JPH0863931A - Disk cartridge - Google Patents

Abstract

PURPOSE: To obtain a disk cartridge for surely preventing the malfunction of an opening/closing pin caused when the disk cartridge is loaded in a recording/reproducing device while turning over the disk cartridge. CONSTITUTION: The disk cartridge is provided with a case for storing a disk-like recording medium and a shutter, and on one end edge of the case, notches 10a and 10b in which the opening/closing pin can be fitted are formed when the disk cartridge is loaded in the recording/reproducing device while turning over the disk cartridge. In addition to this, a pair of malfunction preventing walls 11a and 11b having satisfactory height are formed adjacent to the notches 10a and 10b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge containing a disc-shaped recording medium, and more particularly to a 3.5-inch disc cartridge.

[0002]

2. Description of the Related Art A disc-shaped recording medium used in a recording / reproducing apparatus is housed in a disc cartridge in order to prevent the disc-shaped recording medium from being damaged or dust attached when not in use. It is protected by As such a disc cartridge, for example, there is one as shown in FIGS. In FIG.
Reference numeral 101 is a case including an upper half piece 101a and a lower half piece 101b, and a disk-shaped recording medium (not shown) is housed in the case 101. When the disc cartridge is mounted on the recording / reproducing apparatus, a rotating hole (not shown) for rotating the disc-shaped recording medium or a head insertable for reading / writing information is inserted into the case 101. A hole (not shown) is formed.

Here, in order to prevent dust from entering the inside of the case 101 through the rotation hole and the head insertion hole,
A shutter 102 is attached to the case 101. The case of the shutter 102 is constantly urged by a torsion coil spring 104 housed in the case 101 to close the rotation hole and the head insertion hole.

By the way, if the front and back of the disc cartridge are mistakenly mounted on the recording / reproducing apparatus, the opening / closing pin P of the recording / reproducing apparatus will be located on the opposite side of the case 101 (the lower right side in FIG. 8). Become. Case 1 like this
When the opening / closing pin P is located on the lower right side of 01, the opening / closing pin P mistakenly moves to the upper left side to open the shutter 102. Then, the shutter 102 and the case 101 may be damaged by the opening / closing pin P. Therefore, in order to prevent the open / close pin P from malfunctioning, as shown in FIG. 9 and FIG.
Notches 106a and 106b into which the opening and closing pin P can be fitted are formed in 01a and 101b, and a pair of malfunction preventing walls 105a and 105b are formed adjacent to the notches 106a and 106b.

[0005]

However, in such a conventional disk cartridge, the notches 106a and 106b are provided in order to prevent malfunction of the opening / closing pin P.
Although a pair of malfunction prevention walls 105a and 105b are formed to project from the above, one end 104a of the torsion coil spring 104 is formed.
Since it is bent at a right angle for attachment to the shutter, this one tip 104a is attached to one malfunction prevention wall 105b.
The malfunction prevention wall 105b has a predetermined height sufficiently higher than the opening / closing pin P fitted into the notches 106a and 106b (that is, the malfunction prevention wall 1 on the other side) so as not to come into contact with the malfunction prevention wall 105b.
It is set lower than the height of 05a). If the height of the one malfunction prevention wall 105b is set lower than the predetermined height, the opening / closing pin P fitted in the notches 106a and 106b may get over the malfunction prevention wall 105b and malfunction. Occurs. Therefore, there is a problem that the shutter 102, the case 101, and the like are damaged due to a malfunction of the opening / closing pin P, and the disc cartridge cannot be used.

[0006]

In order to solve such a problem, according to the present invention, a case in which a disk-shaped recording medium is housed, a shutter attached to this case and opened and closed by an opening and closing pin, The pair of malfunctions includes a notch formed in the case into which the open / close pin can be fitted, and a pair of malfunction preventing walls formed adjacent to the notch to project from the case to prevent malfunction of the open / close pin. The prevention wall is set to a predetermined height sufficiently higher than the opening / closing pin fitted in the notch.

When the front and back of the disk cartridge are mistakenly mounted in the recording / reproducing apparatus in reverse, the opening / closing pin of the recording / reproducing apparatus is located on the side opposite to the predetermined position of the case and fitted into the notch. When the opening / closing pin is fitted into the notch, the opening / closing pin accidentally tries to move to open the shutter. However, since the pair of malfunction preventing walls are formed at a sufficiently high predetermined height, the pair of malfunction preventing walls cannot be crossed over, and the movement of the opening / closing pin is completely prevented.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of a disc cartridge according to the present invention.

In FIGS. 1 and 2, reference numeral 1 is a case of a disk cartridge, which is made of a synthetic resin and is composed of an upper half piece 1a and a lower half piece 1b of a rectangular flat housing. . A 3.5-inch optical disk 2 (disk-shaped recording medium) in which optical information is recorded is housed in the case 1. A rotation hole 4 for rotating the optical disc 2 in the case 1 by a spindle motor (not shown) when the optical disc 2 is mounted on the recording / reproducing apparatus is formed in the center of the lower half piece 1b of the case 1. The hub 2a provided at the center of the optical disc 2 is exposed from the rotation hole 4. Head insertion holes 3 are formed in the upper and lower halves 1a and 1b of the case 1 so that an optical head (not shown) for reading information recorded on the optical disk 2 can be accessed.

When the optical disk 2 is not used, a shutter 5 is attached to the case 1 in order to prevent dust from entering the case 1 through the rotation hole 4 and the head insertion hole. The shutter 5 is formed by bending a thin metal plate such as stainless steel into a U-shaped cross section from a substantially central portion, and an opening / closing plate portion 6 for opening / closing the rotation hole 4 and the head insertion hole 3, and the opening / closing plate portion 6. Also has an auxiliary opening / closing plate portion 7 having a short bending length.

As shown in FIG. 3, the guide portion G formed at the tip of the recording / reproducing apparatus of the case 1 is formed on the left side of the drawing and extends horizontally to a position where it is dropped from the upper end surface of the case 1. It has a surface 8. An opening / closing pin P for opening / closing the shutter 5 is provided on the right side of the guide surface 8 in the figure.
An escape recess 9 is formed to allow the shutter 5 to drop when the shutter 5 is opened. The opening / closing pin P moves the shutter 5 to the right in FIG. 3 to open the head insertion hole 3.

By the way, if the front and back of the disk cartridge are erroneously mounted on the recording / reproducing apparatus, the opening / closing pin P malfunctions as described above. In order to prevent the malfunction of the opening / closing pin P, the opening / closing pin P can be fitted to the insertion tip portions of the upper half piece 1a and the lower half piece 1b on the opposite side to the guide surface 8 as shown in FIG. Notch 1
0a, 10b are formed, and a pair of malfunction preventing walls 11a, 1a are formed in the notches 10a, 10b adjacent to the left side in FIG.
1b is formed so as to project upward. In addition, the pair of malfunction preventing walls 11a and 11b are provided with the notch 10 as shown in FIG.
The height is set to a predetermined height which is sufficiently higher than the opening / closing pin P fitted in the a and 10b, and substantially the same height.

A bent portion 5a of the shutter 5 having a substantially U-shaped cross section.
A slider 12 made of synthetic resin such as polyacetal, which is slidably contacted with the guide portion G, is attached to the inner surface side of the slider 12. The slider 12 has a substantially right half in FIG.
It is fixed to the inner surface side of the with a tapping screw 13. Here, since the guide portion G of the case 1 with which the slider 12 slides is also made of synthetic resin similarly to the slider 12, the slider 12 has lubricity with respect to the guide portion G.

As shown in FIGS. 4 and 6, a fitting protrusion 13 is formed at one end (right end in FIG. 6) of the slider 12 in the sliding direction, and the fitting protrusion 13 is formed on both sides of the fitting protrusion 13. Is formed with a pair of protruding portions 13a, 13b, and the pair of protruding portions 13a, 13b are fitted in a pair of fitting grooves 1c, 1d formed on the inner wall surfaces of the upper and lower half pieces 1a, 1b. The fitting protrusion 13 is formed with a first spring receiving portion 15 with which one end 14a of the torsion coil spring 14 is engaged, and the first spring receiving portion 15 is formed with a hooking portion 15a. Therefore, even if the bending length of the one end 14a of the torsion coil spring 14 is short, the engaged state is held by the hook portion 15a. A second spring receiving portion 16 to which the other end 14b of the torsion coil spring 14 is engaged is formed at the upper right end in FIG. 6 of the case 1, and the slider 12 is moved to the left in FIG. 6 by the biasing force of the torsion coil spring 14. I am biased toward. Further, the fitting protrusion 13 is formed with a split groove 13c into which the torsion coil spring 14 can be fitted. On the other hand, a similar fitting protrusion 16 is formed at the other end (the left end in FIG. 3) of the slider 12 in the sliding direction.
Is formed, and the protruding portion (not shown) also includes the upper and lower half pieces 1.
It is fitted in a fitting groove (not shown) of a and 1b.

By the way, when the front and back of the disk cartridge are erroneously mounted on the recording / reproducing apparatus, the opening / closing pin P of the recording / reproducing apparatus is opposite to the predetermined position of the case 1 (that is, in the same figure). It is located at the lower right end) and is fitted into the notches 10a and 10b. When the opening / closing pin P is fitted into the notches 10a and 10b, the opening / closing pin P tries to open the shutter 5 and mistakenly moves toward the upper left side in FIG. However, even if the opening / closing pin P tries to move, as described above, the pair of malfunction prevention walls 11a,
Since 11b is formed to have a sufficiently high predetermined height and the pair of malfunction preventing walls 11a and 11b are set to substantially the same height, the opening / closing pin P has the pair of malfunction preventing walls 11a and 11b.
This opening / closing pin P cannot be overcome by overcoming a and 11b.
Movement is completely blocked. Therefore, the shutter 5 and the case 1 are prevented from being damaged by the malfunction of the open / close pin P, and the disk cartridge can be used in the future.

[0016]

As described above, according to the present invention, the height of the pair of malfunction preventing walls is set to a predetermined height which is sufficiently higher than the height of the opening / closing pin fitted in the notch. It is not possible to get over the barrier and the movement of the opening / closing pin is completely blocked. Therefore, the shutter, the case, etc. of the disk cartridge are prevented from being damaged by the malfunction of the open / close pin, and the disk cartridge can be used in the future.

[Brief description of drawings]

FIG. 1 is a front perspective view of a disc cartridge.

FIG. 2 is a perspective view of the back side of the disc cartridge.

FIG. 3 is a front view of a disc cartridge.

FIG. 4 is a partially enlarged sectional view (sectional view taken along the line IV-IV in FIG. 7).

FIG. 5 is a plan view of a disc cartridge.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partially enlarged perspective view of a disc cartridge.

FIG. 8 is a rear perspective view of a conventional disc cartridge.

FIG. 9 is a partially enlarged perspective view of a conventional disc cartridge.

10 is a sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

 1 ... Case 5 ... Shutter 10a, 10b ... Notch 11a, 11b ... Malfunction prevention wall P ... Opening / closing pin

Claims (1)

[Claims] 1. A case accommodating a disk-shaped recording medium, a shutter attached to the case and opened / closed by an opening / closing pin, a notch formed in the case into which the opening / closing pin can be fitted, and adjacent to the notch. And a pair of malfunction prevention walls for preventing malfunction of the opening / closing pin formed on the case, and the pair of malfunction preventing walls is set to a predetermined height sufficiently higher than the opening / closing pin fitted in the notch. A disk cartridge characterized by the above.