JP3988352B2 - Disk cartridge and drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge and a drive device, and more particularly to a film surface incidence type disk cartridge, which can immediately determine compatibility with the drive device by a positioning hole, and the disk cartridge. The present invention relates to a drive device for reading and writing information.
[0002]
[Prior art]
A disk cartridge such as MO is configured by housing a disk as an information recording medium in a case. Due to the diversification of discs, disc cartridges often contain different types of discs in the same outer case. When inserted into an incompatible drive device, the disc cartridge is accessed by inappropriate recording / playback conditions. There is a risk of data corruption. Therefore, as a means for preventing erroneous insertion into the drive device or as a means for discriminating disc differences in the case of incorrect insertion, a part of the cartridge case is compatible with a guide mechanism on the drive device side. A specific shape portion for discriminating the disc is provided according to the type of the disc.
[0003]
FIG. 2 is a plan view showing a part of a conventional ISO standard disc cartridge. As shown in FIG. 2, for example, in a disc cartridge such as HS or Zip, a notch (8) is provided at the bottom of the side surface. Further, in a 90 mm magneto-optical disk cartridge, a notch is provided on the shutter opening / closing surface, and a corner of the case is chamfered.
[0004]
Recently, as a new disk applied to a disk cartridge, a film surface incidence method has been studied in which an optical head is positioned on the recording surface side and the recording layer is directly irradiated with light for reading and writing. In the film surface incidence method, since the aberration of the light spot due to the substrate thickness error and the tilt error of the disk substrate surface with respect to the optical head does not increase so much, the numerical aperture of the objective lens of the optical head can be designed large, and the light spot can be further increased. Can be small. As a result, the recording capacity can be further increased, and the reading / writing speed can be further increased.
[0005]
[Problems to be solved by the invention]
By the way, in order to use a new disk as described above in the disk cartridge, in order to prevent damage to the disk and the drive apparatus, as described above, the insertion restricting means for the incompatible drive apparatus or the optical head in the incompatible drive apparatus. It is necessary to newly provide access control means. However, in order to newly consider the shape part for discrimination and design a dedicated case, a great amount of cost is required for manufacturing the mold. Moreover, it is necessary to newly design the internal structure of the drive device.
[0006]
Of course, the compatibility of the disk cartridge with the drive device can be determined by whether or not the recorded information can be read out by directly accessing the disk. However, a conventional substrate surface incidence type disk is used in the film surface incidence type drive device. If it is inserted by mistake, there is a risk of causing the optical head to collide with the substrate surface of the disk before reading the recorded information because of the difference between the working distance and the focal position of the lens during focus control.
[0007]
The present invention has been made in view of the above circumstances, and the object thereof is a film surface incidence type disk cartridge, in which a case is provided with a discriminating means capable of immediately discriminating suitability for a drive device, and It is an object of the present invention to provide a disc cartridge in which the discriminating means can be easily constructed without significantly changing the design of the conventional case shape, and a drive device for reading and writing information on the disc cartridge.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the disc cartridge of the present invention has a positioning hole for accommodating a disc as an information recording medium in a case conforming to ISO standard ISO / IEC10089 and fitting a positioning pin of a drive device. In the disk cartridge provided in the case, the disk is a film surface incidence type optical disk, and the positioning hole has a film surface incidence method having a larger outer diameter than a positioning pin compliant with ISO standard ISO / IEC10089 It is a hole into which a positioning pin of a film surface incidence type drive device arranged at a position different from a positioning pin of the drive device or a positioning pin compliant with ISO standard ISO / IEC10089 is fitted.
[0009]
That is, in the above disk cartridge, the positioning hole is a hole into which the positioning pin of the film surface incidence type drive device arranged in a different size or at a different position from the positioning pin conforming to a specific ISO standard is fitted. The disc cartridge of the invention can access the disc only when inserted in a suitable film surface incidence type drive device.
[0010]
In a preferred embodiment of the disk cartridge for expressing the positioning hole discrimination function, the positioning hole is a square or substantially circular hole, and the length or diameter (L1) of the short side is 1 mm or more. The length or diameter (L1) of the short side of the case is 1/10 or less of the length of one side of the case, and the short side length or diameter (L1) is the length of the short side of the positioning hole in the disc cartridge conforming to ISO / IEC10089 of ISO The diameter (L2) has a relationship of 0.5 mm ≦ L1−L2 ≦ 4.0 mm.
[0011]
Furthermore, in another preferable aspect of the disk cartridge, the positioning hole is a square or substantially circular hole, and the length or diameter (L1) of the short side thereof is 1 mm or more and the length of one side of the case. 1/10 or less, and the center position of the positioning hole may be shifted by 0.5 to 4.0 mm from the center position of the positioning hole in the disc cartridge in conformity with ISO standard ISO / IEC10089 .
[0012]
The drive device of the present invention is a drive device that reads and writes information from and to the disk cartridge of each of the above aspects, and includes a positioning pin that fits into the positioning hole of the disk cartridge, and the positioning pin is The optical head is accessed only to the fitted disc cartridge.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a disk cartridge according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a main configuration of a disk cartridge according to the present invention. As shown in FIG. 1, the external appearance of the disk cartridge of the present invention is substantially the same as that of a conventional portable cartridge, and the disk (2) as an information recording medium is accommodated in a flat box-shaped case (1). Configured.
[0014]
The case (1) is configured by combining an upper case member and a lower case member that are integrally formed by injection molding of polycarbonate resin, ABS resin, polypropylene resin, or the like. The case (1) is provided with an access window (3) that exposes the disk (2) for reading and writing information. The access window (3) is a shutter (4) that is urged in a direction to be always closed by a spring. ). The shutter (4) is opened at the time of insertion by a guide mechanism of a drive device (information recording / reproducing device).
[0015]
In the present invention, a film surface incidence type optical information recording medium (optical disk) is used as the disk (2). The film surface incidence type disk (2) is formed by forming a recording layer on one side or both sides of a resin substrate such as a polycarbonate resin, a polyethylene resin, a polyolefin resin, a norbornene resin, or a polymethyl methacrylate resin. In addition, this is a disc of a type in which a lens / coil integrated optical head is positioned on the recording surface side, and reading and writing are performed by direct light irradiation from the recording layer side.
[0016]
The outer diameter of the disk (2) is set based on a conventional standard such as 5 inches or 3.5 inches. That is, the disk (2) is a 130 mm disk (ISO standard; ISO / IEC10089), a 90 mm disk (ISO / IEC10090) or the like according to the ISO standard. In addition, a hub (5) for chucking in the drive device is provided at the center of the disk (2), similarly to the conventional substrate surface incidence type disk.
[0017]
In the disc cartridge of the present invention, the case (1) is provided with a positioning hole (6) for fitting a positioning pin of the drive device when inserted into the drive device, as in the conventional disc cartridge. The positioning hole (6) is provided to maintain a relative positional relationship with respect to a chuck mechanism or the like in the drive device when inserted into the drive device. Although the positioning hole (6) may be one, in order to improve positioning accuracy, a pair of positioning holes, a location hole (6a) and an alignment hole (6b), are provided as in the conventional disk cartridge. In the case of the double-sided recording type, these location holes (6a) and alignment holes (6b) are provided on the 0th surface side and the 1st surface side of the case (1), respectively.
[0018]
The positioning hole (6) is formed in such a size that the positioning pin of the corresponding drive device can be accurately fitted in order to accurately position the disk cartridge. A feature of the present invention resides in that the compatibility with the drive device is determined using the positioning hole (6). That is, in the disk cartridge of the present invention, the positioning hole (6) is provided with a function for allowing the drive device to determine the suitability of the disk (2) by the fitting relationship with the positioning pin of the drive device.
[0019]
Specifically, the positioning hole (6) having the above discrimination function is fitted to a positioning pin having an outer diameter larger than that of an ISO standard positioning pin provided in a conventional drive device such as a substrate surface incidence method. There are two modes: a positioning hole that fits into a positioning pin that is disposed at a position different from the ISO standard positioning pin provided in a conventional drive device.
[0020]
Referring to FIG. 1 and FIG. 2, in the first aspect, the positioning hole (6) is a square or substantially circular hole, and the length or diameter (L1) of the short side thereof is 1 mm or more. In addition, the length of the short side or the diameter (L1) is 1/10 or less of the length of one side (one side in the short direction) of the case (1). It has the relationship of 0.5 mm <= L1-L2 <= 4.0mm with respect to the length or diameter (L2) of the short side of the positioning hole (9).
[0021]
That is, the location hole (6a) as the reference hole is formed as, for example, a square hole, and the length (L1) of one side thereof is 1 mm or more and 1/10 or less of the length of one side of the case (1). In addition, in relation to the length (L2) of one side of the conventional location hole (9a), 0.5 mm ≦ L1−L2 ≦ 4.0 mm is formed. The short side of the alignment hole (6b) is set to a length (L1) equivalent to the one side of the location hole (6a).
[0022]
For example, in the disc cartridge according to the present invention conforming to the ISO standard 130 mm disc, the length (L1) of one side of the location hole (6a) and the short side of the alignment hole (6b) is set to the positioning hole (9) of the conventional disc cartridge. ) Is preferably 4.5 mm or more and 8 mm or less, while the length (L2) of one side is 4 mm, for example, it is enlarged to 5 mm. Further, only one of the location hole (6a) or the alignment hole (6b) may be enlarged.
[0023]
The reason for setting the size of the positioning hole (6) as described above is as follows. That is, when the length or diameter (L1) of the short side of the positioning hole (6) is 1 mm or less, it is difficult to ensure the required dimensional accuracy in resin molding, and the one side of the case (1) When the length is 1/10 or more, the opening area of the positioning hole (6) occupying the surface of the case (1) becomes too large. Furthermore, taking into account the dimensional tolerance allowed in such resin molding is about ± 0.1 mm, as well as manufacturing variations and the positioning accuracy of the positioning pins on the drive device side, it is definitely distinguished from the conventional standard. The possible dimensional difference is preferably 0.5 mm or more. If the dimensional difference is larger than 4.0 mm, the opening area becomes too large as described above.
[0024]
The case (1) is manufactured by injection molding as described above, and the mold used at that time is assembled with mold parts called “nesting” corresponding to each shape part to the mold body. Configured. Accordingly, in the disk cartridge of the present invention, the positioning hole (6) as described above, which is larger than the conventional size, can be easily formed by simply replacing the mold parts corresponding to the location hole (6a) and the alignment hole (6b). it can.
[0025]
1 and 2, in the second embodiment, the positioning hole (6) is a square or substantially circular hole, and the length or diameter (L1) of the short side thereof is 1 mm or more and 1/10 or less of the length of one side (one side in the short direction) of the case (1), and the center position of the positioning hole (6) is the same in other disc cartridges of different disc types. There is a deviation of 0.5 to 4.0 mm from the center position of the positioning hole (9).
[0026]
That is, the location hole (6a) which is the reference hole is formed as a square hole similar to that in the first embodiment, and for the same reason as described above, one side of the location hole (6a) and the alignment hole (6b) ) Is set to 1 mm or more and 1/10 or less of the length of one side of the case (1). Moreover, the location hole (6a) and the alignment hole (6b) are formed at positions shifted by 0.5 to 4.0 mm, respectively, as compared with the conventional disk cartridge.
[0027]
For example, in the disc cartridge of the present invention conforming to the ISO standard 130 mm disc, the distance (M1) between the center of the location hole (6a) and the alignment hole (6b) is the same as the location hole (9a) and the alignment hole of the conventional disc cartridge. The center-to-center distance (M2) in (9b) is preferably 122 mm or more and 121.5 mm or less, whereas it is preferably reduced to 120 mm, for example. In other words, the location hole (6a) and the alignment hole (6b) are formed closer to the center by 1 mm.
[0028]
Of course, the positioning hole (6) may be formed so that only one of the location hole (6a) or the alignment hole (6b) is deviated from the positioning hole (9) of the conventional standard, and the case ( 1) The surface may be deviated in any direction of up and down or left and right. The reason for setting the position of the positioning hole (6) as described above is caused by the dimensional tolerance allowed in the resin molding, the manufacturing variation, and the positioning accuracy of the positioning pin on the drive device side, as described above. .
[0029]
In the disc cartridge of the present invention, the positioning hole (6) as described above at a position different from the conventional position is a mold corresponding to the location hole (6a) and the alignment hole (6b), as in the above-described embodiment. It can be easily formed simply by changing the mounting position of the parts. In the disc cartridge of the present invention, the positioning hole (6) may be a combination of the first aspect and the second aspect.
[0030]
On the other hand, the drive device of the present invention is a drive device for reading / writing information from / to the film surface incidence type disk cartridge of each of the above aspects, and includes a positioning pin that fits into the positioning hole (6) of the disk cartridge. In addition, the optical head is accessed only to the disk cartridge fitted with the positioning pin. The drive device described above is a disk cartridge, except that it includes a lens / coil integrated optical head that is positioned on the recording surface side and directly irradiates light on the recording layer side as described above, and the necessary firmware. A guide mechanism, a chuck mechanism, a rotation mechanism, and the like for loading and unloading are configured in the same manner as a conventional information recording / reproducing apparatus.
[0031]
In the drive device described above, the positioning pin can be formed in an appropriate cross-sectional shape as long as it can be accurately fitted into the positioning hole (6) of the disk cartridge, but is usually formed in a circular cross-section. For example, the film surface incidence type disc cartridge conforming to the ISO standard 130 mm disc, and the information is read from and written to the disc cartridge in which the positioning hole (6) is formed larger than the conventional standard as described above. In the drive device, the diameter of the conventional positioning pin is increased to 5 mm compared to 4 mm.
[0032]
Similarly, in the film surface incidence type disc cartridge according to the ISO standard, the distance (M1) between the centers of the positioning holes (6) is short, and the location hole (6a) and the alignment hole (6b) are as described above. Thus, in a drive device that reads and writes information on a disk cartridge formed closer to the center than the conventional standard, the distance between centers of the conventional positioning pins is 122 mm, but is reduced to 120 mm. Since the positioning pin is usually mounted in the drive device as an independent part, it is very easy to change the diameter and the arrangement of the positioning pin as described above.
[0033]
In the disc cartridge and the drive device of the present invention, the following effects can be achieved by the discrimination function of the positioning hole (6). In other words, the disc cartridge of the present invention has a large positioning hole (6) that fits into a positioning pin having an outer diameter larger than that of the ISO standard positioning pin if it is erroneously inserted into the substrate surface incidence type drive device. Since it is provided and cannot be positioned accurately, it cannot be chucked, or even if it can be chucked, information on the disk (2) cannot be read. Therefore, it can be ejected according to the handling of a defective disk. Further, in the substrate surface incidence type drive device, since the distance of the optical head when accessing the disk is relatively long, there is no danger of contacting the optical head with the disk (2).
[0034]
On the other hand, in the film surface incidence type drive device of the present invention, the diameter of the positioning pin is increased as described above, or the distance between the centers of the positioning pins is reduced as described above. Therefore, even if a conventional disk surface incidence type disk cartridge is accidentally inserted into the film surface incidence type drive device, it cannot be mounted at the specified position because the positioning pin does not engage with the positioning hole (9). . If a disk cartridge cannot be mounted, a mounting failure can be detected by a disk mounting detector (a sensor for detecting the presence or absence of a disk), so that it can be ejected from the drive device or access to the optical head can be restricted.
[0035]
That is, in the disk cartridge of the present invention, the positioning hole (6) having a specific function can be adapted to the disk (2) depending on whether or not the positioning pin is fitted when inserted into the drive apparatus. Therefore, the disc cartridge of the present invention can access the disc (2) only when it is inserted into a suitable film surface incidence type drive device. In other words, the disc cartridge of the present invention can immediately determine the suitability for the drive device by the positioning hole (6), and the positioning as the determining means without significantly changing the design of the conventional case (1). The hole (6) can be configured easily.
[0036]
The drive device of the present invention includes a positioning pin that fits into the specific positioning hole (6), and accesses the optical head only to the disk cartridge in which the positioning pin is fitted. In other words, the optical head is brought close to only a suitable film surface incidence type disc cartridge, and the optical head is operated for different types of disc cartridges such as a substrate surface incidence type rewritable optical disc and WORM type optical disc. Therefore, the collision between the disk and the optical head can be reliably prevented. In addition, the drive device of the present invention can be configured only by changing the specification of the positioning pin, and the design change from the previous device is extremely easy.
[0037]
【The invention's effect】
According to the disk cartridge of the present invention, the compatibility with the drive device can be immediately determined by the positioning hole having a specific function, and the positioning hole as the determining means can be formed without significantly changing the design of the conventional case shape. Easy to configure. Further, according to the drive device of the present invention, since the positioning pin that fits into the specific positioning hole is provided and the optical head is not operated with respect to the disk cartridge of a different disk type, The collision of the optical head can be surely prevented, and it can be configured only by changing the specification of the positioning pin, and the design change from the previous apparatus is extremely easy.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main configuration of a disk cartridge according to the present invention. FIG. 2 is a plan view showing a part of a conventional ISO standard disk cartridge.
1: Case 2: Disc 6: Positioning hole 6a: Location hole 6b: Alignment hole 9: Positioning hole 9a: Location hole 9b: Alignment hole L1: Length of short side or diameter of positioning hole L2: Short side of positioning hole Length or diameter M1: Distance between centers of positioning holes M2: Distance between centers of positioning holes

Claims (6)

The case (1) is provided with a positioning hole (6) for accommodating a disc (2) as an information recording medium in a case (1) conforming to ISO standard ISO / IEC10089 and fitting a positioning pin of the drive device. In the obtained disc cartridge, the disc (2) is a film surface incidence type optical disc, and the positioning hole (6) is incident on the film surface having a larger outer diameter than the positioning pin compliant with ISO standard ISO / IEC10089. A disc cartridge characterized by being a hole into which a positioning pin of a film surface incidence type drive device arranged at a position different from a positioning pin of a system drive device or a positioning pin compliant with ISO standard ISO / IEC10089 . The positioning hole (6) is a square or substantially circular hole, and the length or diameter (L1) of the short side thereof is 1 mm or more and 1/10 or less of the length of one side of the case (1), Moreover, the length or diameter (L1) of the short side is 0.5 mm ≦ L1 with respect to the length or diameter (L2) of the short side of the positioning hole (9) in the disc cartridge conforming to ISO standard ISO / IEC10089. The disk cartridge according to claim 1, wherein a relationship of −L2 ≦ 4.0 mm is satisfied. The positioning hole (6) is a square or substantially circular hole, and the length or diameter (L1) of the short side thereof is 1 mm or more and 1/10 or less of the length of one side of the case (1), Moreover, the center position of the positioning hole (6) is shifted by 0.5 to 4.0 mm from the center position of the positioning hole (9) in the disc cartridge in accordance with ISO standard ISO / IEC10089. Disc cartridge. The diameter of the disk (2) is about 130 mm, the positioning hole (6) is a square hole, and the short side length (L1) of the positioning hole (6) is 4.5 mm or more and 8.0 mm. The disc cartridge according to any one of claims 1 to 3 , wherein: A diameter of about 130mm disk (2), according to any of claims 1-4 center distance (M1) is below and 121.5mm least 114mm of two positioning holes (6a) and (6b) Disc cartridge. A drive device for reading and writing information from and to the disk cartridge according to any one of claims 1 to 5 , comprising a positioning pin that fits into a positioning hole (6) of the disk cartridge, wherein the positioning pin is A drive apparatus characterized in that an optical head is accessed only to a fitted disk cartridge.

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