JPH0547092A - Disk cartridge drive - Google Patents

Abstract

PURPOSE:To discriminate an insertion of a normal and irregular disk cartridges by providing a switch for disk cartridge width detection on a disk cartridge guide part. CONSTITUTION:On the disk cartridge guide part, two switches for disk cartridge width detection 301 and 302 are provided. When the prescribed width is detected, a disk cartridge to be inserted is judged to be regular. On the other hand, when the prescribed width is not detected, the disk cartridge to be inserted is judged to be irregular. Moreover, the same is true when the width is detected by combining a spring 306 and a switch 305, preventing the damage of a disk drive due to erroneous insertion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge drive for handling a disk cartridge, and more particularly to a means for preventing erroneous insertion in a front loading type disk cartridge drive.

[0002]

2. Description of the Related Art Generally, a flexible magnetic disk is used as a replaceable external storage means of a computer. As the magnetic disk, a standard disk having a diameter of 8 inches, a 5.25 inch mini disk and a 3.5 inch micro disk are currently used. Unlike other magnetic disks, the 3.5-inch micro disk is built in a rigid cartridge and can be used stably, and a 2ED can store a large amount of data of 4 MB. It is possible.

On the other hand, with the development of opto-electronic technology, optical discs in which information is written and read by an optical head such as a compact disc or a video disc have become widespread in recent years. Therefore, recently, these large-capacity optical disks have been attracting attention as exchangeable external storage devices for computers, and are gradually becoming popular. Of these optical disks, those with a 12 cm diameter and those with a 8 cm compact disk are called CD-ROMs, and although they are relatively small, they have a large storage capacity of about 540 MB for a 12 cm diameter disk and about 150 MB for an 8 cm compact disk. have.

Among these CD-ROMs, those having a diameter of 8 cm have a thickness of 1.2 mm, a central hole diameter of 15 mm, and a clamping area diameter for holding a disc of 26.0-3.
It is specified as 3.0 mm.

Since this 8 cm CD-ROM is very small and easy to store and carry, it may be damaged during carrying, handling or replacement. Therefore, like the 3.5-inch micro disk mentioned earlier, ABS
It is often used by being housed in a rigid cartridge made of resin or the like.

The shape of this compact disc cartridge is shown in FIGS. 3 (a) and 3 (b). 1A shows the front surface of the compact disc cartridge 1 and FIG. 1B shows the back surface thereof, and an arrow 5 indicating the insertion direction is provided on the front surface of the compact disc cartridge. The compact disc cartridge 1 shown in this figure has an outer dimension of 94 mm in length, 90 mm in width, and 5.6 mm in thickness. An 8 cm CD-ROM 2 is housed inside, and a shutter 3 that can be opened and closed is on the front and back. It is attached across both sides.

On the back surface of the compact disc cartridge shown in FIG. 1B, there are provided gripping slots 6 and 6, a positioning hole 7 and an alignment hole 8 which are used for grasping the compact disc cartridge and pulling it into the drive. ..

Further, a shutter opening / closing slot 9 is provided on the back side of the shutter 3, and when the compact disc cartridge is inserted into the compact disc cartridge drive, the shutter 3 is opened and the disc is held in this opening. A spindle and a clamper for driving are introduced. Information is written and read by the optical head through the opening.

The length and width of the compact disc cartridge 1 are 94 mm and 90 mm, respectively, as described above. Since the width is shorter than the length, it is impossible to insert the length direction and the width direction by mistake. is there. However, it is possible to insert it inside out and reverse it.

In order to prevent such erroneous insertion, an erroneous insertion identifying section 4 is provided on the right side of the front end in the insertion direction.
This is the hypotenuse of a right-angled isosceles triangle with two sides 5 mm. Since the erroneous insertion identifying section 4 is provided only on one of the eight edges of the compact disc cartridge which is a rectangular parallelepiped as a whole, the compact disc cartridge is not detected if the rear insertion detecting section 4 cannot be detected. It is not inserted correctly. FIG. 4 shows a conventional example of an erroneous insertion prevention device using this insertion direction identification unit 4.

This erroneous insertion preventing device is rotatably attached to a compact disc cartridge drive casing by a rotating shaft 13 and is L-shaped with one side having a long side biased toward the compact disc cartridge by a spring (not shown). The erroneous insertion prevention member 11 has a compact disc cartridge locking portion 12 at the tip of its short side.

When the compact disc cartridge 1 is correctly inserted in the compact disc cartridge drive having the erroneous insertion preventing device having the above-mentioned structure as shown in FIG. 3A, the inclined portion of the insertion direction identifying portion 4 is formed as shown in FIG. By contacting the erroneous insertion prevention member 11, the compact disc cartridge 1 is loaded while removing the erroneous insertion prevention member 11.

When the compact disc cartridge 1 is inserted in the wrong direction, that is, when it is turned upside down or the front and back are reversed, a ridge having no oblique side portion other than the insertion direction identification portion 4 of the compact disc cartridge contacts the erroneous insertion preventing member 11. Contact. Therefore, the compact disc cartridge is locked by the locking portion 12 of the erroneous insertion prevention member 4, and the erroneous insertion of the compact disc cartridge is prevented.

By the way, the outer dimensions of the 3.5-inch micro disk cartridge are 94 mm in length and 90 mm in width.
On the right side of the front end portion in the insertion direction, there is provided an erroneous insertion identification portion 4 which is a slanted portion of a right-angled isosceles triangle having two sides of 5 mm and an inclined portion, like the compact disc cartridge. These external dimensions are the same as those of the compact disc cartridge, and only the thickness is different from the compact disc cartridge of 5.6 mm to 3.3 mm.

Therefore, it is impossible to erroneously insert the compact disk cartridge into the micro disk drive, but it is possible to erroneously insert the micro disk into the compact disk cartridge drive. In this case, even if the outer dimensions are the same, since the operating position of the shutter opening / closing device and the movement amount of the shutter are different, the optical head of the drive or the micro disk may be damaged if misloaded.

The erroneous insertion preventing device can detect an erroneous insertion of a compact disk cartridge, but can detect an erroneous insertion of a micro disk having the same shape but different thicknesses. I can't.

[0017]

SUMMARY OF THE INVENTION In this application,
It is an object of the present invention to provide an erroneous insertion prevention device for the purpose of preventing accidents such as drive damage caused by erroneous insertion of an unauthorized disk cartridge into a disk cartridge drive.

[0018]

In order to achieve the above-mentioned object and solve the problems, the present invention discloses that in a disk cartridge drive for recording / reproducing a recording medium housed in a disk cartridge, the disk cartridge drive is A disc cartridge drive having a storage portion for storing the disc cartridge, and a pair of disc cartridge detecting means having a predetermined interval in the thickness direction of the disc cartridge provided in the storage portion. In a disc cartridge drive for recording / reproducing a recording medium stored in a disc cartridge, the device disc cartridge drive has a storage portion for storing the disc cartridge, and either the upper end surface or the lower end surface of the disc cartridge is stored in the storage portion. on the other hand The disc cartridge drive means is in contact with the disc cartridge drive means, and the urging means for urging the disc cartridge away from the disc cartridge detection means is provided. An invention that cannot be provided is provided.

[0019]

In the present invention having the above-mentioned structure, the switch for detecting the thickness of the inserted cartridge detects the thickness of the disc cartridge, and when the predetermined thickness is detected, the switch is inserted. The loading operation is performed assuming that the disc cartridge is a regular disc cartridge,
If the predetermined thickness is not detected, the inserted disc cartridge is regarded as an irregular disc cartridge and the loading operation is not performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, an erroneous insertion prevention mechanism applied to a compact disc cartridge drive will be described. FIG. 1 shows the configuration and operation of one embodiment of the erroneous insertion prevention mechanism according to the present invention.
(A) shows the state at the start of the compact disc cartridge insertion operation, and (b) shows the state at the end of the insertion operation.

The shutter opening / closing device of the compact disc cartridge drive shown in this figure is housed in a rear case consisting of a rear wall 14 and rear side walls 15 and 16 as in the prior art, and the rear wall 14 of the case is housed in the rear case. One end of a first arm 18 for opening and closing the shutter is pivotally supported on the pivot shaft 17 provided.

A shutter opening / closing pin 19 is provided at the other end of the shaft supporting end of the first arm 18, and the position of the shutter opening / closing pin 19 when the shutter is not operating is the disk cartridge 1.
Is a position to be engaged with a shutter opening / closing slot 9 provided on the back side of the shutter 3 when it is inserted into the compact disc cartridge drive, and the position at the end of the operation is the position where the shutter 3 is opened. ing.

A rotary shaft 19 is provided at an appropriate position on the first arm 18.
Is provided, and one end of the second arm 20 is pivotally supported on the rotating shaft 19. The second arm 20 is pivotally supported by a rotary shaft 21 provided on the cartridge carrier 22.

Further, the middle portion of the third arm 23 is rotatably supported by a rotation shaft provided on the rear side wall 16, and the elongated hole 41 provided at one end thereof causes one end of the second arm 20 to rotate. Rotating shaft 2 of cartridge carrier 22 that is freely supported
The gear 24, which is loosely fitted to the motor 1 and is provided at the other end, is a motor 25.
Is bound to.

This compact disk cartridge drive is provided with a switch 30 for detecting an erroneous insertion, and constitutes a part of an erroneous insertion preventing device. The switch 30 is attached to the disc cartridge guide portion 15 so that it operates when the disc cartridge is inserted into the drive.

Switches 26 and 2 for detecting the cartridge carrier are provided in this compact disc cartridge live.
7 is provided. When the cartridge carrier 22 moves due to the insertion of the disk cartridge 1, the switch 26 separates the contact 28 provided at the side end of the cartridge carrier 22 to activate the motor 25, and the switch 27 takes the cartridge carrier 22 all the way to the back. When touched, the contactor 29 provided at the tip end thereof causes the motor 25 to stop.

Next, an apparatus for retracting the disk cartridge by the cartridge carrier will be described. This disk cartridge retraction device has a cartridge carrier 22 that slides back and forth in a front housing, shafts 31 and 32 provided at both ends of the cartridge carrier 22, and shafts 31 and 32 that are respectively fitted and have one ends. Carrier 22
It is composed of torsion coil springs 33 and 34 fixed to, and disk cartridge gripping members 35 and 36 which are attached to the other ends of the torsion coil springs 33 and 34 and whose outer sides slide in the rear side walls 15 and 16, respectively.

This disc cartridge gripping member 35,
At the tip of 36, there are provided disc cartridge grips 37 and 38 that engage with the gripping slots 6 of the disc cartridge 1, and at the front of the rear side walls 15 and 16, there are slopes 39 and 40 that expand outward. It is provided. The gripping members 35 and 36 shown in this figure are bulged at one end to form disc cartridge gripping portions 37 and 38, which are attached to one end of a torsion coil spring. A grip may be formed at one end.

When the compact disc cartridge is inserted into the drive and pushed in, after the erroneous insertion detection switch 30 is detected, when the compact disc cartridge is pushed further in, the insertion operation start switch 26 is turned on.
The motor 25 starts to operate, the third arm 23 rotates, the second arm 20 and the first arm 18 rotate, and the shutter opening / closing pin 19 causes the shutter 3 to start opening.

When the cartridge carrier 22 is pushed into the drive, the disk cartridge gripping members 35 and 36 attached to the torsion coil springs 33 and 34 respectively fitted on the shafts 31 and 32 provided at both ends of the cartridge carrier 22. The outer side slides inside the inclined portions 39 and 40 that expand outwardly of the rear side walls 15 and 16, and the tip ends close as the inclined portion contracts.

Disc cartridge holding members 35, 36
When the tip of the disc is closed, the disc cartridge grip 37,
After 38 is engaged with the grip slot 6 of the disc cartridge 1, the insertion operation start switch 26 is turned on, and the disc cartridge is pulled into the drive together with the cartridge carrier.

When the cartridge carrier 22 is fully retracted, the insertion operation stop switch 27 operates to stop the motor 25 and stop the insertion operation.

When an eject switch (not shown) is operated to eject the disc cartridge, the motor 25 rotates in the direction opposite to that in the inserting operation to close the shutter 3 and push out the compact disc cartridge carrier 22.

Referring to FIG. 2, a switch 30 for detecting an incorrect insertion is shown.
The specific configuration and operation of the above will be described. 2 (a)-
(D) shows an example in which two switches 301 and 302 such as limit switches are vertically arranged on the side guide wall, and in order to detect the position of the inserted disc cartridge in the thickness direction. The operating portions of the switches 301 and 302 are oriented horizontally toward the disc cartridge.

When discriminating between the compact disc cartridge and the micro disc cartridge, the switch 30 is used.
1 and 302 are located at positions where both switches are pressed against the thickness of the compact disc cartridge, and are arranged at an interval larger than the thickness of the microdisc cartridge.

In this figure, (a) to (c) show the case where the micro disk cartridge is erroneously inserted, and (d) shows the case where the compact disk cartridge is correctly inserted. In the case of (a), the micro disk cartridge is inserted in the upper side, and only the switch 301 operates,
The switch 302 is not operating. In the case of (b), the micro disk cartridge is inserted in the lower side, the switch 301 does not operate, and only the switch 302 operates. In the case of (c), a micro disk is inserted in the middle, and neither of the switches 301 and 302 is operating. In the case of (d), since the compact disc cartridge is correctly inserted, both the switches 301 and 302 are operating.

As is clear from the operation relationship of the switches, both the switches 301 and 302 operate only when the compact disk cartridge is inserted. In such a state, the compact disc cartridge is further inserted, and the switch 26 is operated to enable the pull-in operation. Conversely, when both switches 301 and 302 are not operating,
This means that the compact disk cartridge is not inserted, and in such a case, the insertion operation is not started even if the switch 26 is operated, and the accidentally inserted micro disk is prevented from being drawn in or ejected. ..

2E to 2H, two switches 303 and 304 are arranged one above the other and the switch 30
The operation units 3, 304 are provided with switches 302 for detecting the vertical position of the inserted disk cartridge.
The operating section of the switch is on the lower side, and the operating section of the switch 302 is on the upper side. In the case of this example as well, the operations of (e) to (h) are the same as those of the above (a) to (d), respectively, and therefore description thereof is omitted.

Although two switches are used in the examples shown in (a) to (h) above, two switches for erroneous insertion detection are not necessarily required. Therefore, the configuration for detecting erroneous insertion with one switch is shown below.

In FIG. 9I, the operating portion of the switch 305 is oriented horizontally, and a spring 306 for pressing the disk cartridge downward is provided. The switch 305 has a spring 30 for the micro disk cartridge.
It is provided at a position where it does not turn on when it is urged downward by 6.

In FIG. 11 (j), the operating portion of the switch 307 is oriented laterally, and a spring 308 for pressing the disk cartridge upward is provided. The switch 307 is a spring 30 of a micro disk cartridge.
It is provided at a position where it does not turn on when it is biased upward by 8.

In FIG. 6K, the operating portion of the switch 309 is directed upward, and a spring 310 for pressing the disk cartridge upward is provided. The switch 309 has a spring 3 for the micro disk cartridge.
It is provided at a position where it does not turn on when it is urged downward by 10.

In FIG. 7L, the operating portion of the switch 311 faces downward, and a spring 312 for pressing the disc cartridge downward is provided. The switch 311 has a spring 3 of a micro disk cartridge.
It is provided at a position where it does not turn on when it is biased upward by 12.

In any of the cases (i) to (L) described above, the switch operates when the compact disk cartridge is inserted, but does not operate when the micro disk cartridge is inserted.

In the above embodiment, the present invention is 8 cmCD-
Although described as being applied to a ROM cartridge drive, the present invention describes another drive having a similar mechanism, that is, a 3.5 inch micro disk drive,
It is also applicable to an optical disc drive, a CD player, an optical disc player, and the like.

[0046]

As is clear from the above description, according to the present invention, it is possible to prevent accidents such as drive damage due to incorrect insertion of an unauthorized disk cartridge into the disk cartridge drive. It is possible to obtain a disk cartridge drive which has not existed in the past, and it is very effective when applied to a front loading disk cartridge drive.

[Brief description of drawings]

FIG. 1 is a structural and operational explanatory diagram of an embodiment of a disk cartridge drive of the present invention.

FIG. 2 is a specific configuration diagram and operation explanatory diagram of an erroneous insertion prevention switch.

FIG. 3 is a structural explanatory view of a compact disc cartridge.

FIG. 4 is a structural diagram and operation explanatory diagram of a conventional incorrect insertion detection device.

[Explanation of symbols]

1 Cartridge 30,301-305,307,309,311 Switch 15,16 Compact disk cartridge guide part 306,308,310,312 Spring

Claims (2)

[Claims] 1. A disk cartridge drive for recording / reproducing a recording medium contained in a disk cartridge, wherein the disk cartridge drive has a housing part for housing the disk cartridge, and the disk cartridge drive is provided in the housing part. A disk cartridge drive comprising a pair of disk cartridge detecting means having a predetermined interval in the thickness direction. 2. A disk cartridge drive for recording / reproducing a recording medium housed in a disk cartridge, wherein the device disk cartridge drive has a housing portion for housing the disk cartridge, and the disk cartridge is provided in the housing portion. A disc cartridge detecting means for abutting either one of the upper end surface or the lower end surface of the disk, and a biasing means for biasing the disk cartridge in a direction of separating from the disk cartridge detecting means. Cartridge drive.