JPH05110726A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To save power by disabling an automatic power supply rising function in the absence of recording paper. CONSTITUTION:The facsimile equipment provided with an automatic reception circuit 14 and a power supply circuit 13 having an automatic power supply interruption function and an automatic power supply raising function raising a power supply with a reception signal by the automatic reception circuit 14 is provided with a recording paper detection circuit 15 and a power supply interrupt continue means disabling the automatic power supply raising function of the power supply circuit 13 even in the presence of an automatic reception signal by the automatic reception circuit 14 when no recording paper is present.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine having an automatic reception function.

[0002]

2. Description of the Related Art Conventionally, if an operation is not performed for a certain period of time in order to save power, the power is automatically switched to a power saving mode. For example, a facsimile machine provided with an automatic power-off function for turning off the power of a printer has been implemented. There is. In such a device, when transmission is performed from the outside after switching to the power saving mode, reception becomes impossible. Therefore, when a ringing signal comes from the line, the power saving mode is automatically switched. It is common to add an automatic power-on function that powers up the functional units.

[0003]

In the facsimile apparatus having the automatic power-off function and the automatic power-on function as described above, when the call signal comes from the line in the power saving mode, the recording paper is not set. Even if it is, the power saving mode is automatically released, and the power supply to each functional unit is automatically turned on. That is, there is a problem in that the power saving mode is canceled even in a state where reception is not possible, and the power saving mode is not switched to until a certain period of time elapses, resulting in wasteful power consumption.

[0004]

A facsimile apparatus having an automatic receiving circuit and a power supply circuit having an automatic power-off function and an automatic power-on function for turning on a power supply by a signal received by the automatic receiving circuit is recorded. A paper detection circuit and a power interruption continuation means for disabling the automatic power-on function of the power supply circuit even when there is an automatic reception signal from the automatic reception circuit when there is no recording paper are provided.

[0005]

When the automatic power-off function shuts off the power after a certain period of inactivity, the recording paper detection circuit detects when the automatic reception circuit detects that a ringing signal has come from the line. If the absence of the recording paper is detected, the power-off continuation means does not turn on the power, and thus the power can be turned on only in the receivable state where the recording paper is set to achieve power saving. It is possible.

[0006]

An embodiment of the present invention will be described with reference to the drawings. First, the overall outline will be described with reference to FIG. A modem 2 is connected to the public line 1, and the modem 2 is connected to a central processing unit (hereinafter referred to as CPU) 4 via a bus line 3. A ROM 5 in which a processing program is stored and a RAM 6 that operates as a temporary storage device are connected to the CPU 4. Also, the CPU 4
Is connected to functional parts such as a keyboard 7, a display unit 8 displayed as an LCD, an image printing unit 9, an image reading unit 10, and an electronic circuit unit such as an image compression unit 11 and an image decompression unit 12. There is. A power supply circuit 13 is connected to each of these components. This power circuit 1
3 is connected via the bus line 3 to receive an auto power off signal.

A bell detecting circuit 14 as an automatic receiving circuit is connected to the public line 1, and a recording paper detecting circuit 15 is connected to the bell detecting circuit 14.
The bell detection circuit 14 and the recording paper detection circuit 15 are connected to the CPU 4 via the bus line 3. Further, the recording paper detection circuit 15 is connected so as to give an auto power-on signal to the power supply circuit 13.

Next, details of the bell detection circuit 14, the recording paper detection circuit 15, and the power supply circuit 13 will be described with reference to FIG. First, the bell detection circuit 14 includes a photocoupler 18 including a light emitting diode 16 and a phototransistor 17, and the light emitting diode 16 is connected to the public line 1 via a capacitor 19 and a resistor 20. The phototransistor 17 is connected to the CPU 4 and the recording paper detection circuit 15.

Therefore, the recording paper detection circuit 15 includes the reflection type photo sensor 21. The photosensor 21 includes a first light emitting diode 22 indicated as LED ₁ , a second light emitting diode 23 indicated as LED _2, and a phototransistor for receiving light reflected from the recording paper from these light emitting diodes 22, 23. And 24. Then, the phototransistor 24 sends a recording paper detection signal to the CPU 4, and the light emitting diodes 22 and 23 are connected to the power supply circuit 13.

However, the power supply circuit 13 has an automatic power-off function and an automatic power-up function, and is composed of a flip-flop 25, a battery 26, a power switch 27, a relay 28, and a control transistor 29. Become. That is, the set terminal (SET) of the flip-flop 25 is connected to the phototransistor 24 of the photosensor 21 and the battery 26 via the resistor 30. The toggle terminal of the flip-flop 25 is connected to the power switch 27 and also to the battery 26 via a resistor 31. In addition, the flip
The Q output terminal of the flop 25 is connected to the control transistor 29 via the resistor 32, and the reset terminal (RESET) is connected to the CPU 4 so as to receive the auto-off signal from the CPU 4.

Next, the battery 26 is connected to the second light emitting diode 23 of the recording paper detection circuit 15 via the resistor 33 and is also connected to the relay 28. This relay 28 has its power supply Vcc for various circuits.
Is connected to the output side of the relay 28, and the first light emitting diode 22 is connected via a resistor 33.
It is connected to the.

In such a structure, the power switch 2
When 7 is turned on, a signal is momentarily input to the toggle terminal of the flip-flop 25, the Q output becomes H level, and the control transistor 29 becomes conductive. As a result, the relay 28 is energized, the battery 26 is connected to various circuits, and the power of Vcc is supplied. At this time, the first light emitting diode 22 emits light by the power supply of Vcc, and if there is a recording paper, the phototransistor 21 receives the reflected light from the recording paper and conducts it, and the flip-flop 25
To the relay 28 to keep the relay 28 on.

However, the operating state of the facsimile apparatus is constantly monitored by the CPU 4, and if it is not operated for a certain period of time set by a timer (not shown), the CP
An auto power off signal is generated from U4. That is,
The automatic power-off function operates and the flip-flop 25 is reset. As a result, the control transistor 29 is turned off and the relay 28 is turned off. As a result, the power supply of Vcc to each functional unit is cut off, and the light emitting diode 22 also stops emitting light. As a result, the power saving mode is entered.

However, even in this case, the power from the battery 26 is supplied to the second light emitting diode 23. However, since there is no call signal from the public line 1, the photocoupler 18 is in the cutoff state.
The light emitting diode 23 does not emit light.

In this state, when there is a call signal from the public line 1, the light emitting diode 16 emits light, whereby the bell is detected by the CPU 4, and at the same time, the phototransistor 17 becomes conductive and the light emitting diode 23 emits light. To do.

Here, the operation of the power supply circuit 13 differs depending on whether the recording paper is set or not. That is,
If the recording paper is not set, the light emitting diode 23
Even if the light is emitted, the phototransistor 24 is not provided with the reflected light from the recording paper, so that the phototransistor 24 does not become conductive. Therefore, the reset state of the flip-flop 25 continues and the power supply circuit does not recover. That is, this means that the power interruption continuation means has operated. Then, it is in a standby state while the recording paper is replenished.

On the other hand, when the recording paper is set when there is a calling signal from the public line 1, the light emitting diode 23 emits light by the electric power from the battery 26, and the light of the light emitting diode 23 is reflected by the recording paper. Then, the phototransistor 24 is turned on, so that the phototransistor 24 is turned on, a set signal is given to the flip-flop 25 to turn on the control transistor 29, and the relay 28 is turned on to supply electric power to each functional unit. As a result, the power saving mode is released and the automatic power-on function is activated. Then, the automatic reception mode is set. The outline of such operation is shown in FIG.

[0018]

As described above, the present invention is a facsimile equipped with an automatic receiving circuit and a power supply circuit having an automatic power-off function and an automatic power-on function for turning on the power by a signal received by the automatic receiving circuit. The apparatus is provided with a recording paper detection circuit and a power-off continuation means for disabling the automatic power-on function of the power supply circuit even when there is an automatic reception signal from the automatic reception circuit when there is no recording paper, so it is not operated. After a certain period of time, the power is cut off by the automatic power-off function, but in that state, when the automatic reception circuit detects that a call signal comes from the line, the recording paper detection circuit detects the absence of recording paper. The power is not turned on by the power-off continuation means, so that the recording paper is set in the receivable state. Achieving power saving rises power only hand has the effect that called it is.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an outline of a facsimile device.

FIG. 3 is a flowchart showing an outline of operation.

[Explanation of symbols]

 13 power supply circuit 14 automatic reception circuit 15 recording paper detection circuit

Claims (1)

[Claims] 1. A facsimile machine having an automatic receiving circuit and a power supply circuit having an automatic power-off function and an automatic power-on function for powering on a signal received by the automatic receiving circuit, in a facsimile apparatus. A facsimile machine comprising a power interruption continuation means for disabling the automatic power-on function of the power circuit even when there is an automatic reception signal from the automatic reception circuit when there is no recording paper.