JPH06168567A - Disk cartridge - Google Patents

Abstract

PURPOSE:To obtain a disk cartridge where lump of dust, etc., is prevented from entering into the side of information recording disk and high reliability in performance is attained. CONSTITUTION:The disk cartridge is provided with a cartridge case formed of a case upper head hole 10, a case upper drive shaft hole and a tray port in prescribed positions, a tray 4 provided with a housing recessed part housing an information recording disk in the inside, provided with a tray upper head hole 26 and a tray upper drive shaft hole respectively on positions corresponding to a case upper head hole 10 and a case upper drive shaft hole, and inserted takeably in/out from the tray port of the cartridge case and the information recording disk inserted loadably/unlodably into the housing recessed part of the tray 4. The air flow guide parts 50, 51 inclined toward the outside opposite to the housing recessed part are formed on an opening edge equivalent to at least a down-stream side in the rotating direction of the disk between the opening edges of the tray upper head hole 26 and (or) the case upper head hole 10.

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 cartridge cartridge case thereof.
Alternatively, the present invention relates to a tray that is removably inserted inside the cartridge case.

[0002]

2. Description of the Related Art FIG. 11 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]

By the way, in this disk cartridge, as shown in FIG. 12, a shutter plate 1 is used.
The whole or a part of the opening edge end faces 110a and 114a of the elongated hole 110 of No. 03 and the laser beam introduction hole 114 of the magazine plate 104 are formed perpendicularly to the rotation direction X of the information recording disk 105.

Therefore, the fine dust 121 flowing along with the air flow 120 formed by the rotation of the information recording disk 105 collides with and adheres to the opening edge end faces 110a and 114a, and is accumulated. It becomes lumpy. Then, this lump is subjected to some external force and the opening edge faces 110a and 114a are
If it is peeled off and falls on the information recording disk 105 side and adheres to the recording surface, it causes an error in recording or reproduction, and reliability becomes a problem.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a disk cartridge which is highly reliable in terms of performance.

[0015]

In order to achieve the above object, the present invention provides a cartridge case having at least a head insertion hole and a drive shaft insertion hole at predetermined positions, and a cartridge case inside the cartridge case. In a disk cartridge having an information recording disk rotatably accommodated, at least an opening edge corresponding to a downstream side in the disk rotation direction of an opening edge of a head insertion hole of the cartridge case, facing toward the outside of the cartridge case. It is characterized in that an inclined airflow guide portion is formed.

In order to achieve the above object, the present invention further comprises a cartridge case in which a case head insertion hole, a case drive shaft insertion hole, and a tray insertion hole are formed at predetermined positions, and an information recording disk inside. There is a storage recess for storing, and a tray head insertion hole and a tray drive shaft insertion hole are provided at positions corresponding to the case head insertion hole and the case drive shaft insertion hole, respectively, and the tray insertion opening of the cartridge case. In a disk cartridge having a tray that can be inserted into and removed from the tray and an information recording disk that can be inserted into and removed from a storage concave portion of the tray, at least the opening edge of the tray above the tray head insertion hole is downstream in the disk rotation direction. At the opening edge corresponding to the side, an airflow guide portion inclined toward the outside on the side opposite to the storage recess is provided. It is characterized in that form

[0017]

As described above, according to the present invention, at least one of the opening edges of the head insertion holes of the cartridge case and / or the tray corresponding to the downstream side in the disk rotation direction is provided with the airflow guide portion which is inclined outward. Have

For this reason, the fine dusts that have been carried along with the air flow generated by the rotation of the information recording disk are guided to the outside by the inclined air flow guide portion and flow out. It does not adhere or accumulate in a lump. Therefore, it is possible to provide a disk cartridge which is highly reliable in terms of performance without any fear of recording and reproducing errors due to this lump.

[0019]

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 cross-sectional view for explaining the opening operation of the shutter in the disk cartridge, FIG. 7 is a perspective view of the groove portion for opening the shutter of the disk cartridge, and FIG. 8 is each drive shaft insertion hole, head insertion hole and shutter. FIG. 9 is a plan view for explaining the relationship of the width of the head, FIG. 9 is an enlarged sectional view in the vicinity of the head insertion hole with the shutter closed, and FIG. 10 is an expansion in the vicinity of the head insertion hole with the shutter open. FIG.

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, 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 plane shape, and the upper surface thereof is indicated by an arrow and an "IN" letter indicating the direction of insertion of the disk cartridge with respect to the recording / reproducing apparatus. The display unit 6 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.

The second case half body 2 also has a substantially rectangular plane shape, and a circular case upper drive shaft insertion hole 9 is formed in the center thereof, and the second case half body 2 is connected to the second case half case 2 to insert a substantially rectangular case upper head. A hole 10 is provided. The drive shaft insertion hole 9 and the head insertion hole 1 are formed on the inner surface of the second case half body 2.
In a region including 0, a recess 11 for allowing the shutter 5 to slide is formed. This drive shaft insertion hole 9
On the front side, a pair of positioning holes 12a and 12b composed of a circular hole and an elliptical hole are formed at a predetermined interval.

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 of the second case half body 2, which is in an open state. 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 in 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 slightly on the 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.

A spring hooking pin 19 and a stopper 20 are provided on the front side of the guide wall 17 so as to project therefrom. In addition,
The guide wall 17 may be provided with a stopper. Further, a rectangular contact hole 21 and a step portion 22 surrounding the contact hole 21 are formed on the front side of the spring hooking pin 19. The stepped portion 22 has a printed circuit board 2 on which an electrically erasable memory, a so-called EEROM 23, is mounted.
4 is placed. A plurality of terminals 41 are provided on the lower surface of the printed board 24, and the terminals 41 are exposed from the contact holes 21 (see FIG. 3).

A circular tray upper drive shaft insertion hole 25 is formed at substantially the center 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 accommodating recess 27 and placed on the disk supporting parts 28a and 28b, the recording surface of the information recording disk 3 does not come into direct contact with the bottom surface of the disk accommodating 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 inwardly 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 that is the same as or longer than the width of the shutter plate 33, and a plate mounting portion 36 integrally formed inside thereof. Has been done. 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, 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 pulling force of the spring 39 moves the shutter 5 to the home position side (closed position side). It can be elastically urged, and the end surface of the plate mounting portion 36 contacts the stopper 20 of 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 can be used as the spring in addition to the coil spring.

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 the first edge. The structure is such that it does not directly contact a part of the two case halves 2.

As shown in FIG. 8, the diameter of the case upper drive shaft insertion hole 9 of the second case half 2 is R1, the diameter of the tray upper drive shaft insertion hole 25 of the tray 4 is R2, and the shutter plate 33.
When the diameter of the circular portion 33a at the tip of is at R3, there is a relationship of R1 <R2 <R3. If the lateral width of the case upper head insertion hole 10 of the second case half body 2 is W1, the lateral width of the tray upper head insertion hole 26 of the tray 4 is W2, and the lateral width of the rectangular portion 33b of the shutter plate 33 is W3, then W1 <W2 <W3. Furthermore, the length of the case upper head insertion hole 10 of the second case half body 2 is set to L1,
The length of the tray head insert hole 26 of the tray 4 is L2, and the length of the rectangular portion 33b of the shutter plate 33 is L3.
In the case of, there is a relationship of L1 <L2 <L3. With such a dimensional relationship, the circular portion 33a of the shutter plate 33 has the largest area, the tray upper drive shaft insertion hole 25 has the second largest area, and the case upper drive shaft insertion hole 9 has the smallest area. The rectangular portion 33b of the shutter plate 33 has the largest area, the tray upper head insertion hole 26 has the largest area next, and the case upper head insertion hole 10 has the smallest area.

With such a relationship, the shutter 5 can surely close the drive shaft insertion holes 9 and 25 and the head insertion holes 10 and 26. Further, even if the tray 4 is loose in the cartridge case, when the disc cartridge is used, the opening edge of the tray drive shaft insertion hole 25 or (and) the tray head insertion hole 26 has an opening on the case drive shaft insertion hole. 9 or (and) protruding inward from the head insertion hole 10 on the case,
It is possible to surely open the case upper drive shaft insertion hole 9 and the case upper head insertion hole 10 without hindering the insertion of the drive shaft or the head on the apparatus side.

In this embodiment, the circular portion 33a and the rectangular portion 33b are formed on the shutter plate 33, but as shown by the dotted line, the rectangular portion 33c has a lateral width substantially equal to the diameter R3 of the circular portion 33a. The shutter plate 33 can also be configured.

Further, in this embodiment, the drive shaft insertion holes 9 and 25 and the head insertion holes 10 and 26 are connected and integrated in the second case half body 2 and the tray 4, but the drive shaft insertion hole and the head are integrated. It is also possible to form the insertion hole separately.

As shown in FIGS. 9 and 10, a case side airflow guide portion 50 inclined outward is formed on the entire circumference of the opening edge of the case upper head insertion hole 10 of the second case half body 2. There is. Further, the tray head insert hole 2 of the tray 4
A tray-side airflow guide portion 51 is formed on the entire circumference of the opening edge of 6, and is inclined toward the outside on the side opposite to the disk storage recess 27.

Although not shown, the above-mentioned head is also provided on the entire circumference of the opening edge of the upper case drive shaft insertion hole 9 of the second case half body 2 and on the entire circumference of the opening edge of the tray top drive shaft insertion hole 25 of the tray 4. Similar to the insertion hole, a case-side airflow guide portion and a tray-side airflow guide portion that are inclined outward are formed.

By forming the airflow guide portions 50 and 51 as described above, when the information recording disk 3 rotates in the X direction at a high speed, an airflow 52 is generated as shown by an arrow, which accompanies fine dust. However, since the airflow 52 is guided to the outside by the inclined airflow guide portions 50 and 51 and flows out, dust and the like do not adhere to and accumulate on the end face of the opening edge in a lump as in the conventional case. Therefore, there is no concern about recording and playback errors due to this lump, and performance is stable.

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 placed 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 22 of the second case half 2, and the terminal portion 41 formed 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 notch portions 16, 16 of the rear walls 8, 14 in 2 are aligned with each other to form a shutter opening groove 44 having an open end portion 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 engagement 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.

The front projections 32a, 32a provided on the tray 4 are fitted into the engaging openings 42, respectively, and the rear projections 32b, 32b are respectively attached to the side walls 7, 13 of the case halves 1, 2. Since the tray 4 is held in contact with the cartridge case in contact therewith, the tray 4 does not rattle even if the information recording disk 3 rotates at a high speed during recording and reproduction.

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 device, 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 constantly 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, the information recording disk 3 can be easily taken out from the tray 4 by inserting a fingertip from the central opening 46 of the information recording disk 3 to the drive shaft insertion hole 25 of the tray 4. 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 so that the protrusion 32a is formed as shown in FIG.
Is engaged with the engagement port 42 to lock the tray 4 with respect to the cartridge case.

In the above-mentioned embodiment, the airflow guides are formed on both the tray and the cartridge storage case, but the airflow guides may be formed on either the tray or the cartridge storage case.

Further, in the above-mentioned embodiment, the disk cartridge having the structure in which the information recording disk can be put in and taken out from the cartridge case through the tray has been described, but the present invention is not limited to this. It can also be applied to a disk cartridge having a structure in which an information recording disk is housed in a cartridge cartridge case without using. Therefore, in this case, the airflow guide portion is formed only in the head insertion hole of the cartridge case.

[0064]

As described above, according to the present invention, at least the opening edge corresponding to the downstream side in the disk rotation direction among the opening edges of the head hole of the cartridge case and / or the tray is inclined toward the outside. Have a section.

Therefore, since the fine dusts that have flowed along with the air flow generated by the rotation of the information recording disk are guided to the outside by the inclined air flow guide portion and flow out, the opening of the head insertion hole is opened. Dust will not accumulate and accumulate on the end faces in a lump. Therefore, it is possible to provide a disk cartridge which is highly reliable in terms of performance without any fear of recording and reproducing errors due to this lump.

[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 plan view for explaining the relationship between the drive shaft insertion hole, the head insertion hole, and the width of the shutter.

FIG. 9 is an enlarged cross-sectional view in the vicinity of a head insertion hole with the shutter closed.

FIG. 10 is an enlarged cross-sectional view near the head insertion hole with the shutter open.

FIG. 11 is an exploded perspective view of a conventionally proposed disk cartridge.

FIG. 12 is an enlarged sectional view of the vicinity of a laser beam introducing hole of this disk cartridge.

[Explanation of reference numerals] 1st case half body 2 second 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 Disc storage recess 47 Tray insertion port 50 Case side airflow guide portion 51 Tray side airflow guide portion 52 Airflow X Rotation direction of information recording disk

Claims (3)

[Claims] 1. A disk cartridge including at least a cartridge case having a head insertion hole and a drive shaft insertion hole formed at a predetermined position, and an information recording disk rotatably housed inside the cartridge case. , At least the opening edge corresponding to the downstream side in the disk rotation direction of the head insertion hole opening edges of the cartridge case,
A disc cartridge which is characterized in that an airflow guide portion which is inclined toward the outside of the cartridge case is formed. 2. A cartridge case having a case head insertion hole, a case drive shaft insertion hole, and a tray insertion hole formed in a predetermined position, and a storage concave portion for storing an information recording disk therein, wherein A tray that is inserted into and removed from the tray insertion opening of the cartridge case, which is provided with a tray head insertion hole and a tray drive shaft insertion hole at positions corresponding to the head insertion hole and the case drive shaft insertion hole, respectively. A disk cartridge having an information recording disk that is removably inserted into a storage recess of a tray, wherein the storage recess is provided at least at an opening edge of the tray head insertion hole opening edge corresponding to a downstream side in the disk rotation direction. A disc cartridge formed by forming an airflow guide portion that is inclined toward the outside on the opposite side to Azalea. 3. The airflow inclined toward the outside of the cartridge case according to claim 2, wherein an opening edge corresponding to at least the downstream side in the disk rotation direction among the opening edges of the on-case head insertion hole of the cartridge case. A disc cartridge having a guide portion.