JPH04195315A - Automatic power supply turning off device - Google Patents

Abstract

PURPOSE:To eliminate an unnecessary time for which a user waits for the end of processing operation required for turning off the power source by the user by automatically cutting off the current of a power source switch device or power unit with the signal from an information processor at the end of the operation. CONSTITUTION:When various processing operations by an electronic computer 2 end, a central processing unit 9 outputs a control signal A to a terminal 12. A discriminating circuit 14 once confirms the specific pattern of this signal the circuit 14 outputs signal B to a driving circuit 16, the electric power that a relay circuit 15 requires is amplified, and a driving signal C is outputted to the relay circuit 15. The relay circuit 15 turns off a 2nd relay 18 and a 3rd switch 11c is turned off, thereby, releasing the self-holding of a 1st relay 17. Thus, the 1st relay 17 turns off and then 2nd switches 11a and 11b turn off to stop supplying the electric power to the electronic computer 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic power-off device applied to information processing devices such as computers and various electronic devices.

(Prior Art) With the spread of electronic computers, so-called personal computers are now being used in small-scale offices and private shops, and forms are often printed using personal computers.

(Problems to be Solved by the Invention) In the above-mentioned personal computer, the general operating method is to turn off the power after the processing operation based on the personal computer is completed in order to reduce power consumption and protect each part.

However, as a user, you cannot finish your work until the power is turned off, and the time wasted while waiting for the personal computer to finish processing becomes a problem in terms of work efficiency.

An object of the present invention is to provide an automatic power-off device that can improve workability when using an information processing device such as a personal computer.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes means for automatically cutting off the power connected to the information processing device when the processing operation by the information processing device is completed. The main feature is that this means is installed in the power switch device of an information processing device that does not have a means to automatically open and close the power supply and that only requires manual operation, or is built into the information processing device. The present invention is characterized in that the power supply device is provided to receive a power-off signal from the central processing unit of the information processing device.

(Function) According to the above means, when the processing operation by the information processing device is completed, the power supply connected to the information processing device is automatically cut off in the power switching device or the power supply device in response to a signal from the information processing device. The user does not have to wait until the processing operation is finished to turn off the power.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing the entire first embodiment of the present invention applied to an electronic computer, in which 1 is a power supply, and 2 is an information processing device that is not equipped with a circuit for automatically shutting off the power. In an electronic computer such as a certain personal computer, 3 is a power switch device provided between a power source 1 and a computer 2.

The electronic computer 2 includes an input device 5 for inputting data 4, an output device 7 for printing out 6, a storage device 8 for storing data, and a central processing unit 9 for performing arithmetic processing on the data. , a power supply device 10 consisting of a transformer, rectifier, etc.
It is equipped with

The power switch 3 also includes a switch 11 that turns on and off the connection between the sword 1 and the power supply 10, and a control signal A that is sent from the central processing unit 9 via the terminal 12 of the computer 2 to turn off the power. The opening/closing device 13 is provided with a receiving opening/closing device 13.

FIG. 2 is a block diagram showing the configuration of the switchgear shown in FIG. A relay circuit 16 is a drive circuit that receives the output B from the discrimination circuit 14 and outputs a drive signal C to the relay circuit 15.

FIG. 3 is a circuit diagram showing the relay circuit of FIG.
is a normally open (NO) type first relay for turning on and off the power supplied to the computer 2, and is a first switch connected to the power supply device 10 of the computer 2. 11a and the second for self-preservation.
It has a switch 11b. Further, 18 turns off the third switch lie by the drive signal C and switches the first relay!
Normally closed to release the self-retention of 7 (Norma, ly
The C1ose, NG) type second relay 19 is a momentary power-on manual switch, and by temporarily turning on this switch 19, the first relay 17 starts self-holding.

The operation of the above embodiment will be explained below.

When the power supply manual switch 19 is turned on, the first relay 1
7 self-holding is started, and the first to third switches 11a N
11c are all turned on, power supply from the power supply l to the power supply unit lO of the computer 2 is started. In this state, data processing in the electronic computer 2 is performed.

Next, the power off operation will be explained with reference to the flowchart of FIG. That is, when various processing operations in the computer 2 are completed (Sl-1), a control signal A is output from the central processing unit 9 to the terminal 12 (Sl-2). This control signal A has a specific pattern as shown in FIG. (b
) Outputs the signal B to the drive circuit 16 at the timing shown in
The drive circuit 16 amplifies the power required by the relay circuit 15 and outputs the drive signal C to the relay circuit 15 (S17
4).

The relay circuit 15 turns off the second relay 18, and releases the self-holding of the first relay 17 by turning off the third switch 11c (,, S, 1, -5). 1st
When the relay 17 is turned off, the first. Second switch 11a, 1
By turning off 1b, the power supply to the computer 2 is stopped (Sl-6).

FIG. 6 is a block diagram showing the entire second embodiment of the present invention, and members corresponding to those of the first embodiment described based on FIGS. 1 to 5 are designated by the same reference numerals.

The difference between the second embodiment and the first embodiment is that the power supply device 20 provided in the computer 2 is provided with a switchgear 13 having the configuration shown in FIG. The point is that the power supplied to the transformer/rectifier 21 constituting the power supply device 20 is cut off by the switch 22 controlled by the switch device 13.

The power off operation of the second embodiment will be explained with reference to the flowchart of FIG. When various processing operations in the computer 2 are completed (S2-1). Central processing unit 9 is connected to signal line 2
3, a control signal related to power off is output to the opening/closing device 13 (S2-2).

In the switchgear 13, as in the first embodiment, it is checked whether the control signal is related to power off (S2'-3), and if it is a control signal related to normal power off, the switch 22 is turned off. Then, the power supplied from the power supply 1 to the transformer/rectifier 21 is cut off (S2-4).

According to the above embodiment, when the computer, which is an information processing device, finishes processing, the power supply from the power source is cut off without the user's intervention, so the user can turn off the computer to turn off the power. There is no need to wait for processing to finish, and power is consumed only when necessary, resulting in power savings. In addition, since the computer is operated only when necessary, it is possible to minimize the physical deterioration of various parts that occur when the computer is used (energized), as well as the impact on the user and surroundings due to heat generation and operating noise. .

In addition, the first embodiment is a computer that does not have a mechanism or circuit for automatically shutting off the power, in other words, the user only has to manually operate the power switch (device) to turn the power on and off. It can also be applied to configurations that require automatic power shutoff, making it easy to add an automatic power shutoff function to computer systems that are already in operation. It is also possible to configure an information processing system with an automatic shutoff function.

(Effects of the Invention) As described above, according to the present invention, when the processing operation by the information processing device is finished, the connection between the information processing device and the power source is automatically disconnected, and the processing operation of the information processing device is terminated. It is possible to provide an automatic power cutoff device that eliminates the need for waiting time and improves the user's work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the entire first embodiment of the present invention applied to an electronic computer, Fig. 2 is a block diagram showing the configuration of the switchgear shown in Fig. 1, and Fig. 3 is a block diagram showing the configuration of the switchgear shown in Fig. 2. A circuit diagram showing the circuit, FIG. 4 is a timing chart of control signals and outputs, and FIG. 5 is a flowchart related to the operation of the first embodiment.
FIG. 6 is a block diagram showing a second embodiment of the present invention, and FIG. 7 is a flowchart relating to the power-off operation of the second embodiment. l...power supply, 2...information processing device, 3...power switchgear, 9...central processing unit, 10, 20...
- Power supply device, 11.22... Switch, 13... Switching device, 14... Discrimination circuit, 15... Relay circuit, 16... Drive circuit. Figure 2 Figure 4 Figure 3 Figure 5

Claims (3)

[Claims] (1) An automatic power cutoff device characterized by comprising means for automatically cutting off a power source connected to an information processing device when the processing operation by the information processing device is completed. (2) An automatic power supply characterized in that the means according to claim (1) is provided in a power supply switching device for an information processing device that does not have a means for automatically switching on and off the power supply and opens and closes the power supply only by manual operation. Cutting device. (3) A claim in which the power supply device built into the information processing device receives a power-off signal from the central processing unit of the information processing device (
1) An automatic power cutoff device characterized by being provided with the means described above.