JPS59138160A - Facsimile device - Google Patents

Abstract

PURPOSE:To detect the state of a receiver even during communication by providing a power supply to be switched to a telephone set side by the control from a control section in the communication state when a telephone line is connected to a facsimile device. CONSTITUTION:When the facsimile device is in the communication state, a system control section 5 changes over a relay 4 to an M-contact side. Although a closed loop of the telephone line is held by a choke coil 2 in this case, a telephone set 6 is disconnected from a line 1. Then, the system control section 5 changes over a relay 13 from a B-contact to the M-contact. Thus, a current having a voltage the same as a DC voltage applied from a DC power supply 12 to the telephone line is applied to a telephone set 6. That is, this is the same that the line 1 and the telephone set 6 are connected. Thus, the system control section 5 detects whether a handset is hooked on or off depending whether a contact rl1 of a relay 7 is closed or not.

Description

TECHNICAL FIELD The present invention relates to a facsimile machine, and more particularly to a facsimile machine having a function of detecting whether or not the receiver is off the hook during communication.

Prior Art FIG. 1 shows a schematic structure of a conventional facsimile machine. In FIG. 1, reference numeral 1 denotes a telephone line, which is connected to a transmitting/receiving section 3 via a retardation coil (RET coil) 2. As shown in FIG. A relay (CML) is installed between the blocking line 2 and the telephone line 1 to switch the line between a telephone and a facsimile machine.
4 is provided, and this relay 4 and the transmitting/receiving section 3 are controlled by a system control section 5.

On the other hand, the reference numeral 6 is a telephone set, which is configured to be connectable to the line 1 side via the relay 4. That is, by switching the relay 4, the telephone line 1 can be switched to the telephone 6 or the transmitting/receiving section 3 on the fax machine/IJ side.

The symbol cml- is a contact of the relay 4, the symbol B is a contact on the telephone side, and the symbol M is a contact on the Fakunmi IJ side.

Further, the telephone set 6 is connected to a ring signal detection section 8 via a relay 7 for detecting the state of the receiver, and the ring signal detection section 8 is connected to the system control section 5.

Connected to the system control unit 5 are a speaker 9 that generates an operator ring tone, a display unit 10 that displays that the operator is being called, a telephone button 11 that indicates that the operator has answered, and a contact γt1 of the relay 7. has been done.

With the above-described structure, a DC voltage of about 50 V is usually applied to the telephone line 1, and the exchange is operated by closing or opening the line 1.

That is, since the relay 4 is normally connected to the B contact, the telephone line 1 and the telephone 6 are connected via the relay 7. If you pick up the handset (not shown) in this state,
Switch H8 in telephone 6 is closed and current flows.

The exchange also detects a request for a call and a response from a called party.

When current flows through the relay 7, its contact γt1 closes, so that the system control unit 5 of the facsimile machine can detect that the receiver is picked up.

On the other hand, if a facsimile machine is communicating, relay 4
is connected to the M contact, so that the DC loop is held by the blocking wire 2 of the facsimile machine. However, since the B contact is open, no current flows to the telephone 6 side, and the state of the receiver cannot be detected.

Further, in a facsimile machine having a function of calling an operator before and after communication, when the mode is set to the operator calling mode, control is performed according to the flow shown in FIG.

That is, in step S1, a pseudo bell sound is sounded,
[Pick up the handset and press the button. 4 will light up. The process then proceeds to step S2, where a timer of, for example, 15 seconds is set.

Then, the process proceeds to step S3, and it is determined whether or not the button has been pressed by the operator. If the button is not pressed, the process advances to step S4, and it is detected whether a timeout has occurred. If not timeout, step S
Return to 3. If the timeout has occurred, the relay 4 is switched to the B contact side and the line is switched to the telephone side in step S5. After waiting for a short time in step S6, the hook status of the telephone is checked in step S7. Then, in step S8, it is detected whether the hook is off or on, and if it is off, step S9
The process proceeds to step S8, where an alarm is issued to notify that the receiver is off the hook, and the process returns to step S8.

On the other hand, if it is determined in step S3 that the button has been pressed, the process proceeds to step SIO, where the pseudo bell sound is stopped and the display is turned off. After waiting about 1 second in step 811, the relay 4 is switched to the telephone side in step S12. The reason why relay 4 is returned to the telephone side after waiting about 1 second is to prevent the line from being disconnected even if the operator presses a button by mistake and then lifts the handset, since the state of the handset cannot be detected during communication. This is to make it happen. The process then proceeds to step S13, and after waiting for a short time, the control operation is stopped.

If it is determined in step S8 that the telephone is on the hook, the process proceeds to step 814;
Stops the off-hook alarm sound and ends the control operation.

As mentioned above, the conventional fan/mm device cannot detect whether the receiver is off the hook during communication.
If the operator presses the confirmation button without picking up the receiver when making a call, the line will be disconnected, making it impossible to alert the operator.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and an object of the present invention is to provide a facsimile device configured to be able to detect the state of a receiver even during communication. It is said that

EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.

3 and 4 illustrate one embodiment of the present invention. In each figure, the same or corresponding parts as in FIGS. 1 and 2 are given the same reference numerals, and their explanations are omitted. do.

As is clear from FIG. 3, in this embodiment, in order to detect the state of the handset of the telephone set that has been disconnected from the line, the DC power supply 12 is used to supply power to the telephone set.
is provided. This DC power supply 12 is connected to the telephone 6 side via a relay 13 for connecting the telephone disconnected from the line to the power supply. γt2 is this relay 1
This is the third contact point.

Next, the operation of this embodiment configured as above will be explained.

When nothing is being done, the contact point of relay 4 is cm.

is connected to the B contact side, and the relay 13 is also connected to the B contact side of the contact γt2, so the telephone line is connected to the telephone 6 via the relay 7. Since a DC voltage of about 50 V is applied to the telephone line 1, when the receiver is hung up, the hook switch HS is open and no current flows through the relay 7.

Therefore, the contact γt1 of the relay 7 is open, and the system control unit 5 recognizes that the telephone receiver is hung up.

When the handset is removed, the hook switch of the telephone is closed, so that current is restored to the relay 7, its contact γt1 is closed, and the system control unit 5 knows that the handset has been removed.

On the other hand, when the facsimile machine is communicating, the system control section 5 switches the relay 4 to the M contact side. At this time, the closed loop of the telephone line is maintained by the blocking wire ring 2, but the telephone set 6 is disconnected from the line 1. In this state, no current flows through the relay 7 regardless of the state of the handset, so the system control unit 5 cannot detect the state of the handset in a random situation.

Therefore, the system control unit 5 switches the relay 13 from the B contact to the M contact. Then, a current having the same voltage as the DC voltage applied to the telephone line is supplied from the DC power supply 12 to the telephone 6. In other words, the state is the same as when line 1 and telephone 6 are connected. Accordingly, the system control unit 5 can detect whether the receiver is on the receiver depending on whether the contact γt1 of the relay 7 is closed or not.

On the other hand, Fig. 4 shows the control operations when an operator is called before and after communication.As can be seen from Fig. 4 and compared with Fig. 2, the control operations have only slightly changed. Recognize.

That is, step 815 and step 816 are added between steps S4 and 85 in FIG.
Steps 817 and 818 are added between Step 3 and Step 810, Step 811 is removed, and Steps 819 and 820 are added between Steps 810 and 812.

This is because the aforementioned DC power supply 12 and relay 13 have been added. Assuming that the relay 4 is switched to the M contact side and the -relay 13 is also switched to the M contact side so that the state of the receiver can be detected, in step S3,
When the operator presses the confirmation button, step 81
7, the state of the hook switch is inspected, and in step 818, it is determined whether the hook switch is on. If it is, the process proceeds to step S4, and the pseudo bell sound is not stopped and is displayed. Step S2 without erasing
Wait for the handset to be picked up for a certain period of time equal to the timer set in .

On the other hand, if it is determined in step S4 that the timeout has occurred, the process proceeds to step 815, where the relay 13 is switched to the B contact side, and in step 816, the relay 13 is switched for a short period of time, for example, 100m5. After waiting for ec, step S5
Proceed to and return relay 4 to the telephone side. After this, the control operation is similar to that shown in FIG. Waiting 1QQ m seconds after switching the relay is a waste of time for the relay to complete its operation.

On the other hand, if it is determined in step 818 that the hook switch is off, the process proceeds to step S10, the pseudo bell sound is stopped, the display is turned off, the relay 13 is switched to the B contact in step 819, and the relay 13 is switched to the B contact in step 820 for a short time. After waiting, the process proceeds to step S12, where the same control as shown in FIG. 2 is performed, and the control operation is ended.

In this way, by simply installing a DC power source and a relay that switches this power source to the telephone side in the conventional device, it is possible to detect the state of the handset during communication, and when the operator calls, the operator presses the confirmation button without lifting the handset. It is possible to call the operator's attention without disconnecting the line.

Effects As is clear from the above explanation, according to the present invention, when the telephone line is connected to the facsimile machine side and is in a communication state, a structure is provided in which a power supply is switched to the telephone side under control from the control unit. Because of this, the same voltage as the telephone line can be supplied to the telephone even during communication, and the state of the receiver during communication can be reliably detected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining a conventional structure, and FIG. 2 is a flowchart explaining a conventional control operation. DESCRIPTION OF SYMBOLS 1...Telephone line 2...Block line 3...Transmission/reception section 4,7.13...Relay 5...System control section 6...Telephone 8...Call signal detection section 1
2...DC power supply. Patent applicant Canon Co., Ltd. Kujira Figure 3 Figure 4

Claims (1)

[Claims] When communicating between a telephone line and a facsimile device, a power supply is provided that is connected to the telephone via a switching member, and the state of the handset can be detected by supplying a predetermined voltage to the telephone even during communication. A facsimile device characterized in that it is configured to be able to.