JP3501149B2 - Disk cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge, a disc cassette, a disc caddy, a disc half, or a disc case which accommodates a disc-shaped recording medium such as an optical disc.

[0002]

2. Description of the Related Art A compact disc (hereinafter referred to as CD) system, which is standardized in Red Book, Yellow Book, etc. and records information on a disc having a diameter of 120 mm, has been widely used mainly for music. Although the system has a certain capacity for handling music information, when recording video information such as a CD-ROM, the amount of information increases, so the capacity becomes insufficient, resulting in a short recording time and image quality. There was an unavoidable decline. As a movement for coping with this, for example, a digital video disk (hereinafter, DVD) system, which is being standardized, and the like can be cited.

[0003]

The problem to be solved by the present invention is to increase the capacity of a CD system or a disk system having substantially the same size as that of the CD system. The concept of a new disk cartridge and the technical problem are as follows. Is. 1) In order to prevent scratches, dust, and stains that accompany high-density recording, the standard condition is a disc loaded in a cartridge. Even in the CD system, the length is about 135 mm and the width is about 125.
There is a case of a CD caddy having a thickness of 8 mm and a thickness of about 8 mm, but at present, a so-called tray loading method, which does not use the CD caddy, is predominant. 2) Double-sided recording ... CD is single-sided recording. The capacity can be doubled by simple calculation. 3) Enabling compatible reproduction of CDs. The selling point is that compatible reproduction of existing CDs is also possible in the disk device using the new disk cartridge. Therefore, it is an essential condition that the disc can be taken in and out and that the disc for the CD system can be built in. However, while the CD caddy is a single-sided recording and a disc clamper is attached to the case side of the caddy, the new disc cartridge is a double-sided recording system, so the clamper is on the side of the disc device. Become. Therefore, when the CD caddy is mounted on the disc device of the new disc cartridge, the two clampers interfere with each other. Therefore, C
It is necessary to prevent the D caddy from being attached to the disc device of the new disc cartridge. 4) Realization at low price ... In order to support the price for general household use, a low cost configuration including the disk device will be possible.

It is an object of the present invention to solve the above problems and provide a disk cartridge suitable for a large capacity CD.

[0005]

In order to solve the above problems, the present invention implements the following means. 1) The shutter of the disc cartridge is compatible with both sides of the disc, can be slid in both directions, and includes a structure in which the disc can be inserted and removed. Also, the case has a CD
A structure is provided to prevent the wrong insertion of a different cartridge such as a caddy. 2) A means for urging the shutter is provided at the position where the window is closed. 3) When the disc is taken in and out, as a configuration thereof, at least a part of a plane parallel to the disc surface of the case is opened. 4) When the disc is loaded and unloaded, the configuration is such that the portion outside the shutter movement range of the case is opened. 5) A compact disc standard disc can be installed. 6) As a biasing means for the shutter, one torsion coil spring whose both arms are directly engaged with the case and the shutter is arranged in each of the corner regions on both sides of the shutter when the window is closed. . 7) A disc surface discriminating means capable of discriminating whether the disc is recordable and / or reproducible on one side or on both sides is provided. 8) A disc surface designating means for designating a recordable and / or reproducible surface of the disc is provided.

[0006]

Each of the above-mentioned means 1) to 6) acts as follows 1) to 6). 1) Supports both sides of the disc, and in order to support both sides, even when the disc cartridge is turned over and inserted, the shutter opening / closing mechanism can be handled by one set, and the disc in the cartridge can be exchanged. 2) Even if the shutter is opened intentionally, the shutter will automatically close if the opening force is released. 3) The disc surface is easy to see at the time of opening, and the handling property when the disc is taken in and out is improved. 4) Interference between the shutter and the aperture structure can be avoided. 5) A compact disc standard disc can be mounted in the disc device for the new disc cartridge. 6) A shutter with a bidirectional opening and a long stroke can be realized with a thin cartridge and a structure with a small number of parts. 7) It is possible to easily know whether the recording surface of the disc is one side or both sides. 8) It is possible to easily know which side the recording surface of the disc is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be explained.

FIG. 1 shows a disk cartridge of the present invention. (A) is a partially broken plan view, (b),
(C), (d) is a side sectional view from a lower side, a right side, and an upper side, respectively.

The basic structure of the disk cartridge 100 of the present invention includes a disk 1 for recording information, cases 2 and 3 for housing the disk, a shutter 4 for opening and closing windows 2a and 3a of the case, and a shutter 4. Two springs 40, 41 for urging, a door 5 opening a part of the case,
Consists of.

The disc 1 can record and reproduce signals on both sides thereof.

The cases 2 and 3 are formed by being divided into two pieces and are bonded together. Windows 2a and 3a are formed to expose a part of the disk surface so that information can be recorded and reproduced. Partition walls 2p and 3p are formed between the disk 1 and the springs 40 and 41 to prevent dust.

The shutter 4 is integrally formed in a U-shape by shutter surfaces 4a and 4b corresponding to both sides of the disk and a side surface portion 4c integrally connecting the both. The projections 4p and 4q are engaged with the guide groove 2g formed linearly on the case, and are mounted so as to be linearly slidable in the left-right direction in the drawing.

The two springs 40 and 41 are torsion coil springs, which are in a stretched state, and are biased so that the shutter surfaces 4a and 4b of the shutter 4 are held in positions to close the windows 2a and 3a, respectively. ing. Also, the two springs have the same shape, so as not to increase the number of parts,
We are working to reduce costs. And two cases 2, 3
One is installed in each of the two corner areas 50 and 51 sandwiching the shutter 4 on the left and right. The ends of the arms of each spring are bent at right angles to the axial direction of the winding of the coil part, and each end 40a,
41a is engaged with the groove portions 2d and 3d of the case corner. The other ends 40b and 41b are engaged with stoppers 3p and 3q formed on the case 3 and having a V-shaped cross section (see also FIG. 2A), and the spring is stretched as described above. Since it is in the open state, it is positioned with high accuracy in the vertical and horizontal directions in the figure. In the present invention, the torsion coil spring has a structure in which both ends of the torsion coil spring are directly engaged with the case without interposing other parts, and the number of parts is not increased. The hook portions 4d and 4e are integrally formed with the shutter 4 so as to coincide with the vertical and horizontal positions and to shift the height in the thickness direction of the disc.
The deepest part of the groove is located. This allows
The shutter 4 is held at the left and right in the figure, that is, in the center position in the slide direction.

The side surfaces of the cases 2 and 3 when viewed from the direction of FIG. 1B are open, and the two springs can be inserted and assembled from one direction at a time with the two springs bent. The assembly is extremely good.

The door 5 is rotatably engaged with the case 2 at 5a and 5b, and is opened so that the disc can be taken in and out, as indicated by the dotted lines 5c and 1a. Here, since the door 5 has a surface parallel to the disk surface and is opened, the visibility of the disk and the ease of putting in and out at the time of opening are good.

The door 5 is a commercially available 8 cm CD-RO.
As in the case of the M cartridge, the side surface of the case may be opened.

The door 5 may not be provided when it is desired not to take out a disc such as a rental disc.

The operation when the shutter opens and closes the window is shown in FIGS.

In FIG. 2, the disk cartridge 10
When 0 is inserted into the device 200 (downward in the drawing), it is axially supported by the shaft 202 fixed to the device, is urged clockwise by the spring 203 in the drawing, and is in contact with the stopper 204. Shutter opening lever 2 on standby at
The front end portion 201a of 01 is the end portion 4 of the side surface portion of the shutter 4.
abuts r. When the shutter opening lever 201 is further inserted from this state, the shutter opening lever 201 rotates counterclockwise in the figure and slides the shutter 4 to the left side in the figure. When the slide starts, as shown in FIG. 3, the spring 4 on the left side is
The right end portion 40b of 0 is pressed and engaged with the groove portion of the left hook 4d of the shutter, and the protrusion 3p of the case
Leave from. On the other hand, the left end 41b of the spring 41 on the right side in the drawing is released from the right hook 4e of the shutter while being pressed and engaged with the protrusion 3q of the case, and the spring 41 on the right side is held as it is. It Then, as the shutter 4 slides, the right end 4 of the left spring 40
0b moves linearly and deforms in the corner region 50 as shown in FIG. Here, the side surface portion 4c of the shutter 4
Is provided with a disc caddy discriminating hole 4s, and at the position where the disc cartridge 100 is inserted to the deepest position, a projecting portion 210 is provided on the device 200 side corresponding to the discriminating hole 4s. The insertion of the disc cartridge 100 can be completed only when the protrusion 210 is fitted into the discrimination hole 4s. And a sensor (not shown) indicates that the insertion was completed up to this completion position.
After that, the entire disc cartridge 100 is moved in the rotation axis direction of the disc, and the mounting of the disc for recording and reproduction is completed.

Here, the discrimination hole 4s is provided on the CD caddy.
Since it is not present, the side surface portion 4 of the shutter 4 is located before the completion of insertion.
Since c and the tip of the protrusion 210 collide with each other, the insertion cannot be completed. This prevents the CD caddy from being mounted.

In the present invention, the disk cartridge 100 is constructed symmetrically in the state of FIG. 4 and 6 are side views showing the outer shapes of the cases 2 and 3 and the shutter 4. In FIG. 4, the discrimination hole 4s is shown in FIG.
As shown in (a), it is formed in the center of the side surface portion 4c of the shutter 4 so as to be point-symmetrical. Therefore, when the disc cartridge 100 is turned upside down and inserted, the back side of FIG.
It is configured so that it can operate in exactly the same way as
The mechanism shown in FIGS. 2 to 3 on the 0 side can be applied to both sides of the disk with only one set, thus simplifying the structure of the device and reducing the cost. Further, in the present embodiment, the discrimination hole 4s has a rectangular shape, but it may have a circular shape as shown in FIG. 4B. Further, as described above, the side surface portion 4c of the shutter 4 is
If it is point-symmetrical in, a plurality of holes may be formed as shown in FIG. Further, as shown in FIG. 5, the reducing portions 20a and 20b are provided on the front edge side orthogonal surface in the insertion direction of the cases 2 and 3 so as to be point-symmetrical on the front edge side orthogonal surface,
The protrusion 210a may be fitted in correspondence with this. Further, the reduction unit 20 may have any point symmetry, as shown in FIG.
The arrangement configurations shown in (a) to (d) of FIG.

Further, among the outer dimensions of the case, the width dimension and / or the thickness dimension, which are the front dimension of insertion into the apparatus, may be smaller than the CD caddy as the cartridge whose insertion is to be prevented.

When the disk is single-sided recording, by determining only one of the reduction units 20a and 20b corresponding to the recording surface, it is discriminated from double-sided recording and further recording surface. It is possible to specify which side the is.

Further, the combination of the reducing portion and the projection portion using the above-mentioned shape means may include, for example, the following as long as the arrangement relationship is point-symmetrical on the front edge side orthogonal plane. It can also be replaced with all other detection means. 1) A combination of a light emitting diode and a light receiving element using optical means. 2) A combination of an MR sensor using magnetic means and a magnet. 3) A combination of an ultrasonic transmitter and its receiver using acoustic means. 4) A combination of a contact switch using electric means and a conductor.

When the disc cartridge 100 is taken out of the apparatus 200, the operation reverse to the above is performed.
1 to 3, the right end 40 of the left spring 40
Reference numeral b is for returning to a state of being pressed by the protrusion 3p of the case 3.

Further, the structure using the torsion coil spring as the biasing means of the shutter means in the present embodiment, like the currently commercially available CD caddy, is in the area where the disk is not arranged in the case, and One extension coil spring may be arranged in the area occupied by the shutter means at the position where the window is closed.

[0027]

According to the present invention, a CD system, or a disk system having substantially the same size as the CD system, can be provided at a low cost to provide a large-capacity disk cartridge.

[Brief description of drawings]

FIG. 1 is a plan view showing a disc cartridge of the present invention,
And a side view.

FIG. 2 is a plan view showing a state in which the disc cartridge of the present invention has been inserted into the apparatus.

FIG. 3 is a plan view showing a state in which the disc cartridge of the present invention is completely inserted into the apparatus.

FIG. 4 is a plan view showing a configuration of a discrimination hole provided in the shutter of the disc cartridge of the present invention.

FIG. 5 is a plan view showing the structure of a discrimination hole provided in the case of the disc cartridge of the present invention.

FIG. 6 is a plan view showing an alternative configuration of the discrimination hole provided in the case of the disc cartridge of the present invention.

[Explanation of symbols]

1 disc A few cases 4 shutter 5 doors 40, 41 spring 100 disc cartridge 200 devices

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshifumi Takeuchi Inventor Toshifumi Takeuchi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Inside the Hitachi Media Visual Media Research Institute (72) Inventor Masafumi Nakamura 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Incorporated company Hitachi Media and Video Research Laboratories (72) Inventor Masayuki Inoue 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside Company Hitachi Media Visual-Media Research (72) Inventor Yoshio Suzuki Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Ltd. Visual Media Research Laboratory (72) Inventor Michio Miura Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa 292 Address Hitachi Ltd. Visual Media Research Laboratory (56) Reference JP-A-63-94460 (JP) , A) JP-A-5-81815 (JP, A) JP-A-3-280280 (JP, A) Actual Flat 5-36645 (JP, U) (58 ) investigated the field (Int.Cl. ^7, DB name) G11B 23/03 604 G11B 23/03 605

Claims (2)

(57) [Claims] 1. A first disc cartridge distinguishable from a second disc cartridge, wherein the second disc cartridge has information recorded on one disc surface and / or information recorded on one disc surface. A second optical disk which is reproduced and has a diameter of approximately 120 mm and a thickness of approximately 1.2 mm, and which has a rectangular shape and accommodates the second optical disk ,
A second case having a second window exposing a part of the second optical disk to the outside, and a spring movably mounted on the second case so as to open and close the second window. A second shutter which is biased by means of: a disc having substantially the same diameter and the same thickness as the second optical disc , and recording information on both disc surfaces and / or both discs. a first optical disk in which information from the surface is reproduced in the second case substantially the same shape, and housing the first optical disk <br/>, exposing a portion of the first optical disc to the outside A first case having a first window; and a first case movably mounted on the first case and sandwiching a position for closing the first window in a moving direction thereof in both directions. Spring-biased first shutter movable to open window of A first shutter of the side surfaces of the first case moves
Not side open, said first to said first case
And a first disc loading / unloading means capable of loading / unloading the optical disc. 2. A second disc cartridge distinguishable from a first disc cartridge, wherein the first disc cartridge records information on both disc surfaces and / or records information on both disc surfaces. A first optical disc having a diameter of about 120 mm and a thickness of about 1.2 mm which is reproduced, and has a rectangular shape, and accommodates the first optical disc ,
A first case having a first window exposing a part of the first optical disk to the outside, and a first case movably mounted in the first case and closing the first window in the moving direction. A first shutter which is movable in both directions so as to open the first window across the position where the position is set and which is biased by a spring, and is substantially the same as the first optical disc. A second optical disk having the same diameter and the same thickness, in which information is recorded on one disk surface and / or information is reproduced from the one disk surface; and a second optical disk having substantially the same shape as the first case . A second case for accommodating the optical disk , and having a second window for exposing a part of the second optical disk to the outside, and movably mounted on the second case, A second shutter biased by a spring to open and close the second window; Second shutter movement of the side surfaces of the second case
Not side open, said second to said second casing
A second disk cartridge, comprising: a second disk loading / unloading means capable of loading / unloading the optical disk.