JP4595671B2 - Intercom system - Google Patents

Intercom system Download PDF

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JP4595671B2
JP4595671B2 JP2005148526A JP2005148526A JP4595671B2 JP 4595671 B2 JP4595671 B2 JP 4595671B2 JP 2005148526 A JP2005148526 A JP 2005148526A JP 2005148526 A JP2005148526 A JP 2005148526A JP 4595671 B2 JP4595671 B2 JP 4595671B2
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master
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sub
units
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JP2006325140A (en
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敏 杉本
英雄 阪本
光治 池田
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Panasonic Corp
Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Description

本発明は、インターホンシステムに関するものである。   The present invention relates to an intercom system.

従来から、図4に示すように、室内に配設される親機1と、それぞれ親機1とは別であって互いに異なる室内に配設され2線の信号線Lを介して親機1に接続され親機1との間で通話可能な複数台の副親機2a,2bと、室外に配設され親機1に接続され親機1及び副親機2a,2bとの間でそれぞれ通話可能な子器3とで構成されたインターホンシステムが提供されている。   Conventionally, as shown in FIG. 4, the master unit 1 disposed in the room and the master unit 1 via the two signal lines L disposed in different rooms from the master unit 1. Between a plurality of secondary master units 2a and 2b connected to the master unit 1 and capable of making a call with the master unit 1 and connected to the master unit 1 and connected to the master unit 1 between the master unit 1 and the secondary master units 2a and 2b, respectively. There is provided an intercom system including a handset 3 capable of making a call.

親機1及び副親機2a,2bの具体的な構成について、図5を参照しながら説明する。親機1及び副親機2a,2bは、それぞれ、音声を電気信号である音声信号に変換するマイクロホン11a,21aと、信号線Lを通じて受信された音声信号を音声に変換するスピーカ11b,21bと、マイクロホン11a,21aが出力した音声信号と信号線Lをから受信された音声信号とのうち音量(音圧)が相対的に高い一方の音声信号を択一的に通過させる音声スイッチ11c,21cと、音声スイッチ11c,21cの前後にそれぞれ設けられマイクロホン11a,21aから出力された音声信号を増幅する送信部としての増幅器11d,21dと、音声スイッチ11c,21cの前後にそれぞれ設けられスピーカ11b,21bに入力される音声信号を増幅する受信部としての増幅器11e,21eとを有する送受話部11,21を有する。送信側の増幅器11d,21dの出力端には、入出力インピーダンスを整合させるために例えば300Ωの抵抗11g,21gが接続されている。   Specific configurations of the master unit 1 and the sub-master units 2a and 2b will be described with reference to FIG. Each of the master unit 1 and the sub master units 2a and 2b includes microphones 11a and 21a that convert sound into sound signals that are electrical signals, and speakers 11b and 21b that convert sound signals received through the signal line L into sound, respectively. The voice switches 11c and 21c selectively pass one of the audio signals output from the microphones 11a and 21a and the audio signal received from the signal line L with a relatively high volume (sound pressure). And amplifiers 11d and 21d, which are provided before and after the audio switches 11c and 21c, respectively, and amplifying the audio signals output from the microphones 11a and 21a, and speakers 11b and 21c provided before and after the audio switches 11c and 21c, respectively. A transmitter / receiver 11 having amplifiers 11e and 21e as receivers for amplifying the audio signal input to 21b; Having one. For example, 300Ω resistors 11g and 21g are connected to the output ends of the amplifiers 11d and 21d on the transmission side in order to match the input / output impedance.

さらに、親機1及び副親機2a,2bは、それぞれ使用者によって操作される操作部としての複数個の個別呼出釦12a,22a及び1個の一斉呼出釦12b,22bと、個別呼出釦12a,22a又は一斉呼出釦12b,22bが操作されたときに加えられた操作に応じた制御信号を生成する制御部13,23と、制御部13,23が生成した制御信号を信号線Lを介して送信するとともに信号線Lを通じて受信された制御信号を制御部13,23に入力する制御信号送受信部14,24とを備える。また、送受話部11,21には、信号線Lと増幅器11d,11e,21d,21eとの接続をオンオフする接続部としての接続スイッチ11f,21fが設けられており、制御部13,23は、制御信号送受信部14,24に受信された制御信号に応じて接続スイッチ11f,21fをオンオフ制御する。   Further, each of the master unit 1 and the sub master units 2a and 2b includes a plurality of individual call buttons 12a and 22a, one general call button 12b and 22b, and an individual call button 12a as an operation unit operated by a user. , 22a or the simultaneous call buttons 12b, 22b, the control units 13, 23 for generating a control signal corresponding to the operation applied when the button is operated, and the control signals generated by the control units 13, 23 via the signal line L And control signal transmission / reception units 14 and 24 for inputting control signals received through the signal line L to the control units 13 and 23. In addition, the transmission / reception units 11 and 21 are provided with connection switches 11f and 21f as connection units for turning on / off the connection between the signal line L and the amplifiers 11d, 11e, 21d, and 21e. The connection switches 11f and 21f are on / off controlled in accordance with the control signals received by the control signal transmission / reception units 14 and 24.

具体的に説明すると、制御部13,23は、個別呼出釦12a,22aが操作されたときには加えられた操作に対応する親機1、副親機2a,2b又は子器3を示す個別呼出信号を送信させ、一斉呼出釦12b,22bが操作されたときには制御信号として所定の一斉呼出信号を送信させるとともに、上記のいずれの場合にも接続スイッチ11f,21fをオンする。ここで、制御信号が音声信号に影響を与えないように、制御信号としては高周波の搬送波を変調したものが用いられる。   More specifically, the control units 13 and 23 indicate individual call signals indicating the master unit 1, the sub master units 2a and 2b or the slave unit 3 corresponding to the operation added when the individual call buttons 12a and 22a are operated. When the general call buttons 12b and 22b are operated, a predetermined general call signal is transmitted as a control signal, and the connection switches 11f and 21f are turned on in any of the above cases. Here, a control signal obtained by modulating a high-frequency carrier wave is used so that the control signal does not affect the audio signal.

また、制御部13,23は、一斉呼出信号又は自己を対象とする個別呼出信号が制御信号送受信部14,24に受信されたときに、待機状態から動作状態に移行して、接続スイッチ11f,21fをオンする。さらに、一斉呼出信号又は自己を対象とする個別呼出信号の受信後、所定時間が経過したとき、又は、所定の終了信号が制御信号送受信部14,24に受信されたときに接続スイッチ11f,21fをオフして動作状態から待機状態に移行する。終了信号は、例えば、一斉呼出信号又は個別呼出信号を送信した親機1又は副親機2a,2b又は子器3において一斉呼出釦12b,22b又は個別呼出釦12a,22aが再度操作されたときに送信されるものとする。一方、自己を対象としない個別呼出信号が制御信号送受信部14,24に受信されたときには制御部13,23は接続スイッチ11f,21fの制御を行わない。   Further, when the control signal transmission / reception units 14 and 24 receive the general call signal or the individual call signal for the control unit 13 or 23, the control unit 13 or 23 shifts from the standby state to the operation state, and the connection switch 11f, Turn on 21f. Furthermore, the connection switches 11f and 21f are used when a predetermined time has elapsed after receiving the simultaneous call signal or the individual call signal for the self, or when a predetermined end signal is received by the control signal transmission / reception units 14 and 24. To switch from the operating state to the standby state. The end signal is, for example, when the general call button 12b, 22b or the individual call button 12a, 22a is operated again in the master unit 1, the sub master unit 2a, 2b, or the slave unit 3 that has transmitted the general call signal or the individual call signal. Shall be sent to On the other hand, when the individual call signal not intended for itself is received by the control signal transmission / reception units 14 and 24, the control units 13 and 23 do not control the connection switches 11f and 21f.

つまり、一斉呼出釦12b,22bが操作されたときには図6に示すように親機1,副親機2a,2bのうち1台のマイクロホン11a,21aに使用者M1,M2が入力した音声が親機1,副親機2a,2bのうち他の全てのスピーカ11b,21bから発せられるようになり、親機1と全ての副親機2a,2bとの通話(以下、「一斉通話」と呼ぶ。)が開始される。また、個別呼出釦12a,22aが操作されたときには、親機1と副親機2a,2bと子器3とのうち2台の間で一対一の通話(以下、「個別通話」と呼ぶ。)が開始される。   That is, when the general call buttons 12b and 22b are operated, as shown in FIG. 6, the voices input by the users M1 and M2 to the microphones 11a and 21a of the master unit 1 and the sub master units 2a and 2b are the parent. Calls are made from all the other speakers 11b and 21b of the device 1 and the sub-master devices 2a and 2b, and the call between the master device 1 and all the sub-master devices 2a and 2b (hereinafter referred to as "simultaneous call"). .) Is started. Further, when the individual call buttons 12a and 22a are operated, a one-to-one call (hereinafter referred to as "individual call") between two of the master unit 1, the sub master units 2a and 2b, and the slave unit 3 is performed. ) Is started.

また、子器3は、入力された音声を音声信号に変換して親機1に送信するマイクロホン部及び親機1から受信された音声信号を音声に変換するスピーカ部を備える。さらに、親機1には、子器3のマイクロホン部から出力された音声信号の信号線Lへの入力を、制御部13によって制御されてオンオフする切替部(図示せず)が設けられている。親機1の制御部13は、個別呼出釦12aに所定の操作が加えられたとき、切替部をオンして親機1と子器3との間で個別通話を開始させ、また、副親機2a,2bから送信され子器3を指定する個別呼出信号が制御信号送受信部14に受信されたとき、切替部をオンして副親機2a,2bと子器3との間で個別通話を開始させる。   Moreover, the subunit | mobile_unit 3 is provided with the microphone part which converts the input audio | voice into an audio | voice signal, and transmits to the main | base station 1, and the speaker part which converts the audio | voice signal received from the main | base station 1 into an audio | voice. Furthermore, the master unit 1 is provided with a switching unit (not shown) that is controlled by the control unit 13 to turn on / off the audio signal output from the microphone unit of the slave unit 3 to the signal line L. . When a predetermined operation is applied to the individual call button 12a, the control unit 13 of the base unit 1 turns on the switching unit to start an individual call between the base unit 1 and the handset 3, and When the individual call signal transmitted from the devices 2a and 2b and specifying the slave unit 3 is received by the control signal transmission / reception unit 14, the switching unit is turned on and the individual call between the secondary master units 2a and 2b and the slave unit 3 is performed. To start.

ここで、各副親機2a,2bの送受話部21は、親機1の送受話部11に対して互いに並列に接続される。従って、副親機2a,2bの台数が多くなると一斉通話時に音声信号の音量(音圧)の伝送レベルが低下することにより音量が低下する。   Here, the transmission / reception unit 21 of each sub-master unit 2a, 2b is connected in parallel to the transmission / reception unit 11 of the parent unit 1. Accordingly, when the number of sub-master units 2a and 2b increases, the volume of the audio signal decreases due to a decrease in the transmission level of the volume (sound pressure) of the audio signal during a simultaneous call.

そこで、以下の方法により信号強度の低下を補うことが提案されている。すなわち、信号線L間に接続された負荷抵抗27を各副親機2a,2bにそれぞれ設け、接続された副親機2a,2bの台数が多いほど信号線L間の電圧が低下する構成とする。また、増幅器11d,11e,21d,21eを、それぞれ制御部13、23によって増幅率が制御される可変増幅器で構成する。さらに、信号線L間の電圧を検出する電圧検出部18を親機1に設ける。親機1の制御部13は、電圧検出部18の出力に基いて副親機2a,2bの台数を検出するとともに、検出された副親機2a,2bの台数を示す台数通知信号を例えば一斉呼出信号とともに各副親機2a,2bに送信する。さらに、親機1及び各副親機2a,2bにおいては制御部13,23は送信又は受信された台数通知信号に示された副親機2a,2bの台数が多いほど増幅器11d,11e,21d,21eでの増幅率を高くする(例えば、特許文献1参照)。つまり、増幅器11d,11e,21d,21eでの増幅率を調整することにより、副親機2a,2bの台数の差による音声信号の減衰量の差を補う。   Therefore, it has been proposed to compensate for the decrease in signal strength by the following method. That is, the load resistor 27 connected between the signal lines L is provided in each of the sub-master units 2a and 2b, and the voltage between the signal lines L decreases as the number of the connected sub-master units 2a and 2b increases. To do. In addition, the amplifiers 11d, 11e, 21d, and 21e are configured as variable amplifiers whose amplification factors are controlled by the control units 13 and 23, respectively. Furthermore, the base unit 1 is provided with a voltage detector 18 that detects a voltage between the signal lines L. The control unit 13 of the master unit 1 detects the number of the sub master units 2a and 2b based on the output of the voltage detection unit 18, and simultaneously transmits a unit number notification signal indicating the number of the detected sub master units 2a and 2b. Along with the calling signal, it is transmitted to each secondary master unit 2a, 2b. Further, in the master unit 1 and each secondary master unit 2a, 2b, the control units 13, 23 increase the number of secondary master units 2a, 2b indicated in the transmitted or received number notification signal so that the amplifiers 11d, 11e, 21d increase. , 21e (see, for example, Patent Document 1). That is, by adjusting the amplification factors of the amplifiers 11d, 11e, 21d, and 21e, the difference in the attenuation amount of the audio signal due to the difference in the number of sub-master units 2a and 2b is compensated.

さらに、親機1には、電圧検出部18のゼロ点校正時に信号線Lと電圧検出部18との接続を遮断する校正スイッチ16が設けられている。
特許第3617284号公報
Further, the base unit 1 is provided with a calibration switch 16 for cutting off the connection between the signal line L and the voltage detection unit 18 when the zero point calibration of the voltage detection unit 18 is performed.
Japanese Patent No. 3617284

ところで、図5の例では、副親機2a,2bに、親機1とは別途に電力を供給される自立型副親機2aの他、信号線Lを介して親機1から電力を供給されて電源を生成する受電部25を有する受電型副親機2bが含まれている。さらに、親機1には、信号線L間に電圧を重畳することにより受電部25に電力を供給する給電部15を設けている。そして、給電部と信号線Lとの間には給電部15の出力電圧を分圧する分圧抵抗19が接続され、電圧検出部18は、分圧抵抗19と負荷抵抗27とによって分圧された電圧を検出する。   In the example of FIG. 5, power is supplied to the secondary master units 2 a and 2 b from the master unit 1 via the signal line L in addition to the self-supporting secondary master unit 2 a that is supplied with power separately from the master unit 1. Thus, a power receiving type secondary master unit 2b having a power receiving unit 25 that generates power is included. Furthermore, the parent device 1 is provided with a power feeding unit 15 that supplies power to the power receiving unit 25 by superimposing a voltage between the signal lines L. A voltage dividing resistor 19 that divides the output voltage of the power feeding unit 15 is connected between the power feeding unit and the signal line L, and the voltage detecting unit 18 is divided by the voltage dividing resistor 19 and the load resistor 27. Detect voltage.

ここで、分圧抵抗19の抵抗値が大きいほど副親機2a,2bの台数検出の精度は向上する。しかし、受電部25への十分な給電を維持するためには分圧抵抗19の抵抗値をあまり高くすることができず、従って副親機2a,2bの台数検出の精度が低くなっていた。   Here, as the resistance value of the voltage dividing resistor 19 is larger, the accuracy of detecting the number of sub-master units 2a and 2b is improved. However, in order to maintain sufficient power supply to the power receiving unit 25, the resistance value of the voltage dividing resistor 19 cannot be increased so much, and therefore the accuracy of detecting the number of sub-master units 2a and 2b has been lowered.

本発明は上記事由に鑑みて為されたものであり、その目的は、信号線を介して電力を供給される副親機を含む場合であっても副親機の台数検出の精度を確保することができるインターホンシステムを提供することにある。   The present invention has been made in view of the above reasons, and its purpose is to ensure the accuracy of detecting the number of secondary master units even when the secondary master unit supplied with power via a signal line is included. It is to provide an intercom system that can be used.

請求項1の発明は、親機と、それぞれ2線の信号線を介して親機に接続され親機との間で同時に通話可能な複数台の副親機とを備えるインターホンシステムであって、親機及び各副親機は、それぞれ、音声を電気信号である音声信号に変換するマイクロホンと、マイクロホンが出力した音声信号を増幅するとともに信号線を介して送信する送信部と、信号線を介して送信された音声信号を受信して増幅する受信部と、受信部で増幅された音声信号を音声に変換するスピーカと、送信部及び受信部と信号線との接続をオンオフする接続部と、信号線に電気的に接続された制御信号送受信部と、使用者によって操作される操作部と、操作部に加えられた操作に基いて制御信号を生成し制御信号送受信部を制御して信号線を介して送信させるとともに信号線を介して制御信号送受信部に受信された制御信号に基いて接続部をオンオフ制御する制御部とを備え、副親機として、信号線を介して親機から電力を供給されて電源を生成する受電部を有する受電型副親機と、親機とは別途に電力を供給される自立型副親機とのうち、少なくとも1台の受電型副親機を含み、自立型副親機は、少なくとも接続部がオフされているときに信号線間に電流を流す電流引込部を備え、親機は、信号線を介して受電型副親機の受電部へ電力を出力する給電部と、給電部から出力される電流を検出する電流検出部と、信号線に接続された副親機の台数を電流検出部の出力に基いて検出する台数検出部と、台数検出部で検出された副親機の台数を示す台数通知信号を所定の条件で各副親機に送信する台数通知部とを備え、全ての副親機が同時に親機と通話する際に、親機及び各副親機において、制御部は、送信部及び受信部での音声信号の増幅率を、それぞれ、最後に送信又は受信された台数通知信号における台数が多いほど高くするものであって、電流引込部に流れる電流が、受電型副親機の接続部がオフされているときに受電部に流れる電流Iと自立型副親機の台数よりも大きい所定の数Nとを用いてI/Nと表され、台数検出部は、信号線へ流出する電流に基いて受電型副親機と自立型副親機とのそれぞれの台数を検出し、台数通知信号は、受電型副親機と自立型副親機とのそれぞれの台数を示し、親機及び各副親機において、制御部は、送信部及び受信部での音声信号の増幅率を、それぞれ、最後に送信又は受信された台数通知信号において副親機に占める受電型副親機の割合が大きいほど高くすることを特徴とする。 The invention of claim 1 is an interphone system comprising a master unit and a plurality of secondary master units that are connected to the master unit via two signal lines and can communicate with the master unit simultaneously. Each of the master unit and each sub-master unit includes a microphone that converts voice into an audio signal that is an electrical signal, a transmitter that amplifies the voice signal output from the microphone and transmits the signal via a signal line, and a signal line. A receiving unit that receives and amplifies the transmitted audio signal, a speaker that converts the audio signal amplified by the receiving unit into audio, a connection unit that turns on and off the connection between the transmitting unit and the receiving unit, and the signal line; A control signal transmission / reception unit electrically connected to the signal line, an operation unit operated by a user, a control signal is generated based on an operation applied to the operation unit, and the control signal transmission / reception unit is controlled to generate a signal line And send it through And a control unit that controls on / off of the connection unit based on a control signal received by the control signal transmission / reception unit via the signal line, and as a sub-master unit, power is supplied from the master unit via the signal line. A self-supporting sub-master device including at least one power-receiving-type sub-master device among a power-receiving-type sub-master device having a power-receiving unit to be generated and a self-supporting sub-master device supplied with power separately from the master device Is provided with a current lead-in portion that allows current to flow between the signal lines at least when the connection portion is turned off, and the parent device includes a power feeding portion that outputs power to the power receiving portion of the power receiving type sub-master device via the signal line. Detected by the current detection unit for detecting the current output from the power supply unit, the number detection unit for detecting the number of secondary master units connected to the signal line based on the output of the current detection unit, and the number detection unit A unit number notification unit for transmitting a unit number notification signal indicating the number of sub-base units to each sub-base unit under a predetermined condition; When all the sub-master units talk to the master unit at the same time, in the master unit and each sub-master unit, the control unit transmits the amplification factor of the audio signal at the transmitting unit and the receiving unit, respectively, at the end or The higher the number in the received number notification signal, the higher the current, and the current flowing in the current drawing unit is independent from the current I flowing in the power receiving unit when the connection unit of the power receiving sub-master is turned off. It is expressed as I / N using a predetermined number N that is larger than the number of secondary master units, and the number detection unit determines whether the power receiving type secondary master unit and the self-supporting secondary base unit are based on the current flowing out to the signal line. Each unit number is detected, and the unit number notification signal indicates the number of each of the power receiving type sub-master unit and the self-supporting sub-master unit. In the master unit and each sub-master unit, the control unit is a transmitter unit and a receiver unit. The amplification factor of the audio signal is the sub-parent number in the number notification signal transmitted or received last. It is characterized in that the higher the proportion of the power receiving type secondary master unit in the machine, the higher .

この発明によれば、給電部から出力される電流に基いて副親機の台数を検出するので、受電型副親機を含みながらも副親機の台数検出の精度が確保される。また、受電型副親機と自立型副親機との台数構成による音声信号の減衰量の差を補うことができる。さらに、電流引込部に流れる電流を、接続部がオフされた受電型副親機の受電部に流れる電流と略等しくする場合に比べ、電流引込部に流れる電流が少ないから、消費電力が低減される。 According to the present invention, since the number of secondary master units is detected based on the current output from the power supply unit, the accuracy of detecting the number of secondary master units is ensured while including the power receiving type secondary master unit. In addition, it is possible to compensate for the difference in the attenuation amount of the audio signal due to the number configuration of the power receiving type sub-master device and the self-supporting sub-master device. Furthermore, compared with the case where the current flowing through the current drawing unit is substantially equal to the current flowing through the power receiving unit of the power receiving type sub-master unit whose connection unit is turned off, the current flowing through the current drawing unit is less, so the power consumption is reduced. The

請求項2の発明は、請求項1の発明において、電流検出部は、給電部から出力される電流に応じた電流が流れる箇所に接続された電流検出抵抗と、電流検出抵抗の両端電圧を検出する電圧検出部とからなることを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the current detection unit detects a current detection resistor connected to a location where a current corresponding to the current output from the power supply unit flows, and a voltage across the current detection resistor. And a voltage detection unit.

請求項3の発明は、請求項1又は請求項2の発明において、電流引込部は信号線間に接続された電流引込抵抗からなることを特徴とする。   According to a third aspect of the present invention, in the first or second aspect of the present invention, the current drawing section includes a current drawing resistor connected between the signal lines.

請求項4の発明は、請求項1又は請求項2の発明において、電流引込部は信号線間に接続された定電流回路からなることを特徴とする。   According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the current lead-in portion includes a constant current circuit connected between the signal lines.

この発明によれば、電流検出部に検出される電流値の、副親機が1台追加されたときの増加幅が、副親機の台数に関わらず一定となるから、副親機の台数に関わらず副親機の台数検出の精度が確保される。   According to the present invention, the amount of increase in the current value detected by the current detection unit when one secondary master unit is added is constant regardless of the number of secondary master units. Regardless, the accuracy of detecting the number of secondary master units is ensured.

請求項5の発明は、請求項1〜4のいずれかの発明において、親機に接続され親機及び各副親機とそれぞれ通話可能な子器を備え、子器は、音声を電気信号である音声信号に変換して親機に出力するマイクロホン部と使用者によって操作される操作部とを備え、親機は、子器のマイクロホン部が出力した音声信号の信号線への出力を制御部に制御されてオンオフする切替部を備え、親機の制御部は、子器の操作部に所定の操作が加えられたときに制御信号送受信部を制御して制御信号としての一斉送話信号を信号線を通じて送信させるとともに切替部をオンし、親機及び各副親機において、制御部は、信号線を通じて一斉送話信号が送信又は受信されたときには接続部をオンするとともに、少なくとも受信部における音声信号の増幅率を、最後に送信又は受信された台数通知信号における台数が多いほど高くすることを特徴とする。 The invention of claim 5 comprises a slave unit connected to the master unit and capable of communicating with each of the master unit and each sub-master unit according to any one of claims 1 to 4, wherein the slave unit is configured to transmit voice by an electrical signal. It has a microphone unit that converts it into a certain audio signal and outputs it to the main unit and an operation unit operated by the user. The main unit controls the output of the audio signal output from the microphone unit of the slave unit to the signal line. The control unit of the master unit controls the control signal transmission / reception unit when a predetermined operation is applied to the operation unit of the slave unit, and transmits a simultaneous transmission signal as a control signal. In the master unit and each sub-master unit, the control unit turns on the connection unit when a broadcast signal is transmitted or received through the signal line, and at least in the receiving unit. Set the audio signal gain to the maximum Characterized by higher the number is large in the transmission or received number notification signal.

この発明によれば、子器から出力された音声信号が親機と副親機とに同時に出力されるときにも、副親機の台数による音声信号の減衰量の差を補うことができる。   According to the present invention, even when the audio signal output from the slave unit is output to the master unit and the secondary master unit at the same time, the difference in the attenuation amount of the audio signal due to the number of secondary master units can be compensated.

請求項の発明は、請求項1〜のいずれかの発明において、親機及び各副親機において、制御部は、親機又は副親機との間で一対一の通話を行う際に、送信部及び受信部における音声信号の増幅率を、それぞれ最後に受信された台数通知信号における台数が多いほど高くすることを特徴とする。 The invention of claim 6 is the invention according to any one of claims 1 to 5 , wherein in the master unit and each sub master unit, the control unit performs a one-to-one call with the master unit or the sub master unit. The amplification factor of the audio signal in the transmission unit and the reception unit is increased as the number of units in the last received unit number notification signal increases.

この発明によれば、親機と副親機又は副親機同士の一対一の通話時にも、副親機の台数による音声信号の減衰量の差を補うことができる。   According to the present invention, it is possible to compensate for the difference in the attenuation of the audio signal depending on the number of sub-master units even during a one-to-one call between the master unit and the sub-master unit or sub-master units.

請求項の発明は、請求項5の発明において、各副親機において、制御部は、子器との間で通話する際に、送信部及び受信部における音声信号の増幅率を、それぞれ最後に受信された台数通知信号における台数が多いほど高くすることを特徴とする。 According to a seventh aspect of the present invention, in the subordinate main unit of the fifth aspect, the control unit sets the last amplification factor of the audio signal in the transmission unit and the reception unit when talking with the slave unit. It is characterized in that the higher the number in the number notification signal received, the higher the number.

この発明によれば、副親機と子器との一対一の通話時にも、副親機の台数による音声信号の減衰量の差を補うことができる。   According to the present invention, it is possible to compensate for the difference in the amount of attenuation of the audio signal depending on the number of sub-master units even during a one-to-one call between the sub-master unit and the slave units.

請求項の発明は、請求項1〜のいずれかの発明において、受電型副親機の給電部は接続部がオフされているときには受信部及び送信部への電力の供給を停止するものであって、親機の制御部は、接続部がオンされている受電型副親機の台数を、電流検出部に流れる電流に基いて検出して監視し、全ての副親機の接続部をオフさせる制御信号である終了信号が、親機の制御信号送受信部において送信又は受信されたとき、接続部がオンされている受電型副親機の台数が0台にならなかった場合には、制御信号送受信部を制御して終了信号を再度送信させることを特徴とする。 The invention of claim 8 is the invention according to any one of claims 1 to 7 , wherein the power feeding unit of the power receiving type sub-master unit stops supplying power to the receiving unit and the transmitting unit when the connecting unit is turned off. The control unit of the master unit detects and monitors the number of power-receiving type secondary master units whose connection units are turned on based on the current flowing in the current detection unit. When the end signal, which is a control signal for turning off the device, is transmitted or received by the control signal transmission / reception unit of the parent device, and the number of power-receiving sub-master devices whose connection unit is turned on does not become zero The control signal transmitting / receiving unit is controlled to transmit the end signal again.

この発明によれば、制御信号の伝送誤りによる受電型副親機の誤動作の発生を抑えることができる。   According to the present invention, it is possible to suppress the malfunction of the power receiving type sub-master device due to the transmission error of the control signal.

請求項の発明は、請求項1〜のいずれかの発明において、親機は、台数検出部によって検出された副親機の台数が0台であるときに使用者に報知する無接続報知部を備えることを特徴とする。 The invention of claim 9 is the non-connection notification that notifies the user when the number of sub-master units detected by the number detection unit is zero in the invention of any one of claims 1-8. It comprises a part.

この発明によれば、副親機の誤接続の発生を抑えることができる。   According to the present invention, it is possible to suppress the occurrence of erroneous connection of the secondary master unit.

請求項10の発明は、請求項1〜のいずれかの発明において、親機は、台数検出部によって検出された副親機の台数が所定の規定台数を上回っているときに使用者に報知する多接続報知部を備えることを特徴とする。 The invention of claim 10 is the invention according to any one of claims 1 to 9 , wherein the master unit notifies the user when the number of secondary master units detected by the number detection unit exceeds a predetermined number. And a multi-connection notification unit.

この発明によれば、親機が対応できない台数の副親機を親機に接続しないよう使用者に警告することができる。   According to the present invention, it is possible to warn the user not to connect the number of secondary master units that cannot be supported by the master unit to the master unit.

本発明によれば、自立型副親機は親機の給電部から出力される電流が流れる電流引込部を有し、親機の台数検出部は給電部から出力される電流に基いて副親機の台数を検出するので、受電型副親機を含みながらも副親機の台数検出の精度が確保される。また、受電型副親機と自立型副親機との台数構成による音声信号の減衰量の差を補うことができる。さらに、電流引込部に流れる電流を、接続部がオフされた受電型副親機の受電部に流れる電流と略等しくする場合に比べ、電流引込部に流れる電流が少ないから、消費電力が低減される。 According to the present invention, the self-supporting secondary master unit has a current drawing unit through which the current output from the power supply unit of the master unit flows, and the number detection unit of the master unit is based on the current output from the power supply unit. Since the number of machines is detected, the accuracy of detecting the number of secondary master units is ensured while including the power receiving type secondary master unit. In addition, it is possible to compensate for the difference in the attenuation amount of the audio signal due to the number configuration of the power receiving type sub-master device and the self-supporting sub-master device. Furthermore, compared with the case where the current flowing through the current drawing unit is substantially equal to the current flowing through the power receiving unit of the power receiving type sub-master unit whose connection unit is turned off, the current flowing through the current drawing unit is less, so the power consumption is reduced. The

以下、本発明を実施するための最良の形態及び本発明に関連する参考例について、図面を参照しながら説明する。 The best mode for carrying out the present invention and reference examples related to the present invention will be described below with reference to the drawings.

参考例
参考例の基本構成は従来例と共通であるので、共通する部分については同じ符号を付して説明を省略する。
( Reference example )
Since the basic configuration of this reference example is the same as that of the conventional example, common parts are denoted by the same reference numerals and description thereof is omitted.

図1に示すように、本参考例の親機1は、電圧検出部18や分圧抵抗19に代え、電源と給電部15との間に接続されて給電部15に流入する電流を検出する電流検出部17を備える。給電部15から流出する電流は給電部15に流入する電流に比例している。すなわち、電流検出部17は給電部15から流出する電流を間接的に検出している。電流検出部17は、例えば図2に示すように、給電部15への給電路に挿入された電流検出抵抗17aと、電流検出抵抗17aの両端電圧を検出する電圧検出部17bとからなる。電流検出部17のゼロ点校正は、給電部15及び送受話部11と信号線Lとの接続をオンオフする校正スイッチ16を開くことにより可能となる。 As shown in FIG. 1, the base unit 1 of the present reference example detects a current flowing into the power feeding unit 15 connected between the power source and the power feeding unit 15 instead of the voltage detection unit 18 and the voltage dividing resistor 19. A current detection unit 17 is provided. The current flowing out from the power feeding unit 15 is proportional to the current flowing into the power feeding unit 15. That is, the current detection unit 17 indirectly detects the current flowing out from the power supply unit 15. For example, as shown in FIG. 2, the current detection unit 17 includes a current detection resistor 17 a inserted in a power supply path to the power supply unit 15 and a voltage detection unit 17 b that detects a voltage across the current detection resistor 17 a. The zero point calibration of the current detection unit 17 can be performed by opening the calibration switch 16 that turns on and off the connection between the power supply unit 15 and the transmission / reception unit 11 and the signal line L.

また、親機1の制御部13は、電流検出部17の出力に基いて副親機2a,2bの台数を検出し、検出された副親機2a,2bの台数を示す台数通知信号を所定の通知タイミングで各副親機2a,2bに送信する。上記通知タイミングとしては、具体的には例えば親機1や副親機2a,2bの接続スイッチ11f,21fをオンさせる何らかの制御信号が制御信号送受信部14において送信又は受信されたときや、親機1の電源投入直後や、予め設定された時刻などが考えられる。または、制御部13が制御信号送受信部14に一定時間おきに台数通知信号を送信させるようにしてもよい。つまり、制御部13が台数検出部であり、制御信号送受信部14が台数通知部である。   Further, the control unit 13 of the base unit 1 detects the number of the sub-base units 2a and 2b based on the output of the current detection unit 17, and outputs a unit number notification signal indicating the detected number of the sub-base units 2a and 2b. Are transmitted to the secondary master units 2a and 2b at the notification timing. Specifically, the notification timing is, for example, when a control signal for turning on the connection switches 11f and 21f of the master unit 1 and the sub master units 2a and 2b is transmitted or received by the control signal transmission / reception unit 14, or The time immediately after turning on the power of 1 or a preset time can be considered. Alternatively, the control unit 13 may cause the control signal transmission / reception unit 14 to transmit the number notification signal at regular intervals. That is, the control unit 13 is a number detection unit, and the control signal transmission / reception unit 14 is a number notification unit.

さらに、親機1及び副親機2a,2bにおいては、制御部13,23は、最後に送信又は受信された台数通知信号に示された副親機2a,2bの台数が多いほど、一斉通話時の増幅器11d,11e,21d,21eでの増幅率をそれぞれ高くする。   Further, in the master unit 1 and the sub master units 2a and 2b, the control units 13 and 23 make a simultaneous call as the number of the sub master units 2a and 2b indicated in the number notification signal transmitted or received last increases. The amplification factors of the amplifiers 11d, 11e, 21d, and 21e are increased.

ここで、待機状態であっても副親機2a,2bの受電部25や電流引込部26が信号線Lに接続されることにより、個別通話時にも副親機2a,2bの台数による音声信号の減衰量の差は生じる。そこで、本参考例では、親機1及び副親機2a,2bにおいて、制御部13,23は、個別通話時にも、最後に送信又は受信された台数通知信号に示された副親機2a,2bの台数が多いほど、増幅器11d,11e,21d,21eでの増幅率をそれぞれ高くする。これにより、個別通話時にも、副親機2a,2bの台数による音声信号の減衰量の差を補っている。 Here, even in the standby state, the power receiving unit 25 and the current drawing unit 26 of the secondary master units 2a and 2b are connected to the signal line L, so that the audio signal based on the number of secondary master units 2a and 2b can be obtained even during an individual call. A difference in attenuation occurs. Therefore, in the present reference example , in the master unit 1 and the sub master units 2a and 2b, the control units 13 and 23 also perform the sub master unit 2a, The larger the number of 2b, the higher the amplification factor in each of the amplifiers 11d, 11e, 21d, and 21e. This compensates for the difference in the amount of attenuation of the audio signal due to the number of sub-master units 2a and 2b even during individual calls.

また、子器3には、使用者によって操作される操作部(図示せず)が設けられている。親機1の制御部13は、子器3の操作部に所定の操作が加えられたときに、制御信号送受信部14を制御して制御信号としての所定の一斉送話信号を送信させ、その後、子器3のマイクロホン部から出力される音声信号が送受話部11に入力されるとともに信号線Lを介して各副親機2a,2bに送信されるように、接続スイッチ11fと切替部とをそれぞれオンする。副親機2a,2bにおいては、制御部23は、一斉送話信号が制御信号送受信部24に受信されると、接続スイッチ21fをオンして動作状態に移行する。つまり、使用者M1,M2は、子器3の操作部に所定の操作を加えることにより、子器3のマイクロホン部に入力された音声が親機1及び副親機2a,2bの全てのスピーカ11b,21bから出力される一斉送話を開始させることができる。さらに、親機1及び副親機2a,2bでは、制御部13,23は、最後に送信又は受信された台数通知信号に示された副親機2a,2bの台数が多いほど一斉送話時に受信側の増幅器11e,21eでの増幅率を高くする。従って、上記一斉送話時にも、副親機2a,2bの台数による音声信号の減衰量の差が補われる。   Moreover, the subunit | mobile_unit 3 is provided with the operation part (not shown) operated by the user. When a predetermined operation is applied to the operation unit of the slave unit 3, the control unit 13 of the base unit 1 controls the control signal transmission / reception unit 14 to transmit a predetermined simultaneous transmission signal as a control signal, and then The connection switch 11f, the switching unit, and the like so that the audio signal output from the microphone unit of the slave unit 3 is input to the transmitter / receiver unit 11 and transmitted to the sub-master units 2a and 2b via the signal line L. Each is turned on. In the secondary master units 2a and 2b, when the simultaneous transmission signal is received by the control signal transmission / reception unit 24, the control unit 23 turns on the connection switch 21f and shifts to an operation state. That is, the users M1 and M2 perform a predetermined operation on the operation unit of the slave unit 3, so that the sound input to the microphone unit of the slave unit 3 is transmitted to all the speakers of the master unit 1 and the sub master units 2a and 2b. The simultaneous transmission output from 11b and 21b can be started. Further, in the master unit 1 and the sub master units 2a and 2b, the control units 13 and 23 allow the simultaneous transmission to be performed as the number of sub master units 2a and 2b indicated in the last transmitted or received number notification signal increases. The amplification factor in the receiving-side amplifiers 11e and 21e is increased. Therefore, the difference in the amount of attenuation of the audio signal due to the number of sub-master units 2a and 2b is compensated even during the simultaneous transmission.

さらに、負荷抵抗27を設けず、自立型副親機2aにのみ、接続スイッチ21fがオフされている受電型副親機2bの受電部25に流入する電流と略等しい電流が流れる電流引込部26を接続スイッチ21fの前段に設けている。ここで、音声信号の入出力への影響を抑えるため、電流引込部26のインピーダンスは、送受話部21のインピーダンスに対して十分に大きくすることが望ましい。電流引込部26は、例えば図3(a)に示すように信号線L間に接続された電流引込抵抗26aで構成することができる。又は、電流引込部26を、図3(b)に示すように信号線L間に接続された定電流回路26bで構成してもよい。ここで、電流引込部26を電流引込抵抗26aで構成した場合、自立型副親機2aを1台追加したときの電流検出部17で検出される電流の増加幅は副親機2a,2bの台数が増加するにつれて減少するから、副親機2a,2bの台数が増加するにつれて副親機2a,2bの台数検出の精度が低下する。一方、電流引込部26を定電流回路26bで構成すれば、自立型副親機2aを1台追加したときの電流検出部17で検出される電流の増加幅が副親機2a,2bの台数に関わらず略一定となるから、副親機2a,2bの台数に関わらず台数検出の精度を確保することができる。なお、本参考例においては、受電部25に流入する電流を略一定としているので、受電型副親機2bを1台追加したときの電流検出部17で検出される電流の増加幅は副親機2a,2bの台数に関わらず略一定である。 Further, the current drawing unit 26 in which a current substantially equal to the current flowing into the power receiving unit 25 of the power receiving type sub master unit 2b in which the connection switch 21f is turned off flows only in the self-supporting sub base unit 2a without providing the load resistor 27. Is provided in front of the connection switch 21f. Here, in order to suppress the influence on the input / output of the audio signal, it is desirable that the impedance of the current drawing unit 26 be sufficiently larger than the impedance of the transmission / reception unit 21. The current drawing unit 26 can be configured by a current drawing resistor 26a connected between the signal lines L as shown in FIG. Or you may comprise the current drawing part 26 with the constant current circuit 26b connected between the signal lines L, as shown in FIG.3 (b). Here, when the current drawing unit 26 is configured by the current drawing resistor 26a, the increase in current detected by the current detection unit 17 when one self-supporting sub-master unit 2a is added is that of the sub-master units 2a and 2b. Since the number decreases as the number increases, the accuracy in detecting the number of sub-master units 2a and 2b decreases as the number of sub-master units 2a and 2b increases. On the other hand, if the current drawing unit 26 is configured by the constant current circuit 26b, the increase in current detected by the current detection unit 17 when one self-supporting sub-master unit 2a is added is the number of sub-master units 2a and 2b. Regardless of the number of sub-master units 2a and 2b, the number detection accuracy can be ensured. In this reference example , since the current flowing into the power receiving unit 25 is substantially constant, the increase in the current detected by the current detecting unit 17 when one power receiving type secondary master unit 2b is added is the secondary master. It is substantially constant regardless of the number of machines 2a, 2b.

上記構成によれば、電流検出部17は給電部15から流出する電流に基いて副親機2a,2bの台数を検出するので、副親機2a,2bとして受電型副親機2bを含みながらも副親機2a,2bの台数検出の精度が確保される。   According to the above configuration, the current detection unit 17 detects the number of secondary master units 2a and 2b based on the current flowing out from the power supply unit 15, so that the secondary master units 2a and 2b include the power receiving type secondary master unit 2b. In addition, the accuracy of detecting the number of secondary master units 2a and 2b is ensured.

ところで、待機状態で電流引込部26に流れる電流と待機状態で受電部25に流入する電流とが多少異なっていても、その差が副親機2a,2bの台数に対して十分に小さければ副親機2a,2bの台数の検出は可能である。しかし、待機状態の自立型副親機2aと待機状態の受電型副親機2bとでインピーダンスが異なると、副親機2a,2bと親機1又は子器3との間、又は、副親機2a,2b同士の一対一の個別通話時に、自立型副親機2aと受電型副親機2bとの台数構成によって待機状態の副親機2a,2bによる音声信号の減衰量に差が生じ、従って通話時の音量に差が生じることが考えられる。これに対し、本参考例のように、待機状態で電流引込部26に流れる電流を待機状態で受電部25に流入する電流と略等しくすれば、副親機2a,2bと親機1又は子器3との間、又は、副親機2a,2b同士の一対一の個別通話時に、自立型副親機2aと受電型副親機2bとの台数構成による音量の差が生じにくいため望ましい。 By the way, even if the current flowing into the current drawing unit 26 in the standby state and the current flowing into the power receiving unit 25 in the standby state are slightly different, if the difference is sufficiently small with respect to the number of the sub-master units 2a and 2b, The number of master units 2a and 2b can be detected. However, if the impedance differs between the stand-alone self-supporting sub-master unit 2a and the standby power-receiving sub-master unit 2b, the sub-master units 2a, 2b and the master unit 1 or the slave unit 3 or the sub-master At the time of one-to-one individual call between the devices 2a and 2b, a difference occurs in the attenuation amount of the audio signal by the standby sub-master devices 2a and 2b depending on the number of the independent sub-master devices 2a and the power-receiving sub-master device 2b. Therefore, it can be considered that there is a difference in volume during a call. On the other hand, as in this reference example , if the current flowing through the current drawing unit 26 in the standby state is substantially equal to the current flowing into the power receiving unit 25 in the standby state, the sub-master units 2a and 2b and the master unit 1 or child This is desirable because a difference in volume due to the number of units of the self-supporting sub-master unit 2a and the power-receiving sub-master unit 2b is unlikely to occur during a one-to-one individual call with the device 3 or between the sub-master units 2a and 2b.

なお、図1には自立型副親機2aと受電型副親機2bとを1台ずつ示しているが、自立型副親機2aと受電型副親機2bとの一方又は両方を複数台としてもよい。   Although FIG. 1 shows one self-supporting sub-master 2a and one power-receiving sub-master 2b, a plurality of one or both of the self-supporting sub-master 2a and the power-receiving sub-master 2b are shown. It is good.

また、増幅器11d,11e,21d,21eとして可変増幅器を用いる代わりに、固定増幅器と可変減衰器とを組合わせて用いてもよい。   Further, instead of using variable amplifiers as the amplifiers 11d, 11e, 21d, and 21e, a fixed amplifier and a variable attenuator may be used in combination.

さらに、親機1に、ブザーや発光ダイオードを用いて報知部を構成するとともに、制御部13は、検出された副親機2a,2bの台数が0台であるときや所定の規定台数を超えるときに報知部を駆動して使用者に報知するようにしてもよい。上記規定台数は、親機1が対応可能な副親機2a,2bの台数以内とする。この構成を採用すれば、副親機2a,2bの誤接続や、親機1が対応できない台数の副親機2a,2bを接続してしまう多接続の発生が抑制される。   In addition, a notification unit is configured by using a buzzer or a light emitting diode in the master unit 1, and the control unit 13 detects that the number of detected sub master units 2 a and 2 b is 0 or exceeds a predetermined specified number. Sometimes the notification unit may be driven to notify the user. The prescribed number is within the number of secondary master units 2a and 2b that the master unit 1 can handle. By adopting this configuration, it is possible to suppress the erroneous connection of the secondary master units 2a and 2b and the occurrence of multiple connections that connect the number of secondary master units 2a and 2b that the master unit 1 cannot handle.

ところで、受電型副親機2bが待機状態つまり接続スイッチ21fがオフされているときには給電部25が増幅器21d,21eへの電力の供給を停止するものとする場合、接続スイッチ21fがオンされているかオフされているかによって、受電型副親機2bに流れる電流が大きく変化することになる。この場合、電流検出部17において、受電型副親機2bの接続スイッチ21fのオンオフによる電流の変化は、副親機2a,2bの台数による電流の変化に対して非常に大きくなる。従って、制御部13は、電流検出部17に検出された電流に基いて、接続部21fがオンされている(つまり、動作状態の)受電型副親機2bの台数を検出することができる。このことを利用すれば、信号線Lへのノイズの混入によって制御信号に誤りが生じた場合にも受電型副親機2bの誤動作の発生を抑制することができる。   By the way, when the power supply unit 25 stops supplying power to the amplifiers 21d and 21e when the power receiving type secondary master unit 2b is in a standby state, that is, when the connection switch 21f is turned off, is the connection switch 21f turned on? Depending on whether it is turned off, the current flowing through the power receiving type sub-master unit 2b varies greatly. In this case, in the current detection unit 17, the change in current due to turning on / off of the connection switch 21f of the power receiving type sub-master unit 2b becomes very large with respect to the change in current due to the number of sub-master units 2a and 2b. Therefore, the control unit 13 can detect the number of the power receiving sub-master 2b in which the connection unit 21f is turned on (that is, in an operating state) based on the current detected by the current detection unit 17. By utilizing this, even when an error occurs in the control signal due to noise mixed in the signal line L, it is possible to suppress the occurrence of malfunction of the power receiving type sub-master 2b.

具体的には例えば次のような構成とする。すなわち、親機1の制御部13は、動作状態の受電型副親機2bの台数を、電流検出部17に流れる電流に基いて検出し監視する。また、親機1の制御部13は、全ての副親機2a,2bの接続スイッチ21fをオフさせる制御信号である終了信号を制御信号送受信部14に送信させたとき又は終了信号が制御信号送受信部14に受信されたときに、動作状態の受電型副親機2bの台数が0台とならなかった場合には、制御信号送受信部14を制御して終了信号を再度送信させる。   Specifically, for example, the following configuration is adopted. That is, the control unit 13 of the base unit 1 detects and monitors the number of power-receiving type sub-master units 2 b in the operating state based on the current flowing through the current detection unit 17. Further, the control unit 13 of the base unit 1 causes the control signal transmission / reception unit 14 to transmit an end signal which is a control signal for turning off the connection switches 21f of all the sub-base units 2a and 2b, or the end signal is transmitted and received by the control signal. When the number of power-receiving type secondary master units 2b in operation is not zero when received by the unit 14, the control signal transmitting / receiving unit 14 is controlled to transmit the end signal again.

(実施形
本実施形態の基本構成は参考例と共通であるので、共通する構成については同じ符号を付して図示及び説明を省略する。
(Working-shaped state)
Since the basic configuration of this embodiment is the same as that of the reference example , the same configuration is denoted by the same reference numeral, and illustration and description thereof are omitted.

本実施形態では、待機状態で受電部25に流入する電流I(mA)に対し、待機状態で電流引込部26に流れる電流をI/N(mA)としている。ここで、Nは自立型副親機2aの最大接続可能台数よりも大きい数であり、例えば3〜10の範囲内のいずれかの数である。また、制御部13は、電流検出部17によって検出された電流に基いて自立型副親機2aの台数と受電型副親機2bの台数とをそれぞれ検出し、自立型副親機2aの台数と受電型副親機2bの台数との情報を含む台数通知信号を生成する。   In the present embodiment, the current flowing through the current drawing unit 26 in the standby state is I / N (mA) with respect to the current I (mA) flowing into the power receiving unit 25 in the standby state. Here, N is a number larger than the maximum connectable number of self-supporting secondary master units 2a, and is any number within a range of 3 to 10, for example. Further, the control unit 13 detects the number of self-supporting sub-master devices 2a and the number of power-receiving sub-master devices 2b based on the current detected by the current detection unit 17, and the number of self-supporting sub-master devices 2a. And a number notification signal including information on the number of power receiving type secondary master units 2b.

さらに、親機1及び各副親機2a,2bにおいては、制御部13,23は、一斉通話時及び個別通話時に、最後に送信又は受信された台数通知信号に示された副親機2a,2bの台数が多いほど増幅器21d,21eでの増幅率を高くする。また、副親機2a,2bの台数だけでなく自立型副親機2aと受電型副親機2bとの台数構成によっても増幅率を異ならせる。具体的には、副親機2a,2bに占める受電型副親機2bの占める割合が多いほど増幅率を高くする。   Further, in the master unit 1 and the sub master units 2a and 2b, the control units 13 and 23 are connected to the sub master unit 2a and the sub master unit 2a indicated in the last transmitted or received unit notification signal during the simultaneous call and the individual call. The greater the number of 2b, the higher the amplification factor in the amplifiers 21d and 21e. Further, the amplification factor is varied depending not only on the number of sub-master units 2a and 2b but also on the number of the stand-alone sub-master unit 2a and the power-receiving type sub-master unit 2b. Specifically, the amplification factor is increased as the proportion of the power receiving type sub master unit 2b in the sub master units 2a and 2b increases.

上記構成によれば、自立型副親機2aの台数と受電型副親機2bの台数とを個別に検出しない場合に比べ、自立型副親機2aと受電型副親機2bとの台数構成による音量の差を小さくすることができる。また、参考例に比べ、電流引込部26に流れる電流が少ないから、消費電力が低減されている。 According to the above configuration, the number of self-supporting sub-master units 2a and the number of power-receiving-type sub-master units 2b are compared to the case where the number of self-supporting sub-master units 2a and the number of power-receiving-type sub-master units 2b are not detected individually. The difference in volume due to can be reduced. Further, compared with the reference example , since the current flowing through the current drawing unit 26 is small, the power consumption is reduced.

なお、Nは大きい数としたほうが、自立型副親機2aの台数がより多いシステムに対応できるが、Nが大き過ぎると、自立型副親機2aの台数検出の精度が低下するため、Nは5〜7とすることが望ましい。   Note that a larger number of N can cope with a system having a larger number of self-supporting sub-master units 2a. However, if N is too large, the accuracy of detecting the number of self-supporting sub-master devices 2a decreases. Is preferably 5-7.

本発明の実施形態を示すブロック図である。It is a block diagram which shows embodiment of this invention. 同上の電流検出部の1例を示すブロック図である。It is a block diagram which shows an example of an electric current detection part same as the above. 同上の電流引込部の例を示す回路図であり、(a)(b)は互いに異なる例を示す。It is a circuit diagram which shows the example of an electric current drawing part same as the above, (a) (b) shows a mutually different example. インターホンシステムの構成の例を示す概略構成図である。It is a schematic block diagram which shows the example of a structure of an intercom system. 従来のインターホンシステムを示すブロック図である。It is a block diagram which shows the conventional intercom system. 同上の動作を示す説明図である。It is explanatory drawing which shows operation | movement same as the above.

符号の説明Explanation of symbols

1 親機
2a 自立型副親機
2b 受電型副親機
3 子器
11a,21a マイクロホン
11b,21b スピーカ
11d,21d 増幅器
11f,21f 接続スイッチ
12a,22a 個別呼出釦
12b,22b 一斉呼出釦
13,23 制御部
14,24 制御信号送受信部
15 給電部
17 電流検出部
17a 電流検出抵抗
17b 電圧検出部
25 受電部
26 電流引込部
26a 電流引込抵抗
26b 定電流回路
DESCRIPTION OF SYMBOLS 1 Main | base station 2a Self-supporting sub-main | base station 2b Power-receiving-type sub-main | base station 3 Subunit 11a, 21a Microphone 11b, 21b Speaker 11d, 21d Amplifier 11f, 21f Connection switch 12a, 22a Individual call button 12b, 22b General call button 13, 23 Control unit 14, 24 Control signal transmission / reception unit 15 Power supply unit 17 Current detection unit 17a Current detection resistor 17b Voltage detection unit 25 Power reception unit 26 Current drawing unit 26a Current drawing resistor 26b Constant current circuit

Claims (10)

親機と、それぞれ2線の信号線を介して親機に接続され親機との間で同時に通話可能な複数台の副親機とを備えるインターホンシステムであって、
親機及び各副親機は、それぞれ、音声を電気信号である音声信号に変換するマイクロホンと、マイクロホンが出力した音声信号を増幅するとともに信号線を介して送信する送信部と、信号線を介して送信された音声信号を受信して増幅する受信部と、受信部で増幅された音声信号を音声に変換するスピーカと、送信部及び受信部と信号線との接続をオンオフする接続部と、信号線に電気的に接続された制御信号送受信部と、使用者によって操作される操作部と、操作部に加えられた操作に基いて制御信号を生成し制御信号送受信部を制御して信号線を介して送信させるとともに信号線を介して制御信号送受信部に受信された制御信号に基いて接続部をオンオフ制御する制御部とを備え、
副親機として、信号線を介して親機から電力を供給されて電源を生成する受電部を有する受電型副親機と、親機とは別途に電力を供給される自立型副親機とのうち、少なくとも1台の受電型副親機を含み、
自立型副親機は、少なくとも接続部がオフされているときに信号線間に電流を流す電流引込部を備え、
親機は、信号線を介して受電型副親機の受電部へ電力を出力する給電部と、給電部から出力される電流を検出する電流検出部と、信号線に接続された副親機の台数を電流検出部の出力に基いて検出する台数検出部と、台数検出部で検出された副親機の台数を示す台数通知信号を所定の条件で各副親機に送信する台数通知部とを備え、
全ての副親機が同時に親機と通話する際に、親機及び各副親機において、制御部は、送信部及び受信部での音声信号の増幅率を、それぞれ、最後に送信又は受信された台数通知信号における台数が多いほど大きい値となるように制御するものであって、
電流引込部に流れる電流が、受電型副親機の接続部がオフされているときに受電部に流れる電流Iと自立型副親機の台数よりも大きい所定の数Nとを用いてI/Nと表され、
台数検出部は、信号線へ流出する電流に基いて受電型副親機と自立型副親機とのそれぞれの台数を検出し、台数通知信号は、受電型副親機と自立型副親機とのそれぞれの台数を示し、
親機及び各副親機において、制御部は、送信部及び受信部での音声信号の増幅率を、それぞれ、最後に送信又は受信された台数通知信号において副親機に占める受電型副親機の割合が大きいほど高くすることを特徴とするインターホンシステム。
An intercom system comprising a master unit and a plurality of secondary master units that are connected to the master unit via two signal lines, respectively, and can communicate with the master unit simultaneously,
Each of the master unit and each sub-master unit includes a microphone that converts voice into an audio signal that is an electrical signal, a transmitter that amplifies the voice signal output from the microphone and transmits the signal via a signal line, and a signal line. A receiving unit that receives and amplifies the transmitted audio signal, a speaker that converts the audio signal amplified by the receiving unit into audio, a connection unit that turns on and off the connection between the transmitting unit and the receiving unit, and the signal line; A control signal transmission / reception unit electrically connected to the signal line, an operation unit operated by a user, a control signal is generated based on an operation applied to the operation unit, and the control signal transmission / reception unit is controlled to generate a signal line And a control unit that controls on / off of the connection unit based on a control signal transmitted to the control signal transmission / reception unit via the signal line,
As a secondary master unit, a power receiving type secondary master unit having a power receiving unit that receives power from the master unit via a signal line to generate a power source, and a self-supporting secondary master unit that is supplied with power separately from the master unit Including at least one power-receiving sub-master unit,
The self-supporting sub-master unit includes a current lead-in unit that allows a current to flow between the signal lines at least when the connection unit is turned off,
The master unit includes a power feeding unit that outputs power to the power receiving unit of the power receiving type secondary master unit via a signal line, a current detection unit that detects a current output from the power feeding unit, and a sub master unit connected to the signal line. Number detection unit that detects the number of units based on the output of the current detection unit, and a unit number notification unit that transmits a unit number notification signal indicating the number of sub master units detected by the number detection unit to each sub base unit under a predetermined condition And
When all sub-masters talk to the master at the same time, in the master and each sub-master, the controller sends or receives the amplification factor of the audio signal at the transmitter and receiver at the end. Control so that the larger the number in the number notification signal, the larger the value ,
The current flowing through the current draw-in unit is determined by using the current I flowing through the power receiving unit when the connection unit of the power receiving type sub master unit is turned off and a predetermined number N larger than the number of self-supporting sub base units. N,
The number detection unit detects the number of each of the power receiving type sub-master unit and the self-supporting sub-base unit based on the current flowing out to the signal line. And the number of each
In the master unit and each secondary master unit, the control unit determines the amplification factor of the audio signal in the transmission unit and the reception unit, respectively, in the sub-master unit in the secondary master unit in the number notification signal transmitted or received last The intercom system is characterized in that the higher the percentage, the higher .
電流検出部は、給電部から出力される電流に応じた電流が流れる箇所に接続された電流検出抵抗と、電流検出抵抗の両端電圧を検出する電圧検出部とからなることを特徴とする請求項1記載のインターホンシステム。   The current detection unit includes a current detection resistor connected to a location where a current corresponding to the current output from the power supply unit flows, and a voltage detection unit that detects a voltage across the current detection resistor. 1. The intercom system according to 1. 電流引込部は信号線間に接続された電流引込抵抗からなることを特徴とする請求項1又は請求項2記載のインターホンシステム。   3. The intercom system according to claim 1, wherein the current drawing unit includes a current drawing resistor connected between the signal lines. 電流引込部は信号線間に接続された定電流回路からなることを特徴とする請求項1又は請求項2記載のインターホンシステム。   The intercom system according to claim 1 or 2, wherein the current drawing unit includes a constant current circuit connected between the signal lines. 親機に接続され親機及び各副親機とそれぞれ通話可能な子器を備え、
子器は、音声を電気信号である音声信号に変換して親機に出力するマイクロホン部と使用者によって操作される操作部とを備え、
親機は、子器のマイクロホン部が出力した音声信号の信号線への出力を制御部に制御されてオンオフする切替部を備え、
親機の制御部は、子器の操作部に所定の操作が加えられたときに制御信号送受信部を制御して制御信号としての一斉送話信号を信号線を通じて送信させるとともに切替部をオンし、
親機及び各副親機において、制御部は、信号線を通じて一斉送話信号が送信又は受信されたときには接続部をオンするとともに、少なくとも受信部における音声信号の増幅率を、最後に送信又は受信された台数通知信号における台数が多いほど高くすることを特徴とする請求項1〜4のいずれか記載のインターホンシステム。
It is equipped with a slave unit that is connected to the master unit and can communicate with the master unit and each secondary master unit.
The slave unit includes a microphone unit that converts voice into an audio signal that is an electrical signal and outputs the voice signal to the master unit, and an operation unit that is operated by the user.
The master unit includes a switching unit that is controlled by the control unit to turn on and off the audio signal output from the microphone unit of the slave unit,
The control unit of the master unit controls the control signal transmission / reception unit to transmit a simultaneous transmission signal as a control signal through the signal line when a predetermined operation is applied to the operation unit of the slave unit, and turns on the switching unit. ,
In the main unit and each sub-main unit, the control unit turns on the connection unit when a simultaneous transmission signal is transmitted or received through the signal line, and at least transmits or receives at least the amplification factor of the audio signal in the receiving unit. The intercom system according to claim 1, wherein the intercom system is increased as the number of units in the number-of-units notification signal is increased.
親機及び各副親機において、制御部は、親機又は副親機との間で一対一の通話を行う際に、送信部及び受信部における音声信号の増幅率を、それぞれ最後に受信された台数通知信号における台数が多いほど高くすることを特徴とする請求項1〜5のいずれか記載のインターホンシステム。 In the master unit and each secondary master unit, the control unit receives the amplification factor of the audio signal in the transmission unit and the reception unit last when making a one-to-one call with the master unit or the secondary master unit. 6. The intercom system according to claim 1, wherein the intercom system is increased as the number of units in the unit number notification signal increases . 各副親機において、制御部は、子器との間で通話する際に、送信部及び受信部における音声信号の増幅率を、それぞれ最後に受信された台数通知信号における台数が多いほど高くすることを特徴とする請求項記載のインターホンシステム。 In each sub-master unit, the control unit increases the amplification rate of the audio signal in the transmission unit and the reception unit as the number of units in the last received unit number notification signal increases when talking with the slave unit. The intercom system according to claim 5 . 受電型副親機の給電部は接続部がオフされているときには受信部及び送信部への電力の供給を停止するものであって、
親機の制御部は、接続部がオンされている受電型副親機の台数を、電流検出部に流れる電流に基いて検出して監視し、
全ての副親機の接続部をオフさせる制御信号である終了信号が、親機の制御信号送受信部において送信又は受信されたとき、接続部がオンされている受電型副親機の台数が0台にならなかった場合には、制御信号送受信部を制御して終了信号を再度送信させることを特徴とする請求項1〜7のいずれか記載のインターホンシステム。
The power supply unit of the power receiving type sub-master unit stops the supply of power to the receiving unit and the transmitting unit when the connection unit is turned off,
The control unit of the base unit detects and monitors the number of power-receiving type sub-base units whose connection units are turned on based on the current flowing through the current detection unit,
When an end signal, which is a control signal for turning off the connection parts of all the sub-master units, is transmitted or received by the control signal transmitting / receiving unit of the master unit, the number of power-receiving sub-master units whose connection parts are on is zero. The intercom system according to any one of claims 1 to 7, wherein if it does not become a stand, the control signal transmission / reception unit is controlled to transmit an end signal again .
親機は、台数検出部によって検出された副親機の台数が0台であるときに使用者に報知する無接続報知部を備えることを特徴とする請求項1〜8のいずれか記載のインターホンシステム。 The interphone according to any one of claims 1 to 8, wherein the base unit includes a non-connection notification unit that notifies the user when the number of secondary master units detected by the number detection unit is zero. system. 親機は、台数検出部によって検出された副親機の台数が所定の規定台数を上回っているときに使用者に報知する多接続報知部を備えることを特徴とする請求項1〜9のいずれか記載のインターホンシステム The base unit includes a multi-connection notification unit for notifying a user when the number of secondary master units detected by the number detection unit exceeds a predetermined number. Or an intercom system .
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0213337U (en) * 1988-07-08 1990-01-26
JPH0531428U (en) * 1991-09-30 1993-04-23 リズム時計工業株式会社 Door horn anti-theft device
JP2002027444A (en) * 2000-07-04 2002-01-25 Matsushita Electric Works Ltd Colored fm video transmission system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139765A (en) * 1984-07-31 1986-02-25 Toshiba Electric Equip Corp Interphone device
JPH03172060A (en) * 1989-11-30 1991-07-25 Toshiba Lighting & Technol Corp Interphone system
JPH07235940A (en) * 1994-02-23 1995-09-05 Oki Electric Ind Co Ltd Supplied signal compensating method/device and supplied signal processing system
JPH09149408A (en) * 1995-11-22 1997-06-06 Matsushita Electric Works Ltd Camera intercom system
JP3617284B2 (en) * 1997-11-11 2005-02-02 松下電工株式会社 Two-wire multi-station intercom system
JPH11308349A (en) * 1998-04-23 1999-11-05 Matsushita Electric Works Ltd Interphone system, interphone master unit and interphone sub master unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0213337U (en) * 1988-07-08 1990-01-26
JPH0531428U (en) * 1991-09-30 1993-04-23 リズム時計工業株式会社 Door horn anti-theft device
JP2002027444A (en) * 2000-07-04 2002-01-25 Matsushita Electric Works Ltd Colored fm video transmission system

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