JPS6248156A - Telephone holding adaptor - Google Patents

Abstract

PURPOSE:To add the holding function by containing a holding control circuit setting the telephone circuit during talking to the holding state for a prescribed time when a rising of a voltage between the telephone lines is detected into a case. CONSTITUTION:An output of a timer circuit 8b operated by a hold set signal Vs goes to a H level after a prescribed time to output a hold reset signal Vr and a contact S0 is turned OFF by inputting the hold reset signal Vr to a contact control circuit 8c, a resistor R0 is disconnected from telephone lines L1, L2 to rest the holding state at a point of time t2. Thus, the talker moves a telephone set 2 to a suitable position during the holding state T2 to connect is the telephone lines L1, L2. Thus, the telephone setin talking is moved easily and the holding function is added without giving modification to a conventional telephone receptacle and plug by having only to insert a telephone holding adaptor between the telephone receptacle and the plug.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a telephone holding device used in a telephone system in which the telephone call position can be freely selected by connecting the plug of the telephone to one of a plurality of telephone outlets. .

[Background Art] Conventionally, in this type of telephone system, as shown in Figure 5, the telephone position can be freely selected by connecting the plug 3 of the telephone 2 to any one of a plurality of telephone outlets 1. was. By the way, in such a conventional example, there is a problem that during a call, it is not possible to change the telephone outlet 1 to which the telephone 8!2 is connected to change the call position. In other words, if you change the call position by pulling out the plug 3 of the telephone 2 from one telephone outlet 1 and inserting it into the other telephone outlet 1 during a call, the telephone figure #XL,, L2 will be opened, telephone exchange 8! (not shown), since the opening of this telephone line LltL2 is deemed to be the end of the call, there is a problem that the telephone 8!2 cannot be moved during the call.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to put the telephone line on hold when the plug is pulled out, and easily move the telephone during a call. To provide a telephone holding adapter which can add a holding function without changing a normal telephone hook and plug.

[Disclosure of the Invention] (Embodiment) Fig. 1 shows an embodiment of the present invention, in which a telephone holding adapter A is inserted between a telephone outlet 1 and a plug 3 of a telephone system similar to the conventional example. The plug section 3a is connected to the telephone outlet 1, the outlet section 1a is connected to the plug 3, and the outlet section 1a is connected to the outlet section 1a.
Attachment/detachment detection switches 4 for detecting attachment/detachment of the plug 3 are provided at important points in the case 5, and the attachment/detachment detection switch 4 detects the disconnection of the plug 3 and detects the voltage between the telephone lines Ll and L2. In case 5 above, the hold control circuit 9 sets the telephone lines L, L2 in use to an open hold state for a certain period of time when the rising edge of the telephone line L2 is detected.
It is formed by being stored inside.

In addition, as shown on the right side of FIG. 1, the plug part 3a is formed separately and connected to the hold control circuit 9 housed in the case 5 through a signal line of an appropriate length, so that the plug part 3a is connected to the hold control circuit 9 housed in the case 5. Needless to say, it is also possible to use the reserved Agebuta A゛. In addition, the telephone outlet 1, the outlet part 1a of the telephone holding adapter A, the plug 3, and the plug part 3
A mononylar type as shown in FIG. 2 may be used as a. In this case, the attachment/detachment detection switch 4 is, for example,
Although it is designed to be provided on the side of the plug insertion hole of the outlet portion 1a, it goes without saying that it may be provided at any position as long as it is turned on when the plug 3 is connected to the outlet portion 1a.

FIG. 3 shows a specific example of the hold control circuit 9, in which the switch detection circuit 6 detects the state of the attachment/detachment detection switch 4, and
When the plug 3 is pulled out (for example, when the attachment/detachment detection switch 4 is turned on), a extraction detection signal is output. The voltage change detection circuit 7 detects the rise of the voltage between the telephone lines LllL2 and outputs a rise detection signal. The hold circuit 8 is formed of an AND circuit 8a, a timer circuit 8b, and a hold circuit 8c, and the output of the AND circuit 8a to which the rain detection signal is input is the hold set signal Vs.
The signal is inputted to the contact control circuit 8c as well as to the timer circuit 8b, which outputs a pending reset signal Vr after a certain period of time and inputs it to the contact control circuit 8c. The contact control circuit 8C to which both signals Vs and Vr are input closes the contact S in response to the pending set signal Vs. is turned on, a resistor R0 is connected to the telephone #iL, .

Hereinafter, the operation of the embodiment will be specifically explained using the time chart of FIG. 4. Now, in the normal call state T, the hold control circuit 9 is not operating, the contact S0 is turned off, and the resistor R8 is disconnected from the telephone line L2. At this point, it becomes necessary to move the telephone 2, and t
When the plug 3 is pulled out from the connection part 1a of the holding adapter at time 1, the attachment/detachment detection switch 4 is turned on and the disconnection detection signal ("H" level) is output from the switch detection circuit 6. At the same time, the telephone 8!2 is Due to the removal, the voltage V12 of telephone lines L1 and L2 open increases,
A rising detection signal (H” level) is output from the voltage change detection circuit 7. By obtaining the rain detection signal,
The output of the AND circuit 8a of the suspension circuit 8 becomes "H" level, and the suspension set signal Vs is output. When this pending set signal Vs is input to the contact control circuit 8, the contact S is activated. is turned on and resistor R0 is connected to the telephone line, L2,
By forming a DC closed loop through resistor R8, telephones #iL, , L2 are set to a hold state. On the other hand, the timer circuit 8b is activated by the pending set signal Vs.
The output is set to "H" level for a certain period M1 and outputs a pending reset signal Vr, and when this pending reset signal Vr is input to the contact control circuit 8C, the contact S is activated. is turned off and resistor R8 is connected to the telephone line L IIL2
The pending state is reset at tz* and α. Therefore, during this hold message 2T2, the caller moves the telephone 2 to an appropriate position and connects the telephone line to L2 (
By inserting the plug 3 into the outlet 1a of another holding adapter A or the telephone outlet 1), the call can be resumed, and even if the phone W1 is in the middle of a call, the call can be resumed.
2 can be easily moved. In the figure, T2
shows the state in which the plug 3 is pulled out.

Also, when the hold state is reset (time t2) and when the re-call state T4 ends and the handset is hung up (
At the time ti), the voltage V,2 rises, and a rising detection signal is output from the voltage change detection circuit 7, but at this time, the attachment/detachment detection switch 4 remains off, so the pending set signal Vs is not output.

Furthermore, in the state T5 and 8 when the plug 3 is pulled out from the outlet 1a in the no-call state T, the attachment/disconnection detection switch 4 is turned off at time 4, and the disconnection detection signal is output from the switch detection circuit 6. However, since the voltage V12 between the telephone ports #XL and #L2 is constant, the hold set signal Vs is not output.

[Effects of the Invention] As described above, the present invention provides a telephone plug and socket for a telephone system in which the telephone call position can be freely selected by connecting the plug of the telephone to one of a plurality of telephone outlets to which telephone lines are wired. A telephone holding adapter is interposed between the telephone plug and the telephone outlet, and includes a plug part connected to the telephone outlet, a hanger part to which the plug is connected, and a telephone holding adapter disposed in the outlet part to detect attachment/detachment of the plug. At the same time, a disconnection detection switch is installed at a key point on the case, and when the disconnection detection switch detects that the plug is being inserted and pulled out and a rise in voltage between the telephone lines is detected, the telephone line in use is placed on hold for a certain period of time. A hold control circuit is housed inside the case, and by pulling out the phone's plug from the outlet, the phone is automatically placed on hold for a certain period of time, making it easy to move the phone while it is in use. Moreover, by simply interposing the telephone holding device of the present invention between the telephone outlet and the plug, a holding function can be added without changing the normal telephone outlet and the plug. There is.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of one embodiment of the present invention, FIG. 2 is a perspective view of another embodiment, FIG. 3 is a specific circuit diagram of the main part of the same, FIG. 4 is an explanatory diagram of the same as the above, and FIG. The figure is a schematic configuration diagram of a conventional example. 1 is a telephone outlet, 1a is an outlet part, 2 is a telephone set, 3 is an insertion plug, 3a is a plug part, 4 is an attachment/detachment detection switch, 5 is a case, and 9 is a hold control circuit.

Claims (1)

[Claims] (1) A telephone installed between a telephone outlet and a telephone plug in a telephone system where the telephone plug can be freely selected by connecting the telephone plug to one of multiple telephone outlets to which a telephone line is wired. a holding adapter, a plug part connected to the telephone outlet; and an outlet part to which the plug is connected;
Attachment/disconnection detection switches, which are placed in the outlet and detect whether the plug is attached or detached, are installed at important points in the case, and the attachment/disconnection detection switches detect the disconnection of the plug and the rise in voltage between the telephone lines. A telephone holding adapter characterized in that a holding control circuit that sometimes sets a telephone line in use on hold for a certain period of time is housed in the case.