JP3211293B2 - 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 disk cartridge containing a disk-shaped recording medium such as an optical disk capable of recording an information signal such as a musical sound signal and a video signal, and more particularly to a disk cartridge having a disk-shaped recording medium. The present invention relates to a device having a shutter member that opens and closes an opening that exposes at least a part of a recording surface radially outward.

[0002]

2. Description of the Related Art Hitherto, optical disks and magneto-optical disks have been proposed as disk-shaped recording media capable of recording information signals such as musical sound signals and video signals. In the case of this type of disc, if dust or dirt on fingers is attached to the signal recording surface or even if it is slightly scratched, there is a possibility that information signals cannot be recorded and reproduced.

[0003] Therefore, the above-mentioned optical disk and magneto-optical disk are stored in a cartridge body as a protective storage housing in order to prevent dust and dirt from being attached to the fingers and to prevent scratches and to simplify handling. Thus, the disk cartridge is configured.

[0004] The disc stored in the cartridge main body is mounted on the recording / reproducing apparatus while being stored in the cartridge main body, and rotated in the cartridge main body. Therefore, in the cartridge body, a clamp opening for opening a portion to be clamped, which is clamped by a disk rotation driving device provided on the recording / reproducing device side provided at the center of the disk, is opened. I have.
Further, the cartridge body is provided with a recording / reproducing opening for exposing a part of the signal recording surface of the disc to the outside in the radial direction.

That is, the disk accommodated in the cartridge body is clamped by a disk rotation drive device via a clamp opening and rotated, and is opposed to a signal recording surface of the disk via the recording / reproducing opening. The information signal is recorded and reproduced by the signal recording and reproducing means.

When the opening is formed in the cartridge main body as described above, it is ensured that dust does not enter the cartridge main body or inadvertent contact of the finger with the disk surface during non-use such as storage, which is not attached to the recording / reproducing apparatus. Can not be prevented. Therefore, a shutter member that closes the opening when the disc cartridge is not mounted on the recording / reproducing apparatus is attached to the cartridge body.

[0007]

As a disc-shaped recording medium on which information signals can be recorded, a magneto-optical disk capable of erasing the recorded information signals and recording new information signals has been proposed. Have been. A magneto-optical disk capable of re-recording this information signal irradiates a signal recording layer with a light beam from an optical head from one main surface side and the other main surface facing the surface irradiated with this light beam. A desired information signal is recorded by applying a magnetic field modulated from the surface side according to the information signal to be recorded via an external magnetic field generator.

In the magneto-optical disk capable of re-recording an information signal as described above, the optical head and the external magnetic field generator are opposed to both main surfaces when recording the information signal. In a disk cartridge configured to house a magnetic disk, a recording / reproducing opening is opened on both opposing main surfaces of the cartridge body.

However, when reproducing a recorded information signal from the magneto-optical disk, it is sufficient to irradiate the signal recording layer with a light beam. Therefore, when reproducing the information signal recorded on the magneto-optical disk, it is only necessary to open one recording / reproducing opening facing the optical head.

[0010] As described above, the magneto-optical disk as a recording medium on which information signals can be re-recorded is used for recording information signals for re-recording and for information signals such as desired tone signals in advance. It is conceived that the recorded information signal is used only for reproducing the recorded information signal.

Further, since a recording / reproducing apparatus using a magneto-optical disk as a recording medium is provided with an optical head, an information signal is recorded in advance with compatibility with the above-mentioned magneto-optical disk and is manufactured. It is considered that an optical disk used only for reproducing an information signal is used as a recording medium.

As described above, in the case of a magneto-optical disk used only for reproducing an information signal recorded in advance or a disk cartridge containing an optical disk exclusively used only for reproducing an information signal, one side of the cartridge body is used. Opening for reproduction and opening for clamp only on the main surface side,
The entire surface may be kept closed without opening any opening on the other main surface side.

As described above, in a disk cartridge in which it is sufficient to provide an opening only on one main surface side, the other main surface side of the cartridge main body which does not need to provide an opening is housed in the cartridge main body. It can be used as a sticking surface or a printing surface of a label for displaying the content of the information signal recorded on the disc.

In the case of a magneto-optical disk used only for reproducing an information signal recorded in advance or a disk cartridge containing an optical disk exclusively used only for reproducing an information signal, the surface on which the label is adhered, In order to increase the area of the printing surface or the like, it is necessary to use a shutter member sufficient to close the opening formed only on one main surface side of the cartridge body. In particular, if the diameter is 64
In the case of a disk cartridge containing an optical disk having a small diameter of mm, the length of each side is 68 mm to 72 mm. When the shutter member is extended, the area of the label sticking surface or the printing surface cannot be sufficiently guaranteed.

Therefore, a shutter member sufficient to close the opening formed only on one main surface side of the cartridge main body needs to be supported only on one half side of the cartridge main body having the opening formed. There is.
As described above, in the shutter member supported by only one half of the cartridge body, it is necessary to maintain the processing accuracy of the shutter member and the molding accuracy of the cartridge body to which the shutter member is attached.
That is, since the shutter member is supported by the cartridge body with a cantilever support structure, if it is not supported with a high-precision support structure, it is impossible to guarantee the close contact with the cartridge body, and a reliable opening In addition to being unable to close, the cartridge easily falls off from the cartridge body, and swings during the sliding operation, so that it is impossible to perform stable sliding.

Therefore, the present invention guarantees the secure attachment of a so-called one-sided shutter member to the cartridge body, which is configured to close an opening formed only on one main surface side of the cartridge body, It is an object of the present invention to provide a disk cartridge that can reliably close the opening and reliably protect a disk-shaped recording medium housed in a cartridge body.

Further, the present invention can be applied not only to the one-sided shutter member but also to a double-sided shutter member attached to a cartridge body having openings on both main surfaces. Even when the present invention is applied to the cartridge body, it is ensured that the shutter member is securely attached to the cartridge body, and that the opening is securely closed, and that the disk-shaped recording medium housed in the cartridge body is reliably protected. It is an object of the present invention to provide a disc cartridge which can be used.

[0018]

In order to achieve the above object, a disk cartridge according to the present invention is formed by butt-connecting a rectangular upper half and a lower half to rotate a disk-shaped recording medium. A cartridge body having at least one main surface formed with an opening for radially exposing at least a part of a signal recording surface of the disc-shaped recording medium in a radial direction, and sliding on the cartridge body. A shutter member that is attached so as to be capable of opening and closing the opening. The shutter member is
A shutter portion for closing the opening, and a rising piece that forms a slide guide section that is long with respect to the width of the shutter section, wherein the rising piece is an outer main surface of one of the upper and lower halves. A first engaging portion that engages with a first engaging groove formed on an end portion side of the cartridge body with respect to the opening portion, and between the opposing inner main surfaces of the upper and lower halves; A second engagement portion that is inserted and engages with a second engagement groove formed in the other inner side main surface of the upper and lower halves; and the upper half and the lower half opposing each other. It has a pair of slide guide pieces which are inserted between the main surfaces on the inner side and extend on the upper end surface of the shutter slide guide wall rising from the half having the first engagement groove formed thereon.

[0019]

The shutter member of the disk cartridge according to the present invention has a first half formed on the outer side of one of the upper and lower halves constituting the cartridge main body and closer to the end than the opening.
The first engaging portion is engaged with the engaging groove of the upper half and the second engaging groove inserted between the opposing inner surfaces of the upper and lower halves and formed on one of the other inner surfaces of the upper and lower halves. By preventing the cartridge body from slipping off by engaging the engaging portions of No. 2 and being attached to the cartridge body,
The sliding direction is guided by the first and second engagement grooves so that the cartridge can be moved in a direction to open and close an opening formed in the cartridge body. Further, when the shutter member is moved in the direction of opening and closing the opening, the pair of slide guide pieces slide and move on the upper end surface of the half-side shutter slide guide wall.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

The embodiment described here is applied to a disk cartridge containing an optical disk used only for reproducing an information signal recorded in advance.

As shown in FIG. 1, the disc cartridge has a rectangular cartridge body 4 formed by joining an upper half 2 and a lower half 3 to each other and joining them together. The optical disk 1 used only for reproducing the information signal is stored.

The optical disk 1 housed in the cartridge body 4 has a signal recording layer formed on one main surface side of a disk substrate formed by molding a transparent synthetic resin, and a digital signal is formed on the signal recording layer. An information signal such as a desired tone signal is recorded as a pit string.

As shown in FIG. 3, a center hole 1a is formed in the center of the optical disk 1, and a magnetic plate 1b is disposed so as to close the center hole 1a. The optical disk 1 has a center hole 1a engaged with a centering member provided at the center of a disk table constituting a disk rotation driving device provided in the recording / reproducing apparatus, and the magnetic plate 1b By being attracted to the magnet arranged on the table side, the disk table is mounted so as to be centered on the disk table.

As described above, the cartridge body 4 is constructed by butt-connecting the upper and lower halves 2 and 3.
As shown in FIG. 3, when the disk cartridge is mounted on a recording / reproducing apparatus, a disk table entry opening into which a disk table of a disk rotation drive for rotating the optical disk 1 stored in the cartridge body 4 enters. Department 5 has been established. That is, the disk table entry opening 5 is provided on the disk table including the center hole 1a of the optical disk 1 housed in the cartridge main body 4 and the magnetic plate 1b for magnet clamping disposed so as to close the center hole 1a. The lower half 2 constituting the lower main surface of the cartridge body 4 so that the peripheral portion of the center hole 1a placed on the cartridge body 4 can face outward.
Is formed with a circular opening substantially at the center.

Further, at least the part of the signal recording area of the optical disk 1 housed on the lower half 3 constituting the lower main surface of the cartridge body 4 is exposed outwardly over the inner and outer circumferences. An information signal reproducing opening 6 is provided. As shown in FIG. 3, the information signal reproducing opening 6 extends from a position close to the disk table entry opening 5 to a substantially central position in the left-right direction of the cartridge main body 4 from the front side of the cartridge main body 4. It is located and formed in a square shape.

As shown in FIGS. 1 and 2, the upper half 2, which constitutes the upper main surface of the cartridge body 4, is closed without any opening. I have. As shown in FIG. 2, a label 7 indicating the content of information signals recorded on the optical disk 1 housed in the disk cartridge is attached to the upper surface side of the closed cartridge body 4 as shown in FIG. The label attaching recess 8 to be formed is formed over substantially the entire surface.

In order to prevent dust and the like from entering the cartridge body 4 through the information signal reproducing opening 6 and from adhering to the optical disk 1 stored therein, A shutter member 11 for opening and closing the information signal reproducing opening 6 is slidably mounted.

On the front side of the cartridge body 4 where the shutter member 11 moves, a shutter opening operation pin provided on the side of the recording / reproducing apparatus for moving the shutter member 11 enters. An insertion groove 12 is formed. As shown in FIGS. 2 and 3, the shutter opening operation pin insertion groove 12 has an opening end 12 a on one side surface orthogonal to the front surface of the cartridge body 4 and is formed in the movement direction of the shutter member 11. It becomes.

On the front side of the lower half 3, as shown in FIG. 4, it projects into the shutter opening operation pin insertion groove 12 to ensure stable movement of the shutter member 11. For this purpose, a shutter slide guide wall 13 is formed upright.

The shutter member 11 which opens and closes the information signal reproducing opening 6 is formed by molding a synthetic resin, and as shown in FIGS. Shutter 15 having a size small enough to close opening 6 for use
And a slide guide portion 16 formed on the base end side of the slide guide.

The slide guide portion 16 constitutes a portion for attachment to the cartridge body 4 and has a function of guiding the sliding direction of the shutter portion 15, and is elongated with respect to the width of the shutter portion 15. It is formed in. As shown in FIG. 1, when the shutter member 11 is attached to the cartridge body 4, the slide guide 16 has a height along the front surface of the cartridge body 4 that is lower than the thickness D ₁ of the cartridge body 4. H ₁
Thus, a rising piece 17 is formed. To form a rising piece 17 have such a height H ₁ is to be configured to be mounted to the cartridge body 4 without face the shutter member 11 to the upper half 2 side.

Then, the shutter portion 1 of the rising piece 17
5 is connected to the shutter unit 15
A support protruding piece 18 for supporting the outer surface of the lower half 3 protrudes from a portion protruding from both sides of the lower half 3. As shown in FIG. 4, the inner side surface of the support projection 18 on the distal end side is closer to the end side of the cartridge body 4 than the information signal reproducing opening 9 on the outer side of the lower half 3. The shutter member 11 engages with an outer slide guide groove 19 that constitutes a first engagement groove that regulates the slide direction of the perforated shutter member 11, guides the slide direction of the shutter member 11, and includes a cartridge for the shutter member 11. A pair of outer engaging projections 20, 20 constituting a first engaging portion for preventing the main body 4 from coming off, are protruded.

Further, the support projection 1 of the rising piece 17 is provided.
A shutter opening operation pin insertion groove 1 formed between the upper and lower halves 2 and 3 is provided on the other side opposite to the one side where the projection 8 is provided.
An insertion piece 22 to be inserted into the projection 2 is provided so as to be parallel to the support projection 18. The insertion piece 22 is formed to have substantially the same width as the width of the shutter portion 15, and has a second outer surface formed on the inner surface of the upper half 2 so as to rise from the insertion piece 22 on the outer surface on the distal end side. An inner engaging ridge 24 that constitutes a second engaging portion that engages with the inner slide guide groove 23 that constitutes the engaging groove is provided in a protruding manner.

The inner engaging ridge 24 constituting the second engaging portion is formed over substantially the entire width of the insertion piece 22, but a plurality of ridges are provided in parallel. It may be something.

Further, on the other side edge side of the rising piece 17 and one end side protruding from the side of the shutter portion 15,
A locked piece 27 that engages with a lock portion 26 of a shutter lock member 25 disposed in the cartridge main body 4 is protruded. The locked piece 27 is connected to the shutter member 1.
1 is attached to the cartridge main body 4 and engages with the lock portion 26 of the shutter lock member 25 when the information signal reproducing opening 9 formed in the cartridge main body 4 is in a closed position where the opening is closed. The shutter member 11 is held at the opening closing position.

Further, the shutter portion 1 of the rising piece 17
As shown in FIGS. 4 and 7, a pair of inner side surfaces 5 extending from the upper surface of the shutter slide guide wall 13 are inserted into the shutter opening operation pin insertion groove 12 and extend on the upper end surface of the shutter slide guide wall 13. The slide guide protruding pieces 28 are protruded.

The shutter member 11 configured as described above
To attach the cartridge to the cartridge body 4, the shutter 15
Are extended over the information signal reproducing opening 6, and the supporting projection 18 is made to face the outer surface of the lower half 3, and a pair of outer engagements formed on the tip side of the supporting projection 18. The projecting pieces 20 are engaged with the outer slide guide grooves 19. Further, the insertion piece 22 is inserted into the shutter opening operation pin insertion groove 12, and the inner engagement ridge 24 formed on the distal end side of the insertion piece 22 is inserted into the inner slide guide groove 23 formed on the inner surface of the upper half 2. Engage. In this manner, the pair of outer engagement projections 20 are connected to the outer slide guide grooves 19.
As shown in FIG. 4, the shutter member 11 engages with the slide guide portion 16 by engaging the inner engagement ridge 24 with the inner slide guide groove 23.
Thus, the lower half 3 is attached to the cartridge body 4 so as to hold the front side thereof.

At this time, a pair of slide guide projections 2
Reference numerals 8 and 28 extend to the upper end surface of the shutter slide guide wall 13.

The shutter member 11 attached to the cartridge body 4 in this manner includes a pair of outer engagement projections 20,2.
2 and FIG. 2 show directions in which the information signal reproducing opening 6 is opened and closed by being guided by the outer slide guide groove 19 in which the information signal reproducing aperture 19 is engaged and the inner slide guide groove 23 in which the inner engaging ridge 24 is engaged. 3. It is slidable in the directions of arrow A and arrow B in the middle.

When the shutter member 11 attached to the cartridge body 4 as described above is moved to the position where the information signal reproducing opening 6 is closed, the locked member 27 is closed.
Is locked by engaging with the lock portion 26 of the shutter lock member 25, and is held at the position where the information signal reproducing opening 6 is closed as shown in FIG.

The slide guide 16 of the shutter member 11 has a pin engagement hole 29 for shutter closing operation.
Are drilled. The pin engaging hole 29 is provided in the recording / reproducing apparatus for operating the shutter member 11 at the position where the information signal reproducing opening 6 is opened toward the closing position when the disk cartridge is mounted on the cartridge mounting portion of the recording / reproducing apparatus. The shutter closing operation pin disposed on the side engages.

The disc cartridge in which the shutter member 11 is held at the position where the information signal reproducing opening 6 is closed is recorded with one side facing the opening end 12a of the shutter opening operation pin insertion groove 12 as the insertion end. When inserted into the cartridge mounting portion of the reproducing apparatus, the shutter opening pin arranged on the recording / reproducing apparatus side enters the shutter opening operation pit insertion groove 12. When the disc cartridge is further inserted into the cartridge mounting portion, the shutter lock member 25 is elastically displaced inward of the cartridge main body 4 by the shutter release pin, and the lock of the locked piece 27 to the shutter lock member 25 is released. Then, the shutter member 11 is in a state where it can slide freely.
When the disc cartridge is further inserted into the cartridge mounting portion from here, the shutter member 11 is pressed by the shutter release pin, and is slid in the direction of the arrow A in FIGS. 2 and 3 for opening the information signal reproducing opening 6. As shown in FIG. 5, the information signal reproducing opening 6 is opened.

When the disc cartridge mounted in the cartridge mounting portion of the recording / reproducing apparatus with the information signal reproducing opening 6 opened is operated, the pin engaging hole 29 for shutter closing operation is inserted into the pin engaging hole 29. The shutter member 11 with the shutter closing operation pin engaged is moved relative to the cartridge body 4 which is moved to the outside of the cartridge mounting portion, and the direction in which the information signal reproducing opening 6 is closed is shown in FIGS. It is slid in the direction of arrow B to close the information signal reproducing opening 6 as shown in FIG.

In the above embodiment, the inner slide guide groove 23 is formed by piercing the inner surface of the upper half 2, but the thickness of the upper half 2 is not sufficient and the inner slide guide groove 23 is not formed. In the case where the depth of the inner slide guide 23 is not sufficiently ensured, a pair of parallel ridges 30a, 30b is provided on the inner surface of the upper half 2 as shown in FIG. The groove 23 may be formed.

In the above-described embodiment, the shutter member 11 is formed of a synthetic resin molded body. However, the shutter member 11 may be formed by punching and bending a thin metal plate such as a stainless steel plate.

The shutter member 11 formed by using this metal plate is formed by bending as shown in FIGS. 9 and 10, and a pair of slide guide projections forming a first engagement portion. The pieces 20 and 20 are formed by projecting a pair of projecting pieces on one side edge of the supporting projecting piece 18 and bending these projecting pieces inward. Also, an inner side ridge 2 forming a second engagement portion.
4 is formed by bending the distal end side of the insertion piece 22 outward.

Further, in the shutter member 11 formed by using this metal plate, the shutter member 11 extends on the slide guide wall 13 provided on the cartridge body 4 side inside the rising piece 17 constituting the slide guide portion 16. It is difficult to form the existing slide guide projection 28. Therefore, as shown in FIGS. 9 and 10, the slide guide projection 28 is formed by projecting a pair of projections on the other side edge side of the rising piece 17 and bending these projections. .

The locked piece 27 to be engaged with the shutter lock member 25 is also formed by bending a protruding piece protruding from the other side edge of the rising piece 17.

The shutter member 11 formed using this metal plate is also attached to the cartridge body 4 in the same manner as the one formed using the synthetic resin. That is, the shutter portion 15 is extended over the information signal reproducing opening 9, and the support projection 18 is made to face the outer side of the lower half 3, and is formed on the tip end side of the support projection 18. The pair of outer engaging projections 20, 20 are
To be engaged. Further, the insertion piece 22 is inserted into the shutter opening operation pin insertion groove 12, and the inner engagement ridge 24 formed on the distal end side of the insertion piece 22 is inserted into the inner slide guide groove 23 formed on the inner surface of the upper half 2. Engage. At this time, the slide guide projecting pieces 28 are extended on the upper end surface of the shutter slide guide wall 13.

As described above, the pair of outer engagement projections 20, 20
The metal shutter member 11 attached to the cartridge body 4 by engaging the inner engagement ridge 24 with the inner slide guide groove 23 while engaging the Similarly, as shown in FIG. 11, the lower half 3 is attached to the cartridge main body 4 so that the front side of the lower half 3 is sandwiched by the slide guide portion 16.

The metal shutter member 11
Also, the information signal reproducing opening 6 is opened and closed by the shutter unit 15 so as to be slidable with respect to the cartridge body 4.

As described above, the pair of outer engaging projections 20,
20 is engaged with the outer slide guide groove 19,
The shutter member 11 which is attached to the cartridge body 4 by engaging the inner engagement ridge 24 with the inner slide guide groove 23 is such that the shutter portion 15 is separated from the main surface of the cartridge body 4 in FIG. Even if a turning force in the direction of arrow Y in FIG.
Are supported by the inner slide guide groove 23 formed on the inner surface of the upper half 2, and the cartridge body 4
Maintain a state of being in close contact with the main surface. Therefore, the shutter member 11 can securely close the information signal reproducing opening 6 by the shutter portion 15. Further, since the state in which the shutter portion 15 is in close contact with the main surface of the cartridge body 4 is maintained, the shutter member 11 can be slid in a stable state.

Further, even when an external force such as a drop impact is applied to the cartridge body 4, the outer engagement projections 20, 20 and the inner engagement projection strip 24 are respectively formed in the outer slide guide groove 19 and the inner slide guide groove 23. Since the rotation of the engaged shutter member 11 in the direction indicated by the arrow Y in FIG. 4 is restricted as described above, it is easy to prevent the shutter member 11 from dropping off from the cartridge body 4 and securely attached to the cartridge body 4. Maintain state.

In the above embodiment, the shutter member 11 has only the portion facing the outside of the cartridge body 4 on the lower half 3 side, and does not cover the upper half 2 side. As described above, the upper surface of the cartridge body 4 can be widely opened as a label sticking surface.

In the above-described embodiment, the disk cartridge to which the so-called one-sided type shutter member 11 having only the shutter portion 15 for opening and closing the information signal reproducing opening 6 formed on only one main surface of the cartridge body 4 is mounted. In the present invention, as shown in FIGS. 12, 13 and 14, a cartridge body 4 such as a disk cartridge containing a magneto-optical disk 31 capable of re-recording an information signal is provided. A so-called double-sided shutter member having information signal recording / reproducing openings 32, 33 formed on both opposing main surfaces thereof and a pair of shutter portions 42, 43 for opening and closing these openings 32, 33, respectively. 41 can also be applied.

The shutter member 41 applied to this disk cartridge is formed by punching and bending a thin metal plate, and is formed on both main surfaces of the cartridge body 4 as shown in FIG. A pair of shutter portions 42, 43 for closing the information signal recording / reproducing openings 32, 33, respectively, is connected to the base end sides thereof, and a slide guide portion 44 constituting a mounting portion to the cartridge body 4 is provided. It is formed in a U-shape.

The slide guide portion 44 is formed to be longer than the width of the shutter portions 42 and 43, and has both ends formed to project from both sides of the shutter portions 42 and 43. At both ends of a connecting piece 45 for connecting the shutter portions 42 and 43 of the slide guide portion 44, a first portion which is partially held on the front side of the cartridge body 4 is provided.
And second half holding portions 46 and 47 are formed, respectively. These first and second half holding portions 46, 47
The height H corresponding approximately to the height D ₂ of the front side of the lower half 3
_It is bent so as to have a U-shaped cross section having ₂ .

Then, the first and second half holding portions 4
Outer slides formed on the outer surface side of the lower half 3 are provided at the tips of the supporting projections 48, 49 extending on the outer surface side of the lower half 3 bent on one side of the lower half 3, 6 Guide groove 1
9 to guide the direction of movement of the shutter member 41 and the cartridge body 4 of the shutter member 41.
Outer engagement projections 50 and 51 constituting a first engagement portion for preventing the first engagement portion from coming off are bent.

On the other end of the first half holding portion 46, a shutter member 41 is attached to the cartridge main body 4.
When it is mounted on the cartridge body 4, it is inserted into the shutter opening operation pin insertion groove 12 formed on the front side of the cartridge body 4, and is engaged with the shutter lock member 25 disposed in the cartridge body 4. The piece 52 is bent.

Further, on one side of the first and second half holding portions 46 and 47, insertion pieces 53 and 5 inserted into the shutter opening operation pin insertion groove 12 of the cartridge body 4 are provided.
4 is bent, and an inner engaging portion that forms a second engaging portion that engages with the inner slide guide groove 23 formed on the inner surface of the upper half 2 is formed on the distal end side of the insertion pieces 53 and 54. The protruding pieces 55 and 56 are formed upright.

The shutter member 41 constructed as described above
13 and 14, each shutter unit 4
The cartridges 2 and 43 are fitted from the front side of the cartridge body 4 so as to extend over the information signal recording / reproducing openings 32 and 33. At this time, the outer engagement projections 50 and 51 constituting the first and second half holding portions 46 and 47 are engaged with the outer slide guide grooves 19 and the insertion
3 and 54 are inserted into the shutter opening operation pin insertion groove 42, and the inner engaging projections 55 and 56 of these insertion pieces 53 and 54 are inserted.
Engage with the inner slide guide groove 23 formed on the inner surface of the upper half 2.

The engaged piece 52 formed by bending the first half holding portion 45 projects into the shutter opening operation pin insertion groove 12 so as to be able to relatively engage with the shutter lock member 25. Become.

As described above, the first and second half holders 4
6 and 47, the shutter member 4 fitted to the cartridge body 4 so as to clamp the front side of the lower half 3.
As shown in FIG. 13 and FIG.
The outer slide guide groove 19 in which 0, 51 is engaged and the inner slide guide groove 2 in which the inner engagement projections 55, 56 are engaged.
3 slides between an opening closing position where the information signal recording / reproducing openings 32 and 33 are closed and an opening opening position where the information signal recording / reproducing openings 32 and 33 are opened. It is attached to the cartridge body 4 as possible.

In the disk cartridge constructed as described above, the shutter member 41 further includes the outer engagement projections 50 and 51 and the inner engagement projections 55 and 55 in the outer slide guide groove 19 and the inner slide guide groove 23. Since the disc cartridge is attached to the cartridge main body 4 in engagement with each other, even if an external force such as a drop impact is applied to this disc cartridge and the cartridge main body 4 is deformed, the outer engaging projections 50, 51 and Inner engaging projection 5
Either 5 or 56 maintains the state of being engaged with the outer slide guide groove 19 or the inner slide guide groove 23. Therefore, the shutter member 41 is prevented from easily falling off the cartridge main body 4, and the state in which the shutter member 41 is securely attached to the cartridge main body 4 is maintained.

In each of the embodiments described above, an example is described in which a magneto-optical disk or an optical disk is housed as a disk-shaped recording medium housed in the cartridge body. However, the present invention relates to a disk on which other information signals are recorded. Can be applied to a disk cartridge for storing the same.

[0067]

As described above, in the disk cartridge according to the present invention, the shutter member is located at the end of the cartridge main body rather than the opening at one of the outer surfaces of the upper and lower halves constituting the cartridge main body. The first engagement groove is engaged with the first engagement groove formed on the side, and the first engagement groove is inserted between the opposed inner surfaces of the upper and lower halves and is formed on one of the other inner surfaces of the upper and lower halves. By engaging the second engagement portion with the second engagement groove, the cartridge is prevented from coming off from the cartridge main body and is attached to the cartridge main body, and is slid in the sliding direction by the first and second engagement grooves. Are guided and movable in the direction of opening and closing the opening formed in the cartridge main body, and are attached to the shutter for opening and closing the opening. Even if a rotating force is applied so as to be separated from the surface, the rotation is regulated by the second engaging portion that engages with the inner surface of one of the upper and lower halves, and the main portion of the cartridge body of the shutter portion is Maintain a firm contact with the surface. Therefore, in the shutter member, the opening of the cartridge body can be securely sealed by the shutter portion. Further, since the state in which the shutter portion is in close contact with the main surface of the cartridge body is maintained, the shutter member can be slid in a stable state.

Further, even if an external force such as a drop impact is applied to the cartridge main body and the cartridge main body is deformed, either one of the first and second engaging portions is not connected to the first or second engaging portion.
Since the state in which the shutter member is engaged with the engagement groove is maintained, the shutter member is prevented from easily falling off the cartridge body,
The state of being securely attached to the cartridge body is maintained. In addition, when the shutter member is moved in the direction to open and close the opening, the pair of slide guide pieces slide on the upper end surface of the half-side shutter slide guide wall, so that more stable slide is realized. You.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk cartridge according to the present invention with a shutter member removed.

FIG. 2 is a perspective view showing an upper main surface of the disk cartridge.

FIG. 3 is a perspective view showing a lower main surface of the disk cartridge.

FIG. 4 is a partial sectional view showing a mounting state of a shutter member of the disk cartridge.

FIG. 5 is a perspective view of the disc cartridge showing a state where a shutter member has been moved to an opening opening position.

FIG. 6 is a perspective view showing a synthetic resin shutter member used for the disk cartridge.

FIG. 7 is a bottom view of the synthetic resin shutter member.

FIG. 8 is a partial sectional view showing another example of the inner slide guide groove formed in the upper half.

FIG. 9 is a perspective view showing a metal shutter member applied to the present invention.

FIG. 10 is a bottom view of the metal shutter member.

FIG. 11 is a partial cross-sectional view showing a state in which the metal shutter member is attached to a cartridge body.

FIG. 12 is a perspective view showing an example in which the present invention is applied to a disk cartridge having an information signal recording / reproducing opening on both sides of a cartridge body, with a shutter member removed.

FIG. 13 is a perspective view showing an upper main surface of the disk cartridge.

FIG. 14 is a perspective view showing a lower main surface of the disk cartridge.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 optical disk, 4 cartridge body, 6 information signal reproducing opening, 11 shutter member, 12 shutter opening pin insertion groove, 15 shutter portion, 16 slide guide portion, 19 outer slide guide groove as first engagement groove, 20 Outer engagement projections as first engagement portions, 23
Inner slide guide groove as second engagement groove, 24 Inner engagement projection as second engagement portion

Claims (1)

(57) [Claims] An upper half and a lower half having a square shape are formed by butt-joining, and a disc-shaped recording medium is rotatably accommodated in the disc-shaped recording medium. over and to comprise a cartridge body which is formed on at least one principal opening to let exposed to outside, and a shutter member for opening and closing the opening is mounted slidably on the cartridge body, the shutter member, the Shutter for closing the opening
And a slide guide portion that is long with respect to the width of the shutter portion.
And the rising piece
Has a first engagement portion that engages with a first engagement groove formed on the end side of the cartridge body with respect to the opening on one of the outer main surfaces of the upper and lower halves. A second engaging member which is inserted between the opposing inner main surfaces of the upper and lower halves and engages with a second engaging groove formed on one of the other inner main surfaces of the upper and lower halves. Joint part and above
Between the opposite main surfaces of the lower half and the lower half.
And rises from the half where the first engagement groove is formed.
On the upper end of the shutter slide guide wall
A disk cartridge having a pair of extending slide guide pieces .