JPH07123158A - Hand-free interphone and hand-free interphone system for multiple housing using the interphone - Google Patents

Abstract

PURPOSE:To provide the hand-free interphone, where the speaking time extending operation can be performed by displaying a notice when approaching time-up for speaking, and the hand-free interphone system using the hand-free interphone. CONSTITUTION:A speaking time-up notice means 1 having a speaking time-up indicator lamp which is lit or flickered at the time of elapse of a prescribed time before expiration of the preliminarily set speaking time after the start of speaking, a hand-free speech control circuit 2 which connects speaking means Sp and Mic to a speech line L by a speech switch SW and disconnects speech means Sp and Mic from the speech line L at the time of expiration of the preliminarily set speaking time, and a control means 3 which has a speech extending switch SW and a timer means and inhibits the disconnecting operation between speech means Sp and Mic and a speech line L1 due to the hand-free speech control circuit 2 at the time of operating the speech extending switch SW and keeps speech means Sp and Mic connected to the speech line L only for a preliminarily set time are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hands-free intercom system and a hands-free intercom system constructed by combining it with a lobby intercom system.

[0002]

2. Description of the Related Art Hands-free intercoms of this type are
When you call from an intercom etc., if you answer the call by operating the call switch and make a call, the call will be forcibly ended after a preset time has elapsed. However, there was a problem that it would be interrupted if it lasted for a long time.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the conventional hands-free intercoms, and the preset call time is almost expired. At times, the first object is to provide a hands-free intercom that can give a notice by lighting or blinking a lamp or outputting an alarm and can extend the call time.

A second object of the present invention is a combination of the hands-free intercom of the present invention as set forth in claim 1 and a lobby intercom, wherein the hands-free intercom communicates with the lobby intercom. After extending the call on the hands-free intercom side, when the lobby intercom side ends the call,
An object of the present invention is to provide a hands-free intercom system in which the hands-free intercom side immediately disconnects the connection between the communication means and the communication line.

A third object of the present invention is to combine the hands-free intercom of the present invention as set forth in claim 1 and a lobby intercom, and to make a hands-free call between the hands-free intercom and the lobby intercom. It is an object of the present invention to provide a hands-free intercom system in which the connection between the communication means and the communication line is immediately cut off when there are no more people on the lobby intercom side after the call is extended on the intercom side.

[0006]

A hands-free intercom according to claim 1, which is proposed to achieve the above object, has a predetermined time after the start of a call until a preset call time elapses. When the call time has expired, the call time expiration indicator has a call time expiration indicator light and the call switch is used to connect the call means to the call line. It has a hands-free call control circuit that cuts off the connection to the line, a call extension switch, and a timer means.When this call extension switch is operated, the blocking operation by the hands-free call control circuit is prohibited and preset. And a control means for holding the call means connected to the call line for a certain period of time.

Further, the hands-free intercom according to claim 2 is further provided with a talk time expiration warning alarm generating means for simultaneously generating a warning sound indicating the talk time expiration when the talk time expiration warning light is turned on or blinking. Has become. The hands-free intercom system according to claim 3 is a system for an apartment house that is configured by combining the hands-free intercom according to claim 1 and a lobby intercom installed at a common entrance, and is a hands-free intercom. On the side, a voice level discriminating circuit that discriminates the voice signal level from the lobby intercom, and this voice level discriminating circuit connects the call means and the call line when the level of the voice signal drops for a predetermined time. And a control means for shutting off.

Further, the hands-free intercom system according to claim 4 is a system for an apartment house which is configured by combining the hands-free intercom according to claim 1 and a lobby intercom installed at a common entrance. Then, a human body detection sensor is attached to the lobby intercom side, and when the output of the human body detection sensor is kept in the detection off state for a predetermined time, the connection between the communication means and the communication line on the lobby intercom side is cut off. The control means is provided.

[0009]

According to the hands-free intercom of the first aspect, in response to the call of the intercom or the lobby intercom, the call switch is operated to start the call, until the preset call time elapses. When the predetermined time has elapsed, the talk time expiration indicator light is turned on or blinks to notify the state. Therefore, if you look at this state and operate the call extension switch, the hands-free call control circuit is prohibited from cutting off the connection between the intercom and the call line, and the hands-free call control circuit returns to the state at the beginning of the call. Returning to this, the communication means is connected to the communication circuit, and that state is maintained until a predetermined time has elapsed. After that, until the preset call time elapses, the communication means of the intercom and the call line are kept connected, and if the call time elapses,
The connection between the calling means and the calling line is cut off.

According to the has-free intercom of the second aspect, the notice sound is output in accordance with the lighting operation of the call time expiration indicator lamp, so that the call time expiration can be more reliably notified. According to the hands-free intercom system of claim 3, when a call is made with the lobby intercom and the call is terminated on the lobby intercom side, the intercom side can also terminate the call at the same time. Therefore, it is possible to prevent the hands-free intercom from being unnecessarily left in a call state after the call ends.

According to the hands-free intercom system of claim 4, when a call is made with the lobby intercom and the call is terminated on the lobby intercom side, the output of the human body detection sensor is turned off for a predetermined time. Since the connection between the call means and the call line is cut off when it is detected, it is possible to prevent the lobby intercom from being unnecessarily left in a call state after the call ends.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an external view showing an example of a hands-free intercom of the present invention, and FIG. 2 is a block diagram showing a configuration of an internal circuit of the intercom. As shown in the figure, the hands-free intercom A of the present invention is provided with a speaker SP on the upper part of a portable body, and a call switch SW having a microphone MIC and a call indicator light 1c below. Further, reference numeral 1b is a call time expiration indicator light composed of an LED or the like. In this embodiment, a call extension switch is not provided individually, but is operated by operating the call switch SW during a call. . An intercom 8 serving as a calling device on the other side is provided with a call button 8a and is connected to the hands-free intercom A through a call line L and a call line S.

If the call switch SW is operated when a call is made from the intercom 8 or the like, a call means such as a microphone MIC and a speaker SP is connected to the call line L to start a call, but is operated during a call. If it does, it functions as a call extension switch. That is, when the call switch SW is operated during a call, the call blocking operation by the hands-free call control circuit 2 is prohibited, and the connection between the call means and the call line is resumed until the preset call time elapses. Retained.

FIG. 2 is a block diagram showing the configuration of the internal circuit of the hands-free intercom. In the figure, SW
Is a call switch that functions as a call extension switch,
Reference numeral 1 is a call time expiration notice means for lighting or blinking the call time expiration indicator lamp 1b by a lighting drive circuit 1a, 2 is a hands-free call control circuit, 3 is control means composed of a CPU, and 4 is bidirectional. An amplifier 5 is an intercom, and an audio signal from an intercom is a speaker Sp, an amplifier A.
An audio switching unit for switching to MP, 6 is an amplifier for amplifying an audio signal input from the microphone Mic, and 7 is a speaker Sp.
It shows an amplifier for amplifying the audio signal output to.

3 (a) and 3 (b) realize a call extension switch by operating the call switch during a call.
Moreover, the operation | movement explanatory drawing at the time of using a call indicator as a call time expiration indicator by changing the lighting mode of a call indicator is shown. Explaining with reference to the figure, when the call switch SW is operated when a call is made from a doorphone or the like, the call indicator lamp 1c is turned on to indicate that a call is in progress. When the call switch SW is further operated during such a call, the call switch functions as a call extension switch, and the hands-free call control circuit 2 disconnects the call means Sp and Mic from the call line L. Ban. Thus, although the call time is extended, when the set time elapses, the call indicator light 1c blinks to give a notice of the time expiration.

In the example shown in FIG. 2, the hands-free intercom A is provided with the call time expiration notice alarm generating means 8, so that when the call time expires, the control means 3 causes the call time expiration notification means 1. By the above operation, the talk time expiration indicator lamp 1b is made to blink, and at this time, the announcement sound indicating the talk time expiration is output from the speaker SP (claim 2).

FIG. 4 is a block diagram showing the configuration of the internal circuit of the hands-free intercom, which is the main part of the hands-free intercom system of the present invention (claim 3). The basic configuration is the same as the circuit diagram shown in FIG. 2, but the system is configured by connecting a lobby intercom instead of the doorphone. The feature of this system is that a voice signal level discriminating circuit 9 for discriminating the level of a voice signal sent from a lobby intercom (not shown) is provided on the hands-free intercom A side on the output side of the voice switching unit 5.

According to such a configuration, when the call between the hands-free intercom A and the lobby intercom is finished, the voice signal level discrimination circuit 9 detects that the voice signal has disappeared, so that the state is predetermined. When the time continues, the connection between the speaker Sp and the microphone Mic and the communication line L is cut off, whereby the hands-free intercom A can be quickly returned to the standby state.

FIG. 5 is a block diagram showing the internal circuit of the lobby intercom which constitutes the essential part of the hands-free intercom system of the present invention. The hands-free intercom system is configured by combining the above-mentioned hands-free intercom of the present invention and the lobby intercom B. The feature of this system is on the lobby intercom B side, and a human body detection sensor 10 is attached to the lobby intercom B side. When the output of the human body detection sensor 10 is kept in a detection off state for a predetermined time, control is performed. The means 11 is adapted to cut off the connection between the call means on the lobby intercom side in the call state and the call line. In addition, 12 is an internal power supply of the lobby intercom, 13 is a display section, 14 is a key scanning section, 15 is a control signal transmitting section, and 16 is a call section for performing call control. It is shown. With such a configuration, when a call is made with the lobby intercom B and the lobby intercom B side ends the call, the intercom A side can also end the call at the same time. After that, it is possible to prevent the intercom A from being unnecessarily left in a talking state.

[0020]

[Effect] According to the hands-free intercom of claims 1 and 2 of the present invention, when the preset call time is almost over, the call time expiration indicator light is turned on or blinks. You can continue the call by operating the switch.

According to the intercom system of the third and fourth aspects, when the call with the lobby intercom is completed, the hands-free intercom and the lobby intercom can be quickly returned to the call-completion state.

[Brief description of drawings]

FIG. 1 is an external configuration diagram showing an embodiment of a hands-free intercom of the present invention.

FIG. 2 is a block diagram showing a configuration of an internal circuit of the hands-free intercom of the present invention.

FIG. 3 is an operation explanatory diagram of a call extension switch and a call time expiration notice light.

FIG. 4 is a block diagram showing a configuration of an internal circuit of the hands-free intercom in the hands-free system of the present invention.

FIG. 5 is a block diagram showing a configuration of an internal circuit of a lobby intercom in the hands-free intercom system of the present invention.

[Explanation of symbols]

 A Hands-free intercom B Lobby intercom C Alarm monitoring panel 1 Talk time expiration notice means 2 Hands-free call control circuit 3 Control means 4 Bidirectional amplifier 8 Talk time expiration notice alarm generation means 9 Voice signal level discrimination circuit 10 Human body detection sensor SW call Extension switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Hirota 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (4)

[Claims] 1. A hands-free intercom for forcibly ending a call after a preset call time has elapsed after the call has started. A predetermined time elapses after the call starts until the preset call time elapses. When the call time has expired, the call time expiration indicator has a call time expiration indicator light and the call switch is used to connect the call method to the call line. It has a hands-free call control circuit that cuts off the connection to the line, a call extension switch, and a timer means.When this call extension switch is operated, the operation of disconnecting the call means and the call line by the hands-free call control circuit is performed. And a control means for holding the call means connected to the call line for a preset time. Lens-free intercom. 2. The hands-free intercom according to claim 1, further comprising a talk time expiration warning alarm generating means for simultaneously generating a warning sound indicating the call time expiration when the call time expiration warning light is turned on or blinking. 3. The hands-free intercom according to claim 1 is combined with a lobby intercom installed at a common entrance, and the hands-free intercom side determines the audio signal level from the lobby intercom. A housing complex having a voice signal level discriminating circuit and a control means for disconnecting the connection between the communication means and the communication line when the voice signal is lowered to a certain level for a predetermined time by the sound signal level discrimination circuit. Hands-free intercom system for Android. 4. The hands-free intercom according to claim 1 is combined with a lobby intercom installed at a common entrance, and a human body detection sensor is attached to the lobby intercom side. A hands-free intercom system for a housing complex, which is provided with control means for cutting off the connection between the call means on the lobby intercom side in the call state and the call line when the output is held in the detection off state for a predetermined time.