KR100750098B1 - A disk cartridge - Google Patents

Abstract

Disclosed is a disk cartridge having a selection reflecting unit for reflecting light incident from the outside to a selected position, so that the disk drive apparatus can detect the reflected light to identify the type of disk. According to such a configuration, it is possible to provide a plurality of identification marks that can identify the type of disc with a change in the reflection position with respect to incident light, so that not only the capacity of the disc but also various kinds of products such as the type of the product and the type of the disc format. You can identify all disk types.

Description

Disk cartridge {A disk cartridge}

1 shows a disc cartridge having a conventional disc identification mechanism;

2 and 3 show a disk cartridge and a disk drive apparatus according to a first embodiment of the present invention;

4 to 7 show examples of the use of the disc cartridge shown in FIG.

8 and 9 are views showing a modification of the arrangement of the selective reflection unit in the disc cartridge shown in FIG.

10 to 13 illustrate a disc cartridge and a use example thereof according to the second embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10 ... disc cartridge 11 ... case

15 ... Incident 16a, 16b ... Reflector

17 ... Opening board 18 ... Reflective part

100 ... disk drive unit 120 ... photodetector

121,122 ... 1,2 photodetector 123 ... LED

The present invention relates to a disc cartridge for storing a disc which is an information recording / reproducing medium, and more particularly to a disc cartridge having an improved identification mechanism for identifying the type of disc.

Recently, a disc cartridge which rotatably houses a recording / reproducing medium on a disc such as an optical disc or a magneto-optical disc to be used in a disc drive is widely used as a recording medium for multimedia such as video and audio.

In addition, with the development of multimedia, various types of disc cartridges have been introduced to increase the recording density while increasing the capacity of the disc cartridges. For example, in the case of a DVD-RAM, a general single-side disc type for recording information on only one side of the disc, a double-sided disc type for recording information on both sides, and a recording layer on one side are formed in duplicate for each layer. There are various types of disc cartridges with different recording densities, such as a single-sided double recording layer type for recording information, a double-sided double recording layer type that applies it to both sides, and even the same single-sided disc type with a narrower track pitch. It is spreading.

However, when such recording density is changed, the recording and reproducing method by the disc drive device is also different. That is, the method of recording and reproducing information in the disc drive apparatus varies depending on how the track pitch is configured in the disc, whether the recording layer is a single layer or a double layer. Therefore, there is a need for a structure that allows the disc cartridge to be identified when it is mounted in the disc drive.                         

Conventionally, as the structure for identifying such various disk types, the structure as shown in FIG. 1 has been disclosed through Japanese Patent Laid-Open No. 11-120733. Referring to the figure, an identification magnet 5 for representing a high capacity disk is provided in the disk cartridge 1 in which the disk 2 is rotatably stored in the case 3. In the disk drive device 6, a magnetic sensor 7 for detecting the magnet 5 is provided. Therefore, when the disc cartridge 1 is mounted in the disc drive device 6, the magnetic sensor 7 detects the magnetic force of the magnet 5 to determine that the disc cartridge 1 is of high capacity, and the result is disc drive. It transmits to a controller (not shown) of the device 6 to allow control according to the type of the disc cartridge. On the other hand, in the case of a low capacity disk cartridge, the above-mentioned identification magnet 5 is not provided. In this case, since the magnetic force is not detected by the magnetic sensor 7 even when the disc cartridge is mounted, it is determined therefrom that the disc cartridge currently mounted is a low capacity disc cartridge.

By the way, such a conventional method identifies the type of the disc cartridge by turning on / off the magnetic sensor 7 with or without the magnet 5, and thus, for example, distinguishes two types of high capacity and low capacity. Do. Therefore, in order to distinguish the various types of disk cartridges as described above with this structure, the number of magnets varies according to the type of disk cartridges, and the magnetic sensor 7 also has several enough to detect the maximum number of magnets. The magnetic sensor 7 is determined by the number on which the magnetic sensor 7 is turned on, or magnets having different magnetic strengths are installed according to the type of the disc cartridge, and the magnetic sensor 7 also has simple on / off. Rather, it must be composed of precise circuits that can distinguish the strength of each magnetic force.

However, increasing the number of installations of magnets and magnetic sensors not only impedes the miniaturization and weight reduction of the disk drive device, but also lowers the manufacturing cost and productivity, and differentiating the strength of the magnetic force also requires the burden of constructing a precise circuit. In addition, there is a risk that the type of disc cartridge will be misjudged if the magnetic force of the magnet deteriorates. Therefore, there is a demand for a disc cartridge of a new structure having a simpler structure and capable of identifying various types of disc cartridges.

SUMMARY OF THE INVENTION The present invention has been made in view of the above necessity, and an object thereof is to provide an improved disk cartridge capable of identifying various types of disk cartridges with a simple structure.

In order to achieve the above object, the present invention provides a disc cartridge for storing a disc in a case, by selectively blocking a reflection path of light incident from a predetermined light emitting portion and changing the reflection position thereof, according to the difference in the reflection position. Characterized in that the selection reflecting unit for identifying the type of the stored disc.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 7 show a disc cartridge according to the first embodiment of the present invention.                     

First, as shown in FIG. 2, the disc cartridge 10 of the present embodiment houses the disc D as an information recording and reproducing medium in a case 11 whose one surface is opened and closed by the opening cover 13. In addition, as a means for identifying the type of the stored disk (D), the reflection path of the light incident from the external light emitting unit 123 (see FIG. 4) provided in the photodetector 120 of the disk drive apparatus 100. It is provided with a selection reflecting unit for selectively changing the. The selection reflecting unit is formed in each of the reflecting unit 18 provided on one surface of the opening cover 13 and the case 11 so that external light is incident on the reflecting unit 18 and then reflected. Opening and closing plate 17 for selectively blocking the reflection path of the light while opening and closing the entrance hole 15, the first and second reflection holes 16a and 16b, and the first and second reflection holes 16a and 16b. Include. Therefore, after the light emitted from the light emitting unit 123 is incident on the reflecting unit 18 through the incident hole 15, the case 11 is again provided through the first and second reflecting holes 16a and 16b. The opening and closing plate 17 selectively opens and closes the first and second reflecting holes 16a and 16b and changes the reflection path thereof. Since the position where the light is reflected is changed according to the position of the opening and closing plate 17, when detecting the difference through the light receiving units 121 and 122 of the photodetector 120, it is used as a signal for identifying the type of the disc. It is intended to take advantage of what is possible. The detailed mechanism will be described later. The reflector 18 may be made of a material that easily reflects light, such as glass or aluminum foil. Reference numeral 14 denotes a positioning hole into which the positioning pin 114 of the disk drive apparatus 100 is inserted, and reference numeral 19 denotes an opening hole 11a formed for access of the pickup 113 to the disk D. Indicates a shutter for opening and closing.

Such a disk cartridge 10 is seated in the tray 130 as shown in Figure 3 is inserted into the disk drive device 100. The disk drive device 100 is provided with a rotating chassis 110 which is rotated in the directions of arrows A and B by a predetermined cam mechanism (not shown), and the turntable on which the disk D is seated on the rotating chassis 110. And a recording / reproducing unit including a 112, a spindle motor 111 for rotating the turntable 112, a pickup 113 for recording and reproducing information on the disc 12, and the reflecting unit 18. The photodetector 120 is provided for irradiating light and detecting the reflected light to identify the type of the disc D. The rotating chassis 110 is lowered in the direction of arrow A when the tray 130 comes out as shown in the drawing, and ascends in the direction of arrow B when the tray 130 is moved inward, and the disk D of the disk cartridge 10 is It is seated on the turntable 112 and the positioning pin 114 is also fitted in the positioning hole (14). Reference numeral 140 denotes an opening lever installed on the inner surface of the lid 160 to open the shutter 19 when the disc cartridge 10 enters, and reference numeral 150 denotes a disc D mounted on the turntable 112. Represents a clamper for clamping to a state.

Here, the photodetector 120 is positioned below the reflector 18 when the disk cartridge 10 is mounted to the disk drive apparatus 100 as shown in FIGS. 4 to 6, and emits light as a light emitting unit. LED 123 and the first and second photo detectors 121 and 122 serving as light receiving units. The first and second photodetectors 121 and 122 are sensors for sensing the light reflected through the first and second reflectors 16a and 16b, respectively, and the detected results are determined according to the amount of light received. Output as 2 minutes of ON / OFF.

The disc identification operation using the selective reflection unit and the photodetector 120 proceeds as follows. First, when the disc cartridge 10 is inserted into the disc drive device 100 by taking the tray 130, the rotating chassis 110 is raised in the direction of the arrow B to seat the disc D on the turntable 112. . At this time, the photodetector 120 is located below the selection reflecting unit. In this state, when the LED 123 irradiates light to the reflector 18 through the incident hole 15 of the case 11, the light reflected from the reflector 18 is first and second. The reflection holes 16a and 16b are reflected to the first and second photo detectors 121 and 122. In this case, if the opening and closing plate 17 blocks the first reflecting hole 16a as shown in FIG. 4, the light reflected by the reflecting unit 18 is only emitted through the second reflecting hole 16b. Only the second photodetector 122 receives light. However, since the light is blocked by the opening / closing plate 17 through the first reflecting hole 16a, the reflected light is not received by the first photodetector 121. In this case, an “off” signal is generated at the first photodetector 121 and an “on” signal is generated at the second photodetector 122, whereby the disk drive apparatus 100 is currently equipped with a disc cartridge. It is recognized that 10 has housed a disk of type A having a selection reflecting unit as an identification mark that blocks the first reflecting hole 16a.

Next, in the case of the disc cartridge in which the opening and closing plate 17 blocks the second reflecting hole 16b as shown in FIG. 5, after the light irradiated from the LED 123 is reflected by the reflecting unit 18, Only the first photodetector 121 is received through the first reflecting hole 16a. Therefore, the opposite output result is shown, which means that the mounted disc cartridge 10 contains a disc of type B having the selection reflecting unit blocked by the second reflector 16b as an identification mark. Done.

In addition, as shown in FIG. 6, the case where the opening-closing board 17 opens all the 1st, 2nd reflecting holes 16a and 16b, and the case where it blocks | blocks all like FIG. First, in FIG. 6, the light reflected by the reflector 18 through the opened first and second reflectors 16a and 16b is received by the first and second photodetectors 121 and 122. . Accordingly, both the first and second photodetectors 121 and 122 output an "on" signal, so that the disk reflector 10 identifies the selective reflection unit in which the first and second reflectors 16a and 16b are opened. This indicates that the C type disk provided with the mark is stored. In the case of Fig. 7, all of the first and second reflectors 16a and 16b are blocked, so that both the first and second photodetectors 121 and 122 output an "off" signal, The disc cartridge is stored.

Accordingly, when the reflective holes 16a and 16b are selectively opened and closed and the path of the reflected light is changed, the result values detected by the photodetector 120 are output differently. In this case, it is possible to sufficiently perform the role of an identification mark for distinguishing various disc types. In the present embodiment, for convenience of description, the four reflective cases 16a and 16b and the two photo detectors 121 and 122 are used to create four different cases as described above. Increasing this number can, of course, create more cases. For example, as shown in FIG. 8, four reflective holes 16a, 16b, 16c, and 16d are formed with respect to the incident hole 15, and then the photodetector is corresponded to each of the opening and closing plates 17. By operating, you can create more cases. Further, even in the same four cases, even if the arrangement is as shown in Fig. 9, the photodetector may be provided so as to correspond to it.

In addition, if the difference in the depth of the reflecting portion 18, that is, the distance from the light emitting portion 123 can be made more and more cases. That is, even when the light receiving state by the selection reflecting unit is the same, when the depth of the surface provided with the reflector 18 is deeper, the light path is relatively longer, so that the light is received by the photodetectors 121 and 122. There is a difference in the amount of light. Therefore, if the output value of the photodetector 120 is not a bipartite on / off signal only, but the output value of several stages is displayed according to the amount of light received, this alone can identify another type of disc. Therefore, only a change in the amount of reflected light can serve as an identification mark for distinguishing the type of the disc, and in particular, when combined with the selective reflection unit, the number of output values can be greatly increased without adding a separate device. Therefore, various kinds of discs can be sufficiently covered.

On the other hand, in the present embodiment, assuming that the disk (D) of the disk cartridge 10 can use both sides, the case where the selection reflecting unit is provided in the upper and lower parts of the case 11 is illustrated. Therefore, even if the disc cartridge 10 is inserted upside down, the same detection operation can be received by the photodetector 120.                     

10 to 13 show a disc cartridge according to a second embodiment of the present invention. In the drawings, the same reference numerals are given to the same members as those in the first embodiment.

This embodiment is substantially the same as the configuration of the first embodiment, except that the reflecting portion 18 is provided on the inner wall of the side surface of the case 11 of the disc cartridge 10, and accordingly, the photodetector 120 also has a disc drive device. The point provided in the side wall of 100 is different.

In the above configuration, when the opening and closing plate 17 blocks the first reflecting hole 16a as shown in FIG. 10, the light irradiated from the LED 123 to the reflecting unit 18 causes the second reflecting hole 16b. It passes through and is detected only in the second photodetector 122. In this case, an “off” signal is generated at the first photodetector 121 and an “on” signal is generated at the second photodetector 122, whereby the disk drive apparatus 100 is currently equipped with a disc cartridge. It is recognized that 10 has housed a disk of type A having a selection reflecting unit as an identification mark that blocks the first reflecting hole 16a.

Next, when the opening and closing plate 17 blocks the second reflector 16b as shown in FIG. 11, the light irradiated from the LED 123 is reflected by the reflector 18, and then the first Only the first photodetector 121 is received through the reflective hole 16a. Therefore, the opposite output result is shown, which means that the mounted disc cartridge 10 contains a disc of type B having the selection reflecting unit blocked by the second reflector 16b as an identification mark. Done.

In addition, when the opening and closing plate 17 opens all of the first and second reflecting holes 16a and 16b as shown in FIG. 12, the reflecting unit is opened through the opened first and second reflecting holes 16a and 16b. The light reflected by 18 is received by both the first and second photodetectors 121 and 122. Accordingly, both the first and second photodetectors 121 and 122 output an "on" signal, so that the disk reflector 10 identifies the selective reflection unit in which the first and second reflectors 16a and 16b are opened. This indicates that the C type disk provided with the mark is stored.

In the case of Fig. 13, since the first and second reflecting holes 16a and 16b are all blocked, the first and second photodetectors 121 and 122 both output an " off " The disc cartridge is stored.

Also, by varying the amount of light received by varying the depth of installation of the reflector 18, it is possible to produce a large number of cases that can sufficiently cover various disc types without adding a special device.

Therefore, the disc cartridge according to the present invention can provide many cases in which various types of discs can be identified by a simple structure of detecting the reflected light of the reflecting portion provided in the disc cartridge with a photodetector. Therefore, not only the capacity of the disc but also various types of discs such as the type of the product and the type of the disc format can be identified.

As described above, the disc cartridge and the disc drive apparatus of the present invention can provide a large number of identification marks that can identify the type of disc while irradiating light to the reflecting portion provided in the disc cartridge and selectively varying its reflection path. In addition, the simple structure of detecting the reflected light with the photodetector has the advantage of being able to sufficiently identify the type of the disk.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings and that many more modifications and variations are possible within the scope of the following claims.

Claims (5)

A disc cartridge for storing a disc in a case, And a selective reflection unit for selectively blocking the reflection path of the light incident from a predetermined light emitting part and changing the reflection position so that the type of the stored disc can be identified according to the difference in the reflection position. The selective reflection unit, A reflection unit provided inside the case; An incident hole formed in the case to allow light of the light emitting part to be incident on the reflecting part, and a plurality of reflection holes formed in the case so that light reflected therefrom can escape again; And an opening and closing plate for selectively opening and closing the plurality of reflection holes to change a reflection position of light incident on the reflection part. delete The method of claim 1, The incident hole and the reflective hole are formed on at least one surface of the upper and lower surfaces of the case, the reflecting portion is provided on the opening cover coupled to open and close to one surface of the case, characterized in that positioned to face the incident and reflective holes Disk cartridge. The method of claim 1, And the entrance hole and the reflection hole are formed on the side of the case, and the reflection part is provided on the inner wall of the case so as to face the reflection cartridge. The method according to any one of claims 1 and 3 to 4, The reflector is a disc cartridge, characterized in that the depth is formed differently so as to differ in the optical path reflected by the type of the disk.

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