JP2003333748A - Power source controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power source controller which can prevent an operating power source from being turned off and which can prevent a unit which cannot turn off the power source during the operation from being broken or information from being correctly stored. <P>SOLUTION: The power source controller comprises: one or a plurality of electronic devices; a first power supply means controlled on, off by a mechanical switch; a power control signal generating means for generating a power control signal from the on or off of the first supply means; a second power supply means controlled to be energized by the first power supply means and the power control signal for supplying a power to the electronic device; and an electronic device control means for processing to end the operation of the device when the power off of the first supply means is detected. When the power off of the first supply means is detected, the electronic device control means starts processing to end the device and cuts off the second supply means from the power control signal. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention turns on a power supply during operation.
The present invention relates to a power supply control device for a device that cannot perform FF.

[0002]

2. Description of the Related Art Conventional power-off control has been to shut off the power by a mechanical switch or to end the power by performing a software termination process. Further, like a hard disk, if the power is turned off during operation, the device may be destroyed or information may not be saved correctly.

[0003]

Conventionally, in a system in which a soft power supply control is not possible, the only means for power OFF control is to cut off the power by a mechanical switch. It was destroyed or the information was not saved correctly. Further, in the case where the termination process is performed by software to terminate the power supply, if the termination process hangs, it may be left in a waiting state for termination.

The present invention has been made in view of the above problems, and it is an object of the present invention to prevent a power supply from being turned off during operation, to destroy a device which cannot be turned off during operation, to correct information. It is an object of the present invention to provide a power supply control device that can prevent the data from not being saved.

[0005]

To achieve the above object, the present invention provides one or a plurality of electronic devices, a first power supply means which is ON / OFF controlled by a mechanical switch, and a first power supply means. A power supply control signal generating means for generating a power supply control signal from ON / OFF of the power supply means, and a second power supply for supplying power to the electronic device, which is energized by the first power supply means and the power supply control signal. The electronic device control includes: a supply unit; and an electronic device control unit that performs an operation end process of the electronic device when the power supply of the first power supply unit is detected, and the electronic device control is performed when the power supply of the first power supply unit is detected. The means starts the termination process of the electronic device, and shuts off the second power supply means from the power supply control signal.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a digital copying machine using the power supply control device of the present invention.

Each block will be described below. 10
0 is a main switch that turns on / off the sub power supply 103.
It controls. Reference numeral 101 denotes a main power supply, which supplies power to the main body unit 109.
The OFF state is controlled by the power supply control signal from the delay circuit 102 and the power supply from the sub power supply 103. A delay circuit 102 delays the voltage level of the sub power supply 103 by a CR circuit and outputs it as a power supply control signal. A sub power supply 103 supplies power to the delay circuit 102 and the switching circuit in the main power supply 101.

Further, the power supply state is monitored, and when it is detected that the power is off, a power off detection signal is output to the controller section 105. A scanner unit 104 converts a paper document into electronic data and outputs the electronic data to the controller unit 105. A controller unit 105 controls the entire system, and outputs electronic data input from the scanner unit 104 from the printer unit 106 or stores it in the hard disk 107.

Further, when a power OFF detection signal from the sub power source 103 is received, control is performed to prohibit writing to the hard disk. A printer unit 106 is a controller unit 10.
The image data is output from the electronic data input from 5. A hard disk 107 stores a startup program, image data, management information, and the like. Reference numeral 108 denotes a power supply unit, which includes 100 to 103 and the like. Reference numeral 109 denotes a main body unit, which means the entire digital copying machine except the power supply unit.

Next, FIG. 2 shows the power supply control device of the present invention shown in each functional block relating to power supply control, and FIG. 3 shows a detailed circuit, so that the function is associated with the actual system.

First, reference numeral 200 is a mechanical switch for performing ON / OFF control of the first power supply means 201, and the main switch 100 corresponds to this. Reference numeral 201 denotes a first power supply means, which outputs a power-off detection signal when it detects that the power supply is off, and a power control signal generation means 2
02 and the second power supply means 203 are means for supplying power to the switching circuit 302, and the sub-power supply 103 corresponds to this means.

The switching circuit 302 is turned on when the first power supply means is energized and turned off when the voltage level of the CR circuit 301 is lowered. Specifically, it is shown in the timing chart of FIG. Reference numeral 202 denotes a power supply control signal generating means, which delays the power supplied from the first power supply means 201 by the CR circuit 301.
The delay circuit 102 corresponds to this. Since the time constant of the CR circuit is CR, if the CR value is multiplied by 10, the delay time is also multiplied by 10. Specifically, in the circuit of FIG. 3, C =
Delay time is about 1.5 sec at 10 μF and R = 100 kΩ
(Experimental value).

Reference numeral 203 denotes a second power supply means, which is an ON / O
The FF control is performed by the switching circuit 302 and is a means for supplying power to the main body 206.
1 corresponds to this. Reference numeral 204 denotes an electronic device control unit, which is a unit that performs control such as ending the operation of the electronic device 205 based on the power OFF detection signal input from the first power supply unit 201, and the controller unit 105 corresponds to this. To do. Reference numeral 205 denotes an electronic device, which is an electronic device control means 20.
4 is a device controlled by the hard disk 10
7 corresponds to this. Reference numeral 206 denotes a main body to which power is supplied from the power control device, and the main body unit 109 corresponds to this.

Next, how each functional block relating to power supply control operates when the power supply is turned on / off will be sequentially described with reference to FIGS.

First, the mechanical switch 200 is turned on (step S101). As a result, the first power supply means 201 has the switching circuit 3 included in the power supply control signal generation means 202 and the second power supply means 203.
02 is supplied (step S102). Further, by supplying power to the switching circuit 302,
The relay in the circuit is turned on (step S103). Then, power is supplied to the entire main body, and the main body 206 starts normal operation (step S104). After that, power supply OF
The F detection signal is released, and access to the electronic device 205 is permitted (step S105). This electronic device 205
Switch 20 when access to the
When 0 is turned off, the power-off detection signal is input to the electronic device control means 204, and the operation ending process for the electronic device 205 is started (steps S106 and S107).

After a lapse of a certain time, the potential of the power supply control signal generating means 202 is lowered, the relay of the switching circuit 302 is turned off, and the power supply to the main body 206 is cut off (steps S108 and S109). Here, the fixed time may be any time as long as it is longer than the operation end process, and is a time that can be adjusted by the CR constant included in the delay circuit 301.

As described above, when the power is turned on, power is supplied to the main body almost at the same time as the mechanical switch 200 is turned on. When the power is turned off, a power off detection signal is first generated, and then power is supplied to the relay of the switching circuit 302. Is only from the second power supply means 203, and when the potential of the delay circuit 301 decreases, the power supply to the relay is stopped, the power supply to the main body 206 is cut off, and the entire system is turned off.

[0019]

As is apparent from the above description, according to the present invention, the hardware structure for turning off the power supply with a delay from the turning off of the mechanical switch for a fixed time, and the OF of the mechanical switch.
It has a configuration that detects F, and when the mechanical switch is turned off, the CPU cannot turn off the power during operation. It performs processing to stop the operation of the device, and turns off the power after a certain period of time to turn off the power during operation. Therefore, it is possible to prevent a device which cannot be turned off during operation from being destroyed or information to be stored incorrectly. In addition, since the power is reliably turned off after a certain time has passed since the mechanical switch was turned off, even if the software runs out of control
It is possible to prevent the situation that the FF is not performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a digital copying machine using a power supply control device of the present invention.

FIG. 2 is a diagram showing each functional block of the power supply control device of the present invention.

FIG. 3 is a circuit diagram example of a CR circuit and a switching circuit.

FIG. 4 is a timing chart of the first embodiment.

FIG. 5 is a flowchart of the first embodiment.

[Explanation of symbols]

100 main switch 101 Main power supply 102 delay circuit 103 Sub power supply 104 Skiana part 105 controller section 106 printer section 107 hard disk 108 power supply 109 main body

Claims (3)

[Claims] 1. One or a plurality of electronic devices, a first power supply means that is ON / OFF controlled by a mechanical switch, and a power supply that generates a power control signal from ON / OFF of the first power supply means. Control signal generation means, second power supply means for supplying power to the electronic device, which is energized and controlled by the first power supply means and the power supply control signal, and detection of power off of the first power supply means Then, the electronic device control means for performing an operation end process of the electronic device is included, and when the power-off of the first power supply means is detected, the electronic device control means starts the end process of the electronic device and controls the power supply. A power supply control device characterized by cutting off the second power supply means from a signal. 2. The power supply control signal generated by the power supply control signal generating means is a signal obtained by delaying the power supplied from the first power supply means by a delay circuit. The power supply control device described. 3. The power supply control device according to claim 1, wherein the electronic device is a hard disk.