JP2603545B2 - Optical disc cartridge, optical disc identification method, and cartridge type optical disc manufacturing method - Google Patents

Description

The present invention relates to an optical disk cartridge, a method for identifying an optical disk, and a method for manufacturing a cartridge-type optical disk.

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

These optical discs need to be housed in a case in order to avoid dust, and due to their simplicity, there has recently been a movement to house them in standard cartridges of the same type as floppy magnetic discs.

By the way, in the case of a floppy disk cartridge, for example, for 3.5 inches, it is standardized to provide a so-called write protect tab at the end of the cartridge.

The write protect tab 40 is formed as shown in FIG.

That is, an opening 21 is formed in the upper shell 11 and a larger opening 25 is formed in the lower shell 15 of the cartridge 1. A through hole 3 is formed between the openings 21 and 25 as a protect hole, and a tab 40 is provided in 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 portion of the openings 21 and 25 of the through-hole 3 is not blocked, and the recording is not possible. On the other hand, when the tab 40 is pushed upward from the state shown in the figure,
The overlapping portion between the openings 21 and 25 of the through hole 3 is shielded, and a recordable state is established.

Such a state is detected by providing a sensor switch, which is a mechanical sensor, in the drive device, and inserting the sensor switch from the direction of the arrow b in the drawing, thereby detecting the insertion depth.

In this case, the sensor switch detects that recording is possible,
There are two states in which recording is not possible.

Then, a proposal has been made to standardize such a write protect tab even in a cartridge type optical disk.

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

When trying to use optical disks of different standards and types in the same drive device, the drive device needs to identify the standards and types of the optical disk.

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

However, only 1-bit information can be identified, and it cannot be satisfied for an optical disk.

Therefore, in order to add new information to a disc, it is necessary to newly standardize holes, dents, and the like, and provide them in the cartridge.

A main object of the present invention is to provide an optical disc cartridge capable of identifying identification information of 2 bits or more with a simple structure,
An object of the present invention is to provide a method for identifying an optical disk and a method for manufacturing a cartridge-type optical disk.

<Means for Solving the Problems> Such an object is achieved by the present invention described in the following (1) to (6).

(1) A cartridge for storing an optical disk, having a first opening on one main surface and a second opening larger than the other main surface, wherein a first opening is provided between the first and second openings. An optical disc cartridge, wherein a tab for covering a part or all of a through hole is fixed.

(2) A cartridge for accommodating an optical disk, having a first opening on one main surface and a second opening larger than the other on the other main surface, and between the first and second openings. An optical disc cartridge, wherein two or more tabs are movably provided in a through-hole, and the movement of the tab changes a shielding state of the through-hole.

(3) Four or more types of identification information can be given by changing the shielding state by the tab, and four or more types of identification information can be obtained by detecting the shielding state by a sensor provided in the drive device. The optical disk cartridge according to 1) or 2).

(4) Each of the sensors is two or more mechanical sensors or optical sensors, and the shielding state of the through hole is
The optical disc cartridge according to (3), wherein the optical sensor can be detected not only by the depth of penetration of the mechanical sensor into the through hole, but also by the intensity of light transmitted through the through hole of the optical sensor.

(5) When discriminating the optical disk housed in the cartridge by the drive device, the optical disk cartridge of any of the above (1) to (4) is used, and the shielding state of the through-hole is changed to change four or more types. An identification method for an optical disk, to which identification information is added and four or more types of identification information are obtained by detecting the shielding state by a sensor provided in a drive device.

(6) The above (1) to (4) which are different from each other in four or more ways of the shielding state.
(4) A method for manufacturing a cartridge-type optical disk, comprising preparing any one of the cartridges and storing the cartridge in a predetermined cartridge for each type of optical disk.

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

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

The cartridge 1 of this cartridge disk is formed of an upper shell 11 and a lower shell 15 (clamp side), and rotatably accommodates the optical disk 5 therein. The cartridge is provided with a shutter 6 for performing recording and reproduction in the drive device.

As described above, the cartridge 1 of the present invention has the same structure as the cartridge for the 3.5-inch floppy disk.

And, like the floppy disk cartridge,
A hole similar to the write protect hole, that is, a through hole 3 is formed between the cartridge main surfaces in a portion where the optical disk 5 does not exist.

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

The opening 21 of the upper shell 11 is provided at a position substantially corresponding to a half of the opening 25 on the optical disk existence side in an area of almost half of the opening 25.

 Then, the through hole 3 is formed between the openings 21 and 25.

Since the opening 25 has a larger area than the opening 21,
In the through hole 3, the overlapping portion of the openings 21 and 25 and the openings 21 and 25
And non-overlapping parts.

According to the present invention, the through hole 3 of the same kind 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 corresponding to the optical disk. Things.

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

In these cases, the tab 4 is opened in the through hole 3 in FIG.
The through holes 3 are fixed to non-overlapping portions 21 and 25, and a part of the through hole 3 is shielded.

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

Further, in FIG. 5, there is no tab in the through hole 3 and the through hole 3 is open.

In FIG. 6, the tab 4 is fixed so as to shield the large-area opening 25, and the entire through-hole 3 is shielded.

The cartridge 1 having at least four different opening states is used, and in the present invention, the opening state is preferably detected using two or more sensors.

That is, preferably, two or more sensors are preferably provided facing the opening, and each sensor detects 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 FIG. 3 to FIG. 6, the sensor switches A and B are arranged in the drive device at positions corresponding to the overlapping portions and the non-overlapping portions of the openings 21 and 25, and the By inserting, four kinds of opening states are detected.

Further, in the example shown in FIG. 7, light from the light source 9 is irradiated from the opening 21 side of the upper shell 11 and preferably from the upper side thereof in the drive device, so that the overlapping portions and the overlapping portions of the openings 21 and 25 are overlapped. Optical sensors 81 and 85 respectively
The four kinds of opening states of the through hole 3 are detected based on the change in the amount of transmitted light to the through hole 3. In this case, the optical sensors 81 and 85 may detect 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 read-only disc?

2) Whether the reflectance is higher or lower than a predetermined value.

3) Whether the reflectance at the recording point is higher or lower than the surroundings.

4) Whether the disc is written or formatted in a different recording format.

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

Therefore, such identification information may be made to correspond to four or more kinds of changes in the opening state, and stored in a cartridge having the corresponding opening state according to the type of the manufactured optical disk to manufacture a cartridge-type optical disk.

That is, cartridges having different opening states are selectively used at the time of manufacture depending on the type of the built-in disk.

On the other hand, for example, a user may want to assign the following identification information to an optical disc.

a) Whether recording is possible or not b) Whether the program and data are shared or data only

In such a case, the tab 4 or the tab 4
May be divided so that one or both of them can be slidably moved and fixed inside the through hole 3 by a guide groove or the like provided on the inner wall surface of the shells 11 and 15.

In this case, the position of the tab 4 arranged in the cartridge can be moved according to the purpose of use of the built-in disk.

FIGS. 8 to 17 show examples in which the tabs are divided into two tabs 41 and 45, each of which can be moved.

In this example, tabs 41 and 45 having rectangular plate-shaped main bodies 411 and 451 are arranged inside the cartridge.

And a guide groove extending in the illustrated vertical direction for the tab 41
A guide groove 72 extending in the illustrated horizontal direction for the tab 45 is formed.

On both sides of the main body 411 of the tab 41, ribs 415 that match the guide groove 71 are formed, so that the tab 41 can move in the vertical direction in the figure.

Further, an arm 417 having a claw 416 is provided on an upper portion of the main body 411 of the tab 41 so as to extend 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 portions 76 are provided at three different positions with different heights.
By changing the stage, the opening state of the opening 25 can be changed in three values.

On the other hand, on both sides of the main body 451 of the tab 45, ribs 455 that are compatible with the guide grooves 72 are formed.
Is movable in the illustrated horizontal direction.

A groove 452 is formed in an upper part of the main body 451 of the tab 45, and a rib 453 is formed in a lower part thereof. In addition, locking portions 78 and 77 are formed in the shell 15 and the shell 11, respectively.

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

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

Further, holes 418, 428 are formed on the opening 25 side of the main bodies 411, 451 of the tabs 41, 45, and if necessary, through the notch 79 of the shell 15, the tabs 41, It is configured to be able to move 45.

Further, the tab 41 has a rib 412 below the main body 411, and the tab 41
45 has a groove 452 that can be fitted to the tab 41 above the main body 451,
The tabs 41 and 45 are configured to fit together and be integrated.

By adopting such a configuration, the user can obtain the eighth
Four types of opening state changes shown in FIGS. 17 to 17 can be performed.

In addition, one of the tabs 41, 45 is fixed or omitted, and is used as identification information at the time of manufacture. On the other hand, the tab 41, which is particularly arranged at the overlapping portion of the openings 21, 25, is movable, and this is recordable or unrecordable. It may be used for identification.

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

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

<Effect> According to the present invention, the identification information is extended by one bit or more,
The drive can be informed of identification information of optical discs of different standards and types.

Moreover, the cartridge does not need to have a special structure, and the drive device does not require a complicated mechanism. At this time, since the conventional write protect hole can be used as it is, if this is standardized, the discrimination between recordable and non-recordable is the same, and new information is added in combination with the information from the newly added sensor. A cartridge-type disc with extremely high compatibility between devices is realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state when the cartridge type optical disk of the present invention is viewed from the clamp side. FIG. 2 is a perspective view showing a state when FIG. 1 is viewed from the front side. FIGS. 3 to 6 are partially enlarged transverse sectional views showing different examples of the cartridge type optical disk and the optical disk identification method of the present invention. FIG. 7 is a partially enlarged transverse 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 disk of the present invention. 9 is a sectional view taken along line IX-IX of FIG. 8, and FIGS. 10 and 11 are sectional views taken along line XX and XI-XI of FIG. 9, respectively. 12, 14, and 16 are partial longitudinal sectional views corresponding to the section taken along line XX of FIG. 9 for explaining the operation of the cartridge-type optical disc of FIG. FIG. 13, FIG. 15 and FIG. 17 are respectively FIG. 12 and FIG.
14 is a partial cross-sectional view corresponding to the cross section taken along the line XI-XI in FIG. 9 and FIG. FIG. 18 is a partially enlarged transverse sectional view showing a conventional cartridge type magnetic floppy disk. Description of symbols 1 ... cartridge 11 ... upper shell 15 ... lower shell 21, 25 ... opening 3 ... through hole 4, 40, 41, 45 ... tabs 411, 451 ... body 412, 453 ... Rib 452: Groove 415, 455: Rib 416: Claw 417: Arm 418, 458: Hole 5: Optical disk 6: Shutter 71, 72: Guide groove 75: Through holes 76, 77 , 78… Locking part 79… Notch part 81, 85… Optical sensor 9… Light source

Continuation of the front page (56) References JP-A-61-965 (JP, A) JP-A-63-6585 (JP, U) JP-A-63-62964 (JP, U)

Claims (6)

(57) [Claims] 1. A cartridge for storing an optical disk, comprising a first opening on one main surface and a second opening larger than the other main surface, wherein the first and second openings are provided. An optical disc cartridge, wherein a tab for covering a part or all of a through hole between the tabs is fixed. 2. A cartridge for storing an optical disk, wherein said cartridge has a first opening on one main surface and a second opening larger than the other main surface. An optical disc cartridge, wherein two or more tabs are movably provided in a through hole between them, and the movement of the tab changes a shielding state of the through hole. 3. By changing the state of shielding by the tab, four or more types of identification information can be given, and four or more types of identification information can be obtained by detecting the state of shielding by a sensor provided in a drive device. An optical disk cartridge according to claim 1 or 2. 4. The sensor according to claim 1, wherein the sensor is at least two mechanical sensors or optical sensors, and the shielding state of the through hole depends on the depth of penetration of the mechanical sensor into the through hole. 4. The optical disc cartridge according to claim 3, wherein the optical disc cartridge can be detected also by the intensity of light transmitted through the through hole of the dynamic sensor. 5. The method according to claim 1, wherein the optical disk housed in the cartridge is identified by a drive device.
Using any one of the optical disc cartridges described above, changing the shielding state of the through hole to give four or more types of identification information, detecting the shielding state with a sensor provided in the drive device, and providing four or more types of identification information. Method of identifying optical disks to be obtained 6. A cartridge type optical disk, wherein the cartridges according to any one of (1) to (4), which are different from each other in at least four types of the shielded state, are stored in a predetermined cartridge for each type of optical disk. Manufacturing method.