JP3401895B2 - Hands-free intercom with extension calling function - Google Patents

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 with an extension function for operating an extension call button to ring a hands-free intercom in each room.

[0002]

2. Description of the Related Art This type of hands-free intercom does not have a handset and is equipped with a loudspeaker type call switch, a microphone and a speaker. A call from an intercom subunit can be answered by simply operating the call switch. , You can talk as it is.

By the way, the conventional structure of such a hands-free intercom has only an extension call button, but it is only for mass calling, and the hands-free intercom installed in one room is installed in another room. It was not possible to make a call by designating a hands-free intercom.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object thereof is to call a hands-free intercom by freely calling another hands-free intercom in the same system. It is to provide a hands-free intercom with a new structure that can be used.

A second object of the present invention is to provide a simple hands-free intercom having a simple structure which can realize an extension calling function by a simple structure provided with one extension calling button.

[0006]

A hands-free intercom having an extension calling function according to the present invention, which is proposed to achieve the above object, has an extension calling button and an extension number setting switch. By providing the extension call button, the number of times of operation of the extension call button is changed to output different extension call signals so that individual calls can be made.

[0007] In addition, by changing the operation holding time of the extension call button, it has been a common extension call button,
You can call all at once.

[0008] Hands-free intercom with the extension call, as in claim 2, Preparations and extension display lamp for displaying when a call extension, and a call destination display control circuit for displaying the callee Eteori, extension When the call button is operated
First, the caller's hands-free interphone
In this configuration, an extension indicator lamp that is pre-assigned to the callee determined according to the number of times the extension call button is operated and the operation holding time is turned on or blinked.

A hands-free intercom having an extension calling function according to a third aspect of the invention is replaced with an extension indicator lamp,
A display is provided and when the extension call button is operated
The operated caller hands-free intercom
Characterized by displaying the callee as character information on the display of
It is

A hands-free intercom having an extension calling function according to a fourth aspect is provided with a display section ,
In the mutual hands-free intercom inside, its display
The other hands-free intercom that is the destination of the call can be identified and displayed.

In the hands-free intercom having the extension calling function according to the fifth aspect , when the call button is operated in response to a call from another intercom including the intercom subunit, the hands-free call control circuit has a predetermined short duration. It is equipped with a control means that drives only for the contact time, and when the call button is operated again during the short time during which the hands-free call control circuit is driven, keeps driving for a predetermined long call time. There is.

[0012]

According to the hands-free intercom with the extension calling functions of the present invention, in claim 1, by changing the number of operations extension call buttons, you can call individually other hands-free intercom, further extension If the operation of the call button is held for a predetermined time or longer, other hands-free intercoms can be called all at once.

Further, in claim 2, the extension call button is operated.
When calling other handsfree intercoms
Lights up or blinks the extension indicator lamp to
The callee can be displayed as character information on the display unit.

[0014] According to claim 4, other hands-free intercom as a call destination can be displayed identification on the display unit.

[0015] According to claim 5, in conjunction to the call button can control the power drive of the hands-free call control circuit.

[0016]

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

FIG. 1 shows the external structure of the hands-free intercom of the present invention.

The hands-free intercom A has a main body 10
Is provided with a speaker SP in the upper part and a push button type call switch 6 provided with a microphone MIC in the lower part, and an extension call button 1 is provided between the call switch 6 provided with a call lamp 6a and the speaker SP. ing.

SW is a hands-free intercom A
It is an extension number setting switch for setting an extension number to be assigned to, and in the embodiment, the cover of the main body 10 is removed and the dip switch is exposed. In this case, the extension number can be set by assigning it to numbers such as 1, 2, 3, and 4.

Such an extension number setting switch may be composed of a dial switch or a slide switch other than the DIP switch.

Reference numeral 7 is a call operation display lamp, and when the extension number set by the extension number setting switch SW is called, it is turned on or blinks to call .

Such a call operation display lamp may be replaced by an extension display lamp (see FIG. 6) described later. In this case, the extension display lamp corresponding to the extension number of the called hands-free intercom A. L1 to L3 are lit or blinked.

In such a hands-free intercom A, the caller who operates the extension call button 1 at the time of calling the extension can output the ringing sound for the called party from the speaker SP, and the called party can It collates with a preset extension number, and outputs a ringing tone from the speaker SP when they match.

In addition, since a ringing tone is output from the speaker SP in response to a call from the intercom subunit, when the callee hears this ringing tone and operates the call switch 6, an operation confirmation tone is output. After that, the call lamp 6a lights up,
The hands-free call control circuit (see FIG. 2, FIG. 3, and FIG. 4) is driven for a preset time, and it becomes possible to talk with the intercom subunit.

When a call is made after calling in this way and the call set time of the hands-free intercom A has passed, the call lamp 6a is turned off and the driving of the hands-free call control circuit is stopped. Although the call is terminated, in order to stop driving the hands-free call control circuit during the call, the call switch 6 is operated while the call lamp 6a is lit.

In the present invention, by changing the number of times the extension call button 1 is operated, the hands-free intercoms having extension numbers set in advance by the extension number setting switch SW can be individually called . Further, if the operation holding time of the extension calling button 1 is lengthened and the operation holding is performed for a preset time or longer, it is possible to call other hands-free intercoms all at once .

FIG. 2 is a block diagram showing the structure of the internal circuit of the hands- free intercom.

In any of the figures, the hands-free intercom A is connected to each other by a call line La for calling and a control line Lb for controlling calling and the like, and has a control means 4 constituted by a CPU. I have it. The extension call button 1 is connected to the operation number discriminating circuit 2, and here, the number of times the extension call button 1 is operated within a predetermined time is discriminated and the extension call signal generating circuit 3 determines the number of times the extension call button 1 is operated. The extension call signal distinguished according to the above is sent to the control line Lb.

The ringing tone detection circuit 9 detects the extension ringing signal transmitted through the control line Lb, and the control means 4 matches the extension ringing signal with the one set by the extension number setting switch SW. It is determined whether or not there is a ringing tone, and if they match, the ringing tone generating means 8 is activated and the ringing tone is output from the speaker SP.

Here, the ringing tone output from the ringing tone generating means 8 may be set to the same tone color or melody common to all the hands-free interphones constituting the system, but it is assigned to each hands-free intercom. The extension numbers may be associated with each other.

A speaker SP and a microphone MIC are connected to the hands-free call control circuit 5, and the speaker SP
In addition to the voice at the time of a call, the call originator can output the extension ringing sound on the monitor, and the callee can output the extension ringing sound as it is.

According to the hands-free intercom A having such a configuration, when the extension call button 1 is operated to make a call, for example, "ping-pong" is given to another hands-free intercom set to the extension number 1. , Ping-pong, ping-pong for the other hands-free intercom set to extension number 2, and "ping-pong, ping-pong, ping-pong" ringing for the other hands-free intercom set to extension number 3. Monitor output from the speaker SP (claim 3).

FIG. 3 is a block diagram showing the basic structure of the hands-free intercom according to claim 1. When the extension call button 1 is operated, it is called all at once when it is held for a predetermined time or longer. The operation holding time determination circuit 14 for this purpose is added.

[0034] Figure 4 shows with a block diagram a basic configuration of a hands-free intercom as claimed in claim 2, in comparison with FIG. 2, the called display control circuit 1
1, the extension display lamps L1 to Ln are added. In this invention, the callee display control circuit 11 determines the number of times the extension call button 1 has been operated.
When the extension call signal generation circuit 3 receives a signal from the operation holding time determination circuit 14, any of the extension display lamps L1 to Ln provided corresponding to the extension call signal, or in the case of simultaneous call. Turns everything on or blinks. Therefore, the caller can light or blink the extension display lamps L1 to Ln corresponding to the extension number assigned to the hands-free intercom A of the callee, so that the callee can be easily confirmed. .

The display of the called party may be performed by using the display section 12 composed of an LCD or the like as shown in FIG. 5, instead of lighting or blinking the extension display lamps L1 to Ln. In this case, the extension number assigned to the callee can be displayed as character information.

FIG. 5 shows an external configuration diagram in which a display unit 12 is provided on a part of the main body 10, and an identification display such as an extension number assigned to a hands-free intercom that is a party during a call is displayed on the display unit 12. Since they are displayed mutually, the other party of the call can be easily confirmed .

[0037] When I went to extension calls Hence the call, by blinking an extension display lamp which is provided to each of both of the hands-free intercom to be a call of interest, which is to be able to confirm the destination of the call . Further, during a call through the hands- free intercom A, the corresponding one of the extension display lamps L1 to L3 is turned on so that the other party can be identified.

FIG. 6 shows a state in which the hands-free intercom assigned the extension number 1 is called from the hands-free intercom assigned the extension number 3 in the case of performing such lighting control. In this state, Both of the extension display lamps are blinked so that the extension indicator lamp L1 assigned to the callee at the call source and the extension indicator lamp L3 assigned to the caller at the callee are blinked, and are turned on when a call is made. Reference numeral 13 is a name plate assigned to the extension number.

FIG. 7 shows the basic operation of the hands-free intercom set forth in claim 5 . Since the basic structure of the hands-free intercom is as described above, its details are omitted.

The features of this hands-free intercom are:
The point is that the power supply of the hands-free call control circuit is interlocked with the operation of the call switch 6.

When the call switch 6 is operated when a call is made, the hands-free call control circuit 5 is driven for a predetermined short contact time (about 10 seconds), and a call is made again until the time elapses. When the switch 6 is operated, the hands-free call control circuit 5 is further driven for a call time longer than the contact time (about 1 minute) and a call can be made.
Steps 100 to 113 in FIG. 7 show the basic operation in this case with a time chart.

With such a configuration, the power supply of the hands-free call control circuit 5 can be cut off in a short time when it is sufficient to call and call the other party, so that environmental sounds and voices in the room can be heard by the other party. Without being heard by the side,
Energy saving can be achieved. Further, when a call is made, the power of the hands-free call control circuit 5 is continuously supplied for a call time longer than that at the time of contact by simply operating the call switch 6 after calling.

[0043]

According to the present invention, since it has a simple structure provided with a common extension call button, it is possible to provide a smart and simple hands-free intercom in appearance.

According to the hands-free intercom of the present invention having the features described in claims 1 to 5 , the following effects can be obtained.

According to the present invention, by changing the number of times the extension call button is operated, another hands-free intercom can be called individually, and if the extension call button is operated and held for a predetermined time or longer, the other hands-free intercom can be called. You can call intercoms all at once.

Further, in claim 2, the extension call button is operated.
When calling other handsfree intercoms
Lights up or blinks the extension indicator lamp to
The callee can be displayed as character information on the display unit.

[0047] According to claim 4, other hands-free intercom as a call destination can be displayed identification on the display unit.

[0048] In claim 5, in conjunction to the call button can control the power drive of the hands-free call control circuit.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a basic configuration of a hands-free intercom having an individual calling function.

FIG. 3 is a diagram showing the present invention having an individual calling function and a general calling function .
3 is a block diagram showing the basic configuration of a hands- free intercom of FIG.

FIG. 4 is a block diagram showing a basic configuration of a hands-free intercom including an extension call display lamp.

FIG. 5 is an external configuration diagram of a hands-free intercom of the present invention including a display unit.

FIG. 6 is an explanatory diagram of a usage state of a hands-free intercom in which an extension display lamp is blinked and lit to make a call or a call. .

FIG. 7 is a flowchart showing a basic operation procedure of the hands-free intercom in which the power control of the hands-free call control circuit is linked to the operation of the call switch.

[Explanation of symbols]

A handsfree intercom SP speaker MIC microphone La call line Lb control line L1 to L3 extension indicator lamps SW extension number setting switch 1 extension call button 2 Operation count circuit 3 Extension ringing signal generation circuit 4 Control means 5 Hands-free call control circuit 6 Call button 7 Calling operation display lamp 8 Ring tone generation means 9 Ring detection circuit 10 Hands-free intercom body 11 Callee display control circuit 12 Ringer detection circuit 14 Operation holding time discrimination circuit

Continuation of the front page (56) Reference JP-A-1-91564 (JP, A) JP-A-2-230891 (JP, A) JP-A-3-284042 (JP, A) JP-A-58-51664 (JP , A) JP-A 2-188094 (JP, A) JP-A 63-294057 (JP, A) JP-A 59-80054 (JP, A) Actual flat 4-53350 (JP, U) Actual flat 5-39057 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04M 9/00-9/10 H04M 1/723-1/737

Claims (5)

(57) [Claims] 1. A hands-free intercom that responds to a call by operating a call button in response to a call from an intercom subunit. An extension call button, an extension number setting switch, and a hands equipped with a loudspeaker type microphone and speaker. A free call control circuit, an operation number discriminating circuit for counting and discriminating the number of times the extension calling button is operated, and an extension calling signal of a preset type is generated according to the counting result counted by the operation number discriminating circuit. Holds the operation by counting and distinguishing the operation hold time of the extension call signal generation circuit and the extension call button
If it is determined that the time has exceeded the specified time,
Line call signal generation circuit is all hands-free intercom
When holding an operation that outputs a call signal for calling all at once
A hands-free intercom with an extension calling function that includes an inter-division circuit . 2. The hands-free intercom having the extension calling function according to claim 1, further comprising an extension display lamp and a callee display control circuit, and when the extension call button is operated , the operation is performed.
A hands-free intercom that has been created and has an extension calling function that is configured to blink the extension indicator lamp that is pre-assigned to the called party according to the number of times the extension calling button is operated and the operation holding time. Free intercom. 3. A hands-free intercom having an extension calling function according to claim 2 , further comprising a display section in place of the extension display lamp.
When the extension call button is operated,
Called on the display of the hands-free intercom
A hands-free intercom with an extension calling function that is characterized by displaying text information . 4. The hands-free intercom having the extension calling function according to claim 1, wherein the hands-free intercoms are in communication and the extension number
A hands-free intercom with an extension calling function that has a configuration that displays the other party's ID. 5. When a call button is operated in response to a call from another intercom including an intercom subunit, the call circuit is driven for a predetermined short time while the call circuit is driven for a short time. during, when it is operated call button again, claim 1 including a control means adapted to only drive holding the speaking circuit long time predetermined,
A hands-free intercom with the extension calling function described in 3 .