JPS6230182Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an optical disk recording device that prevents exposure due to erroneous operation.

FIG. 1 shows this type of optical disc recording device.
In the figure, 1 is a recording light source, 2 is an optical modulator, and 3 is a recording light source.
is a shutter, 4 is a condenser lens, and 5 is a disk.

Next, the operation of this recording apparatus will be explained. for example,
Light emitted from a recording light source 1 such as an argon laser is intensity-modulated by an optical modulator 2 according to a recording signal, and is focused by a condensing lens 4 onto a small spot on the surface of a rotating disk 5 for recording. It is done. In such a device, in order to avoid temperature drift of the recording light source 1 and the optical modulator 2,
Before recording, it is necessary to perform a so-called warming-up process in which a light source output required for recording or an output close to it is produced in advance. Then, a shutter 3 is provided to provide dim light so that the disk 5 is not exposed to light during this warming-up, and when recording or as necessary, the shutter 3 is opened to irradiate recording light onto the surface of the disk 5. There is.

However, since such optical disk recording devices are equipped with a recording start switch and a switch for manually opening and closing the shutter, it is possible to accidentally press these switches and open the shutter 3 before recording, resulting in unnecessary exposure. There is a risk that the product may become damaged. In such a case, there is a problem that already recorded information may be destroyed.

This idea was made in view of these conventional problems, and includes a flip-flop that inverts between the state of outputting the exposure enable mode signal and the state of outputting the exposure prohibition mode signal, and the power supply to the device is At the start of supply, the flip-flop is placed in a state where it outputs an exposure prohibition mode signal.
It is an object of the present invention to provide an optical disk recording device that prevents or reduces exposure due to erroneous operation.

An embodiment of this invention will be described below with reference to the drawings. In Fig. 2, 6 is an input terminal to which a recording shutter open signal (signal indicating that recording is in progress) is input to open the shutter 3 during recording, and 7 is a manual shutter for manually opening the shutter. This is an input terminal into which an open signal (a signal generated by manual operation) is input. Here, it is assumed that both shutter open signals command opening when both are high. Also 9
8 is an input terminal to which a negative pulse initialization signal that clears a flip-flop 10 (to be described later) and makes its output low when power supply to the recording apparatus starts, and 8 is an input terminal for the signals of both input terminals 6 and 7. The OR gate 10 is a flip-flop that flips between outputting a high-output exposure enable mode signal and outputting a low-output prohibition mode signal each time the switch 11 is pressed. At times, the exposure inhibit mode is set by a negative pulse initial setting signal at the input terminal 9.
Therefore, although not shown, the initial setting means of the apparatus of the present invention supplies an initial setting signal to the input terminal 9. 12 is an AND gate that ANDs the output of the flip-flop 10 and the output of the OR gate 8; 13 is a shutter drive circuit that drives the shutter 3 by the output of the AND gate 12;

Next, the operation will be explained.

Each time a switch 11 is pressed, the flip-flop 10 is inverted between an exposure enable mode (output high) and an exposure prohibition mode (output low).
When the power supply starts, this flip-flop 10 is set to low by the initial setting signal from the input terminal 9 and enters the exposure prohibition mode. In this exposure prohibition mode, the AND gate 12 does not open, so the shutter drive circuit 13 It does not operate and the shutter 3 remains closed. Therefore, after power supply starts, unless switch 11 is pressed, input terminal 6
Or, even if a shutter open signal is input to 7, the shutter will not open. To open the shutter, the switch 11 is pressed to set the output of the flip-flop 10 to high (exposure enable mode), and then a shutter open signal is input to the input terminal 6 or 7. Thereafter, when there is no need to open the shutter, by pressing the switch 11 again to put the flip-flop 10 in the exposure prohibition mode, exposure due to erroneous operation can be avoided.

As described above, according to this invention, a flip-flop is provided that inverts between the state of outputting an exposure enable mode signal and the state of outputting an exposure prohibition mode signal, and the flip-flop is exposed to light when power supply to the recording apparatus is started. Since the prohibition mode signal is set to be output, the shutter will not open even if the recording start switch or manual shutter open/close switch is pressed by mistake.
This has the effect of improving the safety of the recording device.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional optical disc recording device.
FIG. 2 is a block diagram of an optical disc recording apparatus according to an embodiment of this invention. 1... Recording light source, 2... Light modulator, 3... Shutter, 4... Condensing lens, 5... Disk, 1
0...Flip-flop, 9...Initial setting signal input terminal, 13...Shutter drive circuit.

Claims (1)

[Claims for Utility Model Registration] A recording light source, a light modulator that modulates the light emitted from the recording light source according to a signal, and a shutter that transmits or blocks the output modulated light from the light modulator;
In an optical disk recording device equipped with a condensing lens that condenses the modulated light into a small spot, and a disk on which information corresponding to a signal is written using the modulated light condensed by the condensing lens, each time a switch is pressed. A flip-flop that inverts between a state in which it outputs an exposure enable mode signal and a state in which it outputs an exposure prohibition mode signal, and an initial stage that sets the flip-flop to a state in which it outputs an exposure prohibition mode signal when power supply to the apparatus is started. a setting means; an OR gate that ORs a signal indicating that recording is in progress and a signal generated by manual operation; an AND gate that ANDs the output of the flip-flop and the output of the OR gate; An optical disk recording device comprising: a shutter drive circuit that opens a shutter;