JPH07283883A - Communication device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] It is possible to automatically shift to the operating state by not calling the power in the non-operating state and setting a calling signal from the communication line or setting a transmission document. And Structure: When a calling signal RS (RING signal) is input from the telephone lines L1 and L2 when the power is off, the calling signal R
When S is input to the light emitting diode 203a and the phototransistor 203b becomes conductive due to light emission, the semiconductor relay 203, the contacts r1b and r2b, and the coil R1 of the relay R1.
A closed loop is formed by C and the commercial power source, the relay operates to close the contacts r1a1 and r1a2, and the contact r1b is opened after a predetermined time elapses. Therefore, the circuit including this contact enters the open loop state, r1a1, contact r2b
And the closed loop by the coil R1C of the relay holds that state. Therefore, even if RS ends, the AC power supply unit 202 continues to be supplied with power via the contact r1a2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device such as a facsimile device.

[0002]

2. Description of the Related Art A conventional power supply unit of a communication device will be described with reference to FIG. FIG. 8 is a diagram showing an example of a main part of a power supply unit used in a conventional communication device. In general, the power supply unit includes a first DC power supply 801, a second DC power supply 802, a noise filter 803 and a transformer 804. The first DC power supply 801 is in the operating state of the communication device so that it can respond to a key input of the operation unit, a calling signal from the sensor circuit or a telephone line even when the communication device is in the non-operating state (standby state). Regardless of whether or not it is, power is always supplied to the monitoring circuit (not shown). The second power source 802 supplies electric power to parts other than the monitoring circuit when the device is in an operating state.

In the above structure, the first DC power supply 801 always operates to supply power to the monitoring circuit when in a standby state for a transmission or reception operation. At this time, the second D
Since the C power supply 802 is in a non-operating state, no power is supplied to the parts other than the monitoring circuit. In this state, when the key input of the operation unit or the input of the call signal from the sensor circuit or the telephone line is detected, the monitoring circuit detects the second DC power source 802.
And outputs a remote signal to the second DC power source 80
2 is operated. With this configuration, when the device is in the non-operating state (standby state), the power supply is limited to only a necessary portion, thereby suppressing the power consumption.

[0004]

However, the communication device having the above configuration needs to be configured such that the first DC power supply 801 always operates even when the communication device is in a non-operating state. There was a problem that the electric power of was consumed wastefully.

The present invention has been made to solve the above-mentioned problems, and consumes no power at all in a non-operating state, and automatically when a calling signal from a communication line or a transmission original is set. An object of the present invention is to provide a communication device that can shift to an operating state.

[0006]

In order to achieve the above object, a communication apparatus according to claim 1 is a communication apparatus connected to a communication line, and a power supply section for supplying electric power to the entire apparatus, First operated by calling signal from communication line
Switching means and second switching means to which electric power is supplied from a commercial power source when the first switching means operates,
It is characterized in that a self-holding circuit is formed by the operation of the second switching means and electric power is supplied from the commercial power source to the power source section.

Further, the communication device includes an operating state detecting means for detecting an operating state of the device, and a third switching means operating in response to an output of the operating state detecting means, and the third switching device is provided. The operation of the means may open the self-holding circuit to cut off the power supply from the commercial power supply to the power supply unit.

In order to achieve the above object, a communication device according to a second aspect of the invention has a document sensor for recognizing that a document is set, and a power supply section for supplying electric power to the entire device.
And a switching unit that operates when the document sensor detects that the document is set, and a self-holding circuit is formed by the operation of the switching unit to supply power from a commercial power supply to the power supply unit. It is a thing.

Further, it is preferable that the communication device includes a power switch composed of a seesaw switch, and the self-holding circuit is not formed when the power switch is on.

[0010]

According to the communication device of the present invention, the first switching means operates in response to the call signal from the communication line, and the first switching means operates to switch the commercial power source to the second switching means. Power is supplied to the power source, a self-holding circuit is formed by the operation of the second switching means, and power is supplied from the commercial power source to the power source section.

According to another aspect of the communication device of the present invention, the switching means operates when the document sensor detects that the document is set, and the self-holding circuit is formed by the operation of the switching means. Electric power is supplied from the commercial power supply to the power supply unit.

According to the third aspect of the communication device, the third switching means operates in response to the output of the operating state detecting means,
As a result, the self-holding circuit is opened, and the power supply from the commercial power supply to the power supply unit is cut off.

Further, according to the communication device of the fourth aspect, the self-holding circuit is not formed when the power switch is on.

[0014]

First, the first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

FIG. 1 is a block diagram showing the configuration of the entire communication apparatus according to this embodiment. In the figure, the communication device 1
00 is a control unit 101, a ROM 102, and an operation unit 10
3, the peripheral control unit 104, the RAM 105, the reading and reading driving unit 106, the recording and recording driving unit 107, the network NCU 108, and the power supply unit 109,
Mainly composed.

The control unit 101 controls the entire apparatus, and programs and the like for the control unit 101 to control are stored in the ROM 102. Operation unit 103
Is used by an operator to input an operation command or the like to the apparatus, and is composed of, for example, a keyboard. The peripheral control unit 104 has an input / output terminal (not shown) with a peripheral device used in this apparatus. The RAM 105 is a working area of the control unit 101. The reading and reading drive unit 10 reads the information of the original to be transmitted or copied.
The recording and recording driving unit 107 records the received information or the information read by the reading and reading driving unit 106. Network NC
U108 is an interface between the present apparatus and a telephone line, and a power supply unit 109 is connected to a commercial power source and supplies electric power necessary for the operation of the apparatus.

FIG. 2 is an electric circuit diagram showing the configuration of the main part of the power supply unit 109 described above. In FIG. 1A, the power supply unit 109 has a pair of power cords 201 connected to an external commercial power source, one of which is a cord 20.
1a is directly connected to the terminal 202a of the AC power supply unit 202, and the other cord 201b is the contact r1 of the relay R1.
It is connected to the terminal 202b of the AC power supply unit 202 via a2. Further, the semiconductor relay 203 and the contact r1 of the relay R1 are provided between the power cords 201a and 201b.
b, the contact r2b of the relay R2, and the coil R1C of the relay R1 are connected. Further, the contact r of the relay R1
1a1, the document sensor DS, and the power switch PSW are connected in parallel with the series circuit of the semiconductor relay 203 and the contact r1b. The document sensor DS is made up of, for example, a micro switch and is provided in the reading and reading drive unit 106 in FIG. Then, the document sensor DS transmits
It is configured to turn on when a copy document is inserted.

Here, in the relay R1, when no current is supplied to the coil R1C, the contact r1a1 and the contact r1a2.
Is open and the contact r1b is closed. Also, the coil R
When current is supplied to 1C, contact r1a1 and contact r1a
2 is closed, and the contact r1b is opened after a lapse of a predetermined time from the start of power supply.

The semiconductor relay 203 includes the light emitting diode 2
03a and a phototransistor 203b that conducts by the light emitted from the light emitting diode, and the terminal on the side of the light emitting diode 203a has a rectifier element 204 and a capacitor 205 for suppressing a ripple voltage, and a telephone line L1. It is connected to L2.

The coil R2C of the relay R2 is shown in FIG.
As shown in FIG.
C power supply output terminal VR, and the other end is a transistor T
It is connected to the collector of r.

The emitter of the transistor Tr is grounded,
An OFF signal, which becomes a high level when the power is turned off, is supplied to the base from the control unit 101. A diode D is connected in parallel with the coil R2C.

The relay R2 is actually the peripheral control unit 1
It is provided in 04.

Here, the relay R2 is a normally closed type relay, and when no current is supplied to the coil R2C, the contact r2
b is closed, and the contact r2b is opened when current is supplied to the coil R2C.

In the communication device configured as described above, first, the operation when the power is turned off (non-operating state) to power on (operating state) will be described.

In this apparatus, when the power is off, (1) when a calling signal is input from the telephone lines L1 and L2, (2) when a document to be transmitted or copied is inserted and the document sensor DS is turned on, (3) When the operator presses the power switch PWS, the power of the device is turned on and the operation state is entered.

In the case of the above (1), that is, when the ringing signal RS (RING signal) is input from the telephone lines L1 and L2 when the power is off, the ringing signal RS is rectified by the rectifying element 204 and then the capacitor 205. The ripple voltage is suppressed by and is input to the light emitting diode 202a, and the light emitting diode 202a is caused to emit light. Light emitting diode 20
Light energy generated by the light emission of 2a is converted into electric energy in the phototransistor 202b, and the phototransistor 202b is made conductive.

When the phototransistor 202b becomes conductive, the semiconductor relay 202, the contacts r1b and r2b, the coil R1C of the relay R1 and the commercial power supply form a closed loop. When the closed loop is formed, the relay R1 operates to close the contacts r1a1 and r1a2.

The contact r1b of the relay R1 is connected to the contact r1a.
1 and r1a2 are opened after a predetermined time has passed from the time when they are closed, the circuit including the contact r1b is in an open loop state, but the closed loop formed by the contact r1a1, the contact r2b and the coil R1C of the relay R1 maintains the state. . Therefore, even if the call signal RS is not input, the AC power supply unit 202 continues to be supplied with power via the contact point r1a2.

In the case of the above (2), that is, the original sensor D
When S is turned on, the document sensor DS and the contact r2
b, the coil R1C of the relay R1, and the commercial power supply form a closed loop. When a closed loop is formed, contact r1
A closed loop is formed by a1, r2b and the coil R1C of the relay R1. Therefore, even when the document is taken out and the document sensor DS is in the open state, the closed loop state is maintained, so that the AC power supply unit 202 has the contact r2a.
The power supply is continued via 2.

In the case of the above (3), that is, when the operator depresses the power switch PWS, the power switch PS
W, the contact point r2b, the coil R1C of the relay R1 and the commercial power supply form a closed loop, and the operation of the relay R1 closes the contact point r1a1 and the contact point r1a2.
1, a closed loop is formed by the contact point r2b and the coil R1C of the relay R1. Thereby, even if the operator returns the power switch PWS, the power supply to the AC power supply unit 202 is continued via the contact point r1a2.

In this embodiment, the AC power supply unit 2
The operator is informed that power is being supplied to 02 by visual or audible means (not shown) such as lighting an indicator, generating a beep, or displaying a message on the liquid crystal panel. This allows
The operator can know the timing of returning the power switch PWS.

Next, the operation when transitioning from power-on (operating state) to power-off (non-operating state) will be described with reference to FIG. FIG. 3 is a flowchart showing an operation procedure when the power supply of the device is changed from on to off.

When the processing operation such as transmission, reception or copying is completed (step S301), the AC power supply unit 202
The end processing work to turn off the power supply to each I / O
This is executed for the O port (step S302). At this time, the control unit 101 shown in FIG. 1 outputs an off signal for turning off the relay R2 to the transistor Tr shown in FIG. 2B (step S303). When an off signal is input to the transistor Tr, the transistor Tr is turned on, current is supplied to the coil R2C, and the contact r
2b is opened. Therefore, the circuit composed of the contacts r1a1 and r2b and the coil R1C of the relay R1 is in the open loop state, so that the contact r1a2 of the relay R1 is also in the open state and the power supply to the AC power supply unit 202 is cut off (step S304).

As described above, the communication device of the present invention transmits,
When the processing operation such as receiving or copying is completed, A
The power supply to the C power supply unit 202 is cut off, and a transition is made to a non-operating state in which no power is consumed.

FIG. 4 is a diagram for explaining the operation timing of each component from the power-on of the device (in the case of (1) above) to the power-off.

At time t1, when the call signal RS is input from the telephone lines L1 and L2, the light emitting diode 202a emits light as described above and the phototransistor 202b.
Is conducted, and the semiconductor relay 203 operates ((a) and (b) in the same figure). When the semiconductor relay 203 operates,
Semiconductor relay 202, contacts r1b, r2b, relay R1
The coil R1C and the commercial power supply form a closed loop, and the relay R1 operates. At time t2, which is delayed from the time t1 by the operation time of the relay R1, the contacts r1a1 and r1a2 are closed, and AC power supply is started ((c) and (f) in the figure). The contact r1b of the relay R1 is the contact r
Since the contacts 1a1 and r1a2 are opened at a time t3 after a predetermined time has passed from the time t2 when the contacts r1a2 are closed (FIG. 7D), the contact r1
Although the circuit including b is in the open loop state, the contacts r1a1,
The closed loop formed by the contact r2b and the coil R1C of the relay R1 holds the state. Therefore, even if the calling signal RS ends, the AC power supply unit 202 is continuously supplied with power via the contact point r1a2.

When a predetermined operation is completed and an off signal for turning off the relay R2 is output to the transistor Tr at time t4, the transistor Tr is turned on and the coil R is turned on.
A current is supplied to 2C and the contact r2b is opened ((e) in the figure). At this time, the circuit composed of the contacts r1a1 and r2b and the coil R1C of the relay R1 is in an open loop state, so that the contact r1b is closed ((d) in the figure). After that, at a time t5 delayed from the time t4 by the operation time of the relay R1, the contacts r1a1 and r1a2 of the relay R1.
Is also opened, and the power supply to the AC power supply unit 202 is cut off ((c) and (f) in the figure). Furthermore, contact point r1
Since the circuit consisting of a1, r2b and the coil R1C of the relay R1 is in an open loop state, no current flows through the contact r2b of the relay R2, so that the contact r2b is closed at time t6 ((e) in the figure). ).

As described above, according to this embodiment,
In the non-operating state of the communication device, no power is supplied to the AC power supply unit 202 in the non-operating state, and only when the power is required for the operation, for example, when performing the transmitting operation, the receiving operation, the copying operation, and the like. Since the power is supplied, it is not necessary to keep some circuits in the power supply unit of the device alive when in the standby state, unlike the conventional communication device. Therefore, no power is consumed in the non-operating state, and it is possible to automatically shift to the operating state by the calling signal from the communication line or the setting of the transmission original. In addition, since it consumes no power at all in the non-operating state, a power storage device such as a battery or a large-capacity capacitor for starting the device, a charging circuit for charging them, a power generation element such as a solar battery, or a voltage stabilization device. It is not necessary to provide a regulator or the like for this, and the configuration of the communication device can be made relatively simple.

Further, for example, when the transmitting operation, the receiving operation, the copying operation, etc. are completed, the apparatus automatically shifts to a non-operating state in which power is not consumed at all, so that further power saving can be achieved.

The capacitor 205 shown in FIG. 2A is
If the response speed of the relay R1 is sufficiently faster than the half cycle of the ringing signal, it is not necessary to provide it.

Next, the second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to.

In this embodiment, a transfer type relay is used as the relay R1 shown in FIG. 2 of the first embodiment described above. Therefore, it is no longer necessary to provide the contact point r1b provided between the semiconductor relay 203 and the contact point r2b,
The circuit configuration can be simplified as compared with FIG. The other circuit configurations and operations are the same as those in FIG. 2, and thus detailed description thereof will be omitted.

In order to prevent a short circuit of the semiconductor relay 203 when the semiconductor relay 203, the contact r2b and the relay R1 are in a closed loop state, the semiconductor relay 203
It is desirable to insert a protection resistor between the contact and the contact r2b to the extent that a load current for operating the relay R1 can be supplied.

Next, the third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to.

As is clear from the figure, in this embodiment,
The circuit in which the rectifying element 204 shown in FIG. 2 of the first embodiment described above is deleted is adopted, and the ringing signal R
Instead of rectifying S, an AC input type is used as the semiconductor relay 203 '.

With this structure, the circuit structure can be simplified as compared with FIG.
The same effect as the embodiment can be obtained.

Next, the fourth embodiment of the present invention will be described with reference to FIG.
Will be described with reference to.

In this embodiment, a seesaw type switch is adopted as the power switch PSW shown in FIG. 2 of the first embodiment. Specifically, one switch 701 of the power switch PSW is connected in parallel to the contact r1a, and the other switch 702 is connected to the semiconductor relay 203 and the power cord 2.
It is provided between 01b. The other configuration is similar to that of FIG. 2, and thus detailed description thereof is omitted.

In the above structure, when the power switch PSW is turned on, the switch 701 is closed and the switch 702 is opened, and power is supplied to the AC power supply unit 202. If the call signal RS is input from the telephone line in this state, the switch 702 is in the open state, and the device cannot be activated by the call signal RS.

On the other hand, when the call signal RS is input from the telephone line when the power switch PSW is off, the switch 702 is in the closed state, and therefore the same operation as in the first embodiment described above is performed.

As described above, by adopting the seesaw switch as the power switch, it is possible to prohibit the start-up by the calling signal when the power switch is turned on. This makes it possible to prevent the power supply from becoming unstable due to the formation of another closed loop while power is being supplied to the AC power supply unit.

The relay R1 can be replaced with a large current control transistor or a thyristor. Also, relay R
2 may be configured as a normal switch so that an operator turns off the power to the apparatus.

Further, although the mechanical relays are adopted as the relays R1 and R2 in the above-mentioned first to fourth embodiments, they may be constituted by semiconductor relays.

[0054]

As described above, according to the communication device of the first aspect, the first switching means operates in response to the calling signal from the communication line, and the first switching means operates. Power is supplied from the commercial power source to the second switching means, and the self-holding circuit is formed by the operation of the second switching means.
Electric power is supplied from the commercial power supply to the power supply unit. Therefore, unlike the conventional case, it is not necessary to keep a part of the circuit in the power supply unit of the device alive when in the standby state, so that it consumes no power when in a non-operating state, and the communication line is not consumed. It is possible to obtain the effect of being able to automatically shift to the operating state by the call signal of.

Further, according to the communication device of the second aspect, when the transmission document or the like is set, the switching means operates to form the self-holding circuit, and the power is supplied from the commercial power source to the power source section. It is possible to obtain an effect that no electric power is consumed in the operating state and that the operating state can be automatically set by setting a transmission document or the like.

According to the communication device of the third aspect, the third switching means operates according to the output of the operating state detecting means,
As a result, the self-holding circuit is opened and the power supply to the power supply unit is cut off. Therefore, there is an effect that it is possible to automatically shift to a non-operating state in which no power is consumed, depending on the operating state of the device.

Further, according to the communication device of the fourth aspect, since the self-holding circuit is not formed when the power switch is on, the start-up by the call signal from the communication line is prohibited when the power switch is on. You can As a result, another closed loop is formed while power is being supplied from the commercial power supply to the AC power supply unit, and it is possible to prevent the power supply from the power supply unit from becoming unstable.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a communication device according to a first example of the present invention.

FIG. 2 is an electric circuit diagram showing a configuration of a main part of the power supply unit shown in FIG.

FIG. 3 is a flowchart showing a procedure for turning off the power supply of the communication device according to the embodiment.

FIG. 4 is a ringing signal, an off signal, a semiconductor relay, and a contact r1.
It is a timing chart which shows on / off timing of a1, r1a2, r1b, and r2b.

FIG. 5 is an electric circuit diagram showing a configuration of a main part of a power supply unit of a communication device according to a second embodiment of the present invention.

FIG. 6 is an electric circuit diagram showing a configuration of a main part of a power supply section of a communication device according to a third example of the present invention.

FIG. 7 is an electric circuit diagram showing a configuration of a main part of a power supply section of a communication device according to a fourth example of the present invention.

FIG. 8 is an electric circuit diagram showing a configuration of a power supply unit of a conventional communication device.

[Explanation of symbols]

 100 communication device 101 control unit (operating state detection unit) 201 power cord 202 AC power supply unit (power supply unit) 203 semiconductor relay (first switching unit) DS document sensor R1 relay (second switching unit) R2 relay (third) Switching means) PSW power switch

Claims (4)

[Claims] 1. A communication device connected to a communication line, comprising: a power supply section for supplying electric power to the entire device; a first switching means which operates by a calling signal from the communication line; Second switching means to which electric power is supplied from the commercial power source when the switching means operates, and a self-holding circuit is formed by the operation of the second switching means to supply electric power from the commercial power source to the power supply section. A communication device characterized by supplying. 2. A document sensor for recognizing that a document has been set, a power supply section for supplying electric power to the entire apparatus, and a switch that operates when the document sensor detects that the document has been set. And a means for forming a self-holding circuit by the operation of the switching means to supply electric power from a commercial power supply to the power supply unit. 3. An operating state detecting means for detecting an operating state of the apparatus, and a third switching means operating in response to an output of the operating state detecting means, wherein the third switching means operates to operate the third switching means. 2. The communication device according to claim 1, wherein the self-holding circuit is opened to cut off the power supply from the commercial power supply to the power supply unit. 4. The communication device according to claim 1, further comprising a power switch made up of a seesaw switch, wherein the self-holding circuit is not formed when the power switch is on.