JPH0541010A - Disk cartridge device - Google Patents

Abstract

PURPOSE:To surely prevent erroneous insertion of an abnormal cartridge by constituting an erroneous insertion preventive means with two members rotating while abutting to the upper and lower sides of the cartridge. CONSTITUTION:The erroneous insertion preventive means is constituted of the 1st erroneous insertion preventive member 19 rotating while abutting to the upper side of tip part of the inserted cartridge and the 2nd erroneous insertion preventive member 20 rotating while abutting to the lower side of tip part of the inserted cartridge. The 1st and 2nd preventive members 19, 20 are arranged with keeping a specific distance. When the normal disk cartridge is accurately inserted with this constitution, both preventive members 19, 20 are rotated together, then the cartridge is loaded. But, when the insertion is erroneously made, one of the preventive members 19, 20 is only rotated and no cartridge is loaded.

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, if the rear insertion identifying section 4 cannot be detected, the compact disc cartridge is 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.

[0014]

By the way, the outer dimensions of the 3.5-inch micro disk cartridge are 94 mm in length and 90 mm in width, and two sides are 5 mm on the right side of the front end in the insertion direction, like the compact disk cartridge. Is a right-angled isosceles triangle, and an erroneous insertion identification section 4 composed of an inclined section is provided. 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 disc cartridge into the microdisc drive, but it is possible to erroneously insert the compact disc cartridge into the compact disc cartridge drive. In that case, even if the outer dimensions are the same, for example, since the operating position of the shutter opening / closing device and the reproducing means inside the drive are completely different, the optical head of the drive or the micro disk may be damaged if misloaded.

The erroneous insertion prevention device can detect an erroneous insertion of a compact disk cartridge, but detects an erroneous insertion of a micro disk cartridge having the same shape but different thicknesses. It is not possible.

By the way, in the compact disc cartridge, in addition to the erroneous insertion identifying portion 4, the depth is 2.8 mm, which is half the thickness 5.6 mm of the compact disc cartridge on the back side, and is a 5 mm square recess. An erroneous insertion detection unit 10 is provided.

However, there has been no apparatus that effectively prevents the micro disk from being inserted into the compact disk cartridge drive by utilizing the erroneous insertion detection section 10 although the apparatus is provided.

An object of the present invention is to provide an erroneous insertion prevention device capable of preventing accidents such as drive damage due to erroneous insertion of an unauthorized disk cartridge into a disk cartridge drive. ..

[0020]

In order to achieve the above-mentioned object, the present invention provides a "disc cartridge drive for recording / reproducing information on / from a recording medium housed in a disc cartridge, which is a disc cartridge drive. A first erroneous insertion preventing member having a cartridge erroneous insertion preventing means, the first cartridge erroneous insertion preventing member abutting the upper end of the inserted disk cartridge and rotating by further insertion of the disk cartridge, and the inserted disk. The second erroneous insertion preventing member is in contact with the lower end of the cartridge and rotates by further insertion of the disk cartridge. The first erroneous insertion preventing member and the second erroneous insertion preventing member are arranged with a predetermined distance. It is a disk cartridge drive characterized by To provide the invention, which it can not matter.

[0021]

In the disk cartridge drive of the present invention having the above-mentioned structure, the thickness of the inserted disk cartridge is detected by the erroneous insertion preventing means, and the regular disk cartridge having the original thickness is inserted. Only when the disc cartridge is loaded, the disc cartridge is loaded. When an irregular disc cartridge having an original thickness is inserted, the disc cartridge is not loaded.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the erroneous insertion preventing means according to the present invention. In these figures, the width direction of the disk cartridge is X axis, the length direction is Y axis, and the thickness direction is Z axis. FIG. 1 is a top view of a compact disc cartridge drive provided with an erroneous insertion preventing device according to the present invention.

FIG. 2A shows a side view of the incorrect insertion preventing means, and FIG. 2B shows an exploded perspective view of the incorrect insertion preventing member.
The erroneous insertion preventing means of the present invention is basically composed of two erroneous insertion preventing members having an F-shape, of which the first
The erroneous insertion preventing member 19 is provided at a position where the erroneous insertion identifying portion 4 side of the inserted disk cartridge comes into contact with the erroneous insertion preventing member 19 by the shaft supporting hole 25 provided in the lower end portion 23 in the Y-axis direction of the F-shape. It is rotatably attached to the moving shaft 15. Similarly, the locking portion 27 for locking the biasing spring 17 attached to the housing upper wall 21 has an F-shaped Y shape.
It is provided at the lower end portion 23 in the axial direction.

The second erroneous insertion preventing member 20 is provided with a shaft support hole 26 provided at the lower end 24 of the F-shape in the Y-axis direction at the position where the erroneous insertion identifying portion 4 side of the inserted disk cartridge abuts. The lower upper wall 22 is rotatably attached to the second rotating shaft 16. Similarly, the lower case wall 2
A locking portion 28 for locking the urging spring 18 attached to the No. 2 is provided on the F-shaped lower end portion 24.

The upper side of the F-shape of the first erroneous insertion preventing member 19 extends in the X-axis direction to the position where it abuts on the front end portion other than the oblique side 4 of the erroneous insertion identifying portion of the inserted disk cartridge, and the second portion. The falling portion 2 is formed of a falling portion 35 facing the direction of the wrong insertion preventing member 20 (Z axis direction), and the middle side is a falling portion 2 facing the direction of the second wrong insertion preventing member 20 (Z axis direction).
9 and a first contact portion 31 extending in the X-axis direction at a position contacting only the oblique side 4 of the erroneous insertion identifying portion of the disk cartridge inserted from the tip of the falling portion 28.

The upper side of the F-shape of the second misinsertion preventing member 20 extends in the X-axis direction to the position where it abuts on the front end of the inserted disc cartridge other than the oblique side of the misinsertion identifying part 4 and the first part 34. The rising portion 3 is formed of a rising portion 36 facing the direction of the wrong insertion preventing member 19 (Z axis direction), and the middle side is rising portion 3 facing the direction of the first wrong insertion preventing member 19 (Z axis direction).
0 and a second contact portion 32 having a hypotenuse portion 39 provided only at a position abutting on the hypotenuse portion of the erroneous insertion identification portion 4 of the disc cartridge inserted from the tip of the rising portion 30.
It consists of

The distance between the first contact portion 31 on the middle side of the first wrong insertion prevention member 19 and the second contact portion 32 on the middle side of the second wrong insertion prevention member 20 is greater than the thickness of the compact disc cartridge. It is smaller and larger than the thickness of the microdisk cartridge. In addition, the first erroneous insertion prevention member 1
9 falling edge 35 and second erroneous insertion prevention member 2
The length of the rising portion 36 on the upper side of 0 is long enough to lock the inserted disk cartridge.

The operation of the erroneous insertion preventing means in the compact disc cartridge drive according to the embodiment of the present invention will be described with reference to FIGS. FIG. 5 shows an example in which the compact disc cartridge is correctly inserted into the compact disc cartridge drive of the present invention. In FIG. 5A, the compact disc cartridge is correctly inserted and its front end abuts against the erroneous insertion preventing means. State
(B) shows a state in which the correctly inserted compact disc cartridge is loaded without being blocked by the erroneous insertion preventing means. (A) shows a state in which the compact disc cartridge inserted inside out is not loaded by being blocked by the erroneous insertion prevention means, and (b) shows a compact disc cartridge inserted backwards from the erroneous insertion prevention means. Therefore, the respective states that the compact disc cartridge drive is not loaded are shown.

As shown in (b), the compact disc cartridge correctly inserted as shown in (a) has the first contact portion 31 and the second contact portion 31 at the middle side of the first erroneous insertion preventing member 19 as shown in (b).
The second contact portion 32 on the middle side of the erroneous insertion prevention member 20 is rotated to be inserted and loaded.

FIG. 6 shows an example in which the compact disc cartridge is inserted in the wrong direction in the compact disc cartridge drive according to the embodiment of the present invention. (A) is an example in which the compact disc cartridge is inserted inside out, (b) is an example in which the front and back are inserted reversely, and the second erroneous insertion prevention having the oblique side portion 39 in the second contact portion 32 of the middle side Although the member 20 rotates, the first contact portion 31 on the middle side
The first erroneous insertion prevention member 19 having no oblique side does not rotate. Therefore, the front end portion of the compact disc cartridge inserted inside out or the rear end portion when the front and rear sides are reversed is the first contact portion 31 of the first erroneous insertion prevention member 19.
Locked in and not loaded.

FIG. 7 shows an example in which the 3.5-inch micro disk cartridge is inserted from the front end into the compact disk cartridge drive according to the embodiment of the present invention, and (a) shows the micro disk cartridge on the upper side. , (B) are examples in which the micro disk cartridge is inserted along the lower side.

In (a), the front end of the micro disk cartridge is the first side of the middle side of the first erroneous insertion preventing member 19.
The first erroneous insertion prevention member 19 rotates by contacting the contact portion 31, but the second contact portion 32 on the middle side of the second erroneous insertion prevention member 20.
The second erroneous insertion preventing member 20 does not rotate because the second erroneous insertion preventing member 20 does not come into contact with the oblique side portion 39. Therefore, the front end portion of the micro disk cartridge is locked to the rising portion 36 of the second erroneous insertion prevention member 20 and is not loaded.

In (b), the micro disk cartridge abuts the oblique side portion 39 of the second abutting portion 32 at the middle side of the second erroneous insertion preventing member 20, and the second erroneous insertion preventing member 20 rotates. The first erroneous insertion preventing member 19 does not contact the first contact portion 31 on the middle side of the first erroneous insertion preventing member 19, and the first erroneous insertion preventing member 19 does not rotate. Therefore, the front end portion of the micro disk cartridge is locked to the falling portion 35 of the first erroneous insertion prevention member 19 and is not loaded.

Since the operation when the micro disk cartridge is inserted backwards and forwards is the same as when the compact disk cartridge is inserted backwards and forwards, the description thereof is omitted.

In the above embodiment, the present invention is 8 cmCD.
-Although it has been described that it is applied to a ROM cartridge drive, the present invention is also applicable to a drive having a similar mechanism.

In the embodiment described above, the inserted disk cartridge has the same size except the thickness,
Moreover, although the case where the insertion direction detection portion is provided has been described, the present invention is not limited to this, and in the case of a disc cartridge having the same size in portions other than the thickness, by providing inclined portions at each contact portion. It is possible to prevent erroneous insertion even if the insertion direction detection unit is not provided.

Further, the first abutting portion and the falling portion and the second abutting portion and the falling portion may not be provided separately but may be integrally provided as in the conventional example shown in FIG. is there.

[0038]

As is apparent from the above description, according to the present invention, it is possible to prevent an accident such as a drive damage due to an improper disc inserted into a disc cartridge drive, which has not existed in the past. It is possible to obtain a disc cartridge drive capable of performing the above, and it is very effective particularly when applied to a front loading type disc cartridge drive.

[Brief description of drawings]

FIG. 1 is a structural diagram of a compact disc cartridge drive including an erroneous insertion prevention device according to the present invention.

FIG. 2 is a side view and an enlarged exploded view of a disk cartridge erroneous insertion prevention unit of the present invention.

FIG. 3 is an explanatory diagram of a compact disc cartridge.

FIG. 4 is an explanatory diagram of a conventional incorrect insertion prevention device.

FIG. 5 is an explanatory view of the inserting operation of the compact disc cartridge by the erroneous insertion preventing device of the present invention.

FIG. 6 is an explanatory view of an erroneous insertion prevention operation of the compact disc cartridge by the erroneous insertion prevention device of the present invention.

FIG. 7 is an explanatory view of an erroneous insertion preventing operation of the micro disk cartridge by the erroneous insertion preventing device of the present invention.

[Explanation of symbols]

 19 1st mis-insertion prevention member 20 2nd mis-insertion prevention members 31, 32 Contact part

Claims (1)

[Claims] 1. A disc cartridge drive for recording / reproducing information on / from a recording medium contained in a disc cartridge, wherein the disc cartridge drive has a disc cartridge erroneous insertion preventing means, and the disc cartridge erroneous insertion preventing means. Is a first erroneous insertion preventing member that comes into contact with the upper end of the inserted disc cartridge and rotates by further insertion of the disc cartridge, and a first erroneous insertion preventing member that comes into contact with the lower end of the inserted disc cartridge and rotates due to further insertion of the disc cartridge. A disk cartridge drive comprising a moving second misinsertion prevention member, wherein the first misinsertion prevention member and the second misinsertion prevention member are arranged with a predetermined distance.