JP4428177B2 - Power supply system - Google Patents

Description

  The present invention provides a power supply system including a controller that controls a predetermined device, and a power supply device that supplies power received from a power inlet (for example, an outlet of an AC power source) to the device and the controller. The present invention relates to a power supply device that supplies electric power received from an intake port to a predetermined device and a controller that controls the device.

  2. Description of the Related Art A copying machine that reads a document image to obtain an image signal and records a copy image obtained by copying the document image on a sheet based on the image signal is widely used. Some of the copiers are also connected to a network and record and output an image based on an image signal transmitted via the network (hereinafter, this function is referred to as a “printer function”). Copiers have also appeared.

  Conventionally, in order to realize such a printer function, based on a copier that does not have such a printer function, a controller that performs communication via a network is connected to the copier, and further, power saving is achieved. Therefore, the power supply of the copier itself is always turned off, and the power supply equipment that is always energized for 24 hours to turn on the power of the copier when the controller receives an image signal to be recorded with the copier Is connected to control the power on / off of the copying machine.

  In the case of the conventional configuration described above, the controller needs to be always operated for the network monitoring function, but since the power of the copying machine itself is always off, considerable power saving is realized. However, in the case of the conventional configuration, there is a problem that a power supply facility that is energized for 24 hours is further required, which consumes power constantly and wastes power as a whole.

  The above problem is not limited to a copier with a printer function, but is a problem common to a power supply system including a controller that controls devices and a power supply device that supplies power to the devices and the controller.

  In view of the above circumstances, an object of the present invention is to provide a power supply system and a power supply device in which further power saving is achieved.

The power supply system of the present invention that achieves the above object is a power supply system including a controller that controls a predetermined device, and a power supply device that supplies power received from a power inlet to the device and the controller.
The power supply is
A first power supply circuit that generates power for the controller and supplies the power to the controller;
A main power source that is turned on and off for power on and off, generates a first power supply path that connects the power inlet and the first power supply circuit by the on operation, and shuts off the first power supply path by the off operation. A switch,
A second power supply path that connects the power intake and the first power supply circuit by bypassing the main switch is generated by the on control by the on / off control by the controller, and the second power is generated by the off control. A first switch circuit for cutting off the supply path;
And a second power supply circuit which receives on / off control by the controller, generates electric power for the device by the on control, and supplies the power to the device.

  The power supply system of the present invention supplies power only to the controller directly by operating the main switch, and supplies power to the device under the control of the controller, so that it is not necessary to keep the device running. The power supply to the device is performed only when necessary, since the power supply to the device is cut off by the controller. Therefore, the power supply that is always energized for 24 hours, which is necessary in addition to the conventional controller, is unnecessary, and power saving is promoted.

  Here, in the power supply system of the present invention, in the initial state immediately after receiving the power supplied from the first power supply circuit, the controller is in a hardware state in which the first switch circuit is on-controlled. It is preferable that it exists in.

  By configuring in this way, even when the main switch is turned on and the controller is performing the start-up operation of each part, the start-up operation is prevented from being interrupted even if it is immediately turned off. Occurrence of malfunctions due to interruption of startup operation is prevented.

  In the power supply system of the present invention, the first switch circuit operates using a signal having the same voltage as the power supplied from the first power supply circuit to the controller as an ON control signal. Is preferred.

  Further, in the power supply system of the present invention, the power supply system is provided between the power inlet and the second power supply circuit, is subjected to on / off control from the controller, and between the power inlet and the second power supply circuit by the on control. It is preferable to provide a second switch circuit that generates a third power supply path to be connected and shuts off the third power supply path by OFF control.

  With this third power supply circuit, when the power supply to the equipment is stopped, the primary side loss of the second power supply circuit, which is the power supply on the equipment side, can be prevented, and further power saving is realized. To do.

  With this configuration, when the extended function by the controller, for example, the printer function described in the above example is unnecessary, the output of the first power supply circuit may be directly connected as the control signal of the second switch circuit without the controller. By doing so, the power supply system that matches the usage without the extended function by the controller is realized by directly turning on / off the power by turning on / off the main switch.

  Here, as an example, the power supply system of the present invention is a copying machine in which the above-mentioned device reads a document image to obtain an image signal, and records a copy image obtained by copying the document image on the sheet based on the image signal. Thus, it works suitably when the controller is a controller that monitors the network and transfers the image signal transmitted via the network to the copying machine.

  In other words, if you want to supply power only to the controller, turning off the first and second switch circuits by turning off the controller can prevent the holding power of the switch and the primary loss of the power supply circuit mounted on the equipment side. It becomes possible to eliminate power consumption other than.

Moreover, the power supply device of the present invention that achieves the above object is a power supply device that supplies power received from a power intake port to a predetermined device and a controller that controls the device.
A first power supply circuit that generates power for the controller and supplies the power to the controller;
A main power source that is turned on and off for power on and off, generates a first power supply path that connects the power inlet and the first power supply circuit by the on operation, and shuts off the first power supply path by the off operation. A switch,
A second power supply path that connects the power intake and the first power supply circuit by bypassing the main switch is generated by the on control by the on / off control by the controller, and the second power is generated by the off control. A first switch circuit for cutting off the supply path;
And a second power supply circuit which receives on / off control by the controller, generates electric power for the device by the on control, and supplies the power to the device.

  Here, in the power supply device of the present invention, the first switch circuit may operate using a signal having the same voltage as the power voltage supplied to the controller by the first power supply circuit as an ON control signal. preferable.

  Further, in the power supply device of the present invention, the power supply device is provided between the power intake and the second power supply circuit, is subjected to on / off control from the controller, and is connected between the power intake and the second power supply circuit by the on control. It is preferable to provide a second switch circuit that generates a third power supply path to be connected and shuts off the third power supply path by OFF control.

  Further, in the power supply device of the present invention, when the controller does not perform an off control even after a predetermined time has elapsed after receiving an off signal from the main switch due to runaway or the like, the first switch circuit and the second power supply It is preferable that the circuit cuts off the second power supply path with a time difference by hardware and stops the output of the second power supply circuit. Here, for safety reasons, it is preferable to stop the output of the third power supply path on the device side first.

  As described above, according to the present invention, power saving is promoted.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a circuit block diagram showing an embodiment of a power supply system of the present invention.

  FIG. 1 shows a copying machine main body 10 constituting a copying machine with a printer function, a fixing device 11 mounted on the copying machine, a controller 20 connected to a network (not shown), and other components shown in FIG. A power supply 30 comprising a set of elements is shown. The fixing device 11 is a component of the copying machine. Here, for convenience of explanation, the fixing device 11 and the copying machine main body 10 are shown as separate blocks.

  The controller 20 constantly monitors the network, and when an image signal for recording an image by the copying machine is transmitted to the network, power is supplied to the copying machine and the image signal is transferred to the copying machine. The controller 20 incorporates a hard disk device (not shown) (hereinafter abbreviated as HDD) for taking in image data and storing a program.

  The power supply device 30 is provided with a plug 301 for taking in AC power. When the plug 301 is inserted into an AC power outlet (not shown), the AC power taken in from the plug 301 is The main switch 304 is reached via the earth leakage breaker 302 and the noise filter 303. The main switch 304 is a main switch for turning on and off the power. The power is turned on by an on operation and the power is turned off by an off operation. FIG. 1 shows the main switch 304 in an off-operation state. The on / off state of the main switch 304 is transmitted to the controller 20 via the signal line 331.

  Here, when the main switch 304 is turned on, the power taken in from the plug 301 reaches the power supply circuit 305. The power supply circuit 305 corresponds to the first power supply circuit according to the present invention, and the power supply path for supplying AC power to the power supply circuit 305 via the main switch 304 is the first power supply path according to the present invention. It corresponds to. In the power supply circuit 305, DC power supplied to each part of the controller 20 except for the HDD is generated and supplied to the controller 20. The DC power generated by the power supply circuit 305 and supplied to the controller 20 includes, in addition to power used by the controller 20 itself, relays 306 and 307 and power supply circuit 308, which will be described later, via control lines 341 and 342. Electric power for controlling the relay 308a to be turned on is also generated and supplied to the controller 20. When the controller 20 receives power supply from the power supply circuit 305, the controller 20 starts operation except for the built-in HDD, and outputs a main power-on signal (Main P ON signal) via the control line 341 and the control line 342. The ready power-on signal (Ready P ON signal) is output via.

  When Main P ON signal is output to the control line 341, the Main P ON signal controls the two relays 306 and 307 to be in an ON state. When the relay 306 is turned on, the AC power taken from the plug 301 and supplied via the leakage breaker 302 and the noise filter 303 bypasses the main switch 304 and is supplied to the power supply circuit 305. Here, the relay 306 corresponds to the first switch circuit according to the present invention, and the power supply path that bypasses the main switch 304 and supplies the AC power to the power supply circuit 305 is the second power supply according to the present invention. Corresponds to the road.

  When the relay 306 is turned on, DC power is continuously supplied to the controller 20 via the power supply circuit 305 until the controller 20 stops the output of the Main P ON signal even if the main switch 304 is turned off thereafter. .

  When Main P ON signal is output to the control line 341, the other relay 307 is also turned on. When the relay 307 is turned on, a power supply circuit 309 that supplies power for the HDD to the controller 20, a power supply circuit 310 that supplies power to the fixing unit 11, and a finisher (a sheet bundle on which images are recorded and stacked). Power is supplied to a power supply circuit 311 that supplies power to an optional device such as a punching hole or a device that binds a bundle of sheets with a stapler. When the relay 307 is turned on, AC power is supplied to the primary side of the power supply circuit 308 that supplies power to the copying machine main body 10.

  Further, when receiving power from the power supply circuit 305, the controller 20 outputs Main P ON signal to the control line 341 and outputs Ready P ON signal to the control line 342 as described above. The signal controls the relay 308a of the power supply circuit 308 that supplies power to the copying machine main body 10 to be in an ON state. When the relay 308 a is turned on, the power supply circuit 308 generates power to be supplied to the copying machine main body 10 and supplies it to the copying machine main body 10. The power supply circuit 308 for the copying machine main body 10 corresponds to the second power supply circuit according to the present invention.

  The relay 307 corresponds to the second switch circuit according to the present invention, and the power supply path via the relay 307 corresponds to the third power supply path according to the present invention.

  Here, when the main switch 304 is turned on, if the relay 306 is delayed until the main switch 304 is turned on, if the main switch 304 is turned off during that time, the controller 20 is unexpectedly started up. The electric power is cut off, which may cause malfunction or damage to the controller 20. Therefore, the following measures are taken here.

  FIG. 2 is a schematic circuit diagram of a part of the controller 20 that outputs Main P ON signal to the control line 341.

  In the controller 20, software is executed, and transmission and stop of the control line Main P ON signal are controlled by the software, but the internal circuit 201 of the controller 20 waits for activation of the software upon receiving power supply. First, it is configured to send Main P ON signal in hardware as an initial state. That is, when power is supplied to the internal circuit 201 and the level of a signal output therefrom rises to a sufficient level, the reset is released, and the signal output from the internal circuit 201 is output from the buffer 202 and the transistor circuit. The power is amplified in 203 and output to the control line 341 as Main P ON signal.

  Accordingly, when the main switch 304 is turned on, the relays 306 and 307 shown in FIG. 1 are immediately turned on without waiting for the rise of the software operating in the controller 20, and the main switch 304 is disabled during the rise of the controller 20. Even if the power is turned off, the power can be continuously supplied, and the relay 306 and 307 can be turned off by themselves after the controller 20 is started up and an environment for dealing with power-off can be prepared.

  In FIG. 2, the main P ON signal output to the control line 341 has been described, but the same applies to the Ready P ON signal output to the control line 342.

  In addition, when the controller 20 does not perform the off control even after a predetermined time has elapsed since the controller 20 receives an off signal from the main switch 304 due to runaway or the like, the relays 306 and 308a receive the off signal of the main switch 304 (not shown). Turn off with time difference by hardware. The time difference is because the copier main body 10 that is the relay 308a is preferably turned off urgently on the assumption of an abnormal operation or the like, and the controller 20 that is the relay 306 needs time for data storage.

  In addition to the normal operation mode in which all the relays 306, 307, 308a shown in FIG. 1 are in an on state and all the power supply circuits 305, 308, 309, 310, 311 supply power, the controller 20 has a low power Mode and sleep mode.

  The low power mode is a mode in which the sending of Ready P ON signal to the control line 342 is stopped and the relay 308a of the power supply circuit 308 for the copier body 10 is shifted to the OFF state as compared with the normal operation mode. When shifting from the normal operation mode to the low power mode, before the relay 308a of the power supply circuit 308 is controlled to be turned off, the controller 20 transfers the low power to the copying machine body 10 via the signal line 332. In response to the advance notice, the copying machine body 10 is instructed by the power supply circuit 310 for the fixing device 11 to enter the low power mode via the signal line 333. Then, the power supply circuit 310 limits the power supplied to the fixing device 11. This is because the fixing device 11 takes a long time to start up when the power is stopped, so that a certain amount of power continues to be supplied and when it becomes necessary to actually operate, the fixing device 11 starts up quickly. After notifying the copying machine main body 10 of the transition to the low power mode, the controller 20 stops the Ready P ON signal output to the control line 342 and controls the relay 308a of the power supply circuit 308 to be in the OFF state. Then, the power supply from the power supply circuit 308 to the copying machine main body 10 is stopped, and the copying machine main body 10 is turned off.

  In the sleep mode, the transmission of Main P ON signal on the control line 341 is further stopped and the relays 306 and 307 are controlled to be in the OFF state as compared with the low power mode. When the relays 306 and 307 are turned off, the AC power supply to the power supply circuit 309 is cut off, so the power supply to the HDD of the controller 20 is stopped, and the copying machine main body 10, the fixing device 11, and the optional device (installed) The power supply to

  However, even when the relay 306 is turned off, AC power is continuously supplied to the power supply circuit 305 via the main switch 304, and the controller 20 can operate except for the HDD. At this time, the controller 20 operates only in the part that monitors the network, and stops the power supply to the other parts. When the controller 20 recognizes that image data to be received by the controller 20 is transmitted via the network, the controller 20 sends Main P ON signal and Ready P ON signal to the control lines 341 and 342 to enter the normal movement mode. Transition.

  Since the HDD is also stopped when in the sleep mode and only the network monitoring work is performed, even if the main switch 304 is turned off while in the sleep mode, the network monitoring operation is also stopped thereafter. Besides, there is no inconvenience.

  Here, when the printer function is unnecessary in the copying machine main body 10, the controller 20 is unnecessary. Here, the power supply circuit 305 generates power of the same voltage level as that of Main P ON signal and Ready P ON signal, and the power line for supplying the power to the controller 20 and the control lines 341 and 342 are directly connected. A harness cheat connector (not shown) is prepared, and its power line and control lines 341 and 342 are directly connected. At this time, the connector of the relay 306 is removed. In this way, when the main switch 304 is turned on and the power supply circuit 305 is started, the two relays 307 and 308a are turned on in response to the rise of the power supply circuit 305. When the main switch 304 is turned off, the two relays 307 are turned on. , 308a are turned off. That is, the absence of the controller 20 prevents the network from being monitored and the print function to be lost, but the power is normally turned on and off.

  In addition, depending on the type of controller, there is a controller that requires the HDD to operate in order to monitor the network. In the case of such a controller, only Ready P ON signal is turned off. At this time, although the effect of power saving is partially eliminated, the operation is normally performed.

  FIGS. 3 and 4 are diagrams showing a first half part and a second half part of the flowchart showing the flow of the power on and off operations in the power supply system shown in FIG. 1, respectively. Here, the flowcharts of FIGS. 3 and 4 will be described with reference to FIG. 1, but since the description has already been given with reference to FIG. 1, only the flow of power on and off will be described briefly.

  When the main switch 304 is turned on, power is supplied to the controller 20 via the power supply circuit 305 (step S1). Then, the controller 20 outputs Main P ON signal and Ready P ON signal to the control lines 341 and 342 by hardware logic (Step S2), and the relay 306 for holding the input power source and the main power source The relays 307 and 308a are turned on (step S3), and power is supplied to the copying machine main body 10 (step S4). At this time, power is also supplied to the HDD of the controller 20 via the power supply circuit 309.

  When the initial processing in the controller 20 is completed (step S5), the controller sets Main P ON signal and Ready P ON signal as software and sets the output ports of the control lines 341 and 342 to Active logic (Main P ON signal, Ready). A state in which P ON signal is output) (step S6).

  In step S7, the start of the copying machine is detected (not shown) (step S7), copy job processing (step S8), or image data for recording an image using the copying machine as a printer via the network. Is monitored (step S7). When the image data is transmitted, the controller 20 instructs the copying machine body 10 to execute the job, and communicates the image data to the copying machine body 10. Job processing for recording an image in the copying machine is performed (step S8). When it is determined in step S7 that the processing should be shifted to the job processing as described above, after the job processing is performed in step S8, or when it is determined in step S7 that the job processing is unnecessary at this time, directly. The signal line 331 is monitored to determine whether or not the main switch 304 is off (step S9). When the main switch 304 is off, the data in the controller is saved (step S21 in FIG. 4). ), The logic of the output ports of the control lines 341 and 342 of the controller 20 is set to the inactive logic that stops the output of the Main P ON signal and the Ready P ON signal (step S22), thereby turning off all the power.

  If it is determined in step S9 in FIG. 3 that the main switch 304 has not been turned off, it is determined whether or not to shift to the low power mode (step S10). Here, it is determined that the low power mode should be entered when a predetermined time elapses without the instruction of the next job after the execution of the job is completed in the copying machine.

  When it is determined that the mode should be shifted to the low power mode, the controller 20 sets the output port of the control line 342 to the inactive logic instructing to stop the output of the Ready P ON signal (step S11). As a result, the power of the copying machine main body 10 is turned off.

  If it is determined that the job is to be transferred while in the low power mode, the controller 20 sets the output port of the control line 342 to the Active logic instructing to output the Ready P ON signal (step S24). As a result, the power of the copying machine main body 10 is turned on, and job processing is executed (step S8 in FIG. 3).

  If it is determined in step S23 that it is not time to shift to a job, the state of the main switch 304 is monitored (step S26). If it is detected that the main switch 304 is turned off, the flow proceeds to step S21, and the same as above. The data is saved and the power is turned off.

  When it is determined in step S26 that the main switch is in the on state, the process proceeds to step S27, and it is determined whether or not the state is to be shifted to the sleep mode.

  In the present embodiment, it is determined that the mode should be shifted to the sleep mode when the low power mode continues for a predetermined time after shifting to the low power mode.

  When it is determined in step S27 that the mode should be shifted to the sleep mode, the controller 20 indicates the logic of the output ports of the control lines 341 and 342 to indicate that the output of Main P ON signal and Ready P ON signal should be stopped. The inactive logic is set (step S28). Then, the input power holding relay 306 and the other relays 307 and 308 are all turned off, and the power supply on the copying machine side and the power supply of the controller HDD are turned off (step S29).

  If it is determined that the job is to be transferred in the sleep mode (step S30), the controller outputs Main P ON signal and Ready P ON signal to the output ports of the two control lines 341 and 342. The logic is set to the active logic instructing what should be done (step S31), whereby all the relays 306, 307, 308a are turned on (step S32), and the job processing is executed (step S8 in FIG. 3).

  If the main switch 304 is turned off while in the sleep mode (step S33), the controller 20 is also in a power-off state, thereby turning off all power.

It is a circuit block diagram showing one embodiment of a power supply system of the present invention. It is a schematic circuit diagram of the part which outputs Main PON signal to a control line of a controller. It is a figure which shows the first half part of the flowchart which shows the flow of operation | movement of power supply on and off in the electric power supply system shown in FIG. It is a figure which shows the second half part of the flowchart which shows the flow of operation | movement of the power supply on and off in the electric power supply system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Copying machine main body 11 Fixing device 20 Controller 30 Power supply device 301 Plug 302 Leakage breaker 303 Noise filter 304 Main switch 305 Power supply circuit 306,307 Relay 308 Power supply circuit 308a Relay 309, 310, 311 Power supply circuit 331, 332, 333 Signal line 341, 342 Control line

Claims (4)

A controller that controls a copying machine that reads a document image to obtain an image signal and records on the sheet a copy image obtained by copying the document image based on the image signal; and the power received from a power inlet and the copying machine In a power supply system comprising a power supply device that supplies the controller,
The power supply is
A first power supply circuit that generates power for the controller and supplies the power to the controller;
An on / off operation is performed for turning on and off power, and a first power supply path that connects the power inlet and the first power supply circuit is generated by the on operation, and the first power supply path is turned on by an off operation. The main switch to shut off,
The on / off control by the controller is received, and by the on control, a second power supply path that bypasses the main switch and connects the power intake and the first power supply circuit is generated, and by the off control, A first switch circuit for cutting off the second power supply path;
A second power supply circuit that receives on / off control by the controller, generates power for the copying machine by on-control, and supplies the power to the copying machine;
The controller monitors the network and transfers the image signal of the job transmitted via the network to the copying machine, and the first time when a predetermined time elapses without transmission of the job. When the low power mode is switched to the low power mode for stopping the power supply by the two power supply circuits and the low power mode continues for a predetermined time, the second power supply path is connected to the first switch circuit. power supply system, characterized in that is cut off, the power supply to the I that the controller off operation of the main switch is to transition to a sleep mode that enables stopping.   2. The controller according to claim 1, wherein the controller is in a hardware state in which the first switch circuit is turned on in an initial state immediately after receiving the power supplied from the first power supply circuit. Power supply system.   2. The first switch circuit operates with a signal having the same voltage as the voltage of power supplied to the controller by the first power supply circuit as an ON control signal. Power supply system.   The third power supply circuit is disposed between the power inlet and the second power supply circuit, receives on / off control from the controller, and connects the power inlet and the second power supply circuit by the on control. 2. The power supply system according to claim 1, further comprising a second switch circuit that generates a power supply path and shuts off the third power supply path by off control.

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