JPS63266669A - Disk cartridge and its shutter opening/closing device - Google Patents

Abstract

PURPOSE:To widely open a corresponding part to an optical pickup by constituting a shutter into a double door so as to be capable of opening and closing in both side directions, and opening the shutter together with the insertion motion of the cartridge, at the time of the insertion of a cartridge into a device body. CONSTITUTION:When the cartridge 10 is inserted from the front face of a cabinet through an opening part 300, and the cartridge 10 is inserted up to a prescribed position, the top tips of the lever members 42 of a shutter opening closing mechanism 40 are fitted and engaged respectively with the receiving parts 221 of bearing members 22, supporting the shutters 20, 20. When the cartridge 10 is inserted further deeper, the lever members 42, engaged with the bearing members 22, are pressed and expanded toward outer side against the energization of a coil spring 44 by means of an inserting force, and the bearing members 22 slide along a guide shaft 21 toward both a right and a left sides. Accompanying this, the right and the left shutters 20, 20 are opened toward both outer sides. Thus, the correspondent part to the turn table of the disk cartridge 10 and the optical pickup is widely opened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to CDs (compact discs), CD-ROMs,
(Compact Disc - Read Only Memory)
The present invention relates to a disk cartridge that accommodates a disk-shaped disk medium applied to an optical disk device such as an MO (magneto-optical) disk, and a shutter opening/closing device thereof.

Conventional technology When optical discs such as CD, CD-ROM, and MO have dust or dirt attached to their surfaces, or touch them with fingers, the refractive index of the surface changes due to fingerprints, etc., causing errors in tracking and focus control signals. Bit error rate may increase. Therefore, in recent years, optical discs of this kind have been put into practical use in a cartridge that allows loading and unloading into and out of an optical disc device, as well as storage, while the optical disc is stored in the cartridge.

This type of disk cartridge is inserted into the apparatus main body up to a disk loading position with a disk stored therein, and is then taken out from the loading position. And the optical disc is
While still housed in the cartridge, the cartridge is inserted onto a turntable inside the device, and information is written or read by an optical pickup. Further, the optical disc is removed from the turntable and taken out when the cartridge is taken out. Therefore, in this type of disc cartridge, the parts corresponding to the turntable and optical pickup are opened and closed by shutters according to the loading and unloading of the disc.
When a disc is loaded, the turntable and part of the optical pink-up, that is, the objective lens actuator part, are received and movable so that loading and unloading of the disc and recording and reproducing of information can be performed without any trouble. Conventionally, this shutter has a single-opening structure that opens only on one side with respect to the main body case of the cartridge.

Problems to be Solved by the Invention Since the conventional shutter mechanism described above has a single-opening structure, there is a limit to the opening/closing movement stroke due to the structure of the cartridge, and it was not possible to open it very widely. This shutter is opened when a disk is loaded, as described above, and is used to receive and move the turntable and the objective lens actuator portion of the optical pickup into the cartridge through the opening.

Therefore, if the shutter is not wide open, not only the loading of the disc onto the turntable but also the recording and reproducing operations of information by the optical pickup will be hindered. However, with the conventional single-opening structure, it is not possible to open it that wide, so depending on the size, shape, etc. of the optical pickup, there are major restrictions on the usage conditions, and there are limited models of optical pickups. The problem arises that it can only be applied to

The present invention has been proposed in view of the above points, and an object of the present invention is to make the shutter of a disk cartridge have a double-opening structure so that the portion corresponding to the optical pickup can be opened wide.

It is also an object of the present invention to provide a disk cartridge having a double-opening shutter, so that the shutter can be opened to both sides smoothly along with the insertion operation into the main body of the device.
The aim is to ensure that this can be carried out reliably.

Means for Solving the Problems The present invention provides a double-opening structure in which the shutter provided at the portion of the disk cartridge corresponding to the optical pickup can be opened and closed on both sides, and when the cartridge is inserted into the main body of the apparatus,
The shutter was configured to be opened along with the insertion operation.

Further, in the present invention, the shutter has a double-opening structure that can be opened and closed on both sides, and a receiving part for opening the shutter is formed at the front in the direction in which the cartridge is inserted into the apparatus main body, while a receiving part for opening the shutter is formed on the cartridge loading path of the apparatus main body. A shutter opening/closing mechanism is provided in the apparatus, and when the cartridge is inserted into the main body of the apparatus, a member of the shutter opening/closing mechanism engages with a receiving part for opening the shutter, and the shutter is opened at the same time as the cartridge is inserted.

When loading a working disk medium, when the cartridge containing the disk medium is inserted into the main body of the apparatus, the shutters are opened on both sides as the cartridge is inserted. This opens the parts of the disc cartridge that correspond to the turntable and the optical pickup. This makes it possible to load the disk medium onto the turntable and to record and reproduce information using the optical pickup.

The shutter has a double-door structure that opens and closes on both sides, so the opening and closing stroke is approximately 2 times in a limited space.
It is twice as large, and the part that corresponds to the optical pickup can be made thicker (opener).

When the cartridge is inserted into the main body of the apparatus, the shutter opening mechanism operates in conjunction with the insertion operation, and the shutter opens on both sides.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a disk cartridge according to the present invention. This disk cartridge 10 is formed of resin into a rectangular flat shape, and has a stepped circular recess 11 in which a disk is accommodated.

A lid 12 is attached to the cartridge 10 so as to be openable and closable, and the disc A housed in the recess 11 is protected. A disc clamper 14 is installed on the inner surface of the lid 12.
is attached so that when the disc A housed in the recess 11 is loaded onto the turntable, the disc A is clamped onto the turntable L. The disk clamp 14 includes a holder part 141 formed in an annular shape at the center of the lid 12, and a clamp member 142 supported by the holder part 141 in a movable and freely rotatable manner. The clamp member 142 has a built-in magnet, and is adapted to clamp and hold the disk A by its suction force.

An opening window 15 is formed in a portion of the cartridge 10 that corresponds to the turntable and the optical pickup. The opening window 15 has a substantially circular arc shape with a diameter larger than the outer diameter of the turntable at the center of the four parts 11, and the cartridge 1 is opened from the center of the opening window 15.
It is formed to extend in parallel with a predetermined width in the front end direction in the direction of insertion into the device. When loading the disc A, the turntable and the objective lens actuator section of the optical pickup enter into the cartridge through the opening window 11,
Internal disc A is loaded onto the turntable. The optical pickup is then reciprocated within the opening window 15 in the disk radial direction. The opening window 15 is opened and closed by a pair of left and right shutters 20 and 20. Shutter 20.2
0 has a double-opening structure that can be opened and closed on both left and right sides with the center line of the opening window 15 in between. The opening/closing mechanism is configured as described below.

A space is formed at the front of the cartridge 10 in the insertion direction into the apparatus main body, and a guide shaft 21 is supported within the space in a direction perpendicular to the insertion direction.

A pair of bearing members 22, 22 made of resin or the like are slidably mounted on the guide shaft 21. The shutter 20 is supported by a bearing member 22 via a metal fitting 23. The left and right shutters 20.20 are metal fittings 23
．． The opening window 15 is always biased in the direction of closing by a spring 24 stretched between the openings 23 and 23. Furthermore, shutter 20
, 20 are regulated in position by stoppers 101 and 101 provided at the center of the front part of the cartridge 10, and are positioned and locked in the closed position. That is, cartridge 10
A pair of upper and lower stoppers 101.10 in the center of the front interior of the
1 is provided, and a bearing member 22.22 is abutted and locked to this stopper 101.101. The shutter 20.20 is regulated in position by a stop 101.101 via a bearing member 22.22.

The back surface of the cartridge 10 is a stepped portion that is lower than the side edges. A shutter 20.20 is disposed in the center of this stepped portion 102 so as to be slidable along the back surface. A guide groove 103 parallel to the guide shaft 21 is formed in the stepped portion 102 . The other side of the shutter 20.20 is fitted into this guide groove 103 and guided in the opening/closing direction. A holding plate 104 made of a PVC sheet or the like is attached to the upper part of the guide groove 103.
The other side of the shutter 20.20 is held down from above to prevent it from coming out of the guide groove 103.

The shutter 20.20 is guided by the guide shaft 21 and the guide groove 103 so as to be slidable in the opening/closing direction.

At the front of the bearing members 22 and 22 in the direction in which the cartridge 10 is inserted into the main body of the apparatus, receiving parts 221 for opening and closing the shutter are respectively formed in a concave shape. When loading the disk A, the tips of the lever members 42, 42 of the shutter opening/closing mechanism 40 provided on the apparatus main body side are inserted into and engaged with the receiving portions 221, 221, respectively.

On the other hand, as shown in FIG. 5, an opening 300 into which the cartridge 10 is inserted is formed in the front surface of the cabinet 30 in the main body of the optical disk device into which the disk A is loaded. A turntable 32, which will be described later, is disposed on the lower chassis at the inner rear of the opening 300. An optical pickup 33 is mounted on the side of the turntable 32 so as to be movable back and forth in the disk radial direction.

The cartridge 10 inserted through the opening 300 on the front surface of the cabinet is inserted and held in a holding frame 31 provided inside the rear thereof. Then, it is fed in the horizontal front-rear direction by a well-known feeding mechanism such as a rack and pinion mechanism.

Further, the cartridge 10 is mounted vertically with the holding frame 31 at a disc loading position corresponding to the turntable 32.
sent to de.

By this forward movement, the disc A inside the cartridge 10 is loaded onto the turntable 32.

At the center of the inner bottom of the holding frame 31, a shutter opening/closing mechanism 40 for opening and closing the shutters 20 and 20 of the cartridge and the tray 10 is disposed. This shutter opening/closing mechanism 40 is configured as follows.

A support shaft 41 is erected at the center of the inner bottom of the holding frame 31. A pair of lever members 42 and 42 for opening and closing the shutter are supported on the support shaft 41 so as to be rotatable in the shutter opening and closing direction along the inner bottom surface.

A bottle 43 is erected at the tip of the lever member 42.42. When the cartridge 10 is inserted into the holding frame 31, the tip of the lever member 42.42 is inserted into the bearing member 2.
2. It is fitted and secured into the receiving part 221 formed at 22. This engagement applies force to the shutters 20, 20 to open them left and right along with the insertion operation of the cartridge 10. The lever member 42.42 is constantly urged inwardly by the coil spring 44 in the direction of closing. That is, the lever member 42.42 is constantly urged by the spring 44 in the direction of closing the shutter 20.20. coil spring 44
is wound around the support shaft 41. Both ends thereof are respectively engaged with claw pieces 421 formed on the lever members 42 and 42.

In the above configuration, when loading a disk, when the cartridge 10 is inserted through the opening 300 from the front of the cabinet of the apparatus main body, the cartridge 10 is inserted and held in the holding frame 31 inside the main body. Cartridge 10
When the is inserted to the specified position, the shutter opening/closing mechanism 4
As shown in FIG. 6, the tip of the lever member 42.
22 and are fitted into and engaged with the receiving portions 221 of 22, respectively. When the cartridge 10 is inserted further into the interior, the lever members 42.42 engaged with the bearing members 22.22 are pushed outward against the bias of the coil spring 44 by the insertion force. Then, the bearing member 22.22 is biased by the tip of the lever member 42.42, and slides along the guide shaft 21 to both the left and right sides. Along with this, the left and right shutters 20
．． 20 are opened outwardly on both sides. (And then, Kartli.

The shutter opening/closing mechanism operates together with the insertion operation of the screw 10.
The left and right shutters 20.20 are opened on both sides. As a result, the opening window 15 of the cartridge 10 is opened. At the same time, the cartridge 10 is held in the holding frame 31. Opening of the holding frame 31 [The portion corresponding to the first window 15 is open.

Thus, after the opening window 15 is opened, the cartridge 10 is sent horizontally back and forth along with the holding frame 31 by the above-mentioned feeding mechanism, and then vertically downward at the disk loading position. With this downward feeding operation, the back surface of the cartridge 10 moves further below the disk mounting surface of the turntable 32, and as shown in FIG. It enters the inside of the cartridge 10 through the opening window 15. As a result, the disc A is loaded onto the turntable 32 inside the cartridge 10. At this time, the disk A is in a position floating at a certain height from the recess 11,
It is designed to be able to rotate inside the cartridge 10 without any hindrance. Further, when the disc A is loaded onto the turntable 32, the clamp member 142 of the disc clamper 14 provided on the inner surface of the lid 12 is pressed against the turntable via the disc A, and the disc is clamped onto the turntable. . At the same time, the objective lens actuator 330 of the optical pickup 33 faces the recording surface of the disk A through the aperture window 15, and becomes capable of reciprocating movement in the disk radial direction inside the aperture window 15. Therefore, the length of the opening window 15 in the longitudinal direction needs to be set to a length that can sufficiently cover the reciprocating stroke of the optical pickup 33.

After the disk A is loaded in this manner, the optical pickup 33 is linearly sent back and forth in the radial direction with respect to the rotating disk A, and information is written or written information is read.

When the recording or reproduction of information on the disc A is completed, the cartridge 10 containing the disc A is taken out through the opening part 300 in the front side of the cabinet 30 of the main body of the apparatus through the reverse route as described above.

During removal, when the holding frame 31 holding the cartridge 10 is positioned at the back of the opening 11 300 on the front side of the cabinet, the lock of the cartridge 10 is released, and the cartridge 10 is opened 1, by the operation of an eject mechanism (not shown). It is sent out to the front side through the first part 300. This feeding operation causes the shutter opening/closing mechanism 4
The outward pushing and spreading force applied to the lever members 42 and 42 of 0 is eliminated. Then, the lever members 42, 42 are rotated back inwardly so that they are attracted to each other by the bias of the spring 44. In particular, the bearing ffl<22 of the bearing member 22.22
1.221 is released, and the bearing member 22.22 separates from the tip of the lever member 42.42. This results in
Under the bias of the spring 24, the bearing member 22.22 slides back inward to the position where it abuts against the stop 101.101. With this sliding action, the left and right shutters 20
．． 20 is closed. That is, the opening window 15 is closed.

After the opening window 15 is closed by the left and right shutters 20.20, the cartridge 10 is taken out to the front of the cabinet through the opening 300.

As described above, when the cartridge 10 is inserted into the main body of the apparatus, the shutters 20 and 20 are opened to both the left and right sides.
The opening window 15 corresponding to the turntable 32 and the optical pickup 33 is opened.

Further, the shutters 20, 20 are closed together with the operation of taking out the cartridge 10, and the opening window 15 is closed.

As described in detail, according to the present invention, the shutter for opening and closing the opening window has a double-opening structure and is opened and closed on both sides, so that the opening and closing stroke can be approximately twice as large as that of a single-opening structure. The part of the cartridge that corresponds to the optical pink-up can be opened wide. Therefore, it can be used with optical pick amplifiers of various sizes and types without any problem.

Historically, the shutter can be opened and closed on both sides smoothly and reliably in conjunction with the cartridge insertion operation.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a disk cartridge according to the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a sectional view of main parts of the cartridge, and FIG. 4 is a sectional view taken along the line ■-■ in FIG. 2. , Fig. 5 is a transparent perspective view of the main body of the device in which the disc is v2N#, Fig. 6 is a plan sectional view of the main part explaining the opening/closing operation of the shutter, and Fig. 7 shows the loaded state of the disc stored in the cartridge. FIG. DESCRIPTION OF SYMBOLS 10...Disk cartridge, DI A...Disk, 15.Opening window, 20.20.φ shutter, 21...Guide shaft, 22.22...Bearing member, 221...Receiving part , 40... Shutter opening/closing mechanism, 41... Shaft, 42. 42. Lever member, 44... Coil spring, 32... Turntable, 33... φ optical pickup. Patent Applicant: NEC Home Electron Co., Ltd. Representative: Tadashi Saeki, Patent Attorney Figure 2 Figure 3 Figure 4 Figure 6

Claims (2)

[Claims] (1) The main body case that stores the disk medium has an opening window in the part that corresponds to the turntable and optical pickup into which the disk medium is loaded, and a shutter that opens and closes this opening window according to the loading and unloading of the disk medium. In the disc cartridge, the shutter has a double-opening structure that can be opened and closed on both sides with respect to the center of the opening window, so that when the disc cartridge is inserted into the main body of the apparatus having the turntable, the shutter is opened along with the insertion operation. A disc cartridge characterized by: (2) The main body case that stores the disk medium has an opening window in the part corresponding to the turntable and optical pickup into which the disk medium is loaded, and a shutter that opens and closes this opening window in accordance with loading and unloading of the disk medium. In the disc cartridge, the shutter has a double-opening structure that can be opened and closed on both sides with respect to the center of the opening window, and a receiving part for opening the shutter is formed at the front in the direction of insertion of the cartridge into the apparatus main body, An opening/closing mechanism for the shutter is provided on the cartridge loading path of the apparatus main body, and when the cartridge is inserted into the apparatus main body, a member of the opening mechanism engages with the receiving part for opening the shutter, and the shutter opens. A shutter opening/closing device for a disk cartridge, characterized in that it is opened along with the insertion operation.