JPH02192069A - Optical disk identifying method, manufacture of cartridge type optical disk, and optical disk cartridge - Google Patents

Abstract

PURPOSE:To identify the identification of >=2 bits with simple structure by changing the opening state of a hole part provided in a cartridge and applying more than the four types of the identification information. CONSTITUTION:When an optical disk 5 housed in a cartridge 1 is identified by a drive device, more than the four types of the identification information are applied by changing the opening state of a hole part 3 provided in the cartridge 1 by moving a tab 4. Then, the opening state is detected by a sensor provided in the drive device and more than the four types of the identification information are obtained. Thus, the information of >=2 bits can be detected with the simple structure to arrange >=2 types of the sensors.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an optical disc identification method, a cartridge type optical disc manufacturing method, and an optical disc cartridge.

<Prior Art> Various optical reproduction-only disks, optical recording disks, and magneto-optical recording disks have been developed and are used for various document files, image files, and the like.

These optical disks must be used while being housed in a case to protect them from dust, and due to their simplicity, there has been a movement in recent years to use them housed in standard cartridges of the same type as floppy magnetic disks.

Incidentally, in a floppy disk cartridge, for example, a 3.5-inch cartridge, it is standard that a so-called write protect tab is provided at the end of the cartridge.

This write protect tab 40 is formed as shown in FIG. 14.

That is, an opening 21 is formed in the upper shell 11 constituting the cartridge 1, and a larger opening 25 is formed in the lower shell 15. A through hole 3 is formed as a protect hole between the openings 21 and 25, and a tab 40 is provided within the through hole 3 so as to be movable in the direction of arrow a.

In this case, the illustrated state is a state in which the overlapping portions of the openings 21 and 25 of the through hole 3 are not covered, and recording is not possible.

On the other hand, when the tab 40 is pushed upward in the figure from the illustrated state, the overlapping portion of the openings 21 and 25 of the through hole 3 is covered, and a recordable state is achieved.

Such a state is detected by installing a sensor switch, which is a mechanical sensor, in the drive device and inserting the sensor switch from the direction indicated by the arrow in the figure, based on the insertion depth.

In this case, the sensor switch detects two states: recordable and recordable.

A proposal has also been made to make such a write protect tab a standard for cartridge type optical discs as well.

<Problems to be Solved by the Invention> By the way, various standards and types of optical discs have been developed, and it would be convenient if discs of various standards could be used in the same drive device. Various developments have been made.

If optical discs of different standards and types are to be used in the same drive device, the drive device needs to identify the standards and types of the optical discs.

In this case, even with a cartridge type optical disc, two types of information can be identified by using the write protect tab.

However, only 1 bit of information can be identified, which is not satisfactory for use with optical discs.

So, when trying to add new information to the disk,
Holes, recesses, etc. must be newly standardized and provided in the cartridge.

The main objects of the present invention are to provide an optical disk identification method that can identify two or more bits of identification information with a simple structure, a cartridge-type optical disk manufacturing method advantageous thereto, and an optical disk cartridge.

<Means for Solving the Problems> Such objects are achieved by the following inventions (1) to (7).

(1) When identifying an optical disc housed in a cartridge with a drive device, four or more types of identification information are given by changing the opening state of the hole provided in the cartridge, and a sensor provided in the drive device An optical disc identification method, characterized in that the opening state is detected and four or more types of identification information are obtained.

(2) the cartridge has a first opening on one main surface and a second larger opening on the other main surface;
The optical disc according to (1) above, wherein two or more tabs are movably provided in the through hole between the first and second openings, and the shielding state of the through hole can be changed by movement of the tabs. Identification method.

(3) The sensors are two or more mechanical sensors or optical sensors, and the shielding state of the through hole is
The optical disc identification method according to (2) above, wherein the optical disc identification method can be detected based on the penetration depth of the mechanical sensor into the through hole or the intensity of transmitted light through the through hole of the optical sensor.

(4) A method for manufacturing a cartridge-type optical disc, characterized in that four or more cartridges having holes with different opening states are prepared, and each type of optical disc is stored in a predetermined cartridge.

(5) A cartridge for storing an optical disk, which has a first opening on one main surface, a second larger opening on the other main surface, and a gap between the first and second openings. An optical disc cartridge characterized in that a tab is fixed to cover part or all of a through hole.

(6) A cartridge for storing an optical disk, which has a first opening on one main surface and a second larger opening on the other main surface, and has a gap between the first and second openings. An optical disc cartridge characterized by having a through hole formed therein.

(7) A cartridge for storing an optical disk, which has a first opening on one main surface, a second larger opening on the other main surface, and a gap between the first and second openings. An optical disc cartridge characterized in that two or more tabs are movably provided in the through hole, and the shielding state of the through hole is changed by the movement of the tabs.

<Operation> According to the present invention, two or more types of sensors can be arranged to detect two or more bits of information.

<Embodiment> FIGS. 1 and 2 show an embodiment of a cartridge type optical disc of the present invention.

The cartridge 1 of this cartridge disk is formed from an upper shell 11 and a lower shell 15 (clamp side), and rotatably accommodates an optical disk 5 therein.

Further, the cartridge is provided with a shutter 6 for recording and reproducing within the drive device.

The cartridge 1 of the present invention thus has a structure similar to that of a cartridge for a 3.5-inch floppy disk.

Similar to the floppy disk cartridge, a hole similar to a write protect hole, that is, a through hole 3 is formed between the main surfaces of the cartridge in a portion where the optical disk 5 is not present.

That is, as shown in FIGS. 3 to 6, an opening 21 is provided in the upper shell 11, and an opening 25 having a larger area than the opening 21 is provided in the lower shell 15 on the clamp side.

The opening 21 of the upper shell 11 has an area approximately half that of the opening 25, and is provided at a position approximately corresponding to the optical disk side half of the opening 25.

A through hole 3 is formed between the widths 21 and 25.

Since the opening 25 has a larger area than the opening 21, the through hole 3 has a portion where the opening 21.25 overlaps and a portion where the opening 21.25 does not overlap.

In the present invention, the through hole 3 of the same type as the write protect hole of the conventional floppy disk cartridge is used as a hole, and the opening or shielding state of this hole is changed, and this is used as identification information according to the optical disk. It is something.

In the example shown in FIGS. 3 to 6, there are four types of identification information.

In these cases, the tab 4 is inserted into the opening 2 in the through hole 3 in FIG.
1.25 is fixed to the non-overlapping portion, and a part of the through hole 3 is shielded.

Further, in FIG. 4, a tab is fixed to the overlapping portion of the openings 21, 25, and a part of the through hole 3 is blocked in a different state from that in FIG.

Furthermore, in FIG. 5, there is no tab inside the through hole 3;
The through hole 3 is open.

Further, in FIG. 6, the tab 4 is fixed to cover the large-area opening 25, so that the entire through hole 3 is blocked.

In the present invention, the cartridge 1 having at least four different opening states is used, and preferably two or more sensors are used to detect the opening state.

That is, preferably two
Three or more sensors are provided, and each sensor detects the opening and closing of one opening as 1.0.

As the sensor, a mechanical sensor switch may be used, or various sensors such as an optical sensor may be used.

In the example shown in FIGS. 3 to 6, sensor switches A and B are arranged in the drive device at positions corresponding to the overlapping and non-overlapping portions of the openings 21.25, and are moved from the direction of the arrow shown in the figure. It is inserted and four opening states are detected.

Furthermore, in the example shown in FIG. 7, within the drive device,
Light from the light source 9 is irradiated from the opening 21 side of the upper shell 11, preferably from the upper side thereof, and the optical sensors 8 are provided in the overlapping portions and non-overlapping portions of the openings 21.25, respectively.
Four opening states of the through hole 3 are detected by changing the amount of transmitted light to 1.85. In this case, optical sensor 81.
85 may be for detecting the amount of reflected light.

In such a case, the four or more types of identification information include, for example, two or more of the following.

1) Is it a recordable disc or a playback-only disc?

2) Is the reflectance higher or lower than a predetermined value?

3) Is the reflectance at the recording point higher or lower than the surrounding area?

4) Whether the disc was written or formatted with a different recording method.

5) Single-sided disc or double-sided disc?

Therefore, such identification information may be associated with four or more changes in the opening state, and a cartridge-type optical disc may be manufactured by storing the identification information in a cartridge with the corresponding opening state according to the type of optical disc manufactured.

That is, cartridges with different opening states are used during manufacturing depending on the type of built-in disk.

On the other hand, for example, there are cases where the user wants to add the following identification information to the optical disc.

a) Recordable or not recordable? b) Is it used for both programs and data, or only for data?

In such a case, the tab 4 or one or both of the tabs 4 can be slid and moved inside the through hole 3 by guide grooves provided on the inner wall surface of the shell 11.15. It may be possible to fix it.

At this time, the structure is such that the position of the tab 4 disposed within the cartridge can be moved depending on the intended use of the built-in disk.

An example in which the tab is divided into two tabs 41 and 45, each of which can be moved, is shown in FIGS. 8 to 17.

In this example, tabs 41.45 each having a rectangular plate-shaped body 411.451 are arranged inside the cartridge.

A guide groove 71 for the tab 41 extending in the vertical direction in the drawing, and a guide for the tab 45 extending in the horizontal direction in the drawing.
R72 is formed.

Ribs 415 that fit with the guide grooves 71 are formed on both sides of the main body 411 of the tab 41.
1 is movable in the vertical direction in the drawing.

Furthermore, an arm portion 417 having a claw 416 is provided on the upper portion of the main body 411 of the tab 41 and extends in the vertical direction in the figure.

On the other hand, a locking portion for locking the claw 416 is provided on the inner wall of the shell 15. The locking portion 76 is provided at three positions with different heights, and by changing the locking position of the tab 41 in three stages, the opening state of the opening 25 can be changed in three values. ing.

On the other hand, guide grooves 7 are also formed on both sides of the main body 451 of the tab 45.
A rib 455 is formed to fit the tab 2, thereby allowing the tab 41 to move in the horizontal direction shown.

A groove 452 is formed in the upper part of the main body 451 of the tab 45.
Further, a rib 453 is formed at the lower part, and locking portions 78.7 are formed on the shell 15 and the shell 11, respectively.
7 is formed.

As a result, the tab 45 is fixed on the shell 11 side by fitting the groove 452 and the locking part 78, and on the shell 15 side, the tab 45 is fixed by fitting the rib 453 into the locking part 77. It is configured to

Furthermore, a through hole 49 is formed in the shell 11 for pressing and moving the tab 45 from the outside with a rod-like instrument.

Furthermore, the opening 2 of the body 411.451 of the tab 41.45
Holes 418, 428 are formed on the 5 side, and the tabs 41, 45 can be moved from the outside with a rod-like instrument, if necessary, through the notches 79 of the shell 15. .

Further, the tab 41 has a rib 412 below the main body 411, the tab 45 has a rib 452 above the main body 451 that can be fitted with the tab 41, and the tabs 41 and 45 are fitted together and integrated It is structured so that it can be digitized.

With this configuration, the user can change the opening state in four ways shown in FIGS. 8 to 17.

In addition, one of the tabs 41, 45 may be fixed or omitted to serve as identification information during manufacturing, and the other tab 41, particularly located in the overlapping portion of the opening 21, 25, may be movable, and this may be used as recordable or non-recordable information. It may also be used for identification.

Alternatively, the tab 4 that covers the entire opening 25 shown in FIG. 6 can be made movable to change the shielding state of the opening 25.

The movement or presence or absence of the tab within the through hole 3 is detected by two or more sensors provided in the drive device.

<Effects> According to the present invention, the identification information is expanded by one bit or more, and the identification information of optical discs of different standards and types can be notified to the drive.

Moreover, there is no need for the cartridge to have a special structure.
Further, the drive device does not require a complicated mechanism.
In this case, the conventional write protect hole can be used as is, so if this is used as a standard, the identification of recordable and non-recordable will be the same, and new information can be added in combination with information from the newly added sensor. A cartridge-type disk with extremely high compatibility between devices is realized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the cartridge type optical disc of the present invention when viewed from the clamp side. FIG. 2 is a perspective view showing the state of FIG. 1 when viewed from the front side. 3 to 6 are partially enlarged cross-sectional views showing different examples of the cartridge type optical disc and the optical disc identification method of the present invention, respectively. FIG. 7 is a partially enlarged cross-sectional view showing another example of the optical disc identification method of the present invention. FIG. 8 is a partially enlarged plan view showing another cartridge type optical disc of the present invention. FIG. 9 is a sectional view taken along the line IX-IX in FIG.
0 and 11 are cross-sectional views taken along the lines XX and XI-XI in FIG. 9, respectively. Figures 12, 14 and 16 are respectively
FIG. 9 is a partial vertical cross-sectional view corresponding to the section taken along the line XX in FIG. 9 for explaining the operation of the cartridge-type optical disc shown in the figure. Figures 13, 15 and 17 are the first
FIG. 9 is a partial cross-sectional view corresponding to the section taken along the line XI-XI in FIG. 2, FIG. 14, and FIG. 16; FIG. 18 is a partially enlarged cross-sectional view showing a conventional cartridge type magnetic disk. Explanation of symbols 1...Cartridge 11...Upper shell 15...Lower shell 21.25...Opening 3...Through hole 4.40.41.45...Tab 411.451...・Body 412.453...Rib 452...Groove 415.455...Rib 416...Claw 417...Arm 418.458...Hole 5...Optical disc 6...Shutter 71.72...Guide groove 75...Through hole 76.77.78...Locking part 79...Notch part 81.85...Light sensor 9...Light source patent applicant T.D. K Co., Ltd. Representative Patent Attorney Hikaru Ishii Patent Attorney
Increase 1) Tatsuya FIG, 9 FIG, 11

Claims (7)

[Claims] (1) When identifying an optical disc housed in a cartridge with a drive device, four or more types of identification information are given by changing the opening state of the hole provided in the cartridge, and a sensor provided in the drive device An optical disc identification method, characterized in that the opening state is detected and four or more types of identification information are obtained. (2) the cartridge has a first opening on one main surface and a second larger opening on the other main surface;
The optical disc identification according to claim 1, wherein two or more tabs are movably provided in the through hole between the first and second openings, and the shielding state of the through hole can be changed by moving the tabs. Method. (3) The sensors are two or more mechanical sensors or optical sensors, and the shielding state of the through hole is
3. The optical disc identification method according to claim 2, wherein detection is possible based on the penetration depth of the mechanical sensor into the through hole and the intensity of transmitted light through the through hole of the optical sensor. (4) A method for manufacturing a cartridge-type optical disc, characterized in that four or more cartridges having holes with different opening states are prepared, and each type of optical disc is stored in a predetermined cartridge. (5) A cartridge for storing an optical disk, which has a first opening on one main surface, a second larger opening on the other main surface, and a gap between the first and second openings. An optical disc cartridge characterized in that a tab is fixed to cover part or all of a through hole. (6) A cartridge for storing an optical disk, which has a first opening on one main surface and a second larger opening on the other main surface, and has a gap between the first and second openings. An optical disc cartridge characterized by having a through hole formed therein. (7) A cartridge for storing an optical disk, which has a first opening on one main surface, a second larger opening on the other main surface, and a gap between the first and second openings. An optical disc cartridge characterized in that two or more tabs are movably provided in a through hole, and the shielding state of the through hole is changed by the movement of the tabs.