JPH08163297A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To much more reduce power consumption without having any limitation on security standard by operating a central control part with power from a main power source and charging a secondary battery. CONSTITUTION: In standby state, the main power source is turned off, and power supply is controlled by a secondary battery 29. Further, when the main power source is operated, the main power source is controlled corresponding to the result calculated by a microcomputer 28 itself based on an instruction from the CPU. When electric charges stored in the secondary battery 29 are a little, the main power source is not turned off although there is the off instruction of the main power source from the CPU, the main power source is continuously turned on for charging the secondary battery 29 and when the secondary battery 29 is completely charged and the main power source off instruction comes from the CPU, the main power source is turned off by the microcomputer 28. Thus, the number of times for turning on the main power source just for charging the secondary battery 29 is extremely decreased and power is prevented from being consumed more than needed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A facsimile machine having a standby state uses a switching power supply or the like as its power supply. In the facsimile apparatus, conventionally, the power source is always turned on and used during standby and during operation.

In this type of facsimile apparatus, in order to reduce power consumption, the primary winding of the insulation transformer built into the switching power supply is directly controlled by a plurality of means such as a call signal from a telephone line. Is already known (hereinafter, referred to as "first conventional example").

As another conventional example for reducing the power consumption of a facsimile machine, a sub power supply for standby is provided separately from the switching power supply (main power supply), and only the sub power supply is turned on during standby. A technique for turning on the main power source only during operation has already been proposed (for example, Japanese Patent Laid-Open No. 4-37615: hereinafter, "second
Conventional example ”).

The second conventional example has a main control unit for controlling the operation of the main body of the apparatus and a sub control unit for controlling the main power supply, and the sub power supply is always in the on state regardless of whether it is in standby or in operation. Therefore, power is always supplied to the sub control unit. Also,
In the second conventional example, since power is supplied from the main power supply to the main control unit, the main control unit controls the main body of the device (main power supply is turned on or off) during operation when the main power supply is in the on state. (Including instructions). Therefore, the sub-control unit to which power is supplied from the sub-power source functions as a slave control unit that completely complies with the command from the main control unit during operation. That is, for example, when the operation ends and the main control unit issues an instruction to turn off the main power to the sub control unit, the sub control unit immediately stops the main power according to the off instruction.

[0006] Furthermore, the applicant of the present application has proposed a further new system for reducing the power consumption during standby (Japanese Patent Application No. 5-101108: hereinafter, "3rd
Conventional example ”).

In the third conventional example, a main power source control section for controlling start and stop of a main power source composed of a switching power source, and a central control section for supplying system power from the main power source to perform system control of the entire apparatus. The secondary battery supplies electric power to the main power supply control unit during standby and the main power supply during operation. That is, during standby, the main power supply is stopped, and the main power supply control unit operates by the power supplied from the secondary battery. During operation, while the control signal from the main power supply control unit is being supplied to the main power supply, the main power supply is turned on, and the main power supply controls the operation of the main body of the apparatus.

[0008]

However, in the first conventional example described above, the primary winding of the main power source is directly controlled by a plurality of means, and therefore, in terms of safety standards, various circuits are used. There is a problem that there is a limitation and the circuit becomes complicated.

In the second conventional example, the auxiliary power source is always turned on regardless of whether it is in standby or in operation, so that power consumption loss in standby cannot be completely eliminated. Further, since the sub power supply is always turned on during standby, there is a problem that radiation noise or the like adversely affects other electronic devices.

Further, in the third conventional example, since the secondary battery supplies electric power to the main power source control unit during standby, the electric power to the main power source control unit depends on the state of charge of the secondary battery. In some cases, the supply may not be sufficient. Therefore, for example, when the secondary battery is exhausted and power cannot be sufficiently supplied to the main power supply control unit, when the main power supply control unit starts the main power supply for some reason, the main power supply is The central control unit controls the operation of the main body of the apparatus, but when the operation is completed and an instruction to turn off the main power source is issued from the central control unit to the main power source control unit, the main power source control unit is controlled by the off instruction. Turn off the main power immediately. Therefore, there occurs a situation in which the main power source has to be turned on again only to charge the secondary battery. And, such a thing also frequently repeats charging and discharging of the secondary battery, which leads to deterioration of the secondary battery and also repeats more than necessary on / off operations for the main power source. There is a problem that the efficiency of the entire system is poor and a desired reduction in power consumption cannot be achieved.

The present invention has been made in view of these problems, and is not restricted by any safety standard.
It is an object of the present invention to provide a facsimile device that can further reduce power consumption.

[0012]

To achieve the above object, a facsimile apparatus according to the present invention comprises a central control section for controlling each part of the apparatus main body, and a main power supply for supplying a predetermined electric power to the central control section. A main power supply control unit for controlling the operation of the main power supply; and a secondary battery capable of supplying power to the main power supply control unit. In the standby state, the operation of the main power supply is stopped to stop the operation of the secondary power supply. A battery for supplying electric power to the main power supply control unit; and, when the main power supply is operating, the main power supply control unit operates the central control unit with the power from the main power supply. The main power supply has a charging means for charging the secondary battery, and further comprises an operation control means for controlling the operation of the main power supply based on a calculation result of the main power supply control section. There is.

If necessary, the main power source control unit is provided with a solar cell capable of supplying electric power, and in the standby state, the operation of the main power source is stopped to at least one of the secondary battery and the solar cell. Is a power supply means for supplying power to the main power supply control unit, and when the main power supply is operating, the main power supply control unit controls the central control by power from at least one of the main power supply and the solar cell. At least one of the main power source and the solar battery may have a charging unit that charges the secondary battery while operating the unit, and the main power source, the solar battery, and the secondary battery are prioritized in order. It is also preferable that power is supplied to the main power supply control unit. In this case, it is preferable that the secondary battery is charged with electric power obtained by subtracting electric power supplied to the main power supply control unit from electric power of the solar battery.

Further, in the above facsimile apparatus according to the present invention, when the main power supply receives a start signal from the main power supply control unit in the standby state, the main power supply is started and power is supplied to the main power supply control unit. Is supplied and a standby charging state in which the secondary battery is charged is entered.

Further, it has a voltage detecting means for detecting the voltage of the secondary battery, and further has a timer means if necessary, and the voltage of the secondary battery has a first predetermined value when in the standby state. The standby charging is performed when at least one of the following conditions is detected: the voltage detection unit detects that the voltage has dropped below the voltage, or no power is supplied from a battery other than the secondary battery for a certain period of time when the standby state is set. When the voltage of the secondary battery is equal to or higher than a second predetermined voltage when in the standby charging state, or when the standby charging state is in the standby charging state, power is supplied from the main power source for a certain period of time. It is characterized in that the standby state is entered in at least one of the cases where the supply is continued.

Further, the present invention has timer means, and when the main power supply is operating and the parts other than the main power supply do not operate for a certain period of time, the standby state is entered. The secondary battery is charged when the main power supply is operating, and when the main power supply is in the operating state, the main power supply control unit issues a main power supply off command from the central control unit. When received, the main power supply control unit controls the main power supply. Further, the main power-off command is an operation end signal for notifying the end of the operation.

Further, the present invention is characterized in that the main power source is composed of switching means, and the main power source control section controls ON / OFF of the switching means based on a command from the outside.

Further, the present invention has at least one or more switch means, and further has call signal detection means for detecting a call signal as necessary, and the switch means is input when in the standby state. When at least one of the case where the call signal is received or the case where the call signal is received, the main power source is activated and the central control unit operates.

Further, the switch means is at least one of an original detection switch for detecting whether there is a transmission original, a communication start switch for starting a communication operation, and an off-hook detection switch for detecting an off-hook of the handset. The original detection switch is characterized in that
It is characterized by being composed of mechanical switches.

The main power supply controller stops the operation of the main power supply when the main power supply receives a stop signal from the main power supply controller while the main power supply is operating. Is characterized in that the stop signal is output in accordance with a signal from an external switch means.

[0021]

According to the above construction, the main power supply can be activated by the call signal or the input signal from the external switch means.

When the secondary battery is exhausted and power cannot be sufficiently supplied to the main power supply control unit, the main power supply control unit and the main power supply are activated by some activation factor, and the central control unit controls the main body of the apparatus. Controlling the operation, when the operation is completed and the main power supply control unit issues a main power supply off command to the main power supply control unit,
The main power source control unit controls the operation of the main power source based on the main power source off command and the charging state of the secondary battery. Therefore,
When the secondary battery is exhausted, the main power supply can be kept on for charging until it is fully charged, and the secondary battery is not frequently charged.

[0023]

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

FIG. 1 is a block diagram showing an embodiment of a facsimile apparatus according to the present invention. The facsimile apparatus has a central control unit (CPU) via a bus line 1.
2, ROM 3, reading unit 4, recording unit 5, RAM 6, non-volatile RAM 7, character generator (CG) 8, operation unit 9, display unit 10, modem unit 11, network control unit (NCU) 12 are connected to each other. ing. Also,
A communication line 13 and a telephone 14 are connected to the NCU 12, respectively. The telephone set 14 is equipped with a handset, a speech neckwork, a dialer, a ringer, a numeric keypad, a one-touch key, and the like.

The CPU 2 is composed of a microprocessor and the like, and controls the above-mentioned respective components such as the reading unit 4 and the recording unit 5 based on a predetermined arithmetic program stored in the ROM 3.

The reading unit 4 comprises a DMA controller, an image processing IC, an image sensor such as a contact sensor (CS), a CMOS logic IC, etc., and binarizes the data read by the image sensor under the control of the CPU 2. The binarized data is sequentially sent to the RAM 6. The recording unit 5 includes a DMA controller, an inkjet recording device, a CMOS logic IC, and the like, and takes out the recording data stored in the RAM 6 and outputs it as a hard copy.

The RAM 6 stores the binarized data read by the reading unit 4, the binarized data demodulated via the NCU 12 and the modem unit 11, the binarized data recorded in the recording unit 5, and the communication line 13. Stores the binarized data to be output to.

The non-volatile RAM 7 stores desired data to be saved such as a speed dial even when the AC power input to the facsimile apparatus is cut off.
The CG 8 is a ROM that stores characters such as JIS code and ASCII code in advance, and outputs character data corresponding to a predetermined code by 2-byte data as needed under the control of the CPU 2.

The operation unit 9 includes a mechanical document detection switch (provided on the document conveyance path) 15, a hooking switch 16 for off-hook or on-hook, and a start key (not shown) for starting transmission / reception of images. When,
Equipped with a mode selection key (not shown) that specifies the operation mode such as fine, standard, and automatic reception during transmission / reception, and a numeric keypad and one-touch key (not shown) for dialing. When these documents are detected or hooked. When the switch 16 or each of the above keys is pressed, an ON signal is input to the sub control unit 17. That is, the operation unit 9 has a built-in key matrix circuit 18, which identifies the above-mentioned various keys and the like input by the key matrix circuit 18 and inputs an ON signal to the sub-control unit 17. Here, the reason why the mechanical original detection switch is used instead of the photo sensor using the light emitting element for the original detection switch is that power is not consumed during standby for original insertion. Further, instead of the mechanical document detection switch 15, a reed switch whose power consumption can be almost ignored may be used.

The display unit 10 is a pictogram liquid crystal display (LCD) that displays 7-segment for time display and various modes.
19, a dot matrix LCD (not shown) for displaying 5 × 7 dots 16 digits × 1 line, and a light emitting diode (L
ED) and the like.

The modem section 11 is composed of a G3 or G2 modem and a clock generation circuit connected to these modems, modulates the transmission data stored in the RAM 6 under the control of the CPU 2, and communicates via the NCU 12. Line 1
3 and outputs the analog signal from the communication line 13 to N
It is supplied via the CU 12, and the analog signal is modulated into predetermined binary data and stored in the RAM 6.

The NCU 12 switches the communication line 13 to either the modem section 11 or the telephone set 14 under the control of the CPU 2 and connects it. The NCU 12 is provided with a calling signal detecting means and receives an incoming signal when a calling signal is detected. Sub control unit 1
Send to 7.

Specifically, as shown in FIG. 2, the NCU 12 includes a pair of photo couplers, that is, a photo signal coupler 20 for detecting a ringing signal and a photo coupler 21 for detecting an off-hook of the telephone set 14. , 21
Are connected to the power supply Vcc through the current limiting resistors 22 and 23, respectively, and their output signals ciDET and (hoff-hsw) are connected to the sub control unit 17. Further, the calling signal detecting photocoupler 20 can be connected to the communication line 13 via the modular jack 24, and the on-hook detecting photocoupler 21 can be connected to the telephone set 14 via the modular jack 25. Therefore, when the calling signal detecting photocoupler 20 receives the calling signal through the communication line 13, the low-level output signal ciDET (incoming signal) is input to the sub control unit 17. When the off-hook detecting photocoupler 21 detects the off-hook state of the telephone set 14, a low-level output signal (hoff-hsw) is input to the sub-control unit 17.

Further, as shown in FIG. 1, the CPU 2 is connected to a reset voltage detection circuit 26 for resetting the CPU 2, and the reset voltage detection circuit 26 and the CPU 2 are powered by a main power source 27. Is supplied. Specifically, as shown in FIG. 3, power is supplied from the main power supply 27 (+ 5V) to the power supply port Vin of the reset voltage detection circuit 26 and the power supply port Vdd of the CPU 2, while the power is supplied from the output port RE. The output signal is input to the reset port RESET of the CPU 2. When the power supply voltage supplied from the main power supply 27 is 4.5 V or less, the output port RE outputs a low level signal, and when the power supply voltage is 4.5 V or more, the time required for resetting the CPU 2 Keeps low level signal only, CPU
After resetting 2, it operates so as to output a high level signal. The output signal acPW output from the output port RE of the reset voltage detection circuit 26 is input to the sub control unit 17 and monitored. The CPU SI / O of the CPU2
The information from the sub-control unit 17 is constantly input to.

The sub-control unit 17 controls the power supply to each part (block) of the main body of the apparatus. Specifically, as shown in FIG. 4, an 8-bit 1-chip microcomputer is used. The main power supply control unit (hereinafter, simply referred to as “microcomputer”) 28, a capacitor-type secondary battery 29, and a solar battery 30 are provided.

The microcomputer 28 is capable of operating with ultra-low power consumption, has a built-in timer means, and exchanges data with the CPU 2 via the serial interface port sI / O. That is, for example, when the calling signal detection photocoupler 20 detects a calling signal during standby, its output signal ciDET (low level) is input to the input port IN12 of the microcomputer 28,
The microcomputer 28 recognizes this and outputs the PS signal from the output port OUT5 as a low level signal, and the main power supply 27
Start up. Then, the activation factor information of the main power source 27 is sent to the CPU via the serial interface port sI / O.
2 and the CPU 2 controls each block according to the information. Further, when the off-hook detecting photocoupler 21 detects the off-hook of the telephone 14 during standby, a low-level output signal (hoff-hsw) is input to the input port IN11 of the microcomputer 28, and the microcomputer 28 recognizes it. Then, the PS signal from the output port OUT5 is output as a low level signal to activate the main power supply 27. Then, similarly to the above, the activation factor information of the main power source 27 is transferred to the C via the serial interface port sI / O.
The data is sent to the PU 2, and the CPU 2 controls each block according to the information. In addition, the input port IN of the microcomputer 28
The key matrix circuit 18 of the operation unit 9 is connected to the output ports 0 to 3 and the output ports OUT0 to OUT3, and the pressed keys are identified by the software control of the microcomputer 28. Further, the common port COM0-4 of the microcomputer 28 and the segment ports SEG0-11 are provided with the pictogram LCD1 of the display unit 10.
9 is connected, and the microcomputer 28 uses the pictogram LCD 1
9 is controlled so that desired display can be performed with little power consumption even when the main power supply 27 stops operating.

Then, the output port OU of the microcomputer 28
An input port SEL of a DC-DC converter (hereinafter, simply referred to as “converter”) 31 is connected to T4. Then, the power supply port Vin of the converter 31
Are connected to three power supply sources. That is,
The power supply port Vin is connected to the + 5V supply source of the main power supply via the backflow prevention Schottky barrier diode 32, connected to the solar cell 30 via the backflow prevention diode 33, and connected to the secondary battery via the resistor 34. It is connected to 29. Of these three power supplies supplied to the power supply port Vin, the one from the main power source 27 is set to 4.8V by the Schottky barrier diode 32, and the one from the solar cell 30 is 4.6V by the diode 33. The secondary battery 29 depends on its charge state. Therefore, when the main power supply 27 is in the ON state, the power supply from the main power supply 27 becomes the most dominant, the secondary battery 29 is charged through the resistor 34, and the power supply Vcc is supplied through the power output port Vout of the converter 31. Supply power to.
At this time, since the solar cell 30 has a low potential, no current flows from the solar cell 30 to the secondary battery 29. Further, when the main power supply 27 is in the off state but power is supplied from the solar cell 30, that is, when the main power supply 27 is not operating but light energy is supplied, the potential of the secondary battery 29 is When the potential is higher than that of the solar cell 30, the secondary battery 2 is supplied through the power output port Vout of the converter 31.
Power is supplied to the power supply Vcc from the solar cell 9, but not from the solar cell 30. On the other hand, when the potential of the solar cell 30 is higher than the potential of the secondary cell, power is supplied from the solar cell 30 to the power source Vcc through the power source output port Vout and the secondary cell 29 is charged through the resistor 34. To be done. further,
When the main power supply 27 is off and the solar cell 30 is not supplied with power, power is supplied from the secondary battery 29 to the power supply Vcc through the power supply output port Vout. In this way, the priority order of power supply to the sub control unit 17 is set to the main power source 2
By setting 7, the solar battery 30, and the secondary battery 29 in this order, the most efficient and ideal power supply can be realized.

When the input voltage is higher than the output voltage, the converter 31 acts as a series regulator, and when the input voltage is lower than the output voltage, the converter 31 also acts as a step-up switching regulator and a series regulator. Then, either 5V or 3V can be selected as the output voltage, and when the input port SEL is at the high level, 5V is output from the output port Vout,
At the low level, 3V is output from the output port Vout. When the voltage input to the supply voltage port Vin of the converter 31 is 0.9 V or more, either 5 V or 3 V is always output from the output port Vout.

A solar cell voltage detection circuit 35 is provided between the solar cell 30 and the input port IN8 of the microcomputer 28 to detect the voltage of the solar cell 30. When the voltage detected by the voltage detection circuit 35 is 2.5 V or higher, the output port OUT becomes high level, and 2.
When the voltage is 5 V or less, the output port OUT becomes low level and is input to the input port IN8 of the microcomputer 28, and the microcomputer 28 determines whether or not power should be supplied from the solar cell 30.

Further, a discharge voltage detection circuit 36 is provided between the secondary battery 29 and the input port IN9 of the microcomputer 28, and the secondary battery 29 and the input port IN13 of the microcomputer 28 are provided.
A full-charge voltage detection circuit 37 is provided between and to detect the charging / discharging state of the secondary battery 29. That is, when the voltage detected by the discharge voltage detection circuit 36 is 1.2 V or higher, a high level signal is output from the output port OUT of the discharge voltage detection circuit 36, and when it is 1.2 V or lower, a low level signal is output. , These output signals are input to the input port IN9 of the microcomputer 28. Then, by this, the microcomputer 28 determines whether or not the secondary battery should be charged. When the voltage detected by the full-charge voltage detection circuit 37 is 4.8 V or higher, a high-level signal is output from the output port OUT of the full-charge voltage detection circuit 37, and when it is 4.8 V or lower, a low-level signal is output. Is output,
These output signals are input port IN13 of the microcomputer 28.
Is input to Then, by this, the microcomputer 28 determines whether or not the secondary battery 29 is fully charged.

Furthermore, the power output port Vout of the converter 31 is connected to the power port Vdd of the microcomputer 28, and the microcomputer reset voltage detection circuit 38 is provided between the power output port Vout and the reset port RESET of the microcomputer 28. And an output signal from the output port RE of the microcomputer reset voltage detection circuit 38 is input to the reset port RESET. That is, when the voltage output from the power supply output port Vout of the converter 31 is 2.7V or less, a low level signal is output from the output port RE of the reset voltage detection circuit 38 and 2.7V.
When the above is reached, the low-level signal output is maintained for a long time by the timer means incorporated in the microcomputer for the time required for resetting the microcomputer 28, and after the microcomputer 28 is reset, the high-level signal is output.

The sub-control unit 17 having the above-mentioned configuration is N
When an incoming signal from the CU 12 or a document detection signal or an ON signal from the operation unit 9 is input, the activation signal is transmitted to the main power source 27.

The main power supply 27 comprises an AC input switching power supply, and it is possible to control the on / off of the switching from the outside. The main control power supply 27 supplies and stops the electric power in response to a start signal and a stop signal from the sub control unit 17, respectively. To do
As a result, efficient power supply can be performed, and on / off from the outside can be easily performed.

FIG. 5 is a circuit configuration diagram showing details of the main power supply.

That is, the AC input is the filter circuit 39,
Isolation transformer 42 via rectifier circuit 40 and smoothing circuit 41
And is switched by the FET 43. In the figure, 44 is a primary winding, 45 is a secondary winding, and 46 is an auxiliary winding. The FET 43 is connected to the oscillation control circuit 48 via the resistor 47. The oscillation control circuit 48 is an IC that controls the oscillation of the primary side of the isolation transformer 42, and its power supply Vdd is supplied by the auxiliary winding 46. From the secondary winding 45 of the isolation transformer 42, the first and second rectification /
Power supplies of +24 V and +5 V are supplied to each block via the smoothing circuits 49 and 50, respectively. Furthermore, a current detection circuit 51 is connected to the first rectifying / smoothing circuit 49, and an overvoltage detecting circuit 52 is connected to the first and second rectifying / smoothing circuits 49 and 50. And these current detection circuits 51
The output signal of the overvoltage detection circuit 52 is the photocoupler 5
It is fed back to the oscillation control circuit 48 via 3, 54. Further, the oscillation control circuit 48 uses the secondary side current to generate PW.
The M control is performed, and when the overvoltage is detected by the overvoltage detection circuit 52, the entire system is shut off.

The PS signal is input to the oscillation control circuit 48 via the photo coupler 55. That is, when the PS signal is low level, the transistor 56 is turned on and a current flows through the photocoupler 55. Then, the photocoupler 55 performs current-voltage conversion to input the input port I of the oscillation control circuit 48.
A low-level signal is input to N1, and then the output port OUT1 of the oscillation control circuit 48 oscillates based on the low-level signal, so that the primary side oscillates through the FET 43 and supplies power to the secondary side to supply main power. 27 turns on. On the other hand, P
When the S signal is high level, the transistor 56 is turned off, so that the high level signal is input to the input port IN1 of the oscillation control circuit 48. Due to the high level signal, the output port OUT1 of the oscillation control circuit 48 does not oscillate and the FET4
3 is turned off, the oscillation of the primary side is stopped, and the operation of the main power supply 27 is stopped. For example, when the hooking switch 16 (FIG. 4) is pressed during standby, an ON signal is output from the key matrix circuit 18 of the operation unit 9, the microcomputer 28 recognizes that the hooking switch 16 is pressed, and the output port OUT5 of the microcomputer 28 is detected. To low level, ie P
The S signal is set to the low level to activate the main power supply 27, the information is sent to the CPU 2 through the serial interface sI / O, the CPU 2 controls the NCU 12, and the device goes into the off-hook state. Incidentally, 58 to 60 are resistors for limiting current, 61 and 62 are voltage dividing resistors, and the photocoupler 55 also performs insulation on the primary side and the secondary side.

Next, the operation of the facsimile apparatus will be described in more detail.

6 and 7 are flow charts showing the operation in the communication standby state. Here, the communication standby state means a state in which communication is possible at any time when an operation command for communication is issued by the main system.

In FIG. 6, when the input of AC power is started (step S1), the main power supply 27 is turned on (step S1).
2) Initialize the microcomputer 28 of the sub control unit 17 (step S3). Then, when the initialization of the microcomputer 28 is completed, the communication standby state is set.

In the communication standby state, first, the charging flag FBAT indicating that the secondary battery 29 is being charged is set (FBAT = 1) (step S).
4) Clear the main power off flag FOFF that indicates the off state of the main power 27 (FOFF = 0) (step S
5). Next, the CPU 2 is initialized (step S6), and the main power supply 27 starts charging the secondary battery 29 (step S7). In this communication standby state, the main power source 27 continues to charge the secondary battery 29 (the state in which the main power source 27 is turned on and operated only to charge the secondary battery 29 in this way is called a “standby charging state”). ),
In step S8, it is detected whether or not the secondary battery 29 is fully charged, and the process proceeds to step S9.

Specifically, as shown in FIG. 8, step S
In step 21, it is determined whether or not the full charge of the secondary battery 29 is detected. If not fully charged, the process returns to the main routine and proceeds to step S9, while if fully charged, the charging flag FBAT.
Is cleared to "0" and the process returns to the main routine and step S
Proceed to 9. Here, the output port O of the full charge detection circuit 37
When a high level signal is output from the UT or when a timer built in the microcomputer 28 has a predetermined time (for example,
When the output signal becomes high level after 1 hour), it is determined that the secondary battery 29 is fully charged, and the output port OUT of the full charge detection circuit 37 maintains the low level signal even after a predetermined time has elapsed. If so, it is determined that the battery is not fully charged.

Next, in step S9, it is determined whether the main power supply 27 should be maintained in the on state or in the off state, and the process proceeds to step S10.

Specifically, as shown in FIG. 9, step S
In 31, the microcomputer 28 uses the serial interface sI
It is determined whether or not a main power-off command is received from the main system (CPU2) via / O. Then, when the main power-off command is received, it is determined whether or not the charging flag FBAT is cleared (step S32).
When the charging flag FBAT has already been cleared, the main power off flag FOFF is set to "1" (step S33) and the process returns to the main routine (FIG. 6) and proceeds to step S10. On the other hand, the determination result of at least one of step S31 and step S32 is negative (N
In the case of o), the process directly returns to the main routine (FIG. 6) and proceeds to step S10.

Next, in step S10, it is determined whether or not the main power-off flag FOFF is set to "1". If the determination result is negative (No), step S9
9, the routine of FIG. 9 is repeated until the main power-off flag FOFF becomes “1”, and when the result of the determination is affirmative (Yes), the main power is turned off (step S1).
1). That is, first, the output port OUT of the microcomputer 28
The output signal from 5, that is, the PS signal is set to the high level. Specifically, the transistor 56 built in the main power supply 27 is turned off and the photocoupler 55 is turned off. Then, the input signal of the input port IN1 of the oscillation control circuit 48 becomes high level, the power supply to the secondary side is stopped, and the main power supply 27 is turned off. Next, when the main power supply 27 is turned off, the CPU 2 is reset via the reset voltage detection circuit 26 (step S12), and the power supply by the secondary battery 29 or the solar battery 30 is started (in this way, the main power supply 27 is supplied.
Is turned off and the microcomputer 28 turns on the secondary battery 29 or the solar battery 3
A state in which power is supplied from 0 is simply called a "standby state").

That is, the power supply by the secondary battery 29 and the solar cell 30 is started in step S13 of FIG. 7, and then the process proceeds to step S14, in which the solar cell 3 is supplied during the power supply.
The secondary battery 29 is charged with the surplus power of the power supplied by 0. Next, in step S15, it is determined whether or not the power supplied to the solar cell 30 has decreased and the potential thereof has become lower than the potential of the secondary battery 29, and the determination result is negative (N
If it is o), the process returns to step S14, while if the result of the determination is affirmative (Yes), it is determined whether or not the potential of the secondary battery 29 is equal to or lower than a predetermined voltage (for example, 1.2 V). When the determination result is negative (No), the process returns to step S14, while when the potential becomes equal to or lower than the predetermined voltage due to the discharge of the secondary battery 29, the output signal from the output port OUT of the discharge current detection circuit 36 is output. Low level and microcomputer 2
A low level signal is input to the input port IN9 of No. 8.
Next, the microcomputer 28 recognizes the low level signal and sets the charging flag FBAT to "1" (step S1).
7) The main power supply off flag FOFF is cleared to "0" (step S18), the main power supply 27 is turned on, and the standby charging state is entered (step S19). That is, the output signal of the output port OUT5 of the microcomputer 28, that is, P
Set the S signal to low level. As a result, the transistor 56 of the main power supply 27 is turned on, the photocoupler 55 is turned on, the input port IN1 of the oscillation control circuit 48 becomes low level, the FET 43 is turned on, the primary side oscillates, and power is supplied to the secondary side. The main power supply 27 turns on. When the main power supply 27 is turned on, the process returns to step S6 again, and the CPU 2
Is initialized and charging of the secondary battery 29 is started again. As a result, the secondary battery 29 is charged while maintaining the communication standby state.

As described above, in this facsimile apparatus, the secondary battery 29 is charged with the extra power of the power supplied by the solar cell 30, so that the power can be used without waste and the main power supply 27 operates. It is possible to maintain a standby state that has not been performed for a long time and reduce power consumption.

FIG. 10 is a flowchart for performing facsimile transmission in the communication standby state.

First, in step S41, the document detection switch 15 determines whether or not there is a document. When the determination result is negative (No), it is determined whether the hooking switch 16 has been pressed (step S42). When the determination result is negative (No), it is determined whether the telephone 14 is off-hook. The determination is made via the off-hook detecting photocoupler 21 (step S43). If the determination result is negative (No), step S4
On the other hand, when the determination result of any of steps S41 to S43 is affirmative (Yes), these ON signals are input to the microcomputer 28. Next, microcomputer 2
8 recognizes the ON signal and detects the main power OFF flag FOFF
Is cleared (step S44), and the main power supply 27 is turned on (step S45). That is, the low level P from the output port OUT5 of the microcomputer 28, that is, P
The S signal is output and the photocoupler 55 is turned on. Then, when the photocoupler 55 is turned on, the oscillation control circuit 48 oscillates the primary side via the FET 43, supplies power to the secondary side, and turns on the main power supply 27. When the main power supply 27 is turned on, the CPU 2 is initialized (step S46),
Charging of the secondary battery 29 is started (step S47). While the main power supply 27 is on, the secondary battery 29 is continuously charged, this information is transmitted to the CPU 2 via the serial interface sI / O, and then the CPU 2 mainly controls. That is, in this state, a call is made to the destination (step S48), and after the line is captured by a predetermined negotiation (step S49), facsimile transmission is performed (step S50). When the transmission is completed (step S52), the line is disconnected (step S52).
52), and returns to step S9 in FIG.

FIG. 11 is a flowchart for carrying out facsimile reception in the communication standby state.

In step S61, the hooking switch 1
It is determined whether or not 6 is pressed, and if the determination result is negative (No), it is determined via the off-hook detection photocoupler 21 of the NCU 12 whether the telephone 14 is off-hook (step S62). Then, when the determination result is negative (No), the process proceeds to step S72,
When the determination result of either step S61 or step S62 is affirmative (Yes), these ON signals are input to the microcomputer 28. Next, the microcomputer 28 recognizes the ON signal, clears the main power supply off flag FOFF (step S63), and turns on the main power supply 27 (step S64). That is, the output port OU of the microcomputer 28
A low-level PS signal, that is, a low-level PS signal is output from T5 to turn on the photocoupler 55. Next, when the photo coupler 55 is turned on, the oscillation control circuit 48 causes the FET 4
The primary side is oscillated via 3 and power is supplied to the secondary side to turn on the main power supply 27. When the main power supply 27 is turned on, the CPU
2 is initialized (step S65), and charging of the secondary battery 29 is started (step S66). Main power supply 27
While the battery is on, the secondary battery 29 continues to be charged, and this information is sent to the CPU via the serial interface sI / O.
2, and then the CPU 2 plays a central role in controlling. That is, in this state, the sender is called (step S67), and after the line is captured by a predetermined negotiation (step S68), the facsimile reception is performed (step S69). When the reception is completed (step S70), the line is disconnected (step S71), and the process returns to step S9 in FIG.

On the other hand, when the result of the determination in step S62 is negative (No), the process proceeds to step S72 and the NCU
It is determined whether or not the calling signal is detected by the calling signal detecting photocoupler 12 of FIG. When the determination result is negative (No), the process returns to step S61, while when the determination result is affirmative (Yes), that is, when the calling signal is detected, after executing steps S73 to S76, the process after step S68 is performed. The step is executed and the process returns to step S9 in FIG. That is, similarly to the above, the main power supply off flag FOFF is cleared (step S73) and the main power supply 27 is turned on (step S74). And CPU2
Is started (step S75) and charging of the secondary battery is started (step S76), the line is captured (step S68), the facsimile reception is performed by the automatic reception (step S69), and the reception is completed (step S76).
70) The line is disconnected (step S71) and the process returns to step S9 in FIG.

In the above embodiment, the CP of the main system
Although the main power supply 27 is turned off by the main power supply off command from U2, the main power supply 27 may be turned off by the microcomputer 28 receiving an operation end signal from the CPU 2 at the end of communication.

As described above, in the above embodiment, in the standby state, the main power supply 27 is turned off and the power supply is controlled by the secondary battery 29 and the solar battery 30 as necessary, so that the power consumption in the standby state is reduced. The electric power can be almost 0W. Therefore, the automatic reception function does not consume power all day long, the power loss can be significantly reduced, and the generation of radiation noise can be prevented.

Furthermore, when the main power supply 27 is operating,
The CPU 2 controls each block except the main power source 27, and the main power source 27 is controlled by the microcomputer 28 of the sub control unit 17. Then, the microcomputer 28 does not control the main power source 27 according to the command from the CPU 2 in accordance with the fidelity, but controls the main power source 27 based on the result calculated by the microcomputer 28 itself based on the command from the CPU 2. As a result, the main power supply 27 can be controlled while monitoring the state of charge of the secondary battery 29, which is the power supply when the microcomputer 28 is in the standby state. When the electric charge stored in the secondary battery 29 is small, the CPU 2 Does not turn off the main power source 27 even if there is a main power source off command from the CPU, continues to turn on the main power source 27 to charge the secondary battery 29, completes charging of the secondary battery 29, and turns off the main power source from the CPU 2. When there is a command, the microcomputer 28 turns off the main power supply 27.

Thus, according to the above embodiment, the main power source 2
While 7 is turned on, the secondary battery 29 can be charged at the same time. As a result, the number of times the main power supply 27 has to be turned on only for charging the secondary battery 29 is drastically reduced, and extra power consumption can be prevented.

Further, it is not necessary to directly control the primary side of the main power source 27 by a plurality of means, and there is no restriction on the safety standard, so that it can be easily implemented.

[0067]

As described in detail above, the present invention has the following effects. (1) The power consumption in the standby state can be made almost 0 W, and since automatic reception is performed, the power consumption is not consumed all day, and the loss of power amount can be significantly reduced. (2) Since the power consumption in the standby state can be made almost 0 W, it is possible to prevent the generation of radiation noise and prevent other electronic devices from being adversely affected. (3) Since it is not necessary to directly control the primary side of the main power source by a plurality of means, there is no restriction on the safety standard, and it can be easily implemented. (4) Since the secondary battery is charged while the main power supply is operating, the number of times the main power supply is operated only for charging the secondary battery is drastically reduced, and extra power consumption can be prevented. (5) Since the main power source is activated by a plurality of activation factors such as detection of an input signal from the switch means and a ringing signal, it is possible to provide a device that is easy for the user to handle without changing from the conventional operation. (6) Since the secondary battery voltage detection means is provided, wasteful and efficient power supply can be performed, and power consumption can be further reduced. (7) By configuring the main power source with the switching means, efficient power supply can be performed, and since it can be easily turned on and off from the outside, it can be easily implemented. (8) By giving priority to the power supply to the main power supply controller, the most efficient and ideal power supply can be realized. (9) Since the secondary battery is charged with extra power of the power supplied by the solar cell, the power can be used without waste, and the standby state in which the main power source is not operating can be maintained for a long time. (10) By configuring the document switch with a mechanical switch, power consumption is eliminated during document insertion standby and consumption of the secondary battery can be avoided as much as possible. (11) Since the main power supply control unit outputs the stop signal based on the signal from the external switch means, even if the device goes out of control, further runaway can be prevented and a device with excellent safety is realized. be able to. (12) When the secondary battery is exhausted, the main power supply can be kept on for the charging until the secondary battery is sufficiently charged, so that the secondary battery is not frequently charged, It is possible to prevent deterioration of the secondary battery. Moreover, since the main power supply is not turned on / off more than necessary, the efficiency of the system is improved and the power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an embodiment of a facsimile apparatus according to the present invention.

FIG. 2 is a circuit configuration diagram showing details of an NCU.

FIG. 3 is a circuit configuration diagram showing details of a CPU and a reset voltage detection circuit of the CPU.

FIG. 4 is a block circuit configuration diagram showing details of a main power supply control unit.

FIG. 5 is a block circuit configuration diagram showing details of a main power supply.

FIG. 6 is a flowchart (1/2) showing an operation in a communication standby state.

FIG. 7 is a flowchart (2/2) showing an operation in a communication standby state.

FIG. 8 is a flowchart showing a secondary battery full charge detection routine.

FIG. 9 is a flowchart of a main power on / off determination routine.

FIG. 10 is a flowchart showing an operation during facsimile transmission.

FIG. 11 is a flowchart (1/2) showing an operation at the time of facsimile reception.

[Explanation of symbols]

2 CPU (Central Control Unit) 14 Telephone (Handset) 15 Document Detection Switch (Switch Means) 16 Hooking Switch (Switch Means) 17 Sub Control Unit (Power Supply Means, Charging Means) 20 Call Signal Detection Photocoupler (Call Signal) Detection means) 27 Main power supply (switching means) 28 Microcomputer (main power supply control unit, operation control means) 29 Secondary battery 30 Solar cell 36 Discharge voltage detection circuit (voltage detection means) 37 Full charge voltage detection circuit (voltage detection means)

Claims (23)

[Claims] 1. A central control unit for controlling each part of the apparatus main body, a main power supply for supplying a predetermined electric power to the central control unit, a main power supply control unit for controlling the operation of the main power supply, and the main power supply control. A secondary battery capable of supplying power, and a power supply means for stopping the operation of the main power supply so that the secondary battery supplies power to the main power supply control unit in a standby state; The main power supply control unit operates the central control unit by the power from the main power supply when the power supply is operating, and the main power supply has a charging unit that charges the secondary battery, and A facsimile apparatus comprising: an operation control means for controlling the operation of the main power source based on a calculation result of the main power source control unit. 2. A central control unit for controlling each part of the apparatus main body, a main power supply for supplying a predetermined electric power to the central control unit, a main power supply control unit for controlling the operation of the main power supply, and the main power supply control. A secondary battery capable of supplying power to the unit, and a solar battery capable of supplying power to the main power supply control unit, and in the standby state, the operation of the main power supply is stopped to operate the secondary battery or the solar battery. At least one of the power supply means for supplying power to the main power supply control unit, and when the main power supply is operating, the main power supply control unit uses power from at least one of the main power supply and the solar cell. At least one of the main power supply or the solar battery has a charging unit that charges the secondary battery while operating the central control unit, and the operation of the main power supply is based on a calculation result of the main power supply control unit. Control Facsimile apparatus characterized by comprising a work control unit. 3. The facsimile apparatus according to claim 2, wherein power is preferentially supplied to the main power supply controller in the order of the main power supply, the solar battery, and the secondary battery. 4. The facsimile apparatus according to claim 2, wherein the secondary battery is charged with electric power obtained by subtracting electric power supplied to the main power supply control unit from electric power of the solar battery. 5. When the main power supply receives an activation signal from the main power supply control unit in the standby state, the main power supply is activated to supply power to the main power supply control unit and the secondary power supply unit. The facsimile apparatus according to any one of claims 1 to 4, wherein the facsimile apparatus enters a standby charging state for charging a battery. 6. The voltage detecting means for detecting the voltage of the secondary battery, wherein the voltage detecting means detects that the voltage of the secondary battery becomes equal to or lower than a first predetermined voltage in the standby state. 6. The facsimile apparatus according to claim 5, wherein the standby charging state is entered when detected by the facsimile device. 7. When the voltage of the secondary battery becomes equal to or higher than a second predetermined voltage due to charging from the main power source, the main power source control unit is controlled by the main power source control unit based on the calculation result of the main power source control unit. 7. The facsimile apparatus according to claim 6, wherein the facsimile machine is stopped to enter the standby state. 8. The facsimile apparatus according to claim 5, further comprising timer means, wherein when the power is supplied from a battery other than the secondary battery for a certain period of time in the standby state, the standby charging state is entered. . 9. When the main power supply continues to be supplied with power for a certain period of time in the standby charging state, the main power supply control unit stops the main power supply based on a calculation result of the main power supply control unit. 9. The facsimile apparatus according to claim 8, wherein the facsimile apparatus enters the standby state. 10. A voltage detecting means for detecting the voltage of the secondary battery, and a timer means, wherein the voltage of the secondary battery is equal to or lower than a first predetermined voltage in the standby state. Is detected by the voltage detection means, or in at least one of the case where no power is supplied from a battery other than the secondary battery for a certain period of time in the standby state, the standby charging state is entered. 6. The facsimile apparatus according to claim 5. 11. The power supply is continuously supplied from the main power source for a certain period of time when the voltage of the secondary battery is equal to or higher than a second predetermined voltage in the standby charge state or in the standby charge state. 11. The facsimile apparatus according to claim 10, wherein the standby state is entered in at least one of the cases. 12. A timer means is provided, and when the part other than the main power supply does not operate for a certain period of time when the main power supply is operating, the standby state is entered. The facsimile apparatus according to any one of claims 1 to 11. 13. The facsimile apparatus according to claim 12, wherein the secondary battery is charged when the main power supply is operating. 14. The main power supply control unit controls the main power supply when the main power supply control unit receives a main power supply off command from the central control unit in the operating state. The facsimile apparatus according to any one of claims 1 to 13. 15. The main power-off instruction is an operation end signal for notifying the end of the operation.
The described facsimile machine. 16. The main power supply is composed of switching means, and the main power supply control section controls on / off of the switching means based on a command from the outside. The facsimile apparatus according to any one of the above. 17. At least one switch means is provided, and when the switch means is input in the standby state, the main power supply is activated and the central control unit operates. The facsimile apparatus according to any one of claims 1 to 16. 18. A call signal detecting means for detecting a call signal is provided, and when the call signal is received in the standby state, the main power supply is activated to operate the central control unit. The facsimile apparatus according to any one of claims 1 to 16. 19. At least one switch means and call signal detection means for detecting a call signal, wherein when the switch means is input in the standby state or when the call signal is received. In at least one of the cases, the main power supply is activated and the central control unit operates.
7. The facsimile machine according to any one of 6 above. 20. At least one of an original detection switch for detecting whether or not there is a transmission original, a communication start switch for starting a communication operation, and an off-hook detection switch for detecting an off-hook of a handset. 20. The facsimile apparatus according to claim 17, further comprising: 21. The facsimile apparatus according to claim 20, wherein the original detection switch is a mechanical switch. 22. The operation of the main power supply is stopped when the main power supply receives a stop signal from the main power supply control section while the main power supply is in an operating state. Item 23. The facsimile apparatus according to any one of Items 21. 23. The facsimile apparatus according to claim 22, wherein the main power supply control section outputs the stop signal in accordance with a signal from an external switch means.