JPH07176162A - Disk cartridge - Google Patents

Abstract

PURPOSE:To obtain an inexpensive disk cartridge housing a disklike information recording medium. CONSTITUTION:A cartridge housing 2 which is constituted of halves 3a and 3b and which houses a disk 1 is provided with an aperture part 4a and a groove 6a. When a cover is attached, the disk 1 is pressed by disk pressers 7a and 7b. Therefore, since the structure of the cartridge where the cover is attached is hermetically sealed, dust or a foreign matter does not enter from the outside and the cartridge becomes inexpensive and high reliable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge applicable to a disc device for reproducing or recording / reproducing a disc contained in a cartridge.

[0002]

2. Description of the Related Art At present, a disk-shaped recording medium such as an optical disk is vulnerable to dust, scratches and the like as the recording density is improved, and there is an increasing need to protect the recording surface. Therefore, loading, recording, reproduction, storage, etc. are often performed while the recording medium is contained in a cartridge made of plastic or the like.

Many of the cartridges store a disk in a housing having an opening through which the surface of the disk is viewed, and when the disk dislikes dust, the opening is covered with a shutter.
This shutter is opened at the time of loading, and the recording / reproducing head performs recording / reproducing on the disc through the opening.

A conventional cartridge of this type is shown in FIG. 1 as disclosed in, for example, Japanese Unexamined Patent Publication No. 61-236083.
It is configured as 1.

Reference numeral 51 is a disk, 52 is a cartridge housing for rotatably housing the disk 51, and the upper half 5
3a and the lower half 53b are formed into a substantially rectangular parallelepiped. Each of the upper half 53a and the lower half 53b is provided with a motor opening hole 54 for inserting a motor, a head opening hole 55 for inserting a head, and a recess 56 into which a shutter can be inserted so as to face each other. There is. 60
Is a shutter that is inserted into the recess 56 to open and close the motor opening 54 and the head opening 55.
The projection piece 61 is inserted into the guide groove 57 provided in
It is configured to be movable in the recesses 56 in the directions of arrows K and L.

Reference numeral 62 designates a claw formed on the shutter 60, which can be inserted into a slot-like opening 58 formed when the upper half 53a and the lower half 53b are overlapped. Reference numeral 63 denotes a flexible slider that moves the shutter 60 by moving inside the cartridge housing 52, and the claw 62 of the shutter 60 is inserted in the center thereof. The protrusion 65 of the slider 63 is configured to be exposed to the outside through an opening groove 59 formed on the side surface of the cartridge housing 52. Therefore, when the external member is inserted into the opening groove 59, the protrusion 65 comes into contact with the external member and the slider 63 moves in the arrow M direction.

On the other hand, a tension spring is extendably arranged in the space between the slider 63 and the cartridge housing 52.
One end of the slider 63 is locked to the center of the slider 63, and the other end is locked to the cartridge housing 52. When the external member is disengaged from the protrusion 65, the slider 63 moves in the direction of arrow N by the urging force of the tension spring. It is moved and returned to its original state.

[0008]

However, in the conventional structure as described above, the structure of the cartridge becomes very complicated. Therefore, since the number of constituent parts is large and the assembly of the cartridge is difficult, there is a problem that the entire disk including the cartridge becomes expensive. Further, since the shutter moves on the surface of the cartridge housing, there is a limit to the size of the shutter. Therefore, the size of the opening hole covered by the shutter is limited,
It was not possible to provide a very large opening hole.

In view of the above problems, the present invention has a simple structure,
It is intended to provide a disk cartridge which is inexpensive, highly resistant to dust and the like, and highly reliable.

[0010]

In order to solve the above-mentioned problems, a disk cartridge according to a first aspect of the present invention has an opening in which a disk is rotatably housed and a recording / reproducing head or a disk motor can be inserted. At least a cartridge housing provided on at least one side and a cover that is mounted on the outer surface of the cartridge housing from both sides and covers at least the opening, and presses and holds the vicinity of the center of the disk. Disc cartridge.

According to a second aspect of the present invention, the disc cartridge of the first aspect has a central hole formed therein, and the disc pressing member of the cover is attached to the outer surface of the cartridge case to prevent A disk cartridge configured to engage with a central hole and hold a disk.

A disk cartridge according to a third aspect of the present invention is a disk cartridge in which a cover of the disk cartridge is integrally formed with a cartridge case that covers substantially the entire cartridge housing.

According to a fourth aspect of the present invention, there is provided a disc cartridge having a notch portion penetrating from one end of the opening portion of the third aspect of the present invention to a side surface portion of the cartridge casing at a width of the opening portion; A disk cartridge provided with a box-shaped cartridge case having an insertion opening into which a housing can be inserted, and a cover formed inside the cartridge case for covering the opening and the notch.

According to a fifth aspect of the present invention, there is provided a disc holding member elastically supported to hold a disc on a part of a wall surface of a disc housing portion of the cartridge housing of the third aspect of the present invention. An abutting member that can come into contact with the disc holding member is provided in the case, and the disc holding member moves in contact with the abutting member by holding the disc while the cartridge housing is housed in the cartridge case. It is a disk cartridge configured.

According to a sixth aspect of the present invention, there is provided a disc cartridge in which a suction plate containing a magnetic material is provided inside a cartridge casing of the disc cartridge, and the suction plate is attracted by a magnetic member provided on the cover to cover the outer surface of the cartridge casing. It is a disk cartridge configured to be fixed on the top.

According to a seventh aspect of the present invention, there is provided a disk cartridge cartridge housing, which has a guide surface which is in contact with the cartridge shutter opening / closing mechanism of the disk device and is movable in the cartridge shutter opening / closing mechanism.
A disk cartridge configured to cover at least a part of a guide surface and prevent movement of a cartridge shutter opening / closing mechanism in a state where a cover is attached to a cartridge housing.

[0017]

According to the present invention, since the shutter of the cartridge and the shutter opening / closing mechanism of the disk device are not required by the above structure, the structure of the cartridge and the disk device is simplified and the cost of the cartridge is significantly reduced. .

While the disc is still in the cartridge, it is held by hand and inserted into the apparatus for loading, recording and reproducing, so that the disc is prevented from being greasy or scratched during handling. Also, when leaving and storing, the cover covers the entire opening of the cartridge,
The inner disk can be sealed and can be protected from dust and dirt. Therefore, the structure is such that all the functions of the conventional cartridge are satisfied.

Since the cover is attached and detached instead of moving on the cartridge, the size of the cover is not limited. Therefore, there is no limitation on the size of the opening covered by the cover, and the opening having any shape and size can be formed.

Further, this cartridge can be inserted and driven into a disk device which is assumed to be a conventional cartridge with a shutter.

Since the cover mounted on the cartridge is attached and detached by hand, the cover does not have to have a high dimensional accuracy. For example, it is made of plastic and can be manufactured by integral molding. Compared with the conventional structure of a metal shutter, a spring member, etc., the manufacturing cost is overwhelmingly low. Mounted on the cartridge,
For fixing, the cover is made of, for example, an elastically deformable material, and is elastically fixed to the cartridge.

Further, the cover holds the disc in the cartridge near the central portion, so that it is possible to prevent the disc from vibrating and being damaged during the transport of the disc.

A disk holding member having a tapered peripheral surface is inserted in the center hole of the disk, and upper and lower covers are connected to each other with the taper surface fitted in the center hole to hold the disk between them. Then, since it can be fixed in the center hole of the disc, the disc can be fixed at an accurate position, and contact with the cartridge due to vibration can be further reduced. Further, since the upper and lower covers are fixed by being connected, the disc can be firmly held.

[0024] The entire cartridge, soft, thin paper,
It is possible to put it in a cartridge case made of plastic or the like. In that case, cover the opening
When the cover is integrally formed inside the cartridge case, the opening can be sealed by the cover, the loss of the cover can be avoided, and the cover can be attached / detached together with the attachment / detachment of the cartridge case, so that the operability is enhanced.

A disk holding member that is elastically supported to hold a disk is arranged in the cartridge case, and an abutting member that can contact the disk holding member is arranged in the cartridge case, and the cartridge case is the cartridge case. When the disk holding member is brought into contact with the abutting member and moved to hold the disk in the state stored in the disk, the disk is fixed in the cartridge housing in the storage state, and the disk is held in the cartridge during transportation. It is possible to prevent the disc from vibrating and being damaged.

When considering a cartridge in which a suction plate for disc clamping is provided inside the cartridge, a magnet member is provided in a part of the cover, and a suction force is generated between the suction plate which is a magnetic body and this magnet member. Thus, the cover can be fixed to the cartridge, and the mounting of the cover becomes easier. Further, by sandwiching the internal disk by utilizing this suction force, vibration of the disk can be prevented.

If the cover is mounted and is accidentally inserted into the device, the optical head of the disk device may be damaged or the disk device system may malfunction. By preventing the cartridge from being inserted into the disk device with the cover attached, this can be avoided and proper reproduction or recording / reproduction can be performed.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk cartridge according to an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1, 2 and 3 are external perspective views of a disk cartridge according to the first embodiment of the present invention, and FIG. 4 is a sectional view showing the internal structure of the disk cartridge according to the first embodiment of the present invention. is there.

In FIGS. 1 to 3, 1 is a disc, 2 is a cartridge housing for rotatably accommodating the disc 1, and is formed into a substantially rectangular parallelepiped by an upper half 3a and a lower half 3b. Each of the upper half 3a and the lower half 3b is provided with an opening 4a for inserting a disk clamper (not shown) and an opening 4b for inserting a motor and a head so as to face each other. 5 is the opening 4
It is a cover for covering a and 4b. 1 and 2 are perspective views of the cartridge housing viewed from above and below, and FIG. 3 is a perspective view of the cartridge housing viewed from above when the cover 5 is mounted on the cartridge housing.

The upper half 3a is provided with an opening 4a and an upper groove 6a at a position where the cover 5 is mounted. The lower half 3b is provided with an opening 4b, a notch 8 penetrating from one end of the opening 4b to a side surface of the lower half 3b with a width of the opening 4b, and a lower groove 6b at a position where the cover 5 is mounted. Has been. Further, an opening 6c capable of engaging with a protrusion 9 of the cover 5 described later is provided in a part of the lower groove 6b. The notch 8 is provided so that the head of the disk device does not come into contact with the cartridge housing 2. The cover 5 is provided with an upper disc holder 7a, a lower disc holder 7b, and a protrusion 9.

When the cartridge housing 2 is inserted into the disk device (not shown), the disk clamper and the motor are respectively inserted through the openings 4a and 4b to hold the disk,
To drive. The head is inserted through the opening 4b to record / reproduce signals on / from the disc 1. Therefore, while the disc remains in the cartridge, it can be held by hand and inserted into the device for loading, recording and reproducing, which prevents the disc from being greased or scratched during handling.

Since the disk 1 of the cartridge taken out from the disk device is exposed through the openings 4a and 4b, if left unattended, external dust and dirt will adhere to the surface of the cartridge. is there. Therefore, the opening 4
The covers a and 4b are covered with the cover 5 to be stored and stored. Since the upper groove 6a and the lower groove 6b are provided in the state where the cover is mounted, as shown in FIG. 3, the upper half 3a and the lower half 3b are at the same height as the respective surfaces, and the thickness of the entire cartridge increases. It has a structure that makes it easy to make up the surface, wrap it, and store it.

The internal structure of the disk cartridge is shown in FIG.
Described in. In FIG. 4, the upper half 3a and the lower half 3
b is a sectional view, and the cover 5 is a side view.
The cover 5 is provided with an upper disc holder 7a and a lower disc holder 7b. The cover 5 is made of an elastic material such as resin, and as can be seen from the sectional view,
It is roughly U-shaped. When both sides of the U-shape are opened to the outside as shown in (b), elastic force acts to close the inside.

The cover mounting operation will be described with reference to FIG.
(A) shows the state before the cover 5 is attached, (b) shows the state during the attachment, and (c) shows the state where the cover is finished. When the mounting of the cover 5 is started, the upper disc holder 7a slides on the surface of the upper groove 6a and moves. On the lower side, the projection 9 rides on the surface of the lower groove 6b, and the lower disc holder 7b is pushed down to a position where it does not contact the disc 1 and is inserted as it is.
When the insertion is completed in (c), the projection 9 is formed into the opening 6 of the lower groove 6b.
c, and as a result, the lower disc retainer 7b enters the cartridge housing 2. At that time, the upper disc holder 7a also enters the opening 4a. Therefore, the area near the center of the disk 1 is sandwiched between the disk holders 7a and 7b,
The elastic force of the cover 5 presses the disc 1 so as not to move,
Hold and fix. In this state, the cover 5 has the upper groove 6
Since the surface of the lower groove 6b and the inner surface of the lower groove 6b do not enter further, it is possible to prevent the cover 5 from coming into contact with the surface of the disc 1. Further, since the projection 9 of the cover 5 is engaged with the opening 6c, the cover 5 is fixed and held on the cartridge, so that it does not easily come off. Since the disc holders 7a and 7b have a step that is slightly larger on the outer circumference, it is possible to completely prevent dust and the like from entering the inside of the cartridge.

As shown in the figure, the cover 5 can be manufactured by integral molding of a plastic capable of covering the openings on both sides of the cartridge with a single component, and since it is removed when it is inserted into the disk device, the dimensional accuracy is not so high. do not need. Therefore, it can be made much cheaper than a conventional shutter that is inserted into the disk device while sliding on the surface of the cartridge. Further, when the disc is transported, the disc fixing means is required so that the disc does not vibrate inside the cartridge and come into contact with the inside of the cartridge to be scratched. However, since the cover of the present invention also has the function, The configuration can be further simplified and the cost can be reduced.

When the disc is a disc which can be used on both sides, and when the disc is used by inserting the disc by replacing the upper and lower sides,
Both the upper half 3a and the lower half 3b are provided with an opening 4b for inserting a motor and a head and a notch 8 facing each other. The opening 4b is large enough to insert the disc clamper. The cover for covering the upper and lower openings is different from the cover 5 in FIG. 4 in that the lower half of the cover 5 provided with the projection 9 is vertically symmetrical. The present invention can be applied to a disk cartridge that can be used on both sides by using the cover having such a structure.

The opening need not be circular or oval as shown in the figure regardless of whether one side or both sides are used.
Any shape is possible. The size of the cartridge may be half the area of the cartridge, if necessary. In that case, the cover may be enlarged according to the opening. Since the cover is attached and detached instead of moving on the cartridge, the size of the cover is not limited. Therefore, there is no limitation on the size of the opening covered by the cover, and the opening having any shape and size can be formed. By widening the opening, the configurations of the disk clamper, the motor, and the head to be inserted can be freely set, and for example, it is possible to insert a plurality of heads at the same time.

FIG. 5 shows the second embodiment of the present invention.
FIG. 3 is a side view showing the internal structure of the disc cartridge.
In the figure, (a) shows a side view of the cover 5, and (b) shows a sectional view of the state where the cover 5 is attached to the cartridge housing.
The cartridge housings 3a and 3b are sectional views. 10a,
Reference numeral 10b is a disc pressing member that engages with the central hole 12 of the disc 1 and holds the disc 1. The peripheral surface of 10a is tapered.

The procedure for mounting the cover will be described with reference to FIG. With the cover 5 opened as shown in the figure, the cartridge housing is sandwiched, and the disk retainer 7b is inserted into the opening of the cartridge. At that time, the disc pressing member 10a enters the center hole 12, and the tapered surface of the peripheral surface fits into the center hole. The disc retainer 7b contacts the lower surface of the disc 1. At that time, the disc pressing members 10a and 10b are connected.
Therefore, the disc retainer 7b and the disc retainer member 10
The disk 1 is sandwiched and held by "a".

With this structure, the center hole 1 of the disk 1
Since it can be fixed at 2, the disk 1 can be fixed at an accurate position, and the contact with the cartridge due to vibration can be further reduced. Further, since the disc pressing members 10a and 10b are fixed by engagement, the disc can be held more firmly than when the disc is held by the elastic force of the cover 5.

FIG. 6 is an external perspective view of a disk cartridge according to the third embodiment of the present invention. In the figure,
Disk 21 that can be used on both sides in the cartridge housing 22
Is stored. The upper half 23a is provided with an opening 24a for inserting a motor and a head, and a notch 25a penetrating from one end of the opening 24a to the side surface of the upper half 23a with the width of the opening 24a. . The lower half 23b also has a similar opening 24b and cutout 2
5b is provided. The recessed portion 2 is formed in the cutout portion 25a.
6 is formed. A disk holding member 28 elastically supported so as to be able to contact the disk 21 is provided on a wall surface portion 27 of the disk housing portion of the cartridge housing 22. The disc holding member 28 is held at the same circumferential position as the wall surface portion 27. An opening hole 29 is formed in the side wall surface of the cartridge housing 22 on the side of the cutout portions 25a and 25b. Reference numeral 30 denotes a box-shaped cartridge case having an insertion opening into which the cartridge housing 22 can be inserted,
Reference numerals 31 and 32 denote inner covers of the case. Case inner cover 3
1 has a shape that covers the opening 24a and the notch 25a, and the case inner cover 32 has a similar shape. The in-case cover 31 engages with the recessed portion 26 of the cartridge housing 22 to attach the cartridge case 30 to the cartridge housing 22.
A protruding portion 33 that is fixed to is formed. A contact member 34 is fixed to the inner side wall surface of the cartridge case 30. When the cartridge housing 22 is housed in the cartridge case 30, the contact member 34 is inserted into the opening hole 29 of the cartridge housing 22, contacts the disk holding member 28, and contacts the disk holding member 28 with the disk 21. It is arranged so that it can be moved up to.

The procedure for mounting the cartridge case will be described with reference to FIG. Cartridge case 2 in the cartridge case 30
When 2 is inserted, the case inner covers 31 and 32 are slid and inserted into the cutouts 25a and 25b and the openings 24a and 24b. When the cartridge housing 22 is inserted to the storage position of the cartridge case 30, the contact member 34 of the cartridge case 30 contacts the disk holding member 28 of the cartridge housing, and the disk holding member 28 is moved to the position where it contacts the disk 21. , Disk 2
Hold 1 fixed. At this time, the recess 26 of the cartridge housing 22 and the protrusion 33 of the cartridge case are engaged with each other to hold the cartridge housing 22 in the cartridge case 30.

When the cover is integrally formed with the cartridge case as in this embodiment, the groove for guiding the cover to the cartridge case is unnecessary, the structure of the cartridge case is further simplified, and the cartridge case is formed. The cover is comfortably attached during the process of inserting into the.

Since the cover is integrated with the case, the case for protecting the entire surface of the cartridge and the cover for shielding the disc from dust can be attached in one operation, which makes the handling operation extremely easy. It will be easier. Moreover, it is possible to avoid losing the cover. The cover and case can be manufactured at the same time by integrally molding with plastic, and the price can be reduced.

Further, the fixing of the disc can be released by the operation of attaching and detaching the cartridge to the case, so that the disc can be surely protected with a very simple structure.

As the second embodiment, the cover 5 shown in FIG. 5 may be integrated with the cartridge case as in the third embodiment. In this case, the cover 5 is opened together with the cartridge case as shown in FIG. 5A, and the cartridge housing is sandwiched. At that time, the disk pressing member is connected to hold the disk. Alternatively, as another configuration, the cartridge case has a box shape as shown in FIG.
Only the cover portion is opened as shown in FIG. 5A, the cartridge housing is inserted into the case, and then only the cover is closed to sandwich the cartridge housing and hold the disc. Also in this case, the effect that the cover and the case are integrated can be obtained.

FIG. 7 is a sectional view showing the internal structure of a disk cartridge according to the fourth embodiment of the present invention, and FIG.
It is an appearance perspective view of a cover. In the figure, a suction plate 35 containing a magnetic material is provided inside the upper half 3a of the cartridge housing, and a magnet member 36 is provided on the cover 5. Further, the cover mounting hole 37 is provided in the upper half 3a, and the cover 5
A cover hook 38 is provided on the.

FIG. 7A shows an enlarged view of the cartridge housing 2 with the cover 5 attached, FIG. 7B shows only the cover 5 and FIG. 7C shows an enlarged view of the attached state.

The procedure for mounting the cover 5 will be described with reference to FIGS. Hook the cover hook 38 on the cover mounting hole 37,
When the disc retainer 7b is pressed to the lower side of the cartridge as it is, the disc retainer 7b enters the cartridge, and the magnet member 36 at the center of the disc retainer 7b is inserted into the center hole 12 of the disc 1.
Then, it comes close to the suction plate 35 and is attracted by magnetic force. As a result, the cover 5 is fixed to the cartridge housing 2, and the mounting of the cover is completed.

In this configuration, a cartridge provided with a suction plate is considered, and it is not possible to sandwich the cartridge from both sides of the cartridge. However, even in that case, the cover can be fixed to the cartridge and a strong magnetic force can be secured. You can Moreover, by virtue of the magnetic force sandwiching the vicinity of the central portion of the disk 1 by the disk holder 7b and the suction plate 35, the disk vibration can be prevented.

FIG. 9 is an external perspective view of a disk cartridge according to the fifth embodiment of the present invention, and FIG. 10 is a plan view showing the state of the disk cartridge mounted in the disk device. In the figure, a guide surface 39 is formed on the side surface of the cartridge housing 2 so as to come into contact with the cartridge shutter opening / closing mechanism 40 of the disk device. When the cover 5 is attached to the cartridge housing 2, a part of the guide surface 39 is covered with the cover 5.

Cartridge housing 2 without cover 5
10 is inserted into the cartridge holder 41 of the disk device, as shown in FIG. 10A, the cartridge shutter opening / closing mechanism 40 contacts the guide surface 39 of the cartridge housing 2 and moves on the guide surface 39 to the mounting completion position. . Therefore, the cartridge housing is mounted at a predetermined position in the disk device, and recording / reproduction is possible.

When the cartridge housing 2 with the cover 5 attached is inserted into the cartridge holder 41 of the disk device, as shown in FIG. 10B, the cartridge shutter opening / closing mechanism 40 initially moves the guide surface 3 of the cartridge housing 2.
9 and moves on the guide surface 39, but eventually the cover 5
, And further movement is blocked. Therefore, the cartridge housing cannot be attached to the disk device.

In such a configuration, since the cartridge cannot be mounted on the disk device with the cover mounted, damage to the optical head of the disk device or the disk device system that occurs when the cartridge is mounted on the disk device with the cover mounted. A malfunction can be avoided, and proper reproduction or recording / reproduction can be performed.

[0056]

The disk cartridge of the present invention has a simple structure and is inexpensive. Moreover, since it has a closed structure,
Stable recording and reproduction can be performed without dust or foreign matter from the outside, and the effect is great. Also, since the disc can be fixed or released from the cartridge in association with the attachment / detachment operation of the cartridge housing and the cover, a complicated disc fixing and fixing releasing means becomes unnecessary, which is a great effect. Further, the presence / absence of the cover makes it possible to determine whether or not the disc cartridge can be mounted in the disc device, and it is possible to avoid damage to the optical head or the like due to erroneous insertion of the disc cartridge with a simple configuration.

[Brief description of drawings]

FIG. 1 is an external perspective view of a disk cartridge according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of the disc cartridge housing of the embodiment as seen from the back side.

FIG. 3 is an external perspective view showing a state where a cover of the disc cartridge of the embodiment is mounted.

FIG. 4 is an assembly configuration diagram showing a procedure for assembling the disk cartridge in the embodiment.

FIG. 5 is a side view of the disk cartridge according to the second embodiment of the present invention.

FIG. 6 is a perspective view of a disk cartridge according to a third embodiment of the present invention.

FIG. 7 is a side view of a disk cartridge according to a fourth embodiment of the present invention.

FIG. 8 is an external perspective view of the disk cartridge of the embodiment.

FIG. 9 is an external perspective view of a disk cartridge according to a fifth embodiment of the present invention.

FIG. 10 is a plan view showing a state in which the disc cartridge of the embodiment is mounted in a disc device.

FIG. 11 is an external perspective view of a conventional disc cartridge.

[Explanation of symbols]

 1 Disc 2 Cartridge Housing 3a Upper Half 3b Lower Half 4a Opening 5 Cover 6a Upper Groove 7a Upper Disc Press 7b Lower Disc Press 9 Protrusion

Claims (7)

[Claims] 1. A cartridge housing in which a disk is rotatably housed and at least one side of which is provided with an opening through which a recording / reproducing head or a disk motor can be inserted, and a cartridge housing sandwiched from both sides of the cartridge housing. 2. A disc cartridge, comprising at least a cover mounted on the outer surface for covering at least the opening, the cover pressing and holding the disc in the vicinity of the center thereof. 2. A center hole is formed in the disk, and a disk pressing member of the cover mounted on the outer surface of the cartridge housing engages with the center hole of the disk to remove the disk. The disk cartridge according to claim 1, wherein the disk cartridge is configured to hold the disk cartridge. 3. A cartridge housing in which a disk is rotatably housed and a recording / playback head, a disk motor or the like can be inserted on at least one side thereof, and a schematic whole of the cartridge housing. A disk cartridge comprising at least a cartridge case which covers the cartridge case, and a cover which is formed integrally with the cartridge case and covers at least the opening of the cartridge housing. 4. A cartridge housing having a cutout portion penetrating from one end of the opening portion to a side surface portion of the cartridge housing with a width of the opening portion, and an insertion opening into which the cartridge housing can be inserted. 4. The disk cartridge according to claim 3, further comprising a box-shaped cartridge case and a cover formed inside the cartridge case and covering the opening and the notch. 5. A disk holding member elastically supported so as to hold a disk is provided on a part of a wall surface of a disk housing portion of the cartridge housing, and the disk holding member can be brought into contact with the inside of the cartridge case. The contact member is arranged, and in a state where the cartridge housing is housed in the cartridge case, the disc holding member moves in contact with the contact member to hold the disc. Disk cartridge. 6. A cartridge housing in which a disk is rotatably housed and a recording / playback head, a disk motor or the like can be inserted on at least one surface, and an outer surface of the cartridge housing is provided. At least a cover that is mounted and covers at least the opening is provided, an attraction plate including a magnetic material is provided inside the cartridge housing, and the attraction plate is attracted by a magnet member provided on the cover. And a disk cartridge configured to be fixed on the outer surface of the cartridge housing. 7. The cartridge housing has a guide surface that is in contact with a cartridge shutter opening / closing mechanism of a disk device and is movable in the cartridge shutter opening / closing mechanism, and the cover is attached to the cartridge housing. , Covering at least a part of the guide surface to prevent movement of the cartridge shutter opening / closing mechanism,
The disk cartridge according to claim 1, 3 or 6.