency synthesizer 10 in step S5. A line acquisition process is performed for the base unit via the transmission unit 8 and the reception unit 9. In step S6, the control unit 1 determines whether or not the line has been acquired. If the line has been acquired, the control unit 1 proceeds to step S7. If the line has not been acquired, the process proceeds to step S13.

  In step S <b> 7, the control unit 1 sends a line connection request to the parent device via the transmission unit 8. In step S8, the control unit 1 determines whether or not a connection response signal has been received from the parent device via the reception unit 9. If the connection response signal is received, the control unit 1 proceeds to step S10. If no response signal has been received, the process proceeds to step S9.

  In step S9, the control unit 1 determines whether or not a retry has been made by sending a line connection request to the memory unit 4 for a preset number of retries. If the retry is over, the process proceeds to step S13. If the retry is not over, the process returns to step S7 to retry sending a line connection request.

  On the other hand, when the connection response signal is received in the determination process of step S8, the control unit 1 moves to the processing of the external line call via the transmission unit 8 and the reception unit 9 by controlling the frequency synthesizer 10 in step S10. In step S11, the control unit 1 determines whether or not a call is possible.

  If it is determined in step S11 that a call is possible, the process proceeds to step S12. If a call is not possible, the process proceeds to step S13. In step S12, the control unit 1 determines whether or not the call is ended and the call end key provided in the operation unit 3 is pressed to end the call. When the call is ended, the process ends. On the other hand, if the call has not ended, the process returns to step S11.

  On the other hand, if the line is not captured in the determination process of step S6, if the retry is over in the determination process of step S9, or if a call is not possible in the determination process of step S11, the control unit 1 performs step S13. Then, an error tone is sent from the speaker (SP) 13 to finish the process.

  As described above, according to the cordless telephone device according to the present invention, when the battery of the slave unit is disconnected, it is determined whether or not the synchronization signal from the master unit is disconnected, and the synchronization signal is disconnected. If so, it can be determined that the entire power supply has been turned off, and an error tone can be prevented from sounding even if communication with the parent device is disabled. For this reason, as in the past, it is possible to use the error tone notification and quick call function when the base unit is disconnected at the time of a call as it is, and to prevent unnecessary error tone notification at the time of a power failure. Convenience can be improved.

It is a block diagram which shows schematic structure of the subunit | mobile_unit of the cordless telephone apparatus based on one Example of this invention. It is a block diagram which shows schematic structure of the main | base station of the cordless telephone apparatus which concerns on one Example of this invention. It is a flowchart which shows the control processing of the subunit | mobile_unit of the cordless telephone apparatus based on one Example of this invention.

Explanation of symbols

1, 21... Control unit 2, 24... Display unit 3, 25... Operation unit 4, 26. Charging unit 7, 27 ... AC adapter 8, 30 ... Transmission unit 9, 31 ... Reception unit 10, 32 ... Frequency synthesizer 11, 33 ... Antenna 12 ... · Receiver 13 ··· Speaker 22 ··· Incoming call detector 23 · · · Line connection 34 · · · Handset 35 · · · Speaker 36 · · · Microphone

Claims (1)

In a cordless telephone device comprising a parent device connected to a telephone line and a child device wirelessly connected to the parent device,
Charging detection means for detecting the charging state of the battery built in the slave unit;
Line capturing means for capturing a line between the master unit and the slave unit when the charge detection unit detects a disconnection of charging;
An error tone sounding means for sounding an error tone when communication becomes impossible during line capture or when the master unit and slave unit are connected,
Synchronization signal detection means for detecting a synchronization signal constantly communicating between the master unit and the slave unit;
When the detection of the charge interruption by the charge detection means and the detection of the synchronization signal interruption by the synchronization signal detection means occur at the same time, it is determined that the power of the entire cordless telephone device is turned off, and the communication becomes impossible. In addition, the master unit is controlled to be out of service so as not to generate the error tone by the error tone generating unit, and if the synchronization signal by the synchronization signal detecting unit is not cut off, the line is captured by the master unit. Then, a control means for sending a line connection request for a preset number of retries and controlling to sound an error tone by the error tone sounding means when a retry over occurs ,
A cordless telephone device comprising:

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