JPH06168564A - Disk cartridge - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a highly reliable disk cartridge which can prevent invasion of dust from the outside. A cartridge storage case having an upper case head insertion hole 10 and an upper case drive shaft insertion hole 9 formed at predetermined positions and a tray insertion opening 47 on one side surface, and a disk storage for storing an information recording disk 3. Has a recess 27,
A tray upper head insertion hole 26 and a tray upper drive shaft insertion hole 25 are provided at positions corresponding to the case upper head insertion hole 10 and the case upper drive shaft insertion hole 9, respectively, and can be inserted and removed from the tray insertion opening 47 of the cartridge case. In the disk cartridge having the tray 4 to be inserted into the tray 4 and the information recording disk 3 that can be inserted into and taken out from the disk storage concave portion 27 of the tray 4, at a substantially intermediate position of the tray insertion opening edge 51 of the cartridge case. And an engaging portion (engaging protrusion 5 which engages with a part of the tray 4 when the tray 4 is inserted into the cartridge case.
2) is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge such as an optical disk cartridge and a magneto-optical disk cartridge, and more particularly to a disk cartridge having a structure in which a tray is removably inserted in a cartridge case. It is about.

[0002]

2. Description of the Related Art FIG. 17 shows a conventional proposal (actual fairness 3-
(See Japanese Patent No. 48780) FIG. 4 is an exploded perspective view of a disk cartridge.

As shown in the figure, this disk cartridge is mainly composed of a lid 101, a magazine frame 102, a shutter plate 103, a magazine plate 104, and an information recording disk 105.

The lid 101 is plate-shaped, has a hole 106 formed in the center thereof, and a stabilizer 107 for holding the information recording disk 105 is arranged inside the hole 106.

A circular notch 180 for accommodating the information recording disk 105 is formed at the center of the magazine frame 102.

A circular hole 109 is formed in the central portion of the shutter plate 103, and an elongated hole 110 communicating with the circular hole 109 is provided. A shutter lever 111 is rotatably connected to one end of the shutter plate 103, and a spring 112 is arranged between the shutter lever 111 and a groove (not shown) formed in the lower surface of the magazine frame 102. ing.

A turntable insertion hole 113 is formed at the center of the magazine plate 104, and a laser beam introduction hole 114 is provided near the turntable insertion hole 113.

The lid 101 is a magazine frame 10
2 is rotatably supported around the base 115, while the magazine plate 104 is attached to the magazine frame 102.
The shutter plate 103 is rotatably arranged between the magazine frame 102 and the magazine plate 104.

In the storage state in which the lid 101 is closed, the lid 101, the magazine frame 102, and the shutter plate 10 are closed.
The information recording disk 1 is provided in a space formed between the information recording disk 1 and
05 is stored. Further, the elongated hole 110 of the shutter plate 103 is the laser beam introduction hole 11 of the magazine plate 104.
4 does not match, and the laser beam introduction hole 114 is closed by the shutter plate 103.

There are two modes of use of the information recording disk 105, and one of them is provided in the apparatus by mounting the information recording disk 105 in the recording / reproducing apparatus in the state of being stored. The tip 116 of the shutter lever 111 is pushed with a pin for opening the shutter, and thereby the shutter plate 103 is rotated, so that the elongated hole 110 of the shutter plate 103 is aligned with the laser light introduction hole 114 of the magazine plate 104. In this method, the laser beam introducing hole 114 is opened to record or reproduce information.

Another usage mode is the magazine frame 102.
On the other hand, the method is to open the lid 101, take out the information recording disk 105 from the storage space, and mount the information recording disk 105 in the recording / reproducing apparatus. Which usage mode is adopted is determined according to the configuration of the recording / reproducing apparatus to be used.

[0012]

In this disc cartridge, since the shutter plate 103 is arranged immediately below the information recording disc 105, when the shutter plate 103 is opened or closed, or the disc cartridge is carried. At this time, the shutter plate 103 contacts the recording surface of the information recording disk 105 and damages the recording surface, which causes an error during recording and reproduction.

Further, since the drive shaft insertion hole is exposed, dust can easily enter the case.

In order to prevent this from happening, a shutter having a U-shaped or L-shaped cross section is slidably attached to the outside of the cartridge case so that the shutter does not directly contact the information recording disk and is driven. A structure is adopted in which the shaft insertion hole and the laser light introduction hole are covered with a shutter.

However, in this structure, since the shutter is exposed to the outside, it can be easily slid, and the shutter is opened, and the recording surface of the information recording disk is touched with a finger from the head insertion hole so that oils and fats adhere. However, this causes an error.

Furthermore, the U-shaped shutter tends to open in a direction perpendicular to the surface of the cartridge case,
There is a problem in that a gap is formed between the shutter and the cartridge case, and dusts enter through the gap and adhere to the recording surface, again causing an error.

In order to solve the above-mentioned drawbacks of the prior art, the inventors of the present invention have provided a cartridge case having a tray insertion opening formed on a side surface thereof, and a tray which is inserted into and removed from the cartridge case. A disk cartridge having a shutter slidably disposed between the cartridge case and the tray has been proposed.

The present invention relates to an improvement of the cartridge case and tray in the disk cartridge having this structure, and an object thereof is to provide a highly reliable disk cartridge which can prevent invasion of dusts from the outside. It is in.

[0019]

In order to achieve the above object, the present invention forms a case head insertion hole and a case drive shaft insertion hole at predetermined positions, and provides a tray insertion opening on one side surface. A cartridge storage case, and a disk storage recess for storing an information recording disk, and a tray top head insertion hole and a tray top drive shaft insertion hole are provided at positions corresponding to the case top head insertion hole and the case top drive shaft insertion hole. A disk cartridge which is provided with a tray that is inserted into and removed from the tray insertion opening of the cartridge storage case, and an information recording disk that is inserted into and removed from the disk storage recess of the tray. When the tray is inserted into the cartridge storage case at approximately the middle of the opening edge of the tray insertion opening of In which characterized in that a engagement portion for a portion of the engagement.

[0020]

[Operation] When the tray insertion opening is formed on the side surface of the cartridge case, the tray insertion opening is deformed into a swelling shape,
A gap may be created between the tray and the tray. Then, dust and the like enters through the gap and adheres to the surface of the information recording disk, which causes an error during recording and reproduction.

As described above, according to the present invention, an engaging portion that engages with a part of the tray when the tray is inserted into the cartridge case is provided at a substantially intermediate position of the opening edge of the tray insertion opening of the cartridge case. By providing, even if the tray insertion opening of the cartridge storage case is deformed into a swelling shape, it is corrected, and troubles due to intrusion of garbage are eliminated,
A reliable disk cartridge with few errors can be provided.

[0022]

Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a disk cartridge according to the embodiment, FIG. 2 is a longitudinal sectional view of the disk cartridge, and FIG.
Is a perspective view seen from the bottom of the disk cartridge, FIG. 4 is a perspective view with the tray of the disk cartridge being pulled out, FIG. 5 is an enlarged perspective view of a shutter used for the disk cartridge, and FIG. FIG. 7 is an enlarged sectional view for explaining the opening operation of the shutter, FIG. 7 is a perspective view of a groove portion for opening the shutter of the disk cartridge, and FIG. 8 is a part showing a state before the tray is inserted into the cartridge case. FIG. 9 is an enlarged sectional view, and FIG. 9 is a partially enlarged sectional view showing a state in which the tray is inserted in the cartridge case.

As shown in FIG. 1, the disk cartridge is mainly composed of a first case half body 1, a second case half body 2, an information recording disk 3 such as an optical disk 3, a tray 4, and a shutter 5. ing.

The first case half body 1, the second case half body 2, the tray 4 and the shutter 5 are made of, for example, ABS resin or P.
It is injection-molded with synthetic resin such as S resin and PC resin.

The first case half body 1 has a substantially rectangular planar shape, and an arrow and "IN" are displayed on the upper surface of the first case half body 1 to indicate the insertion direction of the disk cartridge to the recording / reproducing apparatus. A display unit 6 composed of characters is provided. Both side walls 7 and 7 and a rear wall 8 are formed on the first case half body 1, and no wall is formed on the front side, which is in an open state.

Similarly, the second case half body 2 also has a substantially rectangular planar shape, and a circular case upper drive shaft insertion hole 9 is formed in the center thereof, and is connected to it to form a substantially rectangular case upper part. A head insertion hole 10 is provided. A recess 11 for allowing the shutter 5 to slide is formed in a region including the drive shaft insertion hole 9 and the head insertion hole 10 on the inner surface of the second case half body 2. A pair of positioning holes 12a and 12b, which are a circular hole and an elliptical hole, are formed on the front side of the drive shaft insertion hole 9 at predetermined intervals.

Both side walls 13 and 13 and a rear wall 14 are formed on the second case half body 2, and no wall is formed on the front side and the two are open. The front side lower ends of the side walls 7 and 7 of the first case half body 1 and the second case half body 2
A notch 15 is provided at each of the upper ends of the both side walls 13, 13 on the front side (a total of four places), and the first case half body 1 and the second case half body 2 are joined to form a cartridge case. At this time, the notches 15 are opposed to each other to form the engagement openings 42 (see FIGS. 3 and 4) on both side surfaces of the cartridge case.

A notch 16 is formed on the rear wall 14 of the second case half 2 on the upstream side in the direction of inserting the disk cartridge, and a guide having a height lower than that of the rear wall 14 is formed on the slightly front side of the rear wall 14. A wall 17 is provided. The guide wall 17 is continuously formed from one side wall 13 to the other side wall 13. Similar cutouts and guide walls 18 (FIGS. 2 and 6) are also formed in the rear wall 8 of the first case half 1.
(See) is formed.

On the front side of the guide wall 17, a spring hooking pin 19 and a stopper 20 are provided so as to project. In addition,
The stopper 20 may be provided on the guide wall 17.
Further, on the front side of the spring hooking pin 19, a square contact hole 21 and a step portion 22 surrounding the periphery thereof are formed. A printed circuit board 24 having a so-called EEROM 23 mounted thereon, in which information can be electrically erased, is mounted on the step portion 22. A plurality of terminal portions 41 are provided on the lower surface of the printed board 24 so that the terminal portions 41 are exposed from the contact holes 21 (FIG. 3).
reference). The EEROM 23 is adapted to store data relating to the information recording disk 2 through the control unit of the recording / reproducing apparatus in which the disk cartridge is mounted.

A circular tray upper drive shaft insertion hole 25 is formed at a substantially central portion of the tray 4, and a substantially rectangular tray upper head insertion hole 26 is provided so as to communicate therewith. An approximately C-shaped disk accommodating recess 27 is formed in a region surrounding the drive shaft insertion hole 25 and excluding the head insertion hole 26.

An outer peripheral portion of the drive shaft insertion hole 25 excluding a portion communicating with the head insertion hole 26 and a disk storage recess 27.
A continuous or discontinuous disk support 2 is provided on the outer periphery of the disk.
8a and 28b are projected (in this embodiment, the inner disk support portion 28a is continuous and the outer disk support portion 28b is discontinuous). When the information recording disk 3 is inserted into the disk storage recess 27 and placed on the disk supporting portions 28a and 28b, the recording surface (lower surface) of the information recording disk 3 is prevented from directly contacting the bottom surface of the disk storage recess 27. (See FIG. 2).

A grip portion 29 is formed on the front side of the tray 4, and elastic portions 31 which are elastically deformable inside each other through slits 30 are integrally provided at both ends thereof.

Protrusions 32a and 32b are formed on both side surfaces of the elastic portion 31 and both rear side surfaces of the tray 4, respectively.

The shutter 5 is composed of a shutter plate 33 and a slider 34. The shutter plate 33 is continuously punched out from a thin sheet material, and has an area that surely covers the drive shaft insertion hole 9 and the head insertion hole 10 of the second case half body 2.

The slider 34 is composed of an elongated slide portion 35 having a substantially H-shaped or rectangular cross-sectional shape which is the same as or longer than the width of the shutter plate 33, and a plate mounting portion 36 integrally formed inside thereof. It is configured.
One end of the shutter plate 33 is connected to the lower surface of the plate mounting portion 36 by an appropriate means such as ultrasonic fusion, strong fitting or adhesion.

In this embodiment, a separate shutter plate 33 is used.
The slider 34 and the slider 34 are prepared and integrated with each other, but the shutter plate 33 and the slider 34 may be integrally molded in terms of design.

As shown in FIG. 5, a stepped portion 37 is formed on the upper surface of the plate mounting portion 36, and a spring hooking pin 38 is provided on the upper surface thereof. As shown in Figure 1,
By tensioning the spring 39 between the spring hooking pin 38 and the spring hooking pin 19 of the second case half 2, the tensile force of the spring 39 can elastically bias the shutter 5 toward the closed position. Then, the end surface of the plate mounting portion 36 contacts the stopper 20 of the first case half body 1 or the second case half body 2. In this way, the end surface of the plate mounting portion 36 has the stopper 2
By contacting 0, the edge of the thin shutter plate 33 does not directly contact the end of the recess 11 in the second case half 2, and the drive shaft insertion hole 9 and the head insertion hole of the second case half 2 are not contacted. 10 is closed. A torsion spring may be used as the spring 39.

When the end edge of the shutter plate 33 directly contacts the end of the recess 11 at the closed position of the shutter 5, the end of the thin shutter plate 33 curls inward while the shutter 5 is repeatedly opened and closed. There is a concern that a gap may be formed between the second case half body 2 and the shutter 5. In addition, if the slider 5 is positioned by pulling the slider 34 with the spring 39 and bringing the end edge of the shutter plate 33 into contact with the end of the recess 11, the shutter plate 3
Shear stress may occur at the joint between the slider 3 and the slider 34, and the shutter plate 33 may come off the slider 34.

In the present embodiment, in order to solve such a problem, the slider 34 is brought into contact with a part of the first case half body 1 or a part of the second case half body 2 so that the end edge of the shutter plate 33 becomes a first position. The structure is such that it does not directly contact a part of the two case halves 2.

For example, as shown in FIGS. 1, 4 and 8, engaging projections 52 are integrally formed at approximately the center of the upper and lower tray insertion opening openings 51 of the cartridge case. On the other hand, pressing recesses 53 (see FIG. 8) into which the engaging protrusions 52 are fitted are formed at positions facing the engaging protrusions 52 in the grip portion 29 of the tray 4. As shown in the figure, one surface of the pressing recess 53 is
A tapered surface is provided for smooth fitting of the engaging projection 52.

Therefore, the tray 4 is placed in the cartridge strip case.
Is inserted, the upper and lower engaging projections 52 of the cartridge case are forcibly fitted into the pressing recesses 53, respectively.
Therefore, even if the tray insertion opening of the cartridge case is deformed in a bulge shape, the engaging projection 52 is pressed by the pressing recess 53.
The deformation is corrected by forcibly inserting into the. Therefore, no gap is formed between the cartridge case and the tray, and an excellent dustproof effect can be obtained.

Next, the order of assembling the disk cartridge will be described.

The lower groove 40 (see FIG. 6) of the slider 34 is inserted into the guide wall 17 of the second case half 2 so that the shutter 5 is mounted on the recess 11 and the spring hooking pin 19 and the spring are engaged. A spring 39 is stretched between the hanging pin 38.

The printed circuit board 24 is placed on the step portion 22 of the second case half body 2, and the terminal portion 41 provided on the lower surface of the printed circuit board 24 is connected to the contact hole 21 as shown in FIG.
Exposed from the outside.

Next, the first case half body 1 is placed on the second case half body 2 so that the guide wall 18 of the first case half body 1 is inserted into the upper groove portion 43 of the slider 34 as shown in FIG. ,
13 and the rear walls 8 and 14 are joined together by an appropriate means such as ultrasonic welding. By this joining, the notch portions 15 of the first case half body 1 and the second case half body 2 are aligned with each other to form the engagement ports 42 (see FIGS. 3 and 4) on both left and right side surfaces, and the tray on the front side. The insertion port 47 is formed, and the first case half body 1 and the second case half body 2 constitute a cartridge case having a U-shaped cross section.

By joining the first case half body 1 and the second case half body 2, the slider 34 is moved to the first case half body 1.
And is reliably engaged with the second case half body 2.

Further, by joining the first case half body 1 and the second case half body 2, as shown in FIG. 7, both case half bodies 1,
The cutout portions 16, 16 of the rear walls 8, 14 in 2 are aligned with each other to form a shutter opening groove 44 whose end portion is open toward one side surface.

The tray 4 is inserted from the tray insertion opening 47 with a relatively strong force, and the projection 32b is fitted into the engagement opening 42.
The drawer complete position of the tray 4 is secured. In this state, the information recording disk 3 is inserted into the storage recess 27 of the tray 4 and placed on the disk supporting portion 28 (see FIG. 4).

Then, the tray 4 is inserted into the cartridge case, and the projection 32a is fitted into the engaging opening 42 so that the tray 4 is locked and the insertion completion position of the tray 4 is secured. The tray insertion opening 47 of the case is closed (see FIG. 3), and the assembly of the disk cartridge is completed.

When the information recording disk 3 is mounted in the recording / reproducing apparatus while being housed in the cartridge storage case,
With the case half 1 facing upward, the disk cartridge is inserted into the recording / reproducing apparatus along the direction of the display unit 6 (see FIG. 1). As shown in FIG. 6, a shutter opening pin 45 is projected on the cartridge insertion path in the recording / reproducing apparatus. When the disc cartridge is inserted, the pin 45 automatically enters the shutter opening groove 44. , Abuts on the end of the slider 34.

By further inserting the disk cartridge, the shutter plate 33 slides in the recess 11 together with the slider 34 against the tensile force of the spring 39, and the drive shaft insertion holes 9 and 25 and the head insertion holes 10 and 26 are inserted. Open at the same time.

By making the slider 35 relatively longer than the width of the shutter plate 33 and sliding it along the upper and lower guide walls 17 and 18 as in this embodiment, the shutter 5 becomes smoother without rattling. Moving. In this way, information is recorded on or reproduced from the information recording disk 3.

As described above, the shutter 5 has the recess 11
Since it is housed inside and a slight gap is formed between it and the tray 4, when the shutter 5 slides, the tray 4
Never come into contact with.

By ejecting the disk cartridge from the recording / reproducing apparatus, the shutter opening pin 4
5 relatively slips out of the shutter opening groove 44, the shutter 5 returns to the home position by the pulling force of the spring 39, which is not accompanied thereby, and simultaneously closes the drive shaft insertion holes 9 and 25 and the head insertion holes 10 and 26. .

When the information recording disk 3 is taken out from the cartridge storage case and used as a single body, the picking portion 29
The elastic portions 31, 31 provided on the left and right ends of the are picked up and deformed by pushing them inward. Then, the projection 32a is displaced inward from the engagement opening 42 and the lock is released. In this state, the tray 4 is pulled toward the front side, and the projection 32b is fitted into the engagement opening 42 as shown in FIG. In this state, the tray 4 is prevented from coming off from the cartridge case, and the information recording disk 3 is completely exposed from the cartridge case.

Since the shutter 5 is always engaged with the upper and lower guide walls 17 and 18 as shown in FIG. 2, even if the tray 4 is pulled out, the shutter 5 remains in the cartridge case as it is, so the tray 4 is pulled out. As a result, the drive shaft insertion hole 25 provided in the tray 4 as shown in FIG.
Opens without being disturbed by the shutter 5.

Therefore, from the disk side drive shaft insertion hole 46 of the information recording disk 3 to the drive shaft insertion hole 25 of the tray 4.
The information recording disk 3 can be easily taken out from the tray 4 by inserting a fingertip over. Then, the information recording disk 3 alone is attached to the recording / reproducing apparatus to record or reproduce information.

After recording and reproducing, the information recording disk 3 is housed again in the concave portion 27 of the tray 4 and the tray 4 is pushed into the cartridge case, and as shown in FIG.
Is engaged with the engaging opening 42 to lock the tray 4 with respect to the cartridge case, and the tray 4 does not come out unexpectedly.

10 and 11 are diagrams for explaining the second embodiment of the present invention. In the case of this embodiment, for holding down the tray insertion opening opening edge 51 of the cartridge storage case at a position corresponding to the central portion of the tray insertion opening opening edge 51 of the cartridge storage case of the knob portion 29 formed on the tray 4. The protrusion 54 is formed.

Therefore, the tray 4 is placed in the cartridge strip case.
11 is inserted, the central portion of the tray insertion opening opening edge 51 of the cartridge case is pushed by the holding projection 54, as shown in FIG. Therefore, even if the tray insertion opening of the cartridge case is deformed like a bulge, the center portion of the tray insertion opening opening edge 51 is forcibly pushed by the pressing projection 54 to correct the deformation. It Therefore, no gap is formed between the cartridge case and the tray,
Excellent dustproof effect is obtained.

In the case of this embodiment, the central portion of the tray insertion opening opening edge 51 of the cartridge case corresponds to an engaging portion which engages with the pressing protrusion 54 of the tray 4.

12 and 13 are diagrams for explaining the third embodiment of the present invention. In the case of this embodiment, a rounded convex portion 52a is provided at the tip of the engaging projection 52, while an opening 55 into which the convex portion 52a is fitted is provided at the root of the pressing projection 54 of the tray 4. Has been formed. The engagement between the convex portion 52a and the opening 55 can prevent the tray 4 from coming out unexpectedly.

FIG. 14 is a diagram for explaining the fourth embodiment of the present invention. In the case of this embodiment, the engaging projection 52 and the pressing projection 54 are engaged with each other on the inclined surface.

15 and 16 are views for explaining the fifth embodiment of the present invention. In the case of this embodiment, engaging recesses 56 are respectively provided at the tray insertion opening opening edges of the first case half 1 and the second case half 2, and the pressing projections 54 of the tray 4 are provided in the engaging recesses 56. Get in. A step portion 57 is formed inside the pressing protrusions 54, 54, and the first case half 1 and the second case half are formed between the step portion 57 and the pressing protrusion 54 as shown in FIG. The structure is such that the tray insertion opening opening edge 51 of the body 2 is clamped.

In each of the above-mentioned embodiments, the engaging projection piece 52 is used.
Alternatively, one engaging recess 56 is provided at a substantially intermediate position of the tray insertion opening opening edge 51, but the present invention is not limited to this, and the engaging protrusion 52 or the engaging recess 56 is not limited thereto.
May be provided along the tray insertion opening opening edge 51 at a predetermined interval, and the engaging projections 52 or the engaging recesses 56 may be formed over substantially the entire length of the tray insertion opening opening edge 51.

[0066]

As described above, according to the present invention, the engagement which engages with a part of the tray when the tray is inserted into the cartridge storage case is located at approximately the middle position of the opening edge of the tray insertion opening of the cartridge storage case. Since the portion is provided, it is possible to prevent the tray insertion opening of the cartridge case from being deformed in the shape of a bulge, so that the trouble due to the invasion of dust can be eliminated, and a highly reliable disk cartridge can be provided.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of the disk cartridge.

FIG. 3 is a perspective view seen from the bottom surface of the disk cartridge.

FIG. 4 is a perspective view showing a state where the tray of the disk cartridge is pulled out.

FIG. 5 is an enlarged perspective view of a shutter used for the disc cartridge.

FIG. 6 is an enlarged cross-sectional view for explaining the opening operation of the shutter in the disc cartridge.

FIG. 7 is a perspective view of a groove portion for opening the shutter of the disc cartridge.

FIG. 8 is a partially enlarged cross-sectional view showing a state before the tray is inserted into the cartridge case.

FIG. 9 is a partially enlarged cross-sectional view showing a state in which the tray is inserted in the cartridge case.

FIG. 10 is a partial plan view of a disk cartridge according to the second embodiment of the present invention.

11 is an enlarged cross-sectional view taken along the arrow line in FIG.

FIG. 12 is a partial sectional view of a disk cartridge according to the third embodiment of the present invention.

FIG. 13 is a partial perspective view of a first case half body used in the embodiment.

FIG. 14 is a partial sectional view of a disk cartridge according to the fourth embodiment of the present invention.

FIG. 15 is a partial perspective view of a disk cartridge according to the fifth embodiment of the present invention.

FIG. 16 is a partial cross-sectional view of the disk cartridge according to the embodiment.

FIG. 17 is an exploded perspective view of a conventionally proposed disk cartridge.

[Explanation of symbols]

 1 1st case half body 2 2nd case half body 3 Information recording disk 4 Tray 5 Shutter 9 Case upper drive shaft insertion hole 10 Case upper head insertion hole 25 Tray upper drive shaft insertion hole 26 Tray upper head insertion hole 27 Disk storage recess 47 Tray Insertion Port 51 Tray Insertion Port Opening Edge 52 Engaging Projection Piece 53 Recessing Recess 54 54 Retaining Projecting Part 56 Engaging Recess

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kinse Tsuburaya 1-88 1-Tora Tora, Ibaraki City, Osaka Prefecture Hitachi Maxell Co., Ltd.

Claims (3)

[Claims] 1. A cartridge storage case in which a case head insertion hole and a case drive shaft insertion hole are formed at predetermined positions and a tray insertion opening is provided on one side surface, and a disk storage recess for storing an information recording disk. Have,
A tray that is inserted into and removed from the tray insertion opening of the cartridge case is provided with a tray head insertion hole and a tray drive shaft insertion hole at positions corresponding to the case head insertion hole and the case drive shaft insertion hole, respectively. And a disc cartridge having an information recording disc that is removably inserted into the disc storage recess of the tray, when the tray is inserted into the cartridge storage case at the edge of the tray insertion opening of the cartridge storage case. A disk cartridge having an engaging portion for engaging with a part of the tray. 2. The tray of the cartridge case according to claim 1, wherein an engaging projection is provided at a substantially intermediate position of an opening edge of the tray insertion opening of the cartridge case, and the tray of the cartridge case is inserted when the tray is inserted into the cartridge case. A knob is formed on the tray so as to be exposed to the outside of the cartridge case in contact with the opening edge of the insertion opening, and a holding recess into which the engaging projection fits is provided at a position of the knob facing the engaging projection. Disc Cartridge which features that. 3. The tray according to claim 1, wherein when the tray is housed in the cartridge case, the tray is formed with a knob portion that comes into contact with the opening edge of the tray insertion opening of the cartridge case and is exposed to the outside of the cartridge case. And a pressing protrusion for pressing the tray insertion opening opening edge of the cartridge case is formed at a position corresponding to the intermediate position of the tray insertion opening opening edge of the cartridge case in the grip portion. Cartridge.