JPH01119980A - Air-cooled controller of disk drive device - Google Patents

Abstract

PURPOSE:To control noise and to reduce consumption power by rotating a fan only when a floppy disk is inserted into a disk drive device (FDD) in accordance with the detection output of a disk detection means. CONSTITUTION:The fan 7 does not rotate only when a power source is turned on. When the floppy disk 14 is inserted into the FDD1, a fan rotational command is transmitted from a MPU2, and the fan 7 rotates by a fan drive circuit 8 according to the command. When the floppy disk 14 is picked out from the FDD1 when the fan 7 rotates, a fan stop command is transmitted from the MPU2 and the fan 7 stops by the command. Consequently, the fan 7 rotates only when the floppy disk 14 is inserted into the FDD1. Thus, noise can be controlled and consumption power can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air cooling control device for a disk drive device installed in an electronic device such as an electronic cash register.

[Prior Art] A floppy disk as a recording medium driven by a disk drive device has a usable temperature condition of about 10
℃ to 51.5℃, and when a disk drive device is installed in an electronic device such as an electronic cash register, if the guaranteed temperature of the device is 45℃, the internal temperature of the device will rise by 6.5℃. I had to keep it under control. For this reason, in this type of equipment, a fan is installed near the disk drive unit, and the fan rotates in response to the power being turned on to provide forced air cooling to prevent the temperature inside the equipment from rising more than 6.5 degrees. was.

[Problem to be solved by the invention] However, in this case, although it is the floppy disk that requires cooling by the fan, the fan is constantly rotating in response to the power being turned on, and as a result, the floppy disk is This caused serious problems as the fan continued to rotate even when no disk was inserted, resulting in increased noise and power consumption.

Therefore, the present invention provides a disk drive device that can perform air cooling by rotating a fan only when a floppy disk is inserted into the disk drive device, thereby reducing the noise caused by the fan and the power consumption. The present invention aims to provide an air cooling control device.

[Means and operations for solving the problems] The present invention provides disk detection means for detecting that a floppy disk is inserted into the main body of a disk drive device that drives a floppy disk, and a disk detection means that responds to the detection output from this means. The disk drive device is equipped with an air cooling control means for air cooling the main body of the disk drive device by rotating a fan.
The fan is designed to rotate only when the Tsee disk is inserted.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram schematically showing the circuit configuration of an electronic device such as an electronic cash register or a word processor equipped with a disk drive device (hereinafter referred to as FDD) 1 for driving a floppy disk. In the figure, reference numeral 2 denotes a microprocessor (hereinafter abbreviated as MPLJ) constituting the main body of the control unit, which has a built-in timer, etc., and which processes data such as ROM (read-only memory) and RAM ( A memory section 4 consisting of a random access memory (random access memory), an FDD controller 5, and an input/output capotro are connected.

The FDD controller 5 controls the operation of the FDDl by exchanging signals with the FDDl, and the controller 5 sends a head load signal, a drive select signal, a motor on signal, a direction signal, and a step signal.

A write data signal, etc. are sent out, and an index signal, a write gate signal, a track 00 signal, a write protect signal, a read data signal, a side select signal, etc. are sent out from the FDDl. Further, the FDDI is provided with a disk sensor (not shown) that optically determines whether or not a floppy disk as a recording medium is inserted, using a light emitting/receiving sensor, for example, and the output of this sensor is R.
It is sent to the FDD controller 5 as an EADY signal. The READY signal becomes active when a disk is inserted, and becomes negative when a disk is not inserted.

A resistor r for driving the fan 7 is installed at the input/output capotro.
A fan drive circuit 8 consisting of a transistor T and a transistor T is connected to the fan drive circuit 8, and latches a signal from the MPU 2 instructing the fan to rotate or stop.

That is, when a fan rotation command is given from the MPU 2 to the input/output capotro, the output becomes active and the transistor T of the fan drive circuit 8 is turned on, causing the fan 7 to
A voltage signal of 2 volts flows and the fan 7 rotates. On the other hand, when a fan stop command is given from the MPU 2 to the input/output capotro, the output becomes negative and the transistor T of the fan drive circuit 8 is turned off, and the voltage signal no longer flows to the fan 7, causing the fan 7 to stop. .

FIG. 2 is a diagram showing an example of mounting an electronic device to which this embodiment is applied, and shows a case where two FDDIs are used.

That is, two FDDIs are arranged in parallel inside the housing 11, and the disk insertion slot 12 of each FDD 1 is provided on the front surface of the housing 11. In addition, the rear surface of the housing 11 and the FDD
A fan 7 is provided between the I and I. And the M
PU2゜memory section 4. The FDD controller 5 and the input/output capotro are mounted on the control board 13. In addition,
In FIG. 2, numeral 14 indicates a floppy disk.

The MPU 2 is configured to execute the flowchart shown in FIG. 3 in response to the power being turned on. That is, when the power is turned on, the FDD controller 5 is instructed to start the motor of FDDl in ST1.

Then, the FDD controller 5 sends a motor-on signal to the FDDl, and the motor of the FDDl rotates.

At ST2, wait until the motor reaches a constant rotation, and when the motor reaches a constant rotation of 5001113 to 60013, the FDDI status is read from the FDD controller 5 at ST3. And REA as ST4
It is determined whether the DY signal is active or not. If it is active, the floppy disk 14 is inserted into the FDDI, so a fan rotation command is output to the input/output capotro to rotate the fan 7 at ST5. At this time, a built-in timer is started in ST6, and the process shifts to normal processing as an electronic device in ST7. On the other hand, if the READY signal is negative in ST4, the floppy disk 14 is not inserted into the FDDI, so the timer is started without rotating the fan 7, and the process proceeds to normal processing.

In addition, the NPU2 mentioned above responds to the start of the timer and outputs the fourth
Execute the timer interrupt processing shown in the figure.

That is, in ST'11, the timer determines whether a certain period of time (for example, one second) has elapsed or not, and when the certain period of time has elapsed, the status of FDD1 is read again as 5T12. Then, as ST'13, it is determined whether the READY signal is active or not, and if it is active, 5T1
4, a fan rotation command is output to the input/output capotro to rotate the fan 7, and if it is negative, a fan stop command is output to the input/output capotro to stop the fan 7 as 5T15.

Thereafter, the timer is reset and restarted at 5T16, and the process returns to the main routine.

In this embodiment configured in this way, the fan 7 does not rotate just when the power is turned on, but when the floppy disk 14 is inserted into 'Fl)Di, a fan rotation command is sent from the MPU 2. The fan 7 is rotated by the fan drive circuit 8 in response to the command. Also, fan 7
When the floppy disk 14 is removed from the FDDl while it is rotating, a fan stop command is sent from the MPLI 2, and the fan 7 is stopped by this command. Therefore, the fan 7 will rotate only when the floppy disk 14 is inserted into the FDDl.

In this way, according to this embodiment, the fan 7 can be rotated to air-cool the inside of the electronic device only when the floppy disk 14 is inserted in the FDDl. In addition to being able to suppress the noise caused by the fan 7 compared to the conventional case in which the fan 7 continues to rotate, it is also possible to reduce power consumption. Further, the rotation of the fan 7 tends to introduce dust into the electronic equipment, which may cause malfunctions, but since the fan 7 rotates only when the floppy disk 14 is inserted, the amount of dust mixed in is reduced, and the service life can be extended.

Note that the present invention is not limited to the above embodiments,
Of course, various modifications can be made without departing from the gist of the present invention.

[Brief explanation of the drawing]

1 to 4 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a schematic block diagram of an electronic device to which this embodiment is applied, and FIG. 2 is a schematic block diagram of an electronic device to which this embodiment is applied. implementation diagram,
FIG. 3 is a flowchart showing the main routine of the MPU, and FIG. 4 is a flowchart showing the interrupt routine of the MPU. 1...FDD (disk drive device body), 2...
・・MPU (Microprocessor), 5...FOD
Controller, 6...I/O board, 7...Fan, 8...Fan drive circuit, 14...Floppy disk. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A disk drive device main body for driving a floppy disk, a fan for air-cooling the main body, a disk detection means for detecting that a floppy disk is inserted into the main body, and a disk drive device that responds to the detection output from this means. An air cooling control device for a disk drive device, comprising: air cooling control means for air cooling the disk drive device main body by rotating the fan.