JPH05144165A - Disk Cartridge Disk Detection Device - Google Patents

Abstract

(57) [Summary] [Purpose] The attributes of a disc are displayed depending on whether or not a disc type identification hole and a recording prohibition hole are provided in two predetermined parts of the cartridge in which the disc is stored. In the disc detection device of the disc cartridge, which detects the respective holes of the disc cartridge by different sensors to detect the attribute of the disc, the presence or absence of the disc in the cartridge of the disc cartridge is also detected. Suggest what you can do. In the disc detecting device of the disc cartridge, the cartridge 2 of the disc cartridge
3 types of attributes of the disc 1 and presence / absence of the disc 1 are indicated according to presence / absence of the disc type discrimination hole 3 and the recording prohibition hole 4 of FIG. Are detected by the respective sensors 15 and 16 to detect the three types of attributes of the disc 1 and the presence or absence of the disc 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc detecting device for a disc cartridge.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a high reflectance reproduction-only disc (having a reflecting surface made of aluminum) having the same shape, the same structure, and the same size, and a low reflectance reproducing-only disc (having a stainless steel reflecting surface). Disc cartridge in which any one of a magneto-optical (MO) disc in a recording prohibited state and a magneto-optical (MO) disc in a recording permitted state is housed in a cartridge 2 having the same shape, the same structure and the same size. Is proposed. The presence or absence of the holes 3 and 4 with or without the discriminating hole 3 for disc reflectivity and the disc 4 for prohibiting recording are provided at two predetermined portions of the corner of the back surface of the cartridge 2 of such disc cartridge. The four attributes of the disc shown in Table 1 below are represented by. In Table 1, “◯” indicates the case where the holes 3 or 4 were present, and “X” indicates the case where they were not present.

[0003]

[Table 1]

Further, the recording / reproducing apparatus for such a disc cartridge is provided with separate sensors each consisting of a micro switch for detecting the presence or absence of the reflectance determining hole 3 and the recording inhibiting hole 4 of the disc, and the disc loaded by this. The four attributes of the cartridge are automatically detected. In this case, when the holes 3 or 4 are present, the micro switch as a sensor is turned off, and when not present, it is turned on.

In the conventional disc cartridge recording / reproducing apparatus, the presence / absence of a disc in the disc cartridge cannot be detected depending on the presence / absence of the reflectance determination hole 3 and the recording prohibition hole 4 in the disc. In the conventional disc recording / reproducing apparatus, the presence / absence of the disc in the cartridge is detected by whether or not the focus servo of the optical head is applied to the disc of the disc cartridge loaded therein.

That is, the focus servo may not be applied when the recording / reproducing apparatus is vibrated during the focus search or the focal point on the disk is soiled. ,
The focus search is repeated a predetermined number of times, and when the focus servo is still not applied, it is determined that there is no disk in the cartridge.

[0007]

As in the conventional recording / reproducing apparatus for a disc cartridge, the presence / absence of the disc in the cartridge of the disc cartridge is determined by whether or not the focus servo of the optical head is applied to the disc. It takes a considerable amount of time to detect the presence / absence of a disk, and power consumption during that time is wasted, which is a problem particularly in the case of battery drive. This is a phenomenon that often occurs especially when the play button is operated while the hold switch of the operation button is released. Further, it is not preferable to provide a dedicated sensor composed of a switch in order to detect the presence or absence of a disc in the disc cartridge, since this leads to an increase in the number of parts.

In view of the above point, the present invention discriminates the disc attribute depending on whether or not the disc type discriminating hole and the recording prohibiting hole are provided in two predetermined portions of the cartridge in which the disc is housed. In the disc detecting device of the disc cartridge, the presence or absence of the disc type discriminating hole and the recording prohibition hole of the disc cartridge are detected by different sensors to detect the disc attribute. An attempt is made to propose a cartridge that can detect the presence or absence of a disk in the cartridge.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a disc type discriminating hole 3 and a recording prohibiting hole 4 are provided at two predetermined portions of a cartridge 2 in which a disc 1 is housed. The presence or absence of the type discriminating hole 3 and the recording inhibiting hole 4 of the disc 1 of the disc cartridge for indicating the attributes of the disc 1 are detected by different sensors 15 and 1, respectively.
In the disc detecting device of the disc cartridge which detects the attributes of the disc 1 by detecting the disc type discriminating hole 3 and the recording prohibition hole 4 of the disc cartridge 2 of the disc cartridge, Three types of attributes and the presence / absence of the disc 1 are displayed, and the type discrimination hole 3 and the recording prohibition hole 4 of the disc 1 are shown.
The presence / absence of the disc 1 is detected by the respective sensors 15 and 16 to detect the three types of attributes of the disc 1 and the presence / absence of the disc 1.

[0010]

According to the present invention, the presence / absence of the type discriminating hole 3 and the recording prohibiting hole 4 of the disk 1 is determined by the sensors 15, 16 respectively.
The three types of attributes of the disc 1 and the presence / absence of the disc 1 are detected.

[0011]

Embodiments of the present invention will be described in detail below with reference to FIG. As shown in FIGS. 1 and 2, the disk cartridge recording / reproducing apparatus of FIG. 1 has the same shape, structure, and size as the conventional high reflectance reproduction-only disk (the reflecting surface is made of aluminum. ), A low reflectance reproduction-only disc (a reflecting surface of which is made of stainless steel), a disc 2 which is a magneto-optical (MO) disc in a recording prohibited state or a magneto-optical (MO) disc in a recording permitted state has the same shape, A disk cartridge housed in a cartridge 2 having the same structure and the same size is loaded.

Disc 1 of such disc cartridge
Is driven to rotate by a spindle motor 8. Recording, reproduction and erasing of information signals on the disc 1 are performed by the optical head 9. The servo circuit 10 applies focus servo and tracking servo of the optical head 9. With the laser drive circuit 11,
The control of the drive current at the time of recording, reproducing and erasing on the laser diode of the optical head 9 and the control of the modulation of the drive current are performed. The CPU 12 controls the servo circuit 10, the laser drive circuit 12, and the like. A display 13 such as a CRT and a keyboard 14 are connected to the CPU 12.

Now, the reflectance discriminating hole 3 and the recording prohibiting hole 4 similar to those of the conventional disc are provided or not provided at two predetermined portions of the corner of the back surface of the cartridge 2 of the disc cartridge. By the presence or absence of the holes 3 and 4, as shown in Table 2 below, three attributes of the disc and the presence or absence of the disc which are different from those of the conventional Table 1 are indicated. In Table 2, “◯” indicates the case where the holes 3 or 4 are present, and “X” indicates the case where there is no.

[0014]

[Table 2]

In the disk cartridge recording / reproducing apparatus, the presence / absence of the reflectance determining hole 3 and the recording inhibiting hole 4 of the disk provided in the cartridge 2 of the disk cartridge loaded therein is detected as in the conventional case. Separate sensors 15 and 16 are provided, each of which comprises a microswitch. In this case, when the cartridge 2 of the loaded disk cartridge has the holes 3 or 4, the microswitches 15 and 16 as sensors are turned off, and when they are not present, they are turned on. The detection signals based on the on / off state of the switches from these sensors 15 and 16 are sent to the CPU 1
2 is supplied to the CPU 12, and then the CPU 12 sets the number 3 shown in Table 2 of the disk 1 of the loaded disk cartridge.
The three attributes and the presence / absence of the disc 1 are discriminated to control the recording system and the reproduction system of the recording / reproducing apparatus, and the three attributes and the presence / absence of the disc 1 are displayed on the display unit 13.

[0016]

As described above, according to the present invention, the attribute of a disc is discriminated depending on whether or not the disc type discriminating hole and the recording prohibiting hole are provided at two predetermined portions of the cartridge in which the disc is housed. In the disc detecting device of the disc cartridge, the presence or absence of the disc type discriminating hole and the recording prohibition hole of the disc cartridge are detected by different sensors to detect the disc attribute. It is possible to obtain a cartridge that can detect the presence or absence of a disk in the cartridge.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a disc cartridge.

[Explanation of symbols] 1 disc 2 cartridge 3 disc reflectance determination hole 4 recording prohibition hole 5 shutter 12 CPU 15 sensor (switch) 16 sensor (switch)

Claims (1)

[Claims] 1. A cartridge containing a disk
The disc type discrimination hole and the recording prohibition of the disc cartridge in which the disc attributes are expressed according to whether or not the disc type discrimination hole and the recording prohibition hole are provided in a predetermined portion of the place. In the disc detection device of the disc cartridge, which detects the presence or absence of the hole by each sensor to detect the attribute of the disc, the presence or absence of the disc type discrimination hole and the recording prohibition hole of the disc cartridge cartridge. 3 types of attributes of the disc and the presence / absence of the disc are represented, and the presence / absence of the type discrimination hole and the recording prohibition hole of the disc is detected by the respective sensors, and the 3 types of the disc are detected. The disc cartridge disc is characterized in that the type attribute and the presence or absence of the disc are detected. Disk detection device.